diff options
Diffstat (limited to 'vendor/golang.org/x')
| -rw-r--r-- | vendor/golang.org/x/crypto/ed25519/ed25519.go | 181 | ||||
| -rw-r--r-- | vendor/golang.org/x/crypto/ed25519/internal/edwards25519/const.go | 1422 | ||||
| -rw-r--r-- | vendor/golang.org/x/crypto/ed25519/internal/edwards25519/edwards25519.go | 1771 | ||||
| -rw-r--r-- | vendor/golang.org/x/net/internal/timeseries/timeseries.go | 525 | ||||
| -rw-r--r-- | vendor/golang.org/x/net/trace/events.go | 532 | ||||
| -rw-r--r-- | vendor/golang.org/x/net/trace/histogram.go | 365 | ||||
| -rw-r--r-- | vendor/golang.org/x/net/trace/trace.go | 1079 |
7 files changed, 0 insertions, 5875 deletions
diff --git a/vendor/golang.org/x/crypto/ed25519/ed25519.go b/vendor/golang.org/x/crypto/ed25519/ed25519.go deleted file mode 100644 index 16cd38546..000000000 --- a/vendor/golang.org/x/crypto/ed25519/ed25519.go +++ /dev/null @@ -1,181 +0,0 @@ -// Copyright 2016 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Package ed25519 implements the Ed25519 signature algorithm. See -// https://ed25519.cr.yp.to/. -// -// These functions are also compatible with the “Ed25519” function defined in -// https://tools.ietf.org/html/draft-irtf-cfrg-eddsa-05. -package ed25519 - -// This code is a port of the public domain, “ref10” implementation of ed25519 -// from SUPERCOP. - -import ( - "bytes" - "crypto" - cryptorand "crypto/rand" - "crypto/sha512" - "errors" - "io" - "strconv" - - "golang.org/x/crypto/ed25519/internal/edwards25519" -) - -const ( - // PublicKeySize is the size, in bytes, of public keys as used in this package. - PublicKeySize = 32 - // PrivateKeySize is the size, in bytes, of private keys as used in this package. - PrivateKeySize = 64 - // SignatureSize is the size, in bytes, of signatures generated and verified by this package. - SignatureSize = 64 -) - -// PublicKey is the type of Ed25519 public keys. -type PublicKey []byte - -// PrivateKey is the type of Ed25519 private keys. It implements crypto.Signer. -type PrivateKey []byte - -// Public returns the PublicKey corresponding to priv. -func (priv PrivateKey) Public() crypto.PublicKey { - publicKey := make([]byte, PublicKeySize) - copy(publicKey, priv[32:]) - return PublicKey(publicKey) -} - -// Sign signs the given message with priv. -// Ed25519 performs two passes over messages to be signed and therefore cannot -// handle pre-hashed messages. Thus opts.HashFunc() must return zero to -// indicate the message hasn't been hashed. This can be achieved by passing -// crypto.Hash(0) as the value for opts. -func (priv PrivateKey) Sign(rand io.Reader, message []byte, opts crypto.SignerOpts) (signature []byte, err error) { - if opts.HashFunc() != crypto.Hash(0) { - return nil, errors.New("ed25519: cannot sign hashed message") - } - - return Sign(priv, message), nil -} - -// GenerateKey generates a public/private key pair using entropy from rand. -// If rand is nil, crypto/rand.Reader will be used. -func GenerateKey(rand io.Reader) (publicKey PublicKey, privateKey PrivateKey, err error) { - if rand == nil { - rand = cryptorand.Reader - } - - privateKey = make([]byte, PrivateKeySize) - publicKey = make([]byte, PublicKeySize) - _, err = io.ReadFull(rand, privateKey[:32]) - if err != nil { - return nil, nil, err - } - - digest := sha512.Sum512(privateKey[:32]) - digest[0] &= 248 - digest[31] &= 127 - digest[31] |= 64 - - var A edwards25519.ExtendedGroupElement - var hBytes [32]byte - copy(hBytes[:], digest[:]) - edwards25519.GeScalarMultBase(&A, &hBytes) - var publicKeyBytes [32]byte - A.ToBytes(&publicKeyBytes) - - copy(privateKey[32:], publicKeyBytes[:]) - copy(publicKey, publicKeyBytes[:]) - - return publicKey, privateKey, nil -} - -// Sign signs the message with privateKey and returns a signature. It will -// panic if len(privateKey) is not PrivateKeySize. -func Sign(privateKey PrivateKey, message []byte) []byte { - if l := len(privateKey); l != PrivateKeySize { - panic("ed25519: bad private key length: " + strconv.Itoa(l)) - } - - h := sha512.New() - h.Write(privateKey[:32]) - - var digest1, messageDigest, hramDigest [64]byte - var expandedSecretKey [32]byte - h.Sum(digest1[:0]) - copy(expandedSecretKey[:], digest1[:]) - expandedSecretKey[0] &= 248 - expandedSecretKey[31] &= 63 - expandedSecretKey[31] |= 64 - - h.Reset() - h.Write(digest1[32:]) - h.Write(message) - h.Sum(messageDigest[:0]) - - var messageDigestReduced [32]byte - edwards25519.ScReduce(&messageDigestReduced, &messageDigest) - var R edwards25519.ExtendedGroupElement - edwards25519.GeScalarMultBase(&R, &messageDigestReduced) - - var encodedR [32]byte - R.ToBytes(&encodedR) - - h.Reset() - h.Write(encodedR[:]) - h.Write(privateKey[32:]) - h.Write(message) - h.Sum(hramDigest[:0]) - var hramDigestReduced [32]byte - edwards25519.ScReduce(&hramDigestReduced, &hramDigest) - - var s [32]byte - edwards25519.ScMulAdd(&s, &hramDigestReduced, &expandedSecretKey, &messageDigestReduced) - - signature := make([]byte, SignatureSize) - copy(signature[:], encodedR[:]) - copy(signature[32:], s[:]) - - return signature -} - -// Verify reports whether sig is a valid signature of message by publicKey. It -// will panic if len(publicKey) is not PublicKeySize. -func Verify(publicKey PublicKey, message, sig []byte) bool { - if l := len(publicKey); l != PublicKeySize { - panic("ed25519: bad public key length: " + strconv.Itoa(l)) - } - - if len(sig) != SignatureSize || sig[63]&224 != 0 { - return false - } - - var A edwards25519.ExtendedGroupElement - var publicKeyBytes [32]byte - copy(publicKeyBytes[:], publicKey) - if !A.FromBytes(&publicKeyBytes) { - return false - } - edwards25519.FeNeg(&A.X, &A.X) - edwards25519.FeNeg(&A.T, &A.T) - - h := sha512.New() - h.Write(sig[:32]) - h.Write(publicKey[:]) - h.Write(message) - var digest [64]byte - h.Sum(digest[:0]) - - var hReduced [32]byte - edwards25519.ScReduce(&hReduced, &digest) - - var R edwards25519.ProjectiveGroupElement - var b [32]byte - copy(b[:], sig[32:]) - edwards25519.GeDoubleScalarMultVartime(&R, &hReduced, &A, &b) - - var checkR [32]byte - R.ToBytes(&checkR) - return bytes.Equal(sig[:32], checkR[:]) -} diff --git a/vendor/golang.org/x/crypto/ed25519/internal/edwards25519/const.go b/vendor/golang.org/x/crypto/ed25519/internal/edwards25519/const.go deleted file mode 100644 index e39f086c1..000000000 --- a/vendor/golang.org/x/crypto/ed25519/internal/edwards25519/const.go +++ /dev/null @@ -1,1422 +0,0 @@ -// Copyright 2016 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package edwards25519 - -// These values are from the public domain, “ref10” implementation of ed25519 -// from SUPERCOP. - -// d is a constant in the Edwards curve equation. -var d = FieldElement{ - -10913610, 13857413, -15372611, 6949391, 114729, -8787816, -6275908, -3247719, -18696448, -12055116, -} - -// d2 is 2*d. -var d2 = FieldElement{ - -21827239, -5839606, -30745221, 13898782, 229458, 15978800, -12551817, -6495438, 29715968, 9444199, -} - -// SqrtM1 is the square-root of -1 in the field. -var SqrtM1 = FieldElement{ - -32595792, -7943725, 9377950, 3500415, 12389472, -272473, -25146209, -2005654, 326686, 11406482, -} - -// A is a constant in the Montgomery-form of curve25519. -var A = FieldElement{ - 486662, 0, 0, 0, 0, 0, 0, 0, 0, 0, -} - -// bi contains precomputed multiples of the base-point. See the Ed25519 paper -// for a discussion about how these values are used. -var bi = [8]PreComputedGroupElement{ - { - FieldElement{25967493, -14356035, 29566456, 3660896, -12694345, 4014787, 27544626, -11754271, -6079156, 2047605}, - FieldElement{-12545711, 934262, -2722910, 3049990, -727428, 9406986, 12720692, 5043384, 19500929, -15469378}, - FieldElement{-8738181, 4489570, 9688441, -14785194, 10184609, -12363380, 29287919, 11864899, -24514362, -4438546}, - }, - { - FieldElement{15636291, -9688557, 24204773, -7912398, 616977, -16685262, 27787600, -14772189, 28944400, -1550024}, - FieldElement{16568933, 4717097, -11556148, -1102322, 15682896, -11807043, 16354577, -11775962, 7689662, 11199574}, - FieldElement{30464156, -5976125, -11779434, -15670865, 23220365, 15915852, 7512774, 10017326, -17749093, -9920357}, - }, - { - FieldElement{10861363, 11473154, 27284546, 1981175, -30064349, 12577861, 32867885, 14515107, -15438304, 10819380}, - FieldElement{4708026, 6336745, 20377586, 9066809, -11272109, 6594696, -25653668, 12483688, -12668491, 5581306}, - FieldElement{19563160, 16186464, -29386857, 4097519, 10237984, -4348115, 28542350, 13850243, -23678021, -15815942}, - }, - { - FieldElement{5153746, 9909285, 1723747, -2777874, 30523605, 5516873, 19480852, 5230134, -23952439, -15175766}, - FieldElement{-30269007, -3463509, 7665486, 10083793, 28475525, 1649722, 20654025, 16520125, 30598449, 7715701}, - FieldElement{28881845, 14381568, 9657904, 3680757, -20181635, 7843316, -31400660, 1370708, 29794553, -1409300}, - }, - { - FieldElement{-22518993, -6692182, 14201702, -8745502, -23510406, 8844726, 18474211, -1361450, -13062696, 13821877}, - FieldElement{-6455177, -7839871, 3374702, -4740862, -27098617, -10571707, 31655028, -7212327, 18853322, -14220951}, - FieldElement{4566830, -12963868, -28974889, -12240689, -7602672, -2830569, -8514358, -10431137, 2207753, -3209784}, - }, - { - FieldElement{-25154831, -4185821, 29681144, 7868801, -6854661, -9423865, -12437364, -663000, -31111463, -16132436}, - FieldElement{25576264, -2703214, 7349804, -11814844, 16472782, 9300885, 3844789, 15725684, 171356, 6466918}, - FieldElement{23103977, 13316479, 9739013, -16149481, 817875, -15038942, 8965339, -14088058, -30714912, 16193877}, - }, - { - FieldElement{-33521811, 3180713, -2394130, 14003687, -16903474, -16270840, 17238398, 4729455, -18074513, 9256800}, - FieldElement{-25182317, -4174131, 32336398, 5036987, -21236817, 11360617, 22616405, 9761698, -19827198, 630305}, - FieldElement{-13720693, 2639453, -24237460, -7406481, 9494427, -5774029, -6554551, -15960994, -2449256, -14291300}, - }, - { - FieldElement{-3151181, -5046075, 9282714, 6866145, -31907062, -863023, -18940575, 15033784, 25105118, -7894876}, - FieldElement{-24326370, 15950226, -31801215, -14592823, -11662737, -5090925, 1573892, -2625887, 2198790, -15804619}, - FieldElement{-3099351, 10324967, -2241613, 7453183, -5446979, -2735503, -13812022, -16236442, -32461234, -12290683}, - }, -} - -// base contains precomputed multiples of the base-point. See the Ed25519 paper -// for a discussion about how these values are used. -var base = [32][8]PreComputedGroupElement{ - { - { - FieldElement{25967493, -14356035, 29566456, 3660896, -12694345, 4014787, 27544626, -11754271, -6079156, 2047605}, - FieldElement{-12545711, 934262, -2722910, 3049990, -727428, 9406986, 12720692, 5043384, 19500929, -15469378}, - FieldElement{-8738181, 4489570, 9688441, -14785194, 10184609, -12363380, 29287919, 11864899, -24514362, -4438546}, - }, - { - FieldElement{-12815894, -12976347, -21581243, 11784320, -25355658, -2750717, -11717903, -3814571, -358445, -10211303}, - FieldElement{-21703237, 6903825, 27185491, 6451973, -29577724, -9554005, -15616551, 11189268, -26829678, -5319081}, - FieldElement{26966642, 11152617, 32442495, 15396054, 14353839, -12752335, -3128826, -9541118, -15472047, -4166697}, - }, - { - FieldElement{15636291, -9688557, 24204773, -7912398, 616977, -16685262, 27787600, -14772189, 28944400, -1550024}, - FieldElement{16568933, 4717097, -11556148, -1102322, 15682896, -11807043, 16354577, -11775962, 7689662, 11199574}, - FieldElement{30464156, -5976125, -11779434, -15670865, 23220365, 15915852, 7512774, 10017326, -17749093, -9920357}, - }, - { - FieldElement{-17036878, 13921892, 10945806, -6033431, 27105052, -16084379, -28926210, 15006023, 3284568, -6276540}, - FieldElement{23599295, -8306047, -11193664, -7687416, 13236774, 10506355, 7464579, 9656445, 13059162, 10374397}, - FieldElement{7798556, 16710257, 3033922, 2874086, 28997861, 2835604, 32406664, -3839045, -641708, -101325}, - }, - { - FieldElement{10861363, 11473154, 27284546, 1981175, -30064349, 12577861, 32867885, 14515107, -15438304, 10819380}, - FieldElement{4708026, 6336745, 20377586, 9066809, -11272109, 6594696, -25653668, 12483688, -12668491, 5581306}, - FieldElement{19563160, 16186464, -29386857, 4097519, 10237984, -4348115, 28542350, 13850243, -23678021, -15815942}, - }, - { - FieldElement{-15371964, -12862754, 32573250, 4720197, -26436522, 5875511, -19188627, -15224819, -9818940, -12085777}, - FieldElement{-8549212, 109983, 15149363, 2178705, 22900618, 4543417, 3044240, -15689887, 1762328, 14866737}, - FieldElement{-18199695, -15951423, -10473290, 1707278, -17185920, 3916101, -28236412, 3959421, 27914454, 4383652}, - }, - { - FieldElement{5153746, 9909285, 1723747, -2777874, 30523605, 5516873, 19480852, 5230134, -23952439, -15175766}, - FieldElement{-30269007, -3463509, 7665486, 10083793, 28475525, 1649722, 20654025, 16520125, 30598449, 7715701}, - FieldElement{28881845, 14381568, 9657904, 3680757, -20181635, 7843316, -31400660, 1370708, 29794553, -1409300}, - }, - { - FieldElement{14499471, -2729599, -33191113, -4254652, 28494862, 14271267, 30290735, 10876454, -33154098, 2381726}, - FieldElement{-7195431, -2655363, -14730155, 462251, -27724326, 3941372, -6236617, 3696005, -32300832, 15351955}, - FieldElement{27431194, 8222322, 16448760, -3907995, -18707002, 11938355, -32961401, -2970515, 29551813, 10109425}, - }, - }, - { - { - FieldElement{-13657040, -13155431, -31283750, 11777098, 21447386, 6519384, -2378284, -1627556, 10092783, -4764171}, - FieldElement{27939166, 14210322, 4677035, 16277044, -22964462, -12398139, -32508754, 12005538, -17810127, 12803510}, - FieldElement{17228999, -15661624, -1233527, 300140, -1224870, -11714777, 30364213, -9038194, 18016357, 4397660}, - }, - { - FieldElement{-10958843, -7690207, 4776341, -14954238, 27850028, -15602212, -26619106, 14544525, -17477504, 982639}, - FieldElement{29253598, 15796703, -2863982, -9908884, 10057023, 3163536, 7332899, -4120128, -21047696, 9934963}, - FieldElement{5793303, 16271923, -24131614, -10116404, 29188560, 1206517, -14747930, 4559895, -30123922, -10897950}, - }, - { - FieldElement{-27643952, -11493006, 16282657, -11036493, 28414021, -15012264, 24191034, 4541697, -13338309, 5500568}, - FieldElement{12650548, -1497113, 9052871, 11355358, -17680037, -8400164, -17430592, 12264343, 10874051, 13524335}, - FieldElement{25556948, -3045990, 714651, 2510400, 23394682, -10415330, 33119038, 5080568, -22528059, 5376628}, - }, - { - FieldElement{-26088264, -4011052, -17013699, -3537628, -6726793, 1920897, -22321305, -9447443, 4535768, 1569007}, - FieldElement{-2255422, 14606630, -21692440, -8039818, 28430649, 8775819, -30494562, 3044290, 31848280, 12543772}, - FieldElement{-22028579, 2943893, -31857513, 6777306, 13784462, -4292203, -27377195, -2062731, 7718482, 14474653}, - }, - { - FieldElement{2385315, 2454213, -22631320, 46603, -4437935, -15680415, 656965, -7236665, 24316168, -5253567}, - FieldElement{13741529, 10911568, -33233417, -8603737, -20177830, -1033297, 33040651, -13424532, -20729456, 8321686}, - FieldElement{21060490, -2212744, 15712757, -4336099, 1639040, 10656336, 23845965, -11874838, -9984458, 608372}, - }, - { - FieldElement{-13672732, -15087586, -10889693, -7557059, -6036909, 11305547, 1123968, -6780577, 27229399, 23887}, - FieldElement{-23244140, -294205, -11744728, 14712571, -29465699, -2029617, 12797024, -6440308, -1633405, 16678954}, - FieldElement{-29500620, 4770662, -16054387, 14001338, 7830047, 9564805, -1508144, -4795045, -17169265, 4904953}, - }, - { - FieldElement{24059557, 14617003, 19037157, -15039908, 19766093, -14906429, 5169211, 16191880, 2128236, -4326833}, - FieldElement{-16981152, 4124966, -8540610, -10653797, 30336522, -14105247, -29806336, 916033, -6882542, -2986532}, - FieldElement{-22630907, 12419372, -7134229, -7473371, -16478904, 16739175, 285431, 2763829, 15736322, 4143876}, - }, - { - FieldElement{2379352, 11839345, -4110402, -5988665, 11274298, 794957, 212801, -14594663, 23527084, -16458268}, - FieldElement{33431127, -11130478, -17838966, -15626900, 8909499, 8376530, -32625340, 4087881, -15188911, -14416214}, - FieldElement{1767683, 7197987, -13205226, -2022635, -13091350, 448826, 5799055, 4357868, -4774191, -16323038}, - }, - }, - { - { - FieldElement{6721966, 13833823, -23523388, -1551314, 26354293, -11863321, 23365147, -3949732, 7390890, 2759800}, - FieldElement{4409041, 2052381, 23373853, 10530217, 7676779, -12885954, 21302353, -4264057, 1244380, -12919645}, - FieldElement{-4421239, 7169619, 4982368, -2957590, 30256825, -2777540, 14086413, 9208236, 15886429, 16489664}, - }, - { - FieldElement{1996075, 10375649, 14346367, 13311202, -6874135, -16438411, -13693198, 398369, -30606455, -712933}, - FieldElement{-25307465, 9795880, -2777414, 14878809, -33531835, 14780363, 13348553, 12076947, -30836462, 5113182}, - FieldElement{-17770784, 11797796, 31950843, 13929123, -25888302, 12288344, -30341101, -7336386, 13847711, 5387222}, - }, - { - FieldElement{-18582163, -3416217, 17824843, -2340966, 22744343, -10442611, 8763061, 3617786, -19600662, 10370991}, - FieldElement{20246567, -14369378, 22358229, -543712, 18507283, -10413996, 14554437, -8746092, 32232924, 16763880}, - FieldElement{9648505, 10094563, 26416693, 14745928, -30374318, -6472621, 11094161, 15689506, 3140038, -16510092}, - }, - { - FieldElement{-16160072, 5472695, 31895588, 4744994, 8823515, 10365685, -27224800, 9448613, -28774454, 366295}, - FieldElement{19153450, 11523972, -11096490, -6503142, -24647631, 5420647, 28344573, 8041113, 719605, 11671788}, - FieldElement{8678025, 2694440, -6808014, 2517372, 4964326, 11152271, -15432916, -15266516, 27000813, -10195553}, - }, - { - FieldElement{-15157904, 7134312, 8639287, -2814877, -7235688, 10421742, 564065, 5336097, 6750977, -14521026}, - FieldElement{11836410, -3979488, 26297894, 16080799, 23455045, 15735944, 1695823, -8819122, 8169720, 16220347}, - FieldElement{-18115838, 8653647, 17578566, -6092619, -8025777, -16012763, -11144307, -2627664, -5990708, -14166033}, - }, - { - FieldElement{-23308498, -10968312, 15213228, -10081214, -30853605, -11050004, 27884329, 2847284, 2655861, 1738395}, - FieldElement{-27537433, -14253021, -25336301, -8002780, -9370762, 8129821, 21651608, -3239336, -19087449, -11005278}, - FieldElement{1533110, 3437855, 23735889, 459276, 29970501, 11335377, 26030092, 5821408, 10478196, 8544890}, - }, - { - FieldElement{32173121, -16129311, 24896207, 3921497, 22579056, -3410854, 19270449, 12217473, 17789017, -3395995}, - FieldElement{-30552961, -2228401, -15578829, -10147201, 13243889, 517024, 15479401, -3853233, 30460520, 1052596}, - FieldElement{-11614875, 13323618, 32618793, 8175907, -15230173, 12596687, 27491595, -4612359, 3179268, -9478891}, - }, - { - FieldElement{31947069, -14366651, -4640583, -15339921, -15125977, -6039709, -14756777, -16411740, 19072640, -9511060}, - FieldElement{11685058, 11822410, 3158003, -13952594, 33402194, -4165066, 5977896, -5215017, 473099, 5040608}, - FieldElement{-20290863, 8198642, -27410132, 11602123, 1290375, -2799760, 28326862, 1721092, -19558642, -3131606}, - }, - }, - { - { - FieldElement{7881532, 10687937, 7578723, 7738378, -18951012, -2553952, 21820786, 8076149, -27868496, 11538389}, - FieldElement{-19935666, 3899861, 18283497, -6801568, -15728660, -11249211, 8754525, 7446702, -5676054, 5797016}, - FieldElement{-11295600, -3793569, -15782110, -7964573, 12708869, -8456199, 2014099, -9050574, -2369172, -5877341}, - }, - { - FieldElement{-22472376, -11568741, -27682020, 1146375, 18956691, 16640559, 1192730, -3714199, 15123619, 10811505}, - FieldElement{14352098, -3419715, -18942044, 10822655, 32750596, 4699007, -70363, 15776356, -28886779, -11974553}, - FieldElement{-28241164, -8072475, -4978962, -5315317, 29416931, 1847569, -20654173, -16484855, 4714547, -9600655}, - }, - { - FieldElement{15200332, 8368572, 19679101, 15970074, -31872674, 1959451, 24611599, -4543832, -11745876, 12340220}, - FieldElement{12876937, -10480056, 33134381, 6590940, -6307776, 14872440, 9613953, 8241152, 15370987, 9608631}, - 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FieldElement{33338237, -8505733, 12532113, 7977527, 9106186, -1715251, -17720195, -4612972, -4451357, -14669444}, - }, - { - FieldElement{-20045281, 5454097, -14346548, 6447146, 28862071, 1883651, -2469266, -4141880, 7770569, 9620597}, - FieldElement{23208068, 7979712, 33071466, 8149229, 1758231, -10834995, 30945528, -1694323, -33502340, -14767970}, - FieldElement{1439958, -16270480, -1079989, -793782, 4625402, 10647766, -5043801, 1220118, 30494170, -11440799}, - }, - { - FieldElement{-5037580, -13028295, -2970559, -3061767, 15640974, -6701666, -26739026, 926050, -1684339, -13333647}, - FieldElement{13908495, -3549272, 30919928, -6273825, -21521863, 7989039, 9021034, 9078865, 3353509, 4033511}, - FieldElement{-29663431, -15113610, 32259991, -344482, 24295849, -12912123, 23161163, 8839127, 27485041, 7356032}, - }, - }, - { - { - FieldElement{9661027, 705443, 11980065, -5370154, -1628543, 14661173, -6346142, 2625015, 28431036, -16771834}, - FieldElement{-23839233, -8311415, -25945511, 7480958, -17681669, -8354183, -22545972, 14150565, 15970762, 4099461}, - FieldElement{29262576, 16756590, 26350592, -8793563, 8529671, -11208050, 13617293, -9937143, 11465739, 8317062}, - }, - { - FieldElement{-25493081, -6962928, 32500200, -9419051, -23038724, -2302222, 14898637, 3848455, 20969334, -5157516}, - FieldElement{-20384450, -14347713, -18336405, 13884722, -33039454, 2842114, -21610826, -3649888, 11177095, 14989547}, - FieldElement{-24496721, -11716016, 16959896, 2278463, 12066309, 10137771, 13515641, 2581286, -28487508, 9930240}, - }, - { - FieldElement{-17751622, -2097826, 16544300, -13009300, -15914807, -14949081, 18345767, -13403753, 16291481, -5314038}, - FieldElement{-33229194, 2553288, 32678213, 9875984, 8534129, 6889387, -9676774, 6957617, 4368891, 9788741}, - FieldElement{16660756, 7281060, -10830758, 12911820, 20108584, -8101676, -21722536, -8613148, 16250552, -11111103}, - }, - { - FieldElement{-19765507, 2390526, -16551031, 14161980, 1905286, 6414907, 4689584, 10604807, -30190403, 4782747}, - FieldElement{-1354539, 14736941, -7367442, -13292886, 7710542, -14155590, -9981571, 4383045, 22546403, 437323}, - FieldElement{31665577, -12180464, -16186830, 1491339, -18368625, 3294682, 27343084, 2786261, -30633590, -14097016}, - }, - { - FieldElement{-14467279, -683715, -33374107, 7448552, 19294360, 14334329, -19690631, 2355319, -19284671, -6114373}, - FieldElement{15121312, -15796162, 6377020, -6031361, -10798111, -12957845, 18952177, 15496498, -29380133, 11754228}, - FieldElement{-2637277, -13483075, 8488727, -14303896, 12728761, -1622493, 7141596, 11724556, 22761615, -10134141}, - }, - { - FieldElement{16918416, 11729663, -18083579, 3022987, -31015732, -13339659, -28741185, -12227393, 32851222, 11717399}, - FieldElement{11166634, 7338049, -6722523, 4531520, -29468672, -7302055, 31474879, 3483633, -1193175, -4030831}, - FieldElement{-185635, 9921305, 31456609, -13536438, -12013818, 13348923, 33142652, 6546660, -19985279, -3948376}, - }, - { - FieldElement{-32460596, 11266712, -11197107, -7899103, 31703694, 3855903, -8537131, -12833048, -30772034, -15486313}, - FieldElement{-18006477, 12709068, 3991746, -6479188, -21491523, -10550425, -31135347, -16049879, 10928917, 3011958}, - FieldElement{-6957757, -15594337, 31696059, 334240, 29576716, 14796075, -30831056, -12805180, 18008031, 10258577}, - }, - { - FieldElement{-22448644, 15655569, 7018479, -4410003, -30314266, -1201591, -1853465, 1367120, 25127874, 6671743}, - FieldElement{29701166, -14373934, -10878120, 9279288, -17568, 13127210, 21382910, 11042292, 25838796, 4642684}, - FieldElement{-20430234, 14955537, -24126347, 8124619, -5369288, -5990470, 30468147, -13900640, 18423289, 4177476}, - }, - }, -} diff --git a/vendor/golang.org/x/crypto/ed25519/internal/edwards25519/edwards25519.go b/vendor/golang.org/x/crypto/ed25519/internal/edwards25519/edwards25519.go deleted file mode 100644 index 5f8b99478..000000000 --- a/vendor/golang.org/x/crypto/ed25519/internal/edwards25519/edwards25519.go +++ /dev/null @@ -1,1771 +0,0 @@ -// Copyright 2016 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package edwards25519 - -// This code is a port of the public domain, “ref10” implementation of ed25519 -// from SUPERCOP. - -// FieldElement represents an element of the field GF(2^255 - 19). An element -// t, entries t[0]...t[9], represents the integer t[0]+2^26 t[1]+2^51 t[2]+2^77 -// t[3]+2^102 t[4]+...+2^230 t[9]. Bounds on each t[i] vary depending on -// context. -type FieldElement [10]int32 - -var zero FieldElement - -func FeZero(fe *FieldElement) { - copy(fe[:], zero[:]) -} - -func FeOne(fe *FieldElement) { - FeZero(fe) - fe[0] = 1 -} - -func FeAdd(dst, a, b *FieldElement) { - dst[0] = a[0] + b[0] - dst[1] = a[1] + b[1] - dst[2] = a[2] + b[2] - dst[3] = a[3] + b[3] - dst[4] = a[4] + b[4] - dst[5] = a[5] + b[5] - dst[6] = a[6] + b[6] - dst[7] = a[7] + b[7] - dst[8] = a[8] + b[8] - dst[9] = a[9] + b[9] -} - -func FeSub(dst, a, b *FieldElement) { - dst[0] = a[0] - b[0] - dst[1] = a[1] - b[1] - dst[2] = a[2] - b[2] - dst[3] = a[3] - b[3] - dst[4] = a[4] - b[4] - dst[5] = a[5] - b[5] - dst[6] = a[6] - b[6] - dst[7] = a[7] - b[7] - dst[8] = a[8] - b[8] - dst[9] = a[9] - b[9] -} - -func FeCopy(dst, src *FieldElement) { - copy(dst[:], src[:]) -} - -// Replace (f,g) with (g,g) if b == 1; -// replace (f,g) with (f,g) if b == 0. -// -// Preconditions: b in {0,1}. -func FeCMove(f, g *FieldElement, b int32) { - b = -b - f[0] ^= b & (f[0] ^ g[0]) - f[1] ^= b & (f[1] ^ g[1]) - f[2] ^= b & (f[2] ^ g[2]) - f[3] ^= b & (f[3] ^ g[3]) - f[4] ^= b & (f[4] ^ g[4]) - f[5] ^= b & (f[5] ^ g[5]) - f[6] ^= b & (f[6] ^ g[6]) - f[7] ^= b & (f[7] ^ g[7]) - f[8] ^= b & (f[8] ^ g[8]) - f[9] ^= b & (f[9] ^ g[9]) -} - -func load3(in []byte) int64 { - var r int64 - r = int64(in[0]) - r |= int64(in[1]) << 8 - r |= int64(in[2]) << 16 - return r -} - -func load4(in []byte) int64 { - var r int64 - r = int64(in[0]) - r |= int64(in[1]) << 8 - r |= int64(in[2]) << 16 - r |= int64(in[3]) << 24 - return r -} - -func FeFromBytes(dst *FieldElement, src *[32]byte) { - h0 := load4(src[:]) - h1 := load3(src[4:]) << 6 - h2 := load3(src[7:]) << 5 - h3 := load3(src[10:]) << 3 - h4 := load3(src[13:]) << 2 - h5 := load4(src[16:]) - h6 := load3(src[20:]) << 7 - h7 := load3(src[23:]) << 5 - h8 := load3(src[26:]) << 4 - h9 := (load3(src[29:]) & 8388607) << 2 - - FeCombine(dst, h0, h1, h2, h3, h4, h5, h6, h7, h8, h9) -} - -// FeToBytes marshals h to s. -// Preconditions: -// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc. -// -// Write p=2^255-19; q=floor(h/p). -// Basic claim: q = floor(2^(-255)(h + 19 2^(-25)h9 + 2^(-1))). -// -// Proof: -// Have |h|<=p so |q|<=1 so |19^2 2^(-255) q|<1/4. -// Also have |h-2^230 h9|<2^230 so |19 2^(-255)(h-2^230 h9)|<1/4. -// -// Write y=2^(-1)-19^2 2^(-255)q-19 2^(-255)(h-2^230 h9). -// Then 0<y<1. -// -// Write r=h-pq. -// Have 0<=r<=p-1=2^255-20. -// Thus 0<=r+19(2^-255)r<r+19(2^-255)2^255<=2^255-1. -// -// Write x=r+19(2^-255)r+y. -// Then 0<x<2^255 so floor(2^(-255)x) = 0 so floor(q+2^(-255)x) = q. -// -// Have q+2^(-255)x = 2^(-255)(h + 19 2^(-25) h9 + 2^(-1)) -// so floor(2^(-255)(h + 19 2^(-25) h9 + 2^(-1))) = q. -func FeToBytes(s *[32]byte, h *FieldElement) { - var carry [10]int32 - - q := (19*h[9] + (1 << 24)) >> 25 - q = (h[0] + q) >> 26 - q = (h[1] + q) >> 25 - q = (h[2] + q) >> 26 - q = (h[3] + q) >> 25 - q = (h[4] + q) >> 26 - q = (h[5] + q) >> 25 - q = (h[6] + q) >> 26 - q = (h[7] + q) >> 25 - q = (h[8] + q) >> 26 - q = (h[9] + q) >> 25 - - // Goal: Output h-(2^255-19)q, which is between 0 and 2^255-20. - h[0] += 19 * q - // Goal: Output h-2^255 q, which is between 0 and 2^255-20. - - carry[0] = h[0] >> 26 - h[1] += carry[0] - h[0] -= carry[0] << 26 - carry[1] = h[1] >> 25 - h[2] += carry[1] - h[1] -= carry[1] << 25 - carry[2] = h[2] >> 26 - h[3] += carry[2] - h[2] -= carry[2] << 26 - carry[3] = h[3] >> 25 - h[4] += carry[3] - h[3] -= carry[3] << 25 - carry[4] = h[4] >> 26 - h[5] += carry[4] - h[4] -= carry[4] << 26 - carry[5] = h[5] >> 25 - h[6] += carry[5] - h[5] -= carry[5] << 25 - carry[6] = h[6] >> 26 - h[7] += carry[6] - h[6] -= carry[6] << 26 - carry[7] = h[7] >> 25 - h[8] += carry[7] - h[7] -= carry[7] << 25 - carry[8] = h[8] >> 26 - h[9] += carry[8] - h[8] -= carry[8] << 26 - carry[9] = h[9] >> 25 - h[9] -= carry[9] << 25 - // h10 = carry9 - - // Goal: Output h[0]+...+2^255 h10-2^255 q, which is between 0 and 2^255-20. - // Have h[0]+...+2^230 h[9] between 0 and 2^255-1; - // evidently 2^255 h10-2^255 q = 0. - // Goal: Output h[0]+...+2^230 h[9]. - - s[0] = byte(h[0] >> 0) - s[1] = byte(h[0] >> 8) - s[2] = byte(h[0] >> 16) - s[3] = byte((h[0] >> 24) | (h[1] << 2)) - s[4] = byte(h[1] >> 6) - s[5] = byte(h[1] >> 14) - s[6] = byte((h[1] >> 22) | (h[2] << 3)) - s[7] = byte(h[2] >> 5) - s[8] = byte(h[2] >> 13) - s[9] = byte((h[2] >> 21) | (h[3] << 5)) - s[10] = byte(h[3] >> 3) - s[11] = byte(h[3] >> 11) - s[12] = byte((h[3] >> 19) | (h[4] << 6)) - s[13] = byte(h[4] >> 2) - s[14] = byte(h[4] >> 10) - s[15] = byte(h[4] >> 18) - s[16] = byte(h[5] >> 0) - s[17] = byte(h[5] >> 8) - s[18] = byte(h[5] >> 16) - s[19] = byte((h[5] >> 24) | (h[6] << 1)) - s[20] = byte(h[6] >> 7) - s[21] = byte(h[6] >> 15) - s[22] = byte((h[6] >> 23) | (h[7] << 3)) - s[23] = byte(h[7] >> 5) - s[24] = byte(h[7] >> 13) - s[25] = byte((h[7] >> 21) | (h[8] << 4)) - s[26] = byte(h[8] >> 4) - s[27] = byte(h[8] >> 12) - s[28] = byte((h[8] >> 20) | (h[9] << 6)) - s[29] = byte(h[9] >> 2) - s[30] = byte(h[9] >> 10) - s[31] = byte(h[9] >> 18) -} - -func FeIsNegative(f *FieldElement) byte { - var s [32]byte - FeToBytes(&s, f) - return s[0] & 1 -} - -func FeIsNonZero(f *FieldElement) int32 { - var s [32]byte - FeToBytes(&s, f) - var x uint8 - for _, b := range s { - x |= b - } - x |= x >> 4 - x |= x >> 2 - x |= x >> 1 - return int32(x & 1) -} - -// FeNeg sets h = -f -// -// Preconditions: -// |f| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc. -// -// Postconditions: -// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc. -func FeNeg(h, f *FieldElement) { - h[0] = -f[0] - h[1] = -f[1] - h[2] = -f[2] - h[3] = -f[3] - h[4] = -f[4] - h[5] = -f[5] - h[6] = -f[6] - h[7] = -f[7] - h[8] = -f[8] - h[9] = -f[9] -} - -func FeCombine(h *FieldElement, h0, h1, h2, h3, h4, h5, h6, h7, h8, h9 int64) { - var c0, c1, c2, c3, c4, c5, c6, c7, c8, c9 int64 - - /* - |h0| <= (1.1*1.1*2^52*(1+19+19+19+19)+1.1*1.1*2^50*(38+38+38+38+38)) - i.e. |h0| <= 1.2*2^59; narrower ranges for h2, h4, h6, h8 - |h1| <= (1.1*1.1*2^51*(1+1+19+19+19+19+19+19+19+19)) - i.e. |h1| <= 1.5*2^58; narrower ranges for h3, h5, h7, h9 - */ - - c0 = (h0 + (1 << 25)) >> 26 - h1 += c0 - h0 -= c0 << 26 - c4 = (h4 + (1 << 25)) >> 26 - h5 += c4 - h4 -= c4 << 26 - /* |h0| <= 2^25 */ - /* |h4| <= 2^25 */ - /* |h1| <= 1.51*2^58 */ - /* |h5| <= 1.51*2^58 */ - - c1 = (h1 + (1 << 24)) >> 25 - h2 += c1 - h1 -= c1 << 25 - c5 = (h5 + (1 << 24)) >> 25 - h6 += c5 - h5 -= c5 << 25 - /* |h1| <= 2^24; from now on fits into int32 */ - /* |h5| <= 2^24; from now on fits into int32 */ - /* |h2| <= 1.21*2^59 */ - /* |h6| <= 1.21*2^59 */ - - c2 = (h2 + (1 << 25)) >> 26 - h3 += c2 - h2 -= c2 << 26 - c6 = (h6 + (1 << 25)) >> 26 - h7 += c6 - h6 -= c6 << 26 - /* |h2| <= 2^25; from now on fits into int32 unchanged */ - /* |h6| <= 2^25; from now on fits into int32 unchanged */ - /* |h3| <= 1.51*2^58 */ - /* |h7| <= 1.51*2^58 */ - - c3 = (h3 + (1 << 24)) >> 25 - h4 += c3 - h3 -= c3 << 25 - c7 = (h7 + (1 << 24)) >> 25 - h8 += c7 - h7 -= c7 << 25 - /* |h3| <= 2^24; from now on fits into int32 unchanged */ - /* |h7| <= 2^24; from now on fits into int32 unchanged */ - /* |h4| <= 1.52*2^33 */ - /* |h8| <= 1.52*2^33 */ - - c4 = (h4 + (1 << 25)) >> 26 - h5 += c4 - h4 -= c4 << 26 - c8 = (h8 + (1 << 25)) >> 26 - h9 += c8 - h8 -= c8 << 26 - /* |h4| <= 2^25; from now on fits into int32 unchanged */ - /* |h8| <= 2^25; from now on fits into int32 unchanged */ - /* |h5| <= 1.01*2^24 */ - /* |h9| <= 1.51*2^58 */ - - c9 = (h9 + (1 << 24)) >> 25 - h0 += c9 * 19 - h9 -= c9 << 25 - /* |h9| <= 2^24; from now on fits into int32 unchanged */ - /* |h0| <= 1.8*2^37 */ - - c0 = (h0 + (1 << 25)) >> 26 - h1 += c0 - h0 -= c0 << 26 - /* |h0| <= 2^25; from now on fits into int32 unchanged */ - /* |h1| <= 1.01*2^24 */ - - h[0] = int32(h0) - h[1] = int32(h1) - h[2] = int32(h2) - h[3] = int32(h3) - h[4] = int32(h4) - h[5] = int32(h5) - h[6] = int32(h6) - h[7] = int32(h7) - h[8] = int32(h8) - h[9] = int32(h9) -} - -// FeMul calculates h = f * g -// Can overlap h with f or g. -// -// Preconditions: -// |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc. -// |g| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc. -// -// Postconditions: -// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc. -// -// Notes on implementation strategy: -// -// Using schoolbook multiplication. -// Karatsuba would save a little in some cost models. -// -// Most multiplications by 2 and 19 are 32-bit precomputations; -// cheaper than 64-bit postcomputations. -// -// There is one remaining multiplication by 19 in the carry chain; -// one *19 precomputation can be merged into this, -// but the resulting data flow is considerably less clean. -// -// There are 12 carries below. -// 10 of them are 2-way parallelizable and vectorizable. -// Can get away with 11 carries, but then data flow is much deeper. -// -// With tighter constraints on inputs, can squeeze carries into int32. -func FeMul(h, f, g *FieldElement) { - f0 := int64(f[0]) - f1 := int64(f[1]) - f2 := int64(f[2]) - f3 := int64(f[3]) - f4 := int64(f[4]) - f5 := int64(f[5]) - f6 := int64(f[6]) - f7 := int64(f[7]) - f8 := int64(f[8]) - f9 := int64(f[9]) - - f1_2 := int64(2 * f[1]) - f3_2 := int64(2 * f[3]) - f5_2 := int64(2 * f[5]) - f7_2 := int64(2 * f[7]) - f9_2 := int64(2 * f[9]) - - g0 := int64(g[0]) - g1 := int64(g[1]) - g2 := int64(g[2]) - g3 := int64(g[3]) - g4 := int64(g[4]) - g5 := int64(g[5]) - g6 := int64(g[6]) - g7 := int64(g[7]) - g8 := int64(g[8]) - g9 := int64(g[9]) - - g1_19 := int64(19 * g[1]) /* 1.4*2^29 */ - g2_19 := int64(19 * g[2]) /* 1.4*2^30; still ok */ - g3_19 := int64(19 * g[3]) - g4_19 := int64(19 * g[4]) - g5_19 := int64(19 * g[5]) - g6_19 := int64(19 * g[6]) - g7_19 := int64(19 * g[7]) - g8_19 := int64(19 * g[8]) - g9_19 := int64(19 * g[9]) - - h0 := f0*g0 + f1_2*g9_19 + f2*g8_19 + f3_2*g7_19 + f4*g6_19 + f5_2*g5_19 + f6*g4_19 + f7_2*g3_19 + f8*g2_19 + f9_2*g1_19 - h1 := f0*g1 + f1*g0 + f2*g9_19 + f3*g8_19 + f4*g7_19 + f5*g6_19 + f6*g5_19 + f7*g4_19 + f8*g3_19 + f9*g2_19 - h2 := f0*g2 + f1_2*g1 + f2*g0 + f3_2*g9_19 + f4*g8_19 + f5_2*g7_19 + f6*g6_19 + f7_2*g5_19 + f8*g4_19 + f9_2*g3_19 - h3 := f0*g3 + f1*g2 + f2*g1 + f3*g0 + f4*g9_19 + f5*g8_19 + f6*g7_19 + f7*g6_19 + f8*g5_19 + f9*g4_19 - h4 := f0*g4 + f1_2*g3 + f2*g2 + f3_2*g1 + f4*g0 + f5_2*g9_19 + f6*g8_19 + f7_2*g7_19 + f8*g6_19 + f9_2*g5_19 - h5 := f0*g5 + f1*g4 + f2*g3 + f3*g2 + f4*g1 + f5*g0 + f6*g9_19 + f7*g8_19 + f8*g7_19 + f9*g6_19 - h6 := f0*g6 + f1_2*g5 + f2*g4 + f3_2*g3 + f4*g2 + f5_2*g1 + f6*g0 + f7_2*g9_19 + f8*g8_19 + f9_2*g7_19 - h7 := f0*g7 + f1*g6 + f2*g5 + f3*g4 + f4*g3 + f5*g2 + f6*g1 + f7*g0 + f8*g9_19 + f9*g8_19 - h8 := f0*g8 + f1_2*g7 + f2*g6 + f3_2*g5 + f4*g4 + f5_2*g3 + f6*g2 + f7_2*g1 + f8*g0 + f9_2*g9_19 - h9 := f0*g9 + f1*g8 + f2*g7 + f3*g6 + f4*g5 + f5*g4 + f6*g3 + f7*g2 + f8*g1 + f9*g0 - - FeCombine(h, h0, h1, h2, h3, h4, h5, h6, h7, h8, h9) -} - -func feSquare(f *FieldElement) (h0, h1, h2, h3, h4, h5, h6, h7, h8, h9 int64) { - f0 := int64(f[0]) - f1 := int64(f[1]) - f2 := int64(f[2]) - f3 := int64(f[3]) - f4 := int64(f[4]) - f5 := int64(f[5]) - f6 := int64(f[6]) - f7 := int64(f[7]) - f8 := int64(f[8]) - f9 := int64(f[9]) - f0_2 := int64(2 * f[0]) - f1_2 := int64(2 * f[1]) - f2_2 := int64(2 * f[2]) - f3_2 := int64(2 * f[3]) - f4_2 := int64(2 * f[4]) - f5_2 := int64(2 * f[5]) - f6_2 := int64(2 * f[6]) - f7_2 := int64(2 * f[7]) - f5_38 := 38 * f5 // 1.31*2^30 - f6_19 := 19 * f6 // 1.31*2^30 - f7_38 := 38 * f7 // 1.31*2^30 - f8_19 := 19 * f8 // 1.31*2^30 - f9_38 := 38 * f9 // 1.31*2^30 - - h0 = f0*f0 + f1_2*f9_38 + f2_2*f8_19 + f3_2*f7_38 + f4_2*f6_19 + f5*f5_38 - h1 = f0_2*f1 + f2*f9_38 + f3_2*f8_19 + f4*f7_38 + f5_2*f6_19 - h2 = f0_2*f2 + f1_2*f1 + f3_2*f9_38 + f4_2*f8_19 + f5_2*f7_38 + f6*f6_19 - h3 = f0_2*f3 + f1_2*f2 + f4*f9_38 + f5_2*f8_19 + f6*f7_38 - h4 = f0_2*f4 + f1_2*f3_2 + f2*f2 + f5_2*f9_38 + f6_2*f8_19 + f7*f7_38 - h5 = f0_2*f5 + f1_2*f4 + f2_2*f3 + f6*f9_38 + f7_2*f8_19 - h6 = f0_2*f6 + f1_2*f5_2 + f2_2*f4 + f3_2*f3 + f7_2*f9_38 + f8*f8_19 - h7 = f0_2*f7 + f1_2*f6 + f2_2*f5 + f3_2*f4 + f8*f9_38 - h8 = f0_2*f8 + f1_2*f7_2 + f2_2*f6 + f3_2*f5_2 + f4*f4 + f9*f9_38 - h9 = f0_2*f9 + f1_2*f8 + f2_2*f7 + f3_2*f6 + f4_2*f5 - - return -} - -// FeSquare calculates h = f*f. Can overlap h with f. -// -// Preconditions: -// |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc. -// -// Postconditions: -// |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc. -func FeSquare(h, f *FieldElement) { - h0, h1, h2, h3, h4, h5, h6, h7, h8, h9 := feSquare(f) - FeCombine(h, h0, h1, h2, h3, h4, h5, h6, h7, h8, h9) -} - -// FeSquare2 sets h = 2 * f * f -// -// Can overlap h with f. -// -// Preconditions: -// |f| bounded by 1.65*2^26,1.65*2^25,1.65*2^26,1.65*2^25,etc. -// -// Postconditions: -// |h| bounded by 1.01*2^25,1.01*2^24,1.01*2^25,1.01*2^24,etc. -// See fe_mul.c for discussion of implementation strategy. -func FeSquare2(h, f *FieldElement) { - h0, h1, h2, h3, h4, h5, h6, h7, h8, h9 := feSquare(f) - - h0 += h0 - h1 += h1 - h2 += h2 - h3 += h3 - h4 += h4 - h5 += h5 - h6 += h6 - h7 += h7 - h8 += h8 - h9 += h9 - - FeCombine(h, h0, h1, h2, h3, h4, h5, h6, h7, h8, h9) -} - -func FeInvert(out, z *FieldElement) { - var t0, t1, t2, t3 FieldElement - var i int - - FeSquare(&t0, z) // 2^1 - FeSquare(&t1, &t0) // 2^2 - for i = 1; i < 2; i++ { // 2^3 - FeSquare(&t1, &t1) - } - FeMul(&t1, z, &t1) // 2^3 + 2^0 - FeMul(&t0, &t0, &t1) // 2^3 + 2^1 + 2^0 - FeSquare(&t2, &t0) // 2^4 + 2^2 + 2^1 - FeMul(&t1, &t1, &t2) // 2^4 + 2^3 + 2^2 + 2^1 + 2^0 - FeSquare(&t2, &t1) // 5,4,3,2,1 - for i = 1; i < 5; i++ { // 9,8,7,6,5 - FeSquare(&t2, &t2) - } - FeMul(&t1, &t2, &t1) // 9,8,7,6,5,4,3,2,1,0 - FeSquare(&t2, &t1) // 10..1 - for i = 1; i < 10; i++ { // 19..10 - FeSquare(&t2, &t2) - } - FeMul(&t2, &t2, &t1) // 19..0 - FeSquare(&t3, &t2) // 20..1 - for i = 1; i < 20; i++ { // 39..20 - FeSquare(&t3, &t3) - } - FeMul(&t2, &t3, &t2) // 39..0 - FeSquare(&t2, &t2) // 40..1 - for i = 1; i < 10; i++ { // 49..10 - FeSquare(&t2, &t2) - } - FeMul(&t1, &t2, &t1) // 49..0 - FeSquare(&t2, &t1) // 50..1 - for i = 1; i < 50; i++ { // 99..50 - FeSquare(&t2, &t2) - } - FeMul(&t2, &t2, &t1) // 99..0 - FeSquare(&t3, &t2) // 100..1 - for i = 1; i < 100; i++ { // 199..100 - FeSquare(&t3, &t3) - } - FeMul(&t2, &t3, &t2) // 199..0 - FeSquare(&t2, &t2) // 200..1 - for i = 1; i < 50; i++ { // 249..50 - FeSquare(&t2, &t2) - } - FeMul(&t1, &t2, &t1) // 249..0 - FeSquare(&t1, &t1) // 250..1 - for i = 1; i < 5; i++ { // 254..5 - FeSquare(&t1, &t1) - } - FeMul(out, &t1, &t0) // 254..5,3,1,0 -} - -func fePow22523(out, z *FieldElement) { - var t0, t1, t2 FieldElement - var i int - - FeSquare(&t0, z) - for i = 1; i < 1; i++ { - FeSquare(&t0, &t0) - } - FeSquare(&t1, &t0) - for i = 1; i < 2; i++ { - FeSquare(&t1, &t1) - } - FeMul(&t1, z, &t1) - FeMul(&t0, &t0, &t1) - FeSquare(&t0, &t0) - for i = 1; i < 1; i++ { - FeSquare(&t0, &t0) - } - FeMul(&t0, &t1, &t0) - FeSquare(&t1, &t0) - for i = 1; i < 5; i++ { - FeSquare(&t1, &t1) - } - FeMul(&t0, &t1, &t0) - FeSquare(&t1, &t0) - for i = 1; i < 10; i++ { - FeSquare(&t1, &t1) - } - FeMul(&t1, &t1, &t0) - FeSquare(&t2, &t1) - for i = 1; i < 20; i++ { - FeSquare(&t2, &t2) - } - FeMul(&t1, &t2, &t1) - FeSquare(&t1, &t1) - for i = 1; i < 10; i++ { - FeSquare(&t1, &t1) - } - FeMul(&t0, &t1, &t0) - FeSquare(&t1, &t0) - for i = 1; i < 50; i++ { - FeSquare(&t1, &t1) - } - FeMul(&t1, &t1, &t0) - FeSquare(&t2, &t1) - for i = 1; i < 100; i++ { - FeSquare(&t2, &t2) - } - FeMul(&t1, &t2, &t1) - FeSquare(&t1, &t1) - for i = 1; i < 50; i++ { - FeSquare(&t1, &t1) - } - FeMul(&t0, &t1, &t0) - FeSquare(&t0, &t0) - for i = 1; i < 2; i++ { - FeSquare(&t0, &t0) - } - FeMul(out, &t0, z) -} - -// Group elements are members of the elliptic curve -x^2 + y^2 = 1 + d * x^2 * -// y^2 where d = -121665/121666. -// -// Several representations are used: -// ProjectiveGroupElement: (X:Y:Z) satisfying x=X/Z, y=Y/Z -// ExtendedGroupElement: (X:Y:Z:T) satisfying x=X/Z, y=Y/Z, XY=ZT -// CompletedGroupElement: ((X:Z),(Y:T)) satisfying x=X/Z, y=Y/T -// PreComputedGroupElement: (y+x,y-x,2dxy) - -type ProjectiveGroupElement struct { - X, Y, Z FieldElement -} - -type ExtendedGroupElement struct { - X, Y, Z, T FieldElement -} - -type CompletedGroupElement struct { - X, Y, Z, T FieldElement -} - -type PreComputedGroupElement struct { - yPlusX, yMinusX, xy2d FieldElement -} - -type CachedGroupElement struct { - yPlusX, yMinusX, Z, T2d FieldElement -} - -func (p *ProjectiveGroupElement) Zero() { - FeZero(&p.X) - FeOne(&p.Y) - FeOne(&p.Z) -} - -func (p *ProjectiveGroupElement) Double(r *CompletedGroupElement) { - var t0 FieldElement - - FeSquare(&r.X, &p.X) - FeSquare(&r.Z, &p.Y) - FeSquare2(&r.T, &p.Z) - FeAdd(&r.Y, &p.X, &p.Y) - FeSquare(&t0, &r.Y) - FeAdd(&r.Y, &r.Z, &r.X) - FeSub(&r.Z, &r.Z, &r.X) - FeSub(&r.X, &t0, &r.Y) - FeSub(&r.T, &r.T, &r.Z) -} - -func (p *ProjectiveGroupElement) ToBytes(s *[32]byte) { - var recip, x, y FieldElement - - FeInvert(&recip, &p.Z) - FeMul(&x, &p.X, &recip) - FeMul(&y, &p.Y, &recip) - FeToBytes(s, &y) - s[31] ^= FeIsNegative(&x) << 7 -} - -func (p *ExtendedGroupElement) Zero() { - FeZero(&p.X) - FeOne(&p.Y) - FeOne(&p.Z) - FeZero(&p.T) -} - -func (p *ExtendedGroupElement) Double(r *CompletedGroupElement) { - var q ProjectiveGroupElement - p.ToProjective(&q) - q.Double(r) -} - -func (p *ExtendedGroupElement) ToCached(r *CachedGroupElement) { - FeAdd(&r.yPlusX, &p.Y, &p.X) - FeSub(&r.yMinusX, &p.Y, &p.X) - FeCopy(&r.Z, &p.Z) - FeMul(&r.T2d, &p.T, &d2) -} - -func (p *ExtendedGroupElement) ToProjective(r *ProjectiveGroupElement) { - FeCopy(&r.X, &p.X) - FeCopy(&r.Y, &p.Y) - FeCopy(&r.Z, &p.Z) -} - -func (p *ExtendedGroupElement) ToBytes(s *[32]byte) { - var recip, x, y FieldElement - - FeInvert(&recip, &p.Z) - FeMul(&x, &p.X, &recip) - FeMul(&y, &p.Y, &recip) - FeToBytes(s, &y) - s[31] ^= FeIsNegative(&x) << 7 -} - -func (p *ExtendedGroupElement) FromBytes(s *[32]byte) bool { - var u, v, v3, vxx, check FieldElement - - FeFromBytes(&p.Y, s) - FeOne(&p.Z) - FeSquare(&u, &p.Y) - FeMul(&v, &u, &d) - FeSub(&u, &u, &p.Z) // y = y^2-1 - FeAdd(&v, &v, &p.Z) // v = dy^2+1 - - FeSquare(&v3, &v) - FeMul(&v3, &v3, &v) // v3 = v^3 - FeSquare(&p.X, &v3) - FeMul(&p.X, &p.X, &v) - FeMul(&p.X, &p.X, &u) // x = uv^7 - - fePow22523(&p.X, &p.X) // x = (uv^7)^((q-5)/8) - FeMul(&p.X, &p.X, &v3) - FeMul(&p.X, &p.X, &u) // x = uv^3(uv^7)^((q-5)/8) - - var tmpX, tmp2 [32]byte - - FeSquare(&vxx, &p.X) - FeMul(&vxx, &vxx, &v) - FeSub(&check, &vxx, &u) // vx^2-u - if FeIsNonZero(&check) == 1 { - FeAdd(&check, &vxx, &u) // vx^2+u - if FeIsNonZero(&check) == 1 { - return false - } - FeMul(&p.X, &p.X, &SqrtM1) - - FeToBytes(&tmpX, &p.X) - for i, v := range tmpX { - tmp2[31-i] = v - } - } - - if FeIsNegative(&p.X) != (s[31] >> 7) { - FeNeg(&p.X, &p.X) - } - - FeMul(&p.T, &p.X, &p.Y) - return true -} - -func (p *CompletedGroupElement) ToProjective(r *ProjectiveGroupElement) { - FeMul(&r.X, &p.X, &p.T) - FeMul(&r.Y, &p.Y, &p.Z) - FeMul(&r.Z, &p.Z, &p.T) -} - -func (p *CompletedGroupElement) ToExtended(r *ExtendedGroupElement) { - FeMul(&r.X, &p.X, &p.T) - FeMul(&r.Y, &p.Y, &p.Z) - FeMul(&r.Z, &p.Z, &p.T) - FeMul(&r.T, &p.X, &p.Y) -} - -func (p *PreComputedGroupElement) Zero() { - FeOne(&p.yPlusX) - FeOne(&p.yMinusX) - FeZero(&p.xy2d) -} - -func geAdd(r *CompletedGroupElement, p *ExtendedGroupElement, q *CachedGroupElement) { - var t0 FieldElement - - FeAdd(&r.X, &p.Y, &p.X) - FeSub(&r.Y, &p.Y, &p.X) - FeMul(&r.Z, &r.X, &q.yPlusX) - FeMul(&r.Y, &r.Y, &q.yMinusX) - FeMul(&r.T, &q.T2d, &p.T) - FeMul(&r.X, &p.Z, &q.Z) - FeAdd(&t0, &r.X, &r.X) - FeSub(&r.X, &r.Z, &r.Y) - FeAdd(&r.Y, &r.Z, &r.Y) - FeAdd(&r.Z, &t0, &r.T) - FeSub(&r.T, &t0, &r.T) -} - -func geSub(r *CompletedGroupElement, p *ExtendedGroupElement, q *CachedGroupElement) { - var t0 FieldElement - - FeAdd(&r.X, &p.Y, &p.X) - FeSub(&r.Y, &p.Y, &p.X) - FeMul(&r.Z, &r.X, &q.yMinusX) - FeMul(&r.Y, &r.Y, &q.yPlusX) - FeMul(&r.T, &q.T2d, &p.T) - FeMul(&r.X, &p.Z, &q.Z) - FeAdd(&t0, &r.X, &r.X) - FeSub(&r.X, &r.Z, &r.Y) - FeAdd(&r.Y, &r.Z, &r.Y) - FeSub(&r.Z, &t0, &r.T) - FeAdd(&r.T, &t0, &r.T) -} - -func geMixedAdd(r *CompletedGroupElement, p *ExtendedGroupElement, q *PreComputedGroupElement) { - var t0 FieldElement - - FeAdd(&r.X, &p.Y, &p.X) - FeSub(&r.Y, &p.Y, &p.X) - FeMul(&r.Z, &r.X, &q.yPlusX) - FeMul(&r.Y, &r.Y, &q.yMinusX) - FeMul(&r.T, &q.xy2d, &p.T) - FeAdd(&t0, &p.Z, &p.Z) - FeSub(&r.X, &r.Z, &r.Y) - FeAdd(&r.Y, &r.Z, &r.Y) - FeAdd(&r.Z, &t0, &r.T) - FeSub(&r.T, &t0, &r.T) -} - -func geMixedSub(r *CompletedGroupElement, p *ExtendedGroupElement, q *PreComputedGroupElement) { - var t0 FieldElement - - FeAdd(&r.X, &p.Y, &p.X) - FeSub(&r.Y, &p.Y, &p.X) - FeMul(&r.Z, &r.X, &q.yMinusX) - FeMul(&r.Y, &r.Y, &q.yPlusX) - FeMul(&r.T, &q.xy2d, &p.T) - FeAdd(&t0, &p.Z, &p.Z) - FeSub(&r.X, &r.Z, &r.Y) - FeAdd(&r.Y, &r.Z, &r.Y) - FeSub(&r.Z, &t0, &r.T) - FeAdd(&r.T, &t0, &r.T) -} - -func slide(r *[256]int8, a *[32]byte) { - for i := range r { - r[i] = int8(1 & (a[i>>3] >> uint(i&7))) - } - - for i := range r { - if r[i] != 0 { - for b := 1; b <= 6 && i+b < 256; b++ { - if r[i+b] != 0 { - if r[i]+(r[i+b]<<uint(b)) <= 15 { - r[i] += r[i+b] << uint(b) - r[i+b] = 0 - } else if r[i]-(r[i+b]<<uint(b)) >= -15 { - r[i] -= r[i+b] << uint(b) - for k := i + b; k < 256; k++ { - if r[k] == 0 { - r[k] = 1 - break - } - r[k] = 0 - } - } else { - break - } - } - } - } - } -} - -// GeDoubleScalarMultVartime sets r = a*A + b*B -// where a = a[0]+256*a[1]+...+256^31 a[31]. -// and b = b[0]+256*b[1]+...+256^31 b[31]. -// B is the Ed25519 base point (x,4/5) with x positive. -func GeDoubleScalarMultVartime(r *ProjectiveGroupElement, a *[32]byte, A *ExtendedGroupElement, b *[32]byte) { - var aSlide, bSlide [256]int8 - var Ai [8]CachedGroupElement // A,3A,5A,7A,9A,11A,13A,15A - var t CompletedGroupElement - var u, A2 ExtendedGroupElement - var i int - - slide(&aSlide, a) - slide(&bSlide, b) - - A.ToCached(&Ai[0]) - A.Double(&t) - t.ToExtended(&A2) - - for i := 0; i < 7; i++ { - geAdd(&t, &A2, &Ai[i]) - t.ToExtended(&u) - u.ToCached(&Ai[i+1]) - } - - r.Zero() - - for i = 255; i >= 0; i-- { - if aSlide[i] != 0 || bSlide[i] != 0 { - break - } - } - - for ; i >= 0; i-- { - r.Double(&t) - - if aSlide[i] > 0 { - t.ToExtended(&u) - geAdd(&t, &u, &Ai[aSlide[i]/2]) - } else if aSlide[i] < 0 { - t.ToExtended(&u) - geSub(&t, &u, &Ai[(-aSlide[i])/2]) - } - - if bSlide[i] > 0 { - t.ToExtended(&u) - geMixedAdd(&t, &u, &bi[bSlide[i]/2]) - } else if bSlide[i] < 0 { - t.ToExtended(&u) - geMixedSub(&t, &u, &bi[(-bSlide[i])/2]) - } - - t.ToProjective(r) - } -} - -// equal returns 1 if b == c and 0 otherwise, assuming that b and c are -// non-negative. -func equal(b, c int32) int32 { - x := uint32(b ^ c) - x-- - return int32(x >> 31) -} - -// negative returns 1 if b < 0 and 0 otherwise. -func negative(b int32) int32 { - return (b >> 31) & 1 -} - -func PreComputedGroupElementCMove(t, u *PreComputedGroupElement, b int32) { - FeCMove(&t.yPlusX, &u.yPlusX, b) - FeCMove(&t.yMinusX, &u.yMinusX, b) - FeCMove(&t.xy2d, &u.xy2d, b) -} - -func selectPoint(t *PreComputedGroupElement, pos int32, b int32) { - var minusT PreComputedGroupElement - bNegative := negative(b) - bAbs := b - (((-bNegative) & b) << 1) - - t.Zero() - for i := int32(0); i < 8; i++ { - PreComputedGroupElementCMove(t, &base[pos][i], equal(bAbs, i+1)) - } - FeCopy(&minusT.yPlusX, &t.yMinusX) - FeCopy(&minusT.yMinusX, &t.yPlusX) - FeNeg(&minusT.xy2d, &t.xy2d) - PreComputedGroupElementCMove(t, &minusT, bNegative) -} - -// GeScalarMultBase computes h = a*B, where -// a = a[0]+256*a[1]+...+256^31 a[31] -// B is the Ed25519 base point (x,4/5) with x positive. -// -// Preconditions: -// a[31] <= 127 -func GeScalarMultBase(h *ExtendedGroupElement, a *[32]byte) { - var e [64]int8 - - for i, v := range a { - e[2*i] = int8(v & 15) - e[2*i+1] = int8((v >> 4) & 15) - } - - // each e[i] is between 0 and 15 and e[63] is between 0 and 7. - - carry := int8(0) - for i := 0; i < 63; i++ { - e[i] += carry - carry = (e[i] + 8) >> 4 - e[i] -= carry << 4 - } - e[63] += carry - // each e[i] is between -8 and 8. - - h.Zero() - var t PreComputedGroupElement - var r CompletedGroupElement - for i := int32(1); i < 64; i += 2 { - selectPoint(&t, i/2, int32(e[i])) - geMixedAdd(&r, h, &t) - r.ToExtended(h) - } - - var s ProjectiveGroupElement - - h.Double(&r) - r.ToProjective(&s) - s.Double(&r) - r.ToProjective(&s) - s.Double(&r) - r.ToProjective(&s) - s.Double(&r) - r.ToExtended(h) - - for i := int32(0); i < 64; i += 2 { - selectPoint(&t, i/2, int32(e[i])) - geMixedAdd(&r, h, &t) - r.ToExtended(h) - } -} - -// The scalars are GF(2^252 + 27742317777372353535851937790883648493). - -// Input: -// a[0]+256*a[1]+...+256^31*a[31] = a -// b[0]+256*b[1]+...+256^31*b[31] = b -// c[0]+256*c[1]+...+256^31*c[31] = c -// -// Output: -// s[0]+256*s[1]+...+256^31*s[31] = (ab+c) mod l -// where l = 2^252 + 27742317777372353535851937790883648493. -func ScMulAdd(s, a, b, c *[32]byte) { - a0 := 2097151 & load3(a[:]) - a1 := 2097151 & (load4(a[2:]) >> 5) - a2 := 2097151 & (load3(a[5:]) >> 2) - a3 := 2097151 & (load4(a[7:]) >> 7) - a4 := 2097151 & (load4(a[10:]) >> 4) - a5 := 2097151 & (load3(a[13:]) >> 1) - a6 := 2097151 & (load4(a[15:]) >> 6) - a7 := 2097151 & (load3(a[18:]) >> 3) - a8 := 2097151 & load3(a[21:]) - a9 := 2097151 & (load4(a[23:]) >> 5) - a10 := 2097151 & (load3(a[26:]) >> 2) - a11 := (load4(a[28:]) >> 7) - b0 := 2097151 & load3(b[:]) - b1 := 2097151 & (load4(b[2:]) >> 5) - b2 := 2097151 & (load3(b[5:]) >> 2) - b3 := 2097151 & (load4(b[7:]) >> 7) - b4 := 2097151 & (load4(b[10:]) >> 4) - b5 := 2097151 & (load3(b[13:]) >> 1) - b6 := 2097151 & (load4(b[15:]) >> 6) - b7 := 2097151 & (load3(b[18:]) >> 3) - b8 := 2097151 & load3(b[21:]) - b9 := 2097151 & (load4(b[23:]) >> 5) - b10 := 2097151 & (load3(b[26:]) >> 2) - b11 := (load4(b[28:]) >> 7) - c0 := 2097151 & load3(c[:]) - c1 := 2097151 & (load4(c[2:]) >> 5) - c2 := 2097151 & (load3(c[5:]) >> 2) - c3 := 2097151 & (load4(c[7:]) >> 7) - c4 := 2097151 & (load4(c[10:]) >> 4) - c5 := 2097151 & (load3(c[13:]) >> 1) - c6 := 2097151 & (load4(c[15:]) >> 6) - c7 := 2097151 & (load3(c[18:]) >> 3) - c8 := 2097151 & load3(c[21:]) - c9 := 2097151 & (load4(c[23:]) >> 5) - c10 := 2097151 & (load3(c[26:]) >> 2) - c11 := (load4(c[28:]) >> 7) - var carry [23]int64 - - s0 := c0 + a0*b0 - s1 := c1 + a0*b1 + a1*b0 - s2 := c2 + a0*b2 + a1*b1 + a2*b0 - s3 := c3 + a0*b3 + a1*b2 + a2*b1 + a3*b0 - s4 := c4 + a0*b4 + a1*b3 + a2*b2 + a3*b1 + a4*b0 - s5 := c5 + a0*b5 + a1*b4 + a2*b3 + a3*b2 + a4*b1 + a5*b0 - s6 := c6 + a0*b6 + a1*b5 + a2*b4 + a3*b3 + a4*b2 + a5*b1 + a6*b0 - s7 := c7 + a0*b7 + a1*b6 + a2*b5 + a3*b4 + a4*b3 + a5*b2 + a6*b1 + a7*b0 - s8 := c8 + a0*b8 + a1*b7 + a2*b6 + a3*b5 + a4*b4 + a5*b3 + a6*b2 + a7*b1 + a8*b0 - s9 := c9 + a0*b9 + a1*b8 + a2*b7 + a3*b6 + a4*b5 + a5*b4 + a6*b3 + a7*b2 + a8*b1 + a9*b0 - s10 := c10 + a0*b10 + a1*b9 + a2*b8 + a3*b7 + a4*b6 + a5*b5 + a6*b4 + a7*b3 + a8*b2 + a9*b1 + a10*b0 - s11 := c11 + a0*b11 + a1*b10 + a2*b9 + a3*b8 + a4*b7 + a5*b6 + a6*b5 + a7*b4 + a8*b3 + a9*b2 + a10*b1 + a11*b0 - s12 := a1*b11 + a2*b10 + a3*b9 + a4*b8 + a5*b7 + a6*b6 + a7*b5 + a8*b4 + a9*b3 + a10*b2 + a11*b1 - s13 := a2*b11 + a3*b10 + a4*b9 + a5*b8 + a6*b7 + a7*b6 + a8*b5 + a9*b4 + a10*b3 + a11*b2 - s14 := a3*b11 + a4*b10 + a5*b9 + a6*b8 + a7*b7 + a8*b6 + a9*b5 + a10*b4 + a11*b3 - s15 := a4*b11 + a5*b10 + a6*b9 + a7*b8 + a8*b7 + a9*b6 + a10*b5 + a11*b4 - s16 := a5*b11 + a6*b10 + a7*b9 + a8*b8 + a9*b7 + a10*b6 + a11*b5 - s17 := a6*b11 + a7*b10 + a8*b9 + a9*b8 + a10*b7 + a11*b6 - s18 := a7*b11 + a8*b10 + a9*b9 + a10*b8 + a11*b7 - s19 := a8*b11 + a9*b10 + a10*b9 + a11*b8 - s20 := a9*b11 + a10*b10 + a11*b9 - s21 := a10*b11 + a11*b10 - s22 := a11 * b11 - s23 := int64(0) - - carry[0] = (s0 + (1 << 20)) >> 21 - s1 += carry[0] - s0 -= carry[0] << 21 - carry[2] = (s2 + (1 << 20)) >> 21 - s3 += carry[2] - s2 -= carry[2] << 21 - carry[4] = (s4 + (1 << 20)) >> 21 - s5 += carry[4] - s4 -= carry[4] << 21 - carry[6] = (s6 + (1 << 20)) >> 21 - s7 += carry[6] - s6 -= carry[6] << 21 - carry[8] = (s8 + (1 << 20)) >> 21 - s9 += carry[8] - s8 -= carry[8] << 21 - carry[10] = (s10 + (1 << 20)) >> 21 - s11 += carry[10] - s10 -= carry[10] << 21 - carry[12] = (s12 + (1 << 20)) >> 21 - s13 += carry[12] - s12 -= carry[12] << 21 - carry[14] = (s14 + (1 << 20)) >> 21 - s15 += carry[14] - s14 -= carry[14] << 21 - carry[16] = (s16 + (1 << 20)) >> 21 - s17 += carry[16] - s16 -= carry[16] << 21 - carry[18] = (s18 + (1 << 20)) >> 21 - s19 += carry[18] - s18 -= carry[18] << 21 - carry[20] = (s20 + (1 << 20)) >> 21 - s21 += carry[20] - s20 -= carry[20] << 21 - carry[22] = (s22 + (1 << 20)) >> 21 - s23 += carry[22] - s22 -= carry[22] << 21 - - carry[1] = (s1 + (1 << 20)) >> 21 - s2 += carry[1] - s1 -= carry[1] << 21 - carry[3] = (s3 + (1 << 20)) >> 21 - s4 += carry[3] - s3 -= carry[3] << 21 - carry[5] = (s5 + (1 << 20)) >> 21 - s6 += carry[5] - s5 -= carry[5] << 21 - carry[7] = (s7 + (1 << 20)) >> 21 - s8 += carry[7] - s7 -= carry[7] << 21 - carry[9] = (s9 + (1 << 20)) >> 21 - s10 += carry[9] - s9 -= carry[9] << 21 - carry[11] = (s11 + (1 << 20)) >> 21 - s12 += carry[11] - s11 -= carry[11] << 21 - carry[13] = (s13 + (1 << 20)) >> 21 - s14 += carry[13] - s13 -= carry[13] << 21 - carry[15] = (s15 + (1 << 20)) >> 21 - s16 += carry[15] - s15 -= carry[15] << 21 - carry[17] = (s17 + (1 << 20)) >> 21 - s18 += carry[17] - s17 -= carry[17] << 21 - carry[19] = (s19 + (1 << 20)) >> 21 - s20 += carry[19] - s19 -= carry[19] << 21 - carry[21] = (s21 + (1 << 20)) >> 21 - s22 += carry[21] - s21 -= carry[21] << 21 - - s11 += s23 * 666643 - s12 += s23 * 470296 - s13 += s23 * 654183 - s14 -= s23 * 997805 - s15 += s23 * 136657 - s16 -= s23 * 683901 - s23 = 0 - - s10 += s22 * 666643 - s11 += s22 * 470296 - s12 += s22 * 654183 - s13 -= s22 * 997805 - s14 += s22 * 136657 - s15 -= s22 * 683901 - s22 = 0 - - s9 += s21 * 666643 - s10 += s21 * 470296 - s11 += s21 * 654183 - s12 -= s21 * 997805 - s13 += s21 * 136657 - s14 -= s21 * 683901 - s21 = 0 - - s8 += s20 * 666643 - s9 += s20 * 470296 - s10 += s20 * 654183 - s11 -= s20 * 997805 - s12 += s20 * 136657 - s13 -= s20 * 683901 - s20 = 0 - - s7 += s19 * 666643 - s8 += s19 * 470296 - s9 += s19 * 654183 - s10 -= s19 * 997805 - s11 += s19 * 136657 - s12 -= s19 * 683901 - s19 = 0 - - s6 += s18 * 666643 - s7 += s18 * 470296 - s8 += s18 * 654183 - s9 -= s18 * 997805 - s10 += s18 * 136657 - s11 -= s18 * 683901 - s18 = 0 - - carry[6] = (s6 + (1 << 20)) >> 21 - s7 += carry[6] - s6 -= carry[6] << 21 - carry[8] = (s8 + (1 << 20)) >> 21 - s9 += carry[8] - s8 -= carry[8] << 21 - carry[10] = (s10 + (1 << 20)) >> 21 - s11 += carry[10] - s10 -= carry[10] << 21 - carry[12] = (s12 + (1 << 20)) >> 21 - s13 += carry[12] - s12 -= carry[12] << 21 - carry[14] = (s14 + (1 << 20)) >> 21 - s15 += carry[14] - s14 -= carry[14] << 21 - carry[16] = (s16 + (1 << 20)) >> 21 - s17 += carry[16] - s16 -= carry[16] << 21 - - carry[7] = (s7 + (1 << 20)) >> 21 - s8 += carry[7] - s7 -= carry[7] << 21 - carry[9] = (s9 + (1 << 20)) >> 21 - s10 += carry[9] - s9 -= carry[9] << 21 - carry[11] = (s11 + (1 << 20)) >> 21 - s12 += carry[11] - s11 -= carry[11] << 21 - carry[13] = (s13 + (1 << 20)) >> 21 - s14 += carry[13] - s13 -= carry[13] << 21 - carry[15] = (s15 + (1 << 20)) >> 21 - s16 += carry[15] - s15 -= carry[15] << 21 - - s5 += s17 * 666643 - s6 += s17 * 470296 - s7 += s17 * 654183 - s8 -= s17 * 997805 - s9 += s17 * 136657 - s10 -= s17 * 683901 - s17 = 0 - - s4 += s16 * 666643 - s5 += s16 * 470296 - s6 += s16 * 654183 - s7 -= s16 * 997805 - s8 += s16 * 136657 - s9 -= s16 * 683901 - s16 = 0 - - s3 += s15 * 666643 - s4 += s15 * 470296 - s5 += s15 * 654183 - s6 -= s15 * 997805 - s7 += s15 * 136657 - s8 -= s15 * 683901 - s15 = 0 - - s2 += s14 * 666643 - s3 += s14 * 470296 - s4 += s14 * 654183 - s5 -= s14 * 997805 - s6 += s14 * 136657 - s7 -= s14 * 683901 - s14 = 0 - - s1 += s13 * 666643 - s2 += s13 * 470296 - s3 += s13 * 654183 - s4 -= s13 * 997805 - s5 += s13 * 136657 - s6 -= s13 * 683901 - s13 = 0 - - s0 += s12 * 666643 - s1 += s12 * 470296 - s2 += s12 * 654183 - s3 -= s12 * 997805 - s4 += s12 * 136657 - s5 -= s12 * 683901 - s12 = 0 - - carry[0] = (s0 + (1 << 20)) >> 21 - s1 += carry[0] - s0 -= carry[0] << 21 - carry[2] = (s2 + (1 << 20)) >> 21 - s3 += carry[2] - s2 -= carry[2] << 21 - carry[4] = (s4 + (1 << 20)) >> 21 - s5 += carry[4] - s4 -= carry[4] << 21 - carry[6] = (s6 + (1 << 20)) >> 21 - s7 += carry[6] - s6 -= carry[6] << 21 - carry[8] = (s8 + (1 << 20)) >> 21 - s9 += carry[8] - s8 -= carry[8] << 21 - carry[10] = (s10 + (1 << 20)) >> 21 - s11 += carry[10] - s10 -= carry[10] << 21 - - carry[1] = (s1 + (1 << 20)) >> 21 - s2 += carry[1] - s1 -= carry[1] << 21 - carry[3] = (s3 + (1 << 20)) >> 21 - s4 += carry[3] - s3 -= carry[3] << 21 - carry[5] = (s5 + (1 << 20)) >> 21 - s6 += carry[5] - s5 -= carry[5] << 21 - carry[7] = (s7 + (1 << 20)) >> 21 - s8 += carry[7] - s7 -= carry[7] << 21 - carry[9] = (s9 + (1 << 20)) >> 21 - s10 += carry[9] - s9 -= carry[9] << 21 - carry[11] = (s11 + (1 << 20)) >> 21 - s12 += carry[11] - s11 -= carry[11] << 21 - - s0 += s12 * 666643 - s1 += s12 * 470296 - s2 += s12 * 654183 - s3 -= s12 * 997805 - s4 += s12 * 136657 - s5 -= s12 * 683901 - s12 = 0 - - carry[0] = s0 >> 21 - s1 += carry[0] - s0 -= carry[0] << 21 - carry[1] = s1 >> 21 - s2 += carry[1] - s1 -= carry[1] << 21 - carry[2] = s2 >> 21 - s3 += carry[2] - s2 -= carry[2] << 21 - carry[3] = s3 >> 21 - s4 += carry[3] - s3 -= carry[3] << 21 - carry[4] = s4 >> 21 - s5 += carry[4] - s4 -= carry[4] << 21 - carry[5] = s5 >> 21 - s6 += carry[5] - s5 -= carry[5] << 21 - carry[6] = s6 >> 21 - s7 += carry[6] - s6 -= carry[6] << 21 - carry[7] = s7 >> 21 - s8 += carry[7] - s7 -= carry[7] << 21 - carry[8] = s8 >> 21 - s9 += carry[8] - s8 -= carry[8] << 21 - carry[9] = s9 >> 21 - s10 += carry[9] - s9 -= carry[9] << 21 - carry[10] = s10 >> 21 - s11 += carry[10] - s10 -= carry[10] << 21 - carry[11] = s11 >> 21 - s12 += carry[11] - s11 -= carry[11] << 21 - - s0 += s12 * 666643 - s1 += s12 * 470296 - s2 += s12 * 654183 - s3 -= s12 * 997805 - s4 += s12 * 136657 - s5 -= s12 * 683901 - s12 = 0 - - carry[0] = s0 >> 21 - s1 += carry[0] - s0 -= carry[0] << 21 - carry[1] = s1 >> 21 - s2 += carry[1] - s1 -= carry[1] << 21 - carry[2] = s2 >> 21 - s3 += carry[2] - s2 -= carry[2] << 21 - carry[3] = s3 >> 21 - s4 += carry[3] - s3 -= carry[3] << 21 - carry[4] = s4 >> 21 - s5 += carry[4] - s4 -= carry[4] << 21 - carry[5] = s5 >> 21 - s6 += carry[5] - s5 -= carry[5] << 21 - carry[6] = s6 >> 21 - s7 += carry[6] - s6 -= carry[6] << 21 - carry[7] = s7 >> 21 - s8 += carry[7] - s7 -= carry[7] << 21 - carry[8] = s8 >> 21 - s9 += carry[8] - s8 -= carry[8] << 21 - carry[9] = s9 >> 21 - s10 += carry[9] - s9 -= carry[9] << 21 - carry[10] = s10 >> 21 - s11 += carry[10] - s10 -= carry[10] << 21 - - s[0] = byte(s0 >> 0) - s[1] = byte(s0 >> 8) - s[2] = byte((s0 >> 16) | (s1 << 5)) - s[3] = byte(s1 >> 3) - s[4] = byte(s1 >> 11) - s[5] = byte((s1 >> 19) | (s2 << 2)) - s[6] = byte(s2 >> 6) - s[7] = byte((s2 >> 14) | (s3 << 7)) - s[8] = byte(s3 >> 1) - s[9] = byte(s3 >> 9) - s[10] = byte((s3 >> 17) | (s4 << 4)) - s[11] = byte(s4 >> 4) - s[12] = byte(s4 >> 12) - s[13] = byte((s4 >> 20) | (s5 << 1)) - s[14] = byte(s5 >> 7) - s[15] = byte((s5 >> 15) | (s6 << 6)) - s[16] = byte(s6 >> 2) - s[17] = byte(s6 >> 10) - s[18] = byte((s6 >> 18) | (s7 << 3)) - s[19] = byte(s7 >> 5) - s[20] = byte(s7 >> 13) - s[21] = byte(s8 >> 0) - s[22] = byte(s8 >> 8) - s[23] = byte((s8 >> 16) | (s9 << 5)) - s[24] = byte(s9 >> 3) - s[25] = byte(s9 >> 11) - s[26] = byte((s9 >> 19) | (s10 << 2)) - s[27] = byte(s10 >> 6) - s[28] = byte((s10 >> 14) | (s11 << 7)) - s[29] = byte(s11 >> 1) - s[30] = byte(s11 >> 9) - s[31] = byte(s11 >> 17) -} - -// Input: -// s[0]+256*s[1]+...+256^63*s[63] = s -// -// Output: -// s[0]+256*s[1]+...+256^31*s[31] = s mod l -// where l = 2^252 + 27742317777372353535851937790883648493. -func ScReduce(out *[32]byte, s *[64]byte) { - s0 := 2097151 & load3(s[:]) - s1 := 2097151 & (load4(s[2:]) >> 5) - s2 := 2097151 & (load3(s[5:]) >> 2) - s3 := 2097151 & (load4(s[7:]) >> 7) - s4 := 2097151 & (load4(s[10:]) >> 4) - s5 := 2097151 & (load3(s[13:]) >> 1) - s6 := 2097151 & (load4(s[15:]) >> 6) - s7 := 2097151 & (load3(s[18:]) >> 3) - s8 := 2097151 & load3(s[21:]) - s9 := 2097151 & (load4(s[23:]) >> 5) - s10 := 2097151 & (load3(s[26:]) >> 2) - s11 := 2097151 & (load4(s[28:]) >> 7) - s12 := 2097151 & (load4(s[31:]) >> 4) - s13 := 2097151 & (load3(s[34:]) >> 1) - s14 := 2097151 & (load4(s[36:]) >> 6) - s15 := 2097151 & (load3(s[39:]) >> 3) - s16 := 2097151 & load3(s[42:]) - s17 := 2097151 & (load4(s[44:]) >> 5) - s18 := 2097151 & (load3(s[47:]) >> 2) - s19 := 2097151 & (load4(s[49:]) >> 7) - s20 := 2097151 & (load4(s[52:]) >> 4) - s21 := 2097151 & (load3(s[55:]) >> 1) - s22 := 2097151 & (load4(s[57:]) >> 6) - s23 := (load4(s[60:]) >> 3) - - s11 += s23 * 666643 - s12 += s23 * 470296 - s13 += s23 * 654183 - s14 -= s23 * 997805 - s15 += s23 * 136657 - s16 -= s23 * 683901 - s23 = 0 - - s10 += s22 * 666643 - s11 += s22 * 470296 - s12 += s22 * 654183 - s13 -= s22 * 997805 - s14 += s22 * 136657 - s15 -= s22 * 683901 - s22 = 0 - - s9 += s21 * 666643 - s10 += s21 * 470296 - s11 += s21 * 654183 - s12 -= s21 * 997805 - s13 += s21 * 136657 - s14 -= s21 * 683901 - s21 = 0 - - s8 += s20 * 666643 - s9 += s20 * 470296 - s10 += s20 * 654183 - s11 -= s20 * 997805 - s12 += s20 * 136657 - s13 -= s20 * 683901 - s20 = 0 - - s7 += s19 * 666643 - s8 += s19 * 470296 - s9 += s19 * 654183 - s10 -= s19 * 997805 - s11 += s19 * 136657 - s12 -= s19 * 683901 - s19 = 0 - - s6 += s18 * 666643 - s7 += s18 * 470296 - s8 += s18 * 654183 - s9 -= s18 * 997805 - s10 += s18 * 136657 - s11 -= s18 * 683901 - s18 = 0 - - var carry [17]int64 - - carry[6] = (s6 + (1 << 20)) >> 21 - s7 += carry[6] - s6 -= carry[6] << 21 - carry[8] = (s8 + (1 << 20)) >> 21 - s9 += carry[8] - s8 -= carry[8] << 21 - carry[10] = (s10 + (1 << 20)) >> 21 - s11 += carry[10] - s10 -= carry[10] << 21 - carry[12] = (s12 + (1 << 20)) >> 21 - s13 += carry[12] - s12 -= carry[12] << 21 - carry[14] = (s14 + (1 << 20)) >> 21 - s15 += carry[14] - s14 -= carry[14] << 21 - carry[16] = (s16 + (1 << 20)) >> 21 - s17 += carry[16] - s16 -= carry[16] << 21 - - carry[7] = (s7 + (1 << 20)) >> 21 - s8 += carry[7] - s7 -= carry[7] << 21 - carry[9] = (s9 + (1 << 20)) >> 21 - s10 += carry[9] - s9 -= carry[9] << 21 - carry[11] = (s11 + (1 << 20)) >> 21 - s12 += carry[11] - s11 -= carry[11] << 21 - carry[13] = (s13 + (1 << 20)) >> 21 - s14 += carry[13] - s13 -= carry[13] << 21 - carry[15] = (s15 + (1 << 20)) >> 21 - s16 += carry[15] - s15 -= carry[15] << 21 - - s5 += s17 * 666643 - s6 += s17 * 470296 - s7 += s17 * 654183 - s8 -= s17 * 997805 - s9 += s17 * 136657 - s10 -= s17 * 683901 - s17 = 0 - - s4 += s16 * 666643 - s5 += s16 * 470296 - s6 += s16 * 654183 - s7 -= s16 * 997805 - s8 += s16 * 136657 - s9 -= s16 * 683901 - s16 = 0 - - s3 += s15 * 666643 - s4 += s15 * 470296 - s5 += s15 * 654183 - s6 -= s15 * 997805 - s7 += s15 * 136657 - s8 -= s15 * 683901 - s15 = 0 - - s2 += s14 * 666643 - s3 += s14 * 470296 - s4 += s14 * 654183 - s5 -= s14 * 997805 - s6 += s14 * 136657 - s7 -= s14 * 683901 - s14 = 0 - - s1 += s13 * 666643 - s2 += s13 * 470296 - s3 += s13 * 654183 - s4 -= s13 * 997805 - s5 += s13 * 136657 - s6 -= s13 * 683901 - s13 = 0 - - s0 += s12 * 666643 - s1 += s12 * 470296 - s2 += s12 * 654183 - s3 -= s12 * 997805 - s4 += s12 * 136657 - s5 -= s12 * 683901 - s12 = 0 - - carry[0] = (s0 + (1 << 20)) >> 21 - s1 += carry[0] - s0 -= carry[0] << 21 - carry[2] = (s2 + (1 << 20)) >> 21 - s3 += carry[2] - s2 -= carry[2] << 21 - carry[4] = (s4 + (1 << 20)) >> 21 - s5 += carry[4] - s4 -= carry[4] << 21 - carry[6] = (s6 + (1 << 20)) >> 21 - s7 += carry[6] - s6 -= carry[6] << 21 - carry[8] = (s8 + (1 << 20)) >> 21 - s9 += carry[8] - s8 -= carry[8] << 21 - carry[10] = (s10 + (1 << 20)) >> 21 - s11 += carry[10] - s10 -= carry[10] << 21 - - carry[1] = (s1 + (1 << 20)) >> 21 - s2 += carry[1] - s1 -= carry[1] << 21 - carry[3] = (s3 + (1 << 20)) >> 21 - s4 += carry[3] - s3 -= carry[3] << 21 - carry[5] = (s5 + (1 << 20)) >> 21 - s6 += carry[5] - s5 -= carry[5] << 21 - carry[7] = (s7 + (1 << 20)) >> 21 - s8 += carry[7] - s7 -= carry[7] << 21 - carry[9] = (s9 + (1 << 20)) >> 21 - s10 += carry[9] - s9 -= carry[9] << 21 - carry[11] = (s11 + (1 << 20)) >> 21 - s12 += carry[11] - s11 -= carry[11] << 21 - - s0 += s12 * 666643 - s1 += s12 * 470296 - s2 += s12 * 654183 - s3 -= s12 * 997805 - s4 += s12 * 136657 - s5 -= s12 * 683901 - s12 = 0 - - carry[0] = s0 >> 21 - s1 += carry[0] - s0 -= carry[0] << 21 - carry[1] = s1 >> 21 - s2 += carry[1] - s1 -= carry[1] << 21 - carry[2] = s2 >> 21 - s3 += carry[2] - s2 -= carry[2] << 21 - carry[3] = s3 >> 21 - s4 += carry[3] - s3 -= carry[3] << 21 - carry[4] = s4 >> 21 - s5 += carry[4] - s4 -= carry[4] << 21 - carry[5] = s5 >> 21 - s6 += carry[5] - s5 -= carry[5] << 21 - carry[6] = s6 >> 21 - s7 += carry[6] - s6 -= carry[6] << 21 - carry[7] = s7 >> 21 - s8 += carry[7] - s7 -= carry[7] << 21 - carry[8] = s8 >> 21 - s9 += carry[8] - s8 -= carry[8] << 21 - carry[9] = s9 >> 21 - s10 += carry[9] - s9 -= carry[9] << 21 - carry[10] = s10 >> 21 - s11 += carry[10] - s10 -= carry[10] << 21 - carry[11] = s11 >> 21 - s12 += carry[11] - s11 -= carry[11] << 21 - - s0 += s12 * 666643 - s1 += s12 * 470296 - s2 += s12 * 654183 - s3 -= s12 * 997805 - s4 += s12 * 136657 - s5 -= s12 * 683901 - s12 = 0 - - carry[0] = s0 >> 21 - s1 += carry[0] - s0 -= carry[0] << 21 - carry[1] = s1 >> 21 - s2 += carry[1] - s1 -= carry[1] << 21 - carry[2] = s2 >> 21 - s3 += carry[2] - s2 -= carry[2] << 21 - carry[3] = s3 >> 21 - s4 += carry[3] - s3 -= carry[3] << 21 - carry[4] = s4 >> 21 - s5 += carry[4] - s4 -= carry[4] << 21 - carry[5] = s5 >> 21 - s6 += carry[5] - s5 -= carry[5] << 21 - carry[6] = s6 >> 21 - s7 += carry[6] - s6 -= carry[6] << 21 - carry[7] = s7 >> 21 - s8 += carry[7] - s7 -= carry[7] << 21 - carry[8] = s8 >> 21 - s9 += carry[8] - s8 -= carry[8] << 21 - carry[9] = s9 >> 21 - s10 += carry[9] - s9 -= carry[9] << 21 - carry[10] = s10 >> 21 - s11 += carry[10] - s10 -= carry[10] << 21 - - out[0] = byte(s0 >> 0) - out[1] = byte(s0 >> 8) - out[2] = byte((s0 >> 16) | (s1 << 5)) - out[3] = byte(s1 >> 3) - out[4] = byte(s1 >> 11) - out[5] = byte((s1 >> 19) | (s2 << 2)) - out[6] = byte(s2 >> 6) - out[7] = byte((s2 >> 14) | (s3 << 7)) - out[8] = byte(s3 >> 1) - out[9] = byte(s3 >> 9) - out[10] = byte((s3 >> 17) | (s4 << 4)) - out[11] = byte(s4 >> 4) - out[12] = byte(s4 >> 12) - out[13] = byte((s4 >> 20) | (s5 << 1)) - out[14] = byte(s5 >> 7) - out[15] = byte((s5 >> 15) | (s6 << 6)) - out[16] = byte(s6 >> 2) - out[17] = byte(s6 >> 10) - out[18] = byte((s6 >> 18) | (s7 << 3)) - out[19] = byte(s7 >> 5) - out[20] = byte(s7 >> 13) - out[21] = byte(s8 >> 0) - out[22] = byte(s8 >> 8) - out[23] = byte((s8 >> 16) | (s9 << 5)) - out[24] = byte(s9 >> 3) - out[25] = byte(s9 >> 11) - out[26] = byte((s9 >> 19) | (s10 << 2)) - out[27] = byte(s10 >> 6) - out[28] = byte((s10 >> 14) | (s11 << 7)) - out[29] = byte(s11 >> 1) - out[30] = byte(s11 >> 9) - out[31] = byte(s11 >> 17) -} diff --git a/vendor/golang.org/x/net/internal/timeseries/timeseries.go b/vendor/golang.org/x/net/internal/timeseries/timeseries.go deleted file mode 100644 index 1119f3448..000000000 --- a/vendor/golang.org/x/net/internal/timeseries/timeseries.go +++ /dev/null @@ -1,525 +0,0 @@ -// Copyright 2015 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Package timeseries implements a time series structure for stats collection. -package timeseries // import "golang.org/x/net/internal/timeseries" - -import ( - "fmt" - "log" - "time" -) - -const ( - timeSeriesNumBuckets = 64 - minuteHourSeriesNumBuckets = 60 -) - -var timeSeriesResolutions = []time.Duration{ - 1 * time.Second, - 10 * time.Second, - 1 * time.Minute, - 10 * time.Minute, - 1 * time.Hour, - 6 * time.Hour, - 24 * time.Hour, // 1 day - 7 * 24 * time.Hour, // 1 week - 4 * 7 * 24 * time.Hour, // 4 weeks - 16 * 7 * 24 * time.Hour, // 16 weeks -} - -var minuteHourSeriesResolutions = []time.Duration{ - 1 * time.Second, - 1 * time.Minute, -} - -// An Observable is a kind of data that can be aggregated in a time series. -type Observable interface { - Multiply(ratio float64) // Multiplies the data in self by a given ratio - Add(other Observable) // Adds the data from a different observation to self - Clear() // Clears the observation so it can be reused. - CopyFrom(other Observable) // Copies the contents of a given observation to self -} - -// Float attaches the methods of Observable to a float64. -type Float float64 - -// NewFloat returns a Float. -func NewFloat() Observable { - f := Float(0) - return &f -} - -// String returns the float as a string. -func (f *Float) String() string { return fmt.Sprintf("%g", f.Value()) } - -// Value returns the float's value. -func (f *Float) Value() float64 { return float64(*f) } - -func (f *Float) Multiply(ratio float64) { *f *= Float(ratio) } - -func (f *Float) Add(other Observable) { - o := other.(*Float) - *f += *o -} - -func (f *Float) Clear() { *f = 0 } - -func (f *Float) CopyFrom(other Observable) { - o := other.(*Float) - *f = *o -} - -// A Clock tells the current time. -type Clock interface { - Time() time.Time -} - -type defaultClock int - -var defaultClockInstance defaultClock - -func (defaultClock) Time() time.Time { return time.Now() } - -// Information kept per level. Each level consists of a circular list of -// observations. The start of the level may be derived from end and the -// len(buckets) * sizeInMillis. -type tsLevel struct { - oldest int // index to oldest bucketed Observable - newest int // index to newest bucketed Observable - end time.Time // end timestamp for this level - size time.Duration // duration of the bucketed Observable - buckets []Observable // collections of observations - provider func() Observable // used for creating new Observable -} - -func (l *tsLevel) Clear() { - l.oldest = 0 - l.newest = len(l.buckets) - 1 - l.end = time.Time{} - for i := range l.buckets { - if l.buckets[i] != nil { - l.buckets[i].Clear() - l.buckets[i] = nil - } - } -} - -func (l *tsLevel) InitLevel(size time.Duration, numBuckets int, f func() Observable) { - l.size = size - l.provider = f - l.buckets = make([]Observable, numBuckets) -} - -// Keeps a sequence of levels. Each level is responsible for storing data at -// a given resolution. For example, the first level stores data at a one -// minute resolution while the second level stores data at a one hour -// resolution. - -// Each level is represented by a sequence of buckets. Each bucket spans an -// interval equal to the resolution of the level. New observations are added -// to the last bucket. -type timeSeries struct { - provider func() Observable // make more Observable - numBuckets int // number of buckets in each level - levels []*tsLevel // levels of bucketed Observable - lastAdd time.Time // time of last Observable tracked - total Observable // convenient aggregation of all Observable - clock Clock // Clock for getting current time - pending Observable // observations not yet bucketed - pendingTime time.Time // what time are we keeping in pending - dirty bool // if there are pending observations -} - -// init initializes a level according to the supplied criteria. -func (ts *timeSeries) init(resolutions []time.Duration, f func() Observable, numBuckets int, clock Clock) { - ts.provider = f - ts.numBuckets = numBuckets - ts.clock = clock - ts.levels = make([]*tsLevel, len(resolutions)) - - for i := range resolutions { - if i > 0 && resolutions[i-1] >= resolutions[i] { - log.Print("timeseries: resolutions must be monotonically increasing") - break - } - newLevel := new(tsLevel) - newLevel.InitLevel(resolutions[i], ts.numBuckets, ts.provider) - ts.levels[i] = newLevel - } - - ts.Clear() -} - -// Clear removes all observations from the time series. -func (ts *timeSeries) Clear() { - ts.lastAdd = time.Time{} - ts.total = ts.resetObservation(ts.total) - ts.pending = ts.resetObservation(ts.pending) - ts.pendingTime = time.Time{} - ts.dirty = false - - for i := range ts.levels { - ts.levels[i].Clear() - } -} - -// Add records an observation at the current time. -func (ts *timeSeries) Add(observation Observable) { - ts.AddWithTime(observation, ts.clock.Time()) -} - -// AddWithTime records an observation at the specified time. -func (ts *timeSeries) AddWithTime(observation Observable, t time.Time) { - - smallBucketDuration := ts.levels[0].size - - if t.After(ts.lastAdd) { - ts.lastAdd = t - } - - if t.After(ts.pendingTime) { - ts.advance(t) - ts.mergePendingUpdates() - ts.pendingTime = ts.levels[0].end - ts.pending.CopyFrom(observation) - ts.dirty = true - } else if t.After(ts.pendingTime.Add(-1 * smallBucketDuration)) { - // The observation is close enough to go into the pending bucket. - // This compensates for clock skewing and small scheduling delays - // by letting the update stay in the fast path. - ts.pending.Add(observation) - ts.dirty = true - } else { - ts.mergeValue(observation, t) - } -} - -// mergeValue inserts the observation at the specified time in the past into all levels. -func (ts *timeSeries) mergeValue(observation Observable, t time.Time) { - for _, level := range ts.levels { - index := (ts.numBuckets - 1) - int(level.end.Sub(t)/level.size) - if 0 <= index && index < ts.numBuckets { - bucketNumber := (level.oldest + index) % ts.numBuckets - if level.buckets[bucketNumber] == nil { - level.buckets[bucketNumber] = level.provider() - } - level.buckets[bucketNumber].Add(observation) - } - } - ts.total.Add(observation) -} - -// mergePendingUpdates applies the pending updates into all levels. -func (ts *timeSeries) mergePendingUpdates() { - if ts.dirty { - ts.mergeValue(ts.pending, ts.pendingTime) - ts.pending = ts.resetObservation(ts.pending) - ts.dirty = false - } -} - -// advance cycles the buckets at each level until the latest bucket in -// each level can hold the time specified. -func (ts *timeSeries) advance(t time.Time) { - if !t.After(ts.levels[0].end) { - return - } - for i := 0; i < len(ts.levels); i++ { - level := ts.levels[i] - if !level.end.Before(t) { - break - } - - // If the time is sufficiently far, just clear the level and advance - // directly. - if !t.Before(level.end.Add(level.size * time.Duration(ts.numBuckets))) { - for _, b := range level.buckets { - ts.resetObservation(b) - } - level.end = time.Unix(0, (t.UnixNano()/level.size.Nanoseconds())*level.size.Nanoseconds()) - } - - for t.After(level.end) { - level.end = level.end.Add(level.size) - level.newest = level.oldest - level.oldest = (level.oldest + 1) % ts.numBuckets - ts.resetObservation(level.buckets[level.newest]) - } - - t = level.end - } -} - -// Latest returns the sum of the num latest buckets from the level. -func (ts *timeSeries) Latest(level, num int) Observable { - now := ts.clock.Time() - if ts.levels[0].end.Before(now) { - ts.advance(now) - } - - ts.mergePendingUpdates() - - result := ts.provider() - l := ts.levels[level] - index := l.newest - - for i := 0; i < num; i++ { - if l.buckets[index] != nil { - result.Add(l.buckets[index]) - } - if index == 0 { - index = ts.numBuckets - } - index-- - } - - return result -} - -// LatestBuckets returns a copy of the num latest buckets from level. -func (ts *timeSeries) LatestBuckets(level, num int) []Observable { - if level < 0 || level > len(ts.levels) { - log.Print("timeseries: bad level argument: ", level) - return nil - } - if num < 0 || num >= ts.numBuckets { - log.Print("timeseries: bad num argument: ", num) - return nil - } - - results := make([]Observable, num) - now := ts.clock.Time() - if ts.levels[0].end.Before(now) { - ts.advance(now) - } - - ts.mergePendingUpdates() - - l := ts.levels[level] - index := l.newest - - for i := 0; i < num; i++ { - result := ts.provider() - results[i] = result - if l.buckets[index] != nil { - result.CopyFrom(l.buckets[index]) - } - - if index == 0 { - index = ts.numBuckets - } - index -= 1 - } - return results -} - -// ScaleBy updates observations by scaling by factor. -func (ts *timeSeries) ScaleBy(factor float64) { - for _, l := range ts.levels { - for i := 0; i < ts.numBuckets; i++ { - l.buckets[i].Multiply(factor) - } - } - - ts.total.Multiply(factor) - ts.pending.Multiply(factor) -} - -// Range returns the sum of observations added over the specified time range. -// If start or finish times don't fall on bucket boundaries of the same -// level, then return values are approximate answers. -func (ts *timeSeries) Range(start, finish time.Time) Observable { - return ts.ComputeRange(start, finish, 1)[0] -} - -// Recent returns the sum of observations from the last delta. -func (ts *timeSeries) Recent(delta time.Duration) Observable { - now := ts.clock.Time() - return ts.Range(now.Add(-delta), now) -} - -// Total returns the total of all observations. -func (ts *timeSeries) Total() Observable { - ts.mergePendingUpdates() - return ts.total -} - -// ComputeRange computes a specified number of values into a slice using -// the observations recorded over the specified time period. The return -// values are approximate if the start or finish times don't fall on the -// bucket boundaries at the same level or if the number of buckets spanning -// the range is not an integral multiple of num. -func (ts *timeSeries) ComputeRange(start, finish time.Time, num int) []Observable { - if start.After(finish) { - log.Printf("timeseries: start > finish, %v>%v", start, finish) - return nil - } - - if num < 0 { - log.Printf("timeseries: num < 0, %v", num) - return nil - } - - results := make([]Observable, num) - - for _, l := range ts.levels { - if !start.Before(l.end.Add(-l.size * time.Duration(ts.numBuckets))) { - ts.extract(l, start, finish, num, results) - return results - } - } - - // Failed to find a level that covers the desired range. So just - // extract from the last level, even if it doesn't cover the entire - // desired range. - ts.extract(ts.levels[len(ts.levels)-1], start, finish, num, results) - - return results -} - -// RecentList returns the specified number of values in slice over the most -// recent time period of the specified range. -func (ts *timeSeries) RecentList(delta time.Duration, num int) []Observable { - if delta < 0 { - return nil - } - now := ts.clock.Time() - return ts.ComputeRange(now.Add(-delta), now, num) -} - -// extract returns a slice of specified number of observations from a given -// level over a given range. -func (ts *timeSeries) extract(l *tsLevel, start, finish time.Time, num int, results []Observable) { - ts.mergePendingUpdates() - - srcInterval := l.size - dstInterval := finish.Sub(start) / time.Duration(num) - dstStart := start - srcStart := l.end.Add(-srcInterval * time.Duration(ts.numBuckets)) - - srcIndex := 0 - - // Where should scanning start? - if dstStart.After(srcStart) { - advance := dstStart.Sub(srcStart) / srcInterval - srcIndex += int(advance) - srcStart = srcStart.Add(advance * srcInterval) - } - - // The i'th value is computed as show below. - // interval = (finish/start)/num - // i'th value = sum of observation in range - // [ start + i * interval, - // start + (i + 1) * interval ) - for i := 0; i < num; i++ { - results[i] = ts.resetObservation(results[i]) - dstEnd := dstStart.Add(dstInterval) - for srcIndex < ts.numBuckets && srcStart.Before(dstEnd) { - srcEnd := srcStart.Add(srcInterval) - if srcEnd.After(ts.lastAdd) { - srcEnd = ts.lastAdd - } - - if !srcEnd.Before(dstStart) { - srcValue := l.buckets[(srcIndex+l.oldest)%ts.numBuckets] - if !srcStart.Before(dstStart) && !srcEnd.After(dstEnd) { - // dst completely contains src. - if srcValue != nil { - results[i].Add(srcValue) - } - } else { - // dst partially overlaps src. - overlapStart := maxTime(srcStart, dstStart) - overlapEnd := minTime(srcEnd, dstEnd) - base := srcEnd.Sub(srcStart) - fraction := overlapEnd.Sub(overlapStart).Seconds() / base.Seconds() - - used := ts.provider() - if srcValue != nil { - used.CopyFrom(srcValue) - } - used.Multiply(fraction) - results[i].Add(used) - } - - if srcEnd.After(dstEnd) { - break - } - } - srcIndex++ - srcStart = srcStart.Add(srcInterval) - } - dstStart = dstStart.Add(dstInterval) - } -} - -// resetObservation clears the content so the struct may be reused. -func (ts *timeSeries) resetObservation(observation Observable) Observable { - if observation == nil { - observation = ts.provider() - } else { - observation.Clear() - } - return observation -} - -// TimeSeries tracks data at granularities from 1 second to 16 weeks. -type TimeSeries struct { - timeSeries -} - -// NewTimeSeries creates a new TimeSeries using the function provided for creating new Observable. -func NewTimeSeries(f func() Observable) *TimeSeries { - return NewTimeSeriesWithClock(f, defaultClockInstance) -} - -// NewTimeSeriesWithClock creates a new TimeSeries using the function provided for creating new Observable and the clock for -// assigning timestamps. -func NewTimeSeriesWithClock(f func() Observable, clock Clock) *TimeSeries { - ts := new(TimeSeries) - ts.timeSeries.init(timeSeriesResolutions, f, timeSeriesNumBuckets, clock) - return ts -} - -// MinuteHourSeries tracks data at granularities of 1 minute and 1 hour. -type MinuteHourSeries struct { - timeSeries -} - -// NewMinuteHourSeries creates a new MinuteHourSeries using the function provided for creating new Observable. -func NewMinuteHourSeries(f func() Observable) *MinuteHourSeries { - return NewMinuteHourSeriesWithClock(f, defaultClockInstance) -} - -// NewMinuteHourSeriesWithClock creates a new MinuteHourSeries using the function provided for creating new Observable and the clock for -// assigning timestamps. -func NewMinuteHourSeriesWithClock(f func() Observable, clock Clock) *MinuteHourSeries { - ts := new(MinuteHourSeries) - ts.timeSeries.init(minuteHourSeriesResolutions, f, - minuteHourSeriesNumBuckets, clock) - return ts -} - -func (ts *MinuteHourSeries) Minute() Observable { - return ts.timeSeries.Latest(0, 60) -} - -func (ts *MinuteHourSeries) Hour() Observable { - return ts.timeSeries.Latest(1, 60) -} - -func minTime(a, b time.Time) time.Time { - if a.Before(b) { - return a - } - return b -} - -func maxTime(a, b time.Time) time.Time { - if a.After(b) { - return a - } - return b -} diff --git a/vendor/golang.org/x/net/trace/events.go b/vendor/golang.org/x/net/trace/events.go deleted file mode 100644 index d8daec1a7..000000000 --- a/vendor/golang.org/x/net/trace/events.go +++ /dev/null @@ -1,532 +0,0 @@ -// Copyright 2015 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package trace - -import ( - "bytes" - "fmt" - "html/template" - "io" - "log" - "net/http" - "runtime" - "sort" - "strconv" - "strings" - "sync" - "sync/atomic" - "text/tabwriter" - "time" -) - -const maxEventsPerLog = 100 - -type bucket struct { - MaxErrAge time.Duration - String string -} - -var buckets = []bucket{ - {0, "total"}, - {10 * time.Second, "errs<10s"}, - {1 * time.Minute, "errs<1m"}, - {10 * time.Minute, "errs<10m"}, - {1 * time.Hour, "errs<1h"}, - {10 * time.Hour, "errs<10h"}, - {24000 * time.Hour, "errors"}, -} - -// RenderEvents renders the HTML page typically served at /debug/events. -// It does not do any auth checking; see AuthRequest for the default auth check -// used by the handler registered on http.DefaultServeMux. -// req may be nil. -func RenderEvents(w http.ResponseWriter, req *http.Request, sensitive bool) { - now := time.Now() - data := &struct { - Families []string // family names - Buckets []bucket - Counts [][]int // eventLog count per family/bucket - - // Set when a bucket has been selected. - Family string - Bucket int - EventLogs eventLogs - Expanded bool - }{ - Buckets: buckets, - } - - data.Families = make([]string, 0, len(families)) - famMu.RLock() - for name := range families { - data.Families = append(data.Families, name) - } - famMu.RUnlock() - sort.Strings(data.Families) - - // Count the number of eventLogs in each family for each error age. - data.Counts = make([][]int, len(data.Families)) - for i, name := range data.Families { - // TODO(sameer): move this loop under the family lock. - f := getEventFamily(name) - data.Counts[i] = make([]int, len(data.Buckets)) - for j, b := range data.Buckets { - data.Counts[i][j] = f.Count(now, b.MaxErrAge) - } - } - - if req != nil { - var ok bool - data.Family, data.Bucket, ok = parseEventsArgs(req) - if !ok { - // No-op - } else { - data.EventLogs = getEventFamily(data.Family).Copy(now, buckets[data.Bucket].MaxErrAge) - } - if data.EventLogs != nil { - defer data.EventLogs.Free() - sort.Sort(data.EventLogs) - } - if exp, err := strconv.ParseBool(req.FormValue("exp")); err == nil { - data.Expanded = exp - } - } - - famMu.RLock() - defer famMu.RUnlock() - if err := eventsTmpl().Execute(w, data); err != nil { - log.Printf("net/trace: Failed executing template: %v", err) - } -} - -func parseEventsArgs(req *http.Request) (fam string, b int, ok bool) { - fam, bStr := req.FormValue("fam"), req.FormValue("b") - if fam == "" || bStr == "" { - return "", 0, false - } - b, err := strconv.Atoi(bStr) - if err != nil || b < 0 || b >= len(buckets) { - return "", 0, false - } - return fam, b, true -} - -// An EventLog provides a log of events associated with a specific object. -type EventLog interface { - // Printf formats its arguments with fmt.Sprintf and adds the - // result to the event log. - Printf(format string, a ...interface{}) - - // Errorf is like Printf, but it marks this event as an error. - Errorf(format string, a ...interface{}) - - // Finish declares that this event log is complete. - // The event log should not be used after calling this method. - Finish() -} - -// NewEventLog returns a new EventLog with the specified family name -// and title. -func NewEventLog(family, title string) EventLog { - el := newEventLog() - el.ref() - el.Family, el.Title = family, title - el.Start = time.Now() - el.events = make([]logEntry, 0, maxEventsPerLog) - el.stack = make([]uintptr, 32) - n := runtime.Callers(2, el.stack) - el.stack = el.stack[:n] - - getEventFamily(family).add(el) - return el -} - -func (el *eventLog) Finish() { - getEventFamily(el.Family).remove(el) - el.unref() // matches ref in New -} - -var ( - famMu sync.RWMutex - families = make(map[string]*eventFamily) // family name => family -) - -func getEventFamily(fam string) *eventFamily { - famMu.Lock() - defer famMu.Unlock() - f := families[fam] - if f == nil { - f = &eventFamily{} - families[fam] = f - } - return f -} - -type eventFamily struct { - mu sync.RWMutex - eventLogs eventLogs -} - -func (f *eventFamily) add(el *eventLog) { - f.mu.Lock() - f.eventLogs = append(f.eventLogs, el) - f.mu.Unlock() -} - -func (f *eventFamily) remove(el *eventLog) { - f.mu.Lock() - defer f.mu.Unlock() - for i, el0 := range f.eventLogs { - if el == el0 { - copy(f.eventLogs[i:], f.eventLogs[i+1:]) - f.eventLogs = f.eventLogs[:len(f.eventLogs)-1] - return - } - } -} - -func (f *eventFamily) Count(now time.Time, maxErrAge time.Duration) (n int) { - f.mu.RLock() - defer f.mu.RUnlock() - for _, el := range f.eventLogs { - if el.hasRecentError(now, maxErrAge) { - n++ - } - } - return -} - -func (f *eventFamily) Copy(now time.Time, maxErrAge time.Duration) (els eventLogs) { - f.mu.RLock() - defer f.mu.RUnlock() - els = make(eventLogs, 0, len(f.eventLogs)) - for _, el := range f.eventLogs { - if el.hasRecentError(now, maxErrAge) { - el.ref() - els = append(els, el) - } - } - return -} - -type eventLogs []*eventLog - -// Free calls unref on each element of the list. -func (els eventLogs) Free() { - for _, el := range els { - el.unref() - } -} - -// eventLogs may be sorted in reverse chronological order. -func (els eventLogs) Len() int { return len(els) } -func (els eventLogs) Less(i, j int) bool { return els[i].Start.After(els[j].Start) } -func (els eventLogs) Swap(i, j int) { els[i], els[j] = els[j], els[i] } - -// A logEntry is a timestamped log entry in an event log. -type logEntry struct { - When time.Time - Elapsed time.Duration // since previous event in log - NewDay bool // whether this event is on a different day to the previous event - What string - IsErr bool -} - -// WhenString returns a string representation of the elapsed time of the event. -// It will include the date if midnight was crossed. -func (e logEntry) WhenString() string { - if e.NewDay { - return e.When.Format("2006/01/02 15:04:05.000000") - } - return e.When.Format("15:04:05.000000") -} - -// An eventLog represents an active event log. -type eventLog struct { - // Family is the top-level grouping of event logs to which this belongs. - Family string - - // Title is the title of this event log. - Title string - - // Timing information. - Start time.Time - - // Call stack where this event log was created. - stack []uintptr - - // Append-only sequence of events. - // - // TODO(sameer): change this to a ring buffer to avoid the array copy - // when we hit maxEventsPerLog. - mu sync.RWMutex - events []logEntry - LastErrorTime time.Time - discarded int - - refs int32 // how many buckets this is in -} - -func (el *eventLog) reset() { - // Clear all but the mutex. Mutexes may not be copied, even when unlocked. - el.Family = "" - el.Title = "" - el.Start = time.Time{} - el.stack = nil - el.events = nil - el.LastErrorTime = time.Time{} - el.discarded = 0 - el.refs = 0 -} - -func (el *eventLog) hasRecentError(now time.Time, maxErrAge time.Duration) bool { - if maxErrAge == 0 { - return true - } - el.mu.RLock() - defer el.mu.RUnlock() - return now.Sub(el.LastErrorTime) < maxErrAge -} - -// delta returns the elapsed time since the last event or the log start, -// and whether it spans midnight. -// L >= el.mu -func (el *eventLog) delta(t time.Time) (time.Duration, bool) { - if len(el.events) == 0 { - return t.Sub(el.Start), false - } - prev := el.events[len(el.events)-1].When - return t.Sub(prev), prev.Day() != t.Day() - -} - -func (el *eventLog) Printf(format string, a ...interface{}) { - el.printf(false, format, a...) -} - -func (el *eventLog) Errorf(format string, a ...interface{}) { - el.printf(true, format, a...) -} - -func (el *eventLog) printf(isErr bool, format string, a ...interface{}) { - e := logEntry{When: time.Now(), IsErr: isErr, What: fmt.Sprintf(format, a...)} - el.mu.Lock() - e.Elapsed, e.NewDay = el.delta(e.When) - if len(el.events) < maxEventsPerLog { - el.events = append(el.events, e) - } else { - // Discard the oldest event. - if el.discarded == 0 { - // el.discarded starts at two to count for the event it - // is replacing, plus the next one that we are about to - // drop. - el.discarded = 2 - } else { - el.discarded++ - } - // TODO(sameer): if this causes allocations on a critical path, - // change eventLog.What to be a fmt.Stringer, as in trace.go. - el.events[0].What = fmt.Sprintf("(%d events discarded)", el.discarded) - // The timestamp of the discarded meta-event should be - // the time of the last event it is representing. - el.events[0].When = el.events[1].When - copy(el.events[1:], el.events[2:]) - el.events[maxEventsPerLog-1] = e - } - if e.IsErr { - el.LastErrorTime = e.When - } - el.mu.Unlock() -} - -func (el *eventLog) ref() { - atomic.AddInt32(&el.refs, 1) -} - -func (el *eventLog) unref() { - if atomic.AddInt32(&el.refs, -1) == 0 { - freeEventLog(el) - } -} - -func (el *eventLog) When() string { - return el.Start.Format("2006/01/02 15:04:05.000000") -} - -func (el *eventLog) ElapsedTime() string { - elapsed := time.Since(el.Start) - return fmt.Sprintf("%.6f", elapsed.Seconds()) -} - -func (el *eventLog) Stack() string { - buf := new(bytes.Buffer) - tw := tabwriter.NewWriter(buf, 1, 8, 1, '\t', 0) - printStackRecord(tw, el.stack) - tw.Flush() - return buf.String() -} - -// printStackRecord prints the function + source line information -// for a single stack trace. -// Adapted from runtime/pprof/pprof.go. -func printStackRecord(w io.Writer, stk []uintptr) { - for _, pc := range stk { - f := runtime.FuncForPC(pc) - if f == nil { - continue - } - file, line := f.FileLine(pc) - name := f.Name() - // Hide runtime.goexit and any runtime functions at the beginning. - if strings.HasPrefix(name, "runtime.") { - continue - } - fmt.Fprintf(w, "# %s\t%s:%d\n", name, file, line) - } -} - -func (el *eventLog) Events() []logEntry { - el.mu.RLock() - defer el.mu.RUnlock() - return el.events -} - -// freeEventLogs is a freelist of *eventLog -var freeEventLogs = make(chan *eventLog, 1000) - -// newEventLog returns a event log ready to use. -func newEventLog() *eventLog { - select { - case el := <-freeEventLogs: - return el - default: - return new(eventLog) - } -} - -// freeEventLog adds el to freeEventLogs if there's room. -// This is non-blocking. -func freeEventLog(el *eventLog) { - el.reset() - select { - case freeEventLogs <- el: - default: - } -} - -var eventsTmplCache *template.Template -var eventsTmplOnce sync.Once - -func eventsTmpl() *template.Template { - eventsTmplOnce.Do(func() { - eventsTmplCache = template.Must(template.New("events").Funcs(template.FuncMap{ - "elapsed": elapsed, - "trimSpace": strings.TrimSpace, - }).Parse(eventsHTML)) - }) - return eventsTmplCache -} - -const eventsHTML = ` -<html> - <head> - <title>events</title> - </head> - <style type="text/css"> - body { - font-family: sans-serif; - } - table#req-status td.family { - padding-right: 2em; - } - table#req-status td.active { - padding-right: 1em; - } - table#req-status td.empty { - color: #aaa; - } - table#reqs { - margin-top: 1em; - } - table#reqs tr.first { - {{if $.Expanded}}font-weight: bold;{{end}} - } - table#reqs td { - font-family: monospace; - } - table#reqs td.when { - text-align: right; - white-space: nowrap; - } - table#reqs td.elapsed { - padding: 0 0.5em; - text-align: right; - white-space: pre; - width: 10em; - } - address { - font-size: smaller; - margin-top: 5em; - } - </style> - <body> - -<h1>/debug/events</h1> - -<table id="req-status"> - {{range $i, $fam := .Families}} - <tr> - <td class="family">{{$fam}}</td> - - {{range $j, $bucket := $.Buckets}} - {{$n := index $.Counts $i $j}} - <td class="{{if not $bucket.MaxErrAge}}active{{end}}{{if not $n}}empty{{end}}"> - {{if $n}}<a href="?fam={{$fam}}&b={{$j}}{{if $.Expanded}}&exp=1{{end}}">{{end}} - [{{$n}} {{$bucket.String}}] - {{if $n}}</a>{{end}} - </td> - {{end}} - - </tr>{{end}} -</table> - -{{if $.EventLogs}} -<hr /> -<h3>Family: {{$.Family}}</h3> - -{{if $.Expanded}}<a href="?fam={{$.Family}}&b={{$.Bucket}}">{{end}} -[Summary]{{if $.Expanded}}</a>{{end}} - -{{if not $.Expanded}}<a href="?fam={{$.Family}}&b={{$.Bucket}}&exp=1">{{end}} -[Expanded]{{if not $.Expanded}}</a>{{end}} - -<table id="reqs"> - <tr><th>When</th><th>Elapsed</th></tr> - {{range $el := $.EventLogs}} - <tr class="first"> - <td class="when">{{$el.When}}</td> - <td class="elapsed">{{$el.ElapsedTime}}</td> - <td>{{$el.Title}} - </tr> - {{if $.Expanded}} - <tr> - <td class="when"></td> - <td class="elapsed"></td> - <td><pre>{{$el.Stack|trimSpace}}</pre></td> - </tr> - {{range $el.Events}} - <tr> - <td class="when">{{.WhenString}}</td> - <td class="elapsed">{{elapsed .Elapsed}}</td> - <td>.{{if .IsErr}}E{{else}}.{{end}}. {{.What}}</td> - </tr> - {{end}} - {{end}} - {{end}} -</table> -{{end}} - </body> -</html> -` diff --git a/vendor/golang.org/x/net/trace/histogram.go b/vendor/golang.org/x/net/trace/histogram.go deleted file mode 100644 index 9bf4286c7..000000000 --- a/vendor/golang.org/x/net/trace/histogram.go +++ /dev/null @@ -1,365 +0,0 @@ -// Copyright 2015 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package trace - -// This file implements histogramming for RPC statistics collection. - -import ( - "bytes" - "fmt" - "html/template" - "log" - "math" - "sync" - - "golang.org/x/net/internal/timeseries" -) - -const ( - bucketCount = 38 -) - -// histogram keeps counts of values in buckets that are spaced -// out in powers of 2: 0-1, 2-3, 4-7... -// histogram implements timeseries.Observable -type histogram struct { - sum int64 // running total of measurements - sumOfSquares float64 // square of running total - buckets []int64 // bucketed values for histogram - value int // holds a single value as an optimization - valueCount int64 // number of values recorded for single value -} - -// AddMeasurement records a value measurement observation to the histogram. -func (h *histogram) addMeasurement(value int64) { - // TODO: assert invariant - h.sum += value - h.sumOfSquares += float64(value) * float64(value) - - bucketIndex := getBucket(value) - - if h.valueCount == 0 || (h.valueCount > 0 && h.value == bucketIndex) { - h.value = bucketIndex - h.valueCount++ - } else { - h.allocateBuckets() - h.buckets[bucketIndex]++ - } -} - -func (h *histogram) allocateBuckets() { - if h.buckets == nil { - h.buckets = make([]int64, bucketCount) - h.buckets[h.value] = h.valueCount - h.value = 0 - h.valueCount = -1 - } -} - -func log2(i int64) int { - n := 0 - for ; i >= 0x100; i >>= 8 { - n += 8 - } - for ; i > 0; i >>= 1 { - n += 1 - } - return n -} - -func getBucket(i int64) (index int) { - index = log2(i) - 1 - if index < 0 { - index = 0 - } - if index >= bucketCount { - index = bucketCount - 1 - } - return -} - -// Total returns the number of recorded observations. -func (h *histogram) total() (total int64) { - if h.valueCount >= 0 { - total = h.valueCount - } - for _, val := range h.buckets { - total += int64(val) - } - return -} - -// Average returns the average value of recorded observations. -func (h *histogram) average() float64 { - t := h.total() - if t == 0 { - return 0 - } - return float64(h.sum) / float64(t) -} - -// Variance returns the variance of recorded observations. -func (h *histogram) variance() float64 { - t := float64(h.total()) - if t == 0 { - return 0 - } - s := float64(h.sum) / t - return h.sumOfSquares/t - s*s -} - -// StandardDeviation returns the standard deviation of recorded observations. -func (h *histogram) standardDeviation() float64 { - return math.Sqrt(h.variance()) -} - -// PercentileBoundary estimates the value that the given fraction of recorded -// observations are less than. -func (h *histogram) percentileBoundary(percentile float64) int64 { - total := h.total() - - // Corner cases (make sure result is strictly less than Total()) - if total == 0 { - return 0 - } else if total == 1 { - return int64(h.average()) - } - - percentOfTotal := round(float64(total) * percentile) - var runningTotal int64 - - for i := range h.buckets { - value := h.buckets[i] - runningTotal += value - if runningTotal == percentOfTotal { - // We hit an exact bucket boundary. If the next bucket has data, it is a - // good estimate of the value. If the bucket is empty, we interpolate the - // midpoint between the next bucket's boundary and the next non-zero - // bucket. If the remaining buckets are all empty, then we use the - // boundary for the next bucket as the estimate. - j := uint8(i + 1) - min := bucketBoundary(j) - if runningTotal < total { - for h.buckets[j] == 0 { - j++ - } - } - max := bucketBoundary(j) - return min + round(float64(max-min)/2) - } else if runningTotal > percentOfTotal { - // The value is in this bucket. Interpolate the value. - delta := runningTotal - percentOfTotal - percentBucket := float64(value-delta) / float64(value) - bucketMin := bucketBoundary(uint8(i)) - nextBucketMin := bucketBoundary(uint8(i + 1)) - bucketSize := nextBucketMin - bucketMin - return bucketMin + round(percentBucket*float64(bucketSize)) - } - } - return bucketBoundary(bucketCount - 1) -} - -// Median returns the estimated median of the observed values. -func (h *histogram) median() int64 { - return h.percentileBoundary(0.5) -} - -// Add adds other to h. -func (h *histogram) Add(other timeseries.Observable) { - o := other.(*histogram) - if o.valueCount == 0 { - // Other histogram is empty - } else if h.valueCount >= 0 && o.valueCount > 0 && h.value == o.value { - // Both have a single bucketed value, aggregate them - h.valueCount += o.valueCount - } else { - // Two different values necessitate buckets in this histogram - h.allocateBuckets() - if o.valueCount >= 0 { - h.buckets[o.value] += o.valueCount - } else { - for i := range h.buckets { - h.buckets[i] += o.buckets[i] - } - } - } - h.sumOfSquares += o.sumOfSquares - h.sum += o.sum -} - -// Clear resets the histogram to an empty state, removing all observed values. -func (h *histogram) Clear() { - h.buckets = nil - h.value = 0 - h.valueCount = 0 - h.sum = 0 - h.sumOfSquares = 0 -} - -// CopyFrom copies from other, which must be a *histogram, into h. -func (h *histogram) CopyFrom(other timeseries.Observable) { - o := other.(*histogram) - if o.valueCount == -1 { - h.allocateBuckets() - copy(h.buckets, o.buckets) - } - h.sum = o.sum - h.sumOfSquares = o.sumOfSquares - h.value = o.value - h.valueCount = o.valueCount -} - -// Multiply scales the histogram by the specified ratio. -func (h *histogram) Multiply(ratio float64) { - if h.valueCount == -1 { - for i := range h.buckets { - h.buckets[i] = int64(float64(h.buckets[i]) * ratio) - } - } else { - h.valueCount = int64(float64(h.valueCount) * ratio) - } - h.sum = int64(float64(h.sum) * ratio) - h.sumOfSquares = h.sumOfSquares * ratio -} - -// New creates a new histogram. -func (h *histogram) New() timeseries.Observable { - r := new(histogram) - r.Clear() - return r -} - -func (h *histogram) String() string { - return fmt.Sprintf("%d, %f, %d, %d, %v", - h.sum, h.sumOfSquares, h.value, h.valueCount, h.buckets) -} - -// round returns the closest int64 to the argument -func round(in float64) int64 { - return int64(math.Floor(in + 0.5)) -} - -// bucketBoundary returns the first value in the bucket. -func bucketBoundary(bucket uint8) int64 { - if bucket == 0 { - return 0 - } - return 1 << bucket -} - -// bucketData holds data about a specific bucket for use in distTmpl. -type bucketData struct { - Lower, Upper int64 - N int64 - Pct, CumulativePct float64 - GraphWidth int -} - -// data holds data about a Distribution for use in distTmpl. -type data struct { - Buckets []*bucketData - Count, Median int64 - Mean, StandardDeviation float64 -} - -// maxHTMLBarWidth is the maximum width of the HTML bar for visualizing buckets. -const maxHTMLBarWidth = 350.0 - -// newData returns data representing h for use in distTmpl. -func (h *histogram) newData() *data { - // Force the allocation of buckets to simplify the rendering implementation - h.allocateBuckets() - // We scale the bars on the right so that the largest bar is - // maxHTMLBarWidth pixels in width. - maxBucket := int64(0) - for _, n := range h.buckets { - if n > maxBucket { - maxBucket = n - } - } - total := h.total() - barsizeMult := maxHTMLBarWidth / float64(maxBucket) - var pctMult float64 - if total == 0 { - pctMult = 1.0 - } else { - pctMult = 100.0 / float64(total) - } - - buckets := make([]*bucketData, len(h.buckets)) - runningTotal := int64(0) - for i, n := range h.buckets { - if n == 0 { - continue - } - runningTotal += n - var upperBound int64 - if i < bucketCount-1 { - upperBound = bucketBoundary(uint8(i + 1)) - } else { - upperBound = math.MaxInt64 - } - buckets[i] = &bucketData{ - Lower: bucketBoundary(uint8(i)), - Upper: upperBound, - N: n, - Pct: float64(n) * pctMult, - CumulativePct: float64(runningTotal) * pctMult, - GraphWidth: int(float64(n) * barsizeMult), - } - } - return &data{ - Buckets: buckets, - Count: total, - Median: h.median(), - Mean: h.average(), - StandardDeviation: h.standardDeviation(), - } -} - -func (h *histogram) html() template.HTML { - buf := new(bytes.Buffer) - if err := distTmpl().Execute(buf, h.newData()); err != nil { - buf.Reset() - log.Printf("net/trace: couldn't execute template: %v", err) - } - return template.HTML(buf.String()) -} - -var distTmplCache *template.Template -var distTmplOnce sync.Once - -func distTmpl() *template.Template { - distTmplOnce.Do(func() { - // Input: data - distTmplCache = template.Must(template.New("distTmpl").Parse(` -<table> -<tr> - <td style="padding:0.25em">Count: {{.Count}}</td> - <td style="padding:0.25em">Mean: {{printf "%.0f" .Mean}}</td> - <td style="padding:0.25em">StdDev: {{printf "%.0f" .StandardDeviation}}</td> - <td style="padding:0.25em">Median: {{.Median}}</td> -</tr> -</table> -<hr> -<table> -{{range $b := .Buckets}} -{{if $b}} - <tr> - <td style="padding:0 0 0 0.25em">[</td> - <td style="text-align:right;padding:0 0.25em">{{.Lower}},</td> - <td style="text-align:right;padding:0 0.25em">{{.Upper}})</td> - <td style="text-align:right;padding:0 0.25em">{{.N}}</td> - <td style="text-align:right;padding:0 0.25em">{{printf "%#.3f" .Pct}}%</td> - <td style="text-align:right;padding:0 0.25em">{{printf "%#.3f" .CumulativePct}}%</td> - <td><div style="background-color: blue; height: 1em; width: {{.GraphWidth}};"></div></td> - </tr> -{{end}} -{{end}} -</table> -`)) - }) - return distTmplCache -} diff --git a/vendor/golang.org/x/net/trace/trace.go b/vendor/golang.org/x/net/trace/trace.go deleted file mode 100644 index 64f56a373..000000000 --- a/vendor/golang.org/x/net/trace/trace.go +++ /dev/null @@ -1,1079 +0,0 @@ -// Copyright 2015 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -/* -Package trace implements tracing of requests and long-lived objects. -It exports HTTP interfaces on /debug/requests and /debug/events. - -A trace.Trace provides tracing for short-lived objects, usually requests. -A request handler might be implemented like this: - - func fooHandler(w http.ResponseWriter, req *http.Request) { - tr := trace.New("mypkg.Foo", req.URL.Path) - defer tr.Finish() - ... - tr.LazyPrintf("some event %q happened", str) - ... - if err := somethingImportant(); err != nil { - tr.LazyPrintf("somethingImportant failed: %v", err) - tr.SetError() - } - } - -The /debug/requests HTTP endpoint organizes the traces by family, -errors, and duration. It also provides histogram of request duration -for each family. - -A trace.EventLog provides tracing for long-lived objects, such as RPC -connections. - - // A Fetcher fetches URL paths for a single domain. - type Fetcher struct { - domain string - events trace.EventLog - } - - func NewFetcher(domain string) *Fetcher { - return &Fetcher{ - domain, - trace.NewEventLog("mypkg.Fetcher", domain), - } - } - - func (f *Fetcher) Fetch(path string) (string, error) { - resp, err := http.Get("http://" + f.domain + "/" + path) - if err != nil { - f.events.Errorf("Get(%q) = %v", path, err) - return "", err - } - f.events.Printf("Get(%q) = %s", path, resp.Status) - ... - } - - func (f *Fetcher) Close() error { - f.events.Finish() - return nil - } - -The /debug/events HTTP endpoint organizes the event logs by family and -by time since the last error. The expanded view displays recent log -entries and the log's call stack. -*/ -package trace // import "golang.org/x/net/trace" - -import ( - "bytes" - "fmt" - "html/template" - "io" - "log" - "net" - "net/http" - "runtime" - "sort" - "strconv" - "sync" - "sync/atomic" - "time" - - "golang.org/x/net/context" - "golang.org/x/net/internal/timeseries" -) - -// DebugUseAfterFinish controls whether to debug uses of Trace values after finishing. -// FOR DEBUGGING ONLY. This will slow down the program. -var DebugUseAfterFinish = false - -// AuthRequest determines whether a specific request is permitted to load the -// /debug/requests or /debug/events pages. -// -// It returns two bools; the first indicates whether the page may be viewed at all, -// and the second indicates whether sensitive events will be shown. -// -// AuthRequest may be replaced by a program to customize its authorization requirements. -// -// The default AuthRequest function returns (true, true) if and only if the request -// comes from localhost/127.0.0.1/[::1]. -var AuthRequest = func(req *http.Request) (any, sensitive bool) { - // RemoteAddr is commonly in the form "IP" or "IP:port". - // If it is in the form "IP:port", split off the port. - host, _, err := net.SplitHostPort(req.RemoteAddr) - if err != nil { - host = req.RemoteAddr - } - switch host { - case "localhost", "127.0.0.1", "::1": - return true, true - default: - return false, false - } -} - -func init() { - http.HandleFunc("/debug/requests", func(w http.ResponseWriter, req *http.Request) { - any, sensitive := AuthRequest(req) - if !any { - http.Error(w, "not allowed", http.StatusUnauthorized) - return - } - w.Header().Set("Content-Type", "text/html; charset=utf-8") - Render(w, req, sensitive) - }) - http.HandleFunc("/debug/events", func(w http.ResponseWriter, req *http.Request) { - any, sensitive := AuthRequest(req) - if !any { - http.Error(w, "not allowed", http.StatusUnauthorized) - return - } - w.Header().Set("Content-Type", "text/html; charset=utf-8") - RenderEvents(w, req, sensitive) - }) -} - -// Render renders the HTML page typically served at /debug/requests. -// It does not do any auth checking; see AuthRequest for the default auth check -// used by the handler registered on http.DefaultServeMux. -// req may be nil. -func Render(w io.Writer, req *http.Request, sensitive bool) { - data := &struct { - Families []string - ActiveTraceCount map[string]int - CompletedTraces map[string]*family - - // Set when a bucket has been selected. - Traces traceList - Family string - Bucket int - Expanded bool - Traced bool - Active bool - ShowSensitive bool // whether to show sensitive events - - Histogram template.HTML - HistogramWindow string // e.g. "last minute", "last hour", "all time" - - // If non-zero, the set of traces is a partial set, - // and this is the total number. - Total int - }{ - CompletedTraces: completedTraces, - } - - data.ShowSensitive = sensitive - if req != nil { - // Allow show_sensitive=0 to force hiding of sensitive data for testing. - // This only goes one way; you can't use show_sensitive=1 to see things. - if req.FormValue("show_sensitive") == "0" { - data.ShowSensitive = false - } - - if exp, err := strconv.ParseBool(req.FormValue("exp")); err == nil { - data.Expanded = exp - } - if exp, err := strconv.ParseBool(req.FormValue("rtraced")); err == nil { - data.Traced = exp - } - } - - completedMu.RLock() - data.Families = make([]string, 0, len(completedTraces)) - for fam := range completedTraces { - data.Families = append(data.Families, fam) - } - completedMu.RUnlock() - sort.Strings(data.Families) - - // We are careful here to minimize the time spent locking activeMu, - // since that lock is required every time an RPC starts and finishes. - data.ActiveTraceCount = make(map[string]int, len(data.Families)) - activeMu.RLock() - for fam, s := range activeTraces { - data.ActiveTraceCount[fam] = s.Len() - } - activeMu.RUnlock() - - var ok bool - data.Family, data.Bucket, ok = parseArgs(req) - switch { - case !ok: - // No-op - case data.Bucket == -1: - data.Active = true - n := data.ActiveTraceCount[data.Family] - data.Traces = getActiveTraces(data.Family) - if len(data.Traces) < n { - data.Total = n - } - case data.Bucket < bucketsPerFamily: - if b := lookupBucket(data.Family, data.Bucket); b != nil { - data.Traces = b.Copy(data.Traced) - } - default: - if f := getFamily(data.Family, false); f != nil { - var obs timeseries.Observable - f.LatencyMu.RLock() - switch o := data.Bucket - bucketsPerFamily; o { - case 0: - obs = f.Latency.Minute() - data.HistogramWindow = "last minute" - case 1: - obs = f.Latency.Hour() - data.HistogramWindow = "last hour" - case 2: - obs = f.Latency.Total() - data.HistogramWindow = "all time" - } - f.LatencyMu.RUnlock() - if obs != nil { - data.Histogram = obs.(*histogram).html() - } - } - } - - if data.Traces != nil { - defer data.Traces.Free() - sort.Sort(data.Traces) - } - - completedMu.RLock() - defer completedMu.RUnlock() - if err := pageTmpl().ExecuteTemplate(w, "Page", data); err != nil { - log.Printf("net/trace: Failed executing template: %v", err) - } -} - -func parseArgs(req *http.Request) (fam string, b int, ok bool) { - if req == nil { - return "", 0, false - } - fam, bStr := req.FormValue("fam"), req.FormValue("b") - if fam == "" || bStr == "" { - return "", 0, false - } - b, err := strconv.Atoi(bStr) - if err != nil || b < -1 { - return "", 0, false - } - - return fam, b, true -} - -func lookupBucket(fam string, b int) *traceBucket { - f := getFamily(fam, false) - if f == nil || b < 0 || b >= len(f.Buckets) { - return nil - } - return f.Buckets[b] -} - -type contextKeyT string - -var contextKey = contextKeyT("golang.org/x/net/trace.Trace") - -// NewContext returns a copy of the parent context -// and associates it with a Trace. -func NewContext(ctx context.Context, tr Trace) context.Context { - return context.WithValue(ctx, contextKey, tr) -} - -// FromContext returns the Trace bound to the context, if any. -func FromContext(ctx context.Context) (tr Trace, ok bool) { - tr, ok = ctx.Value(contextKey).(Trace) - return -} - -// Trace represents an active request. -type Trace interface { - // LazyLog adds x to the event log. It will be evaluated each time the - // /debug/requests page is rendered. Any memory referenced by x will be - // pinned until the trace is finished and later discarded. - LazyLog(x fmt.Stringer, sensitive bool) - - // LazyPrintf evaluates its arguments with fmt.Sprintf each time the - // /debug/requests page is rendered. Any memory referenced by a will be - // pinned until the trace is finished and later discarded. - LazyPrintf(format string, a ...interface{}) - - // SetError declares that this trace resulted in an error. - SetError() - - // SetRecycler sets a recycler for the trace. - // f will be called for each event passed to LazyLog at a time when - // it is no longer required, whether while the trace is still active - // and the event is discarded, or when a completed trace is discarded. - SetRecycler(f func(interface{})) - - // SetTraceInfo sets the trace info for the trace. - // This is currently unused. - SetTraceInfo(traceID, spanID uint64) - - // SetMaxEvents sets the maximum number of events that will be stored - // in the trace. This has no effect if any events have already been - // added to the trace. - SetMaxEvents(m int) - - // Finish declares that this trace is complete. - // The trace should not be used after calling this method. - Finish() -} - -type lazySprintf struct { - format string - a []interface{} -} - -func (l *lazySprintf) String() string { - return fmt.Sprintf(l.format, l.a...) -} - -// New returns a new Trace with the specified family and title. -func New(family, title string) Trace { - tr := newTrace() - tr.ref() - tr.Family, tr.Title = family, title - tr.Start = time.Now() - tr.maxEvents = maxEventsPerTrace - tr.events = tr.eventsBuf[:0] - - activeMu.RLock() - s := activeTraces[tr.Family] - activeMu.RUnlock() - if s == nil { - activeMu.Lock() - s = activeTraces[tr.Family] // check again - if s == nil { - s = new(traceSet) - activeTraces[tr.Family] = s - } - activeMu.Unlock() - } - s.Add(tr) - - // Trigger allocation of the completed trace structure for this family. - // This will cause the family to be present in the request page during - // the first trace of this family. We don't care about the return value, - // nor is there any need for this to run inline, so we execute it in its - // own goroutine, but only if the family isn't allocated yet. - completedMu.RLock() - if _, ok := completedTraces[tr.Family]; !ok { - go allocFamily(tr.Family) - } - completedMu.RUnlock() - - return tr -} - -func (tr *trace) Finish() { - tr.Elapsed = time.Now().Sub(tr.Start) - if DebugUseAfterFinish { - buf := make([]byte, 4<<10) // 4 KB should be enough - n := runtime.Stack(buf, false) - tr.finishStack = buf[:n] - } - - activeMu.RLock() - m := activeTraces[tr.Family] - activeMu.RUnlock() - m.Remove(tr) - - f := getFamily(tr.Family, true) - for _, b := range f.Buckets { - if b.Cond.match(tr) { - b.Add(tr) - } - } - // Add a sample of elapsed time as microseconds to the family's timeseries - h := new(histogram) - h.addMeasurement(tr.Elapsed.Nanoseconds() / 1e3) - f.LatencyMu.Lock() - f.Latency.Add(h) - f.LatencyMu.Unlock() - - tr.unref() // matches ref in New -} - -const ( - bucketsPerFamily = 9 - tracesPerBucket = 10 - maxActiveTraces = 20 // Maximum number of active traces to show. - maxEventsPerTrace = 10 - numHistogramBuckets = 38 -) - -var ( - // The active traces. - activeMu sync.RWMutex - activeTraces = make(map[string]*traceSet) // family -> traces - - // Families of completed traces. - completedMu sync.RWMutex - completedTraces = make(map[string]*family) // family -> traces -) - -type traceSet struct { - mu sync.RWMutex - m map[*trace]bool - - // We could avoid the entire map scan in FirstN by having a slice of all the traces - // ordered by start time, and an index into that from the trace struct, with a periodic - // repack of the slice after enough traces finish; we could also use a skip list or similar. - // However, that would shift some of the expense from /debug/requests time to RPC time, - // which is probably the wrong trade-off. -} - -func (ts *traceSet) Len() int { - ts.mu.RLock() - defer ts.mu.RUnlock() - return len(ts.m) -} - -func (ts *traceSet) Add(tr *trace) { - ts.mu.Lock() - if ts.m == nil { - ts.m = make(map[*trace]bool) - } - ts.m[tr] = true - ts.mu.Unlock() -} - -func (ts *traceSet) Remove(tr *trace) { - ts.mu.Lock() - delete(ts.m, tr) - ts.mu.Unlock() -} - -// FirstN returns the first n traces ordered by time. -func (ts *traceSet) FirstN(n int) traceList { - ts.mu.RLock() - defer ts.mu.RUnlock() - - if n > len(ts.m) { - n = len(ts.m) - } - trl := make(traceList, 0, n) - - // Fast path for when no selectivity is needed. - if n == len(ts.m) { - for tr := range ts.m { - tr.ref() - trl = append(trl, tr) - } - sort.Sort(trl) - return trl - } - - // Pick the oldest n traces. - // This is inefficient. See the comment in the traceSet struct. - for tr := range ts.m { - // Put the first n traces into trl in the order they occur. - // When we have n, sort trl, and thereafter maintain its order. - if len(trl) < n { - tr.ref() - trl = append(trl, tr) - if len(trl) == n { - // This is guaranteed to happen exactly once during this loop. - sort.Sort(trl) - } - continue - } - if tr.Start.After(trl[n-1].Start) { - continue - } - - // Find where to insert this one. - tr.ref() - i := sort.Search(n, func(i int) bool { return trl[i].Start.After(tr.Start) }) - trl[n-1].unref() - copy(trl[i+1:], trl[i:]) - trl[i] = tr - } - - return trl -} - -func getActiveTraces(fam string) traceList { - activeMu.RLock() - s := activeTraces[fam] - activeMu.RUnlock() - if s == nil { - return nil - } - return s.FirstN(maxActiveTraces) -} - -func getFamily(fam string, allocNew bool) *family { - completedMu.RLock() - f := completedTraces[fam] - completedMu.RUnlock() - if f == nil && allocNew { - f = allocFamily(fam) - } - return f -} - -func allocFamily(fam string) *family { - completedMu.Lock() - defer completedMu.Unlock() - f := completedTraces[fam] - if f == nil { - f = newFamily() - completedTraces[fam] = f - } - return f -} - -// family represents a set of trace buckets and associated latency information. -type family struct { - // traces may occur in multiple buckets. - Buckets [bucketsPerFamily]*traceBucket - - // latency time series - LatencyMu sync.RWMutex - Latency *timeseries.MinuteHourSeries -} - -func newFamily() *family { - return &family{ - Buckets: [bucketsPerFamily]*traceBucket{ - {Cond: minCond(0)}, - {Cond: minCond(50 * time.Millisecond)}, - {Cond: minCond(100 * time.Millisecond)}, - {Cond: minCond(200 * time.Millisecond)}, - {Cond: minCond(500 * time.Millisecond)}, - {Cond: minCond(1 * time.Second)}, - {Cond: minCond(10 * time.Second)}, - {Cond: minCond(100 * time.Second)}, - {Cond: errorCond{}}, - }, - Latency: timeseries.NewMinuteHourSeries(func() timeseries.Observable { return new(histogram) }), - } -} - -// traceBucket represents a size-capped bucket of historic traces, -// along with a condition for a trace to belong to the bucket. -type traceBucket struct { - Cond cond - - // Ring buffer implementation of a fixed-size FIFO queue. - mu sync.RWMutex - buf [tracesPerBucket]*trace - start int // < tracesPerBucket - length int // <= tracesPerBucket -} - -func (b *traceBucket) Add(tr *trace) { - b.mu.Lock() - defer b.mu.Unlock() - - i := b.start + b.length - if i >= tracesPerBucket { - i -= tracesPerBucket - } - if b.length == tracesPerBucket { - // "Remove" an element from the bucket. - b.buf[i].unref() - b.start++ - if b.start == tracesPerBucket { - b.start = 0 - } - } - b.buf[i] = tr - if b.length < tracesPerBucket { - b.length++ - } - tr.ref() -} - -// Copy returns a copy of the traces in the bucket. -// If tracedOnly is true, only the traces with trace information will be returned. -// The logs will be ref'd before returning; the caller should call -// the Free method when it is done with them. -// TODO(dsymonds): keep track of traced requests in separate buckets. -func (b *traceBucket) Copy(tracedOnly bool) traceList { - b.mu.RLock() - defer b.mu.RUnlock() - - trl := make(traceList, 0, b.length) - for i, x := 0, b.start; i < b.length; i++ { - tr := b.buf[x] - if !tracedOnly || tr.spanID != 0 { - tr.ref() - trl = append(trl, tr) - } - x++ - if x == b.length { - x = 0 - } - } - return trl -} - -func (b *traceBucket) Empty() bool { - b.mu.RLock() - defer b.mu.RUnlock() - return b.length == 0 -} - -// cond represents a condition on a trace. -type cond interface { - match(t *trace) bool - String() string -} - -type minCond time.Duration - -func (m minCond) match(t *trace) bool { return t.Elapsed >= time.Duration(m) } -func (m minCond) String() string { return fmt.Sprintf("≥%gs", time.Duration(m).Seconds()) } - -type errorCond struct{} - -func (e errorCond) match(t *trace) bool { return t.IsError } -func (e errorCond) String() string { return "errors" } - -type traceList []*trace - -// Free calls unref on each element of the list. -func (trl traceList) Free() { - for _, t := range trl { - t.unref() - } -} - -// traceList may be sorted in reverse chronological order. -func (trl traceList) Len() int { return len(trl) } -func (trl traceList) Less(i, j int) bool { return trl[i].Start.After(trl[j].Start) } -func (trl traceList) Swap(i, j int) { trl[i], trl[j] = trl[j], trl[i] } - -// An event is a timestamped log entry in a trace. -type event struct { - When time.Time - Elapsed time.Duration // since previous event in trace - NewDay bool // whether this event is on a different day to the previous event - Recyclable bool // whether this event was passed via LazyLog - Sensitive bool // whether this event contains sensitive information - What interface{} // string or fmt.Stringer -} - -// WhenString returns a string representation of the elapsed time of the event. -// It will include the date if midnight was crossed. -func (e event) WhenString() string { - if e.NewDay { - return e.When.Format("2006/01/02 15:04:05.000000") - } - return e.When.Format("15:04:05.000000") -} - -// discarded represents a number of discarded events. -// It is stored as *discarded to make it easier to update in-place. -type discarded int - -func (d *discarded) String() string { - return fmt.Sprintf("(%d events discarded)", int(*d)) -} - -// trace represents an active or complete request, -// either sent or received by this program. -type trace struct { - // Family is the top-level grouping of traces to which this belongs. - Family string - - // Title is the title of this trace. - Title string - - // Timing information. - Start time.Time - Elapsed time.Duration // zero while active - - // Trace information if non-zero. - traceID uint64 - spanID uint64 - - // Whether this trace resulted in an error. - IsError bool - - // Append-only sequence of events (modulo discards). - mu sync.RWMutex - events []event - maxEvents int - - refs int32 // how many buckets this is in - recycler func(interface{}) - disc discarded // scratch space to avoid allocation - - finishStack []byte // where finish was called, if DebugUseAfterFinish is set - - eventsBuf [4]event // preallocated buffer in case we only log a few events -} - -func (tr *trace) reset() { - // Clear all but the mutex. Mutexes may not be copied, even when unlocked. - tr.Family = "" - tr.Title = "" - tr.Start = time.Time{} - tr.Elapsed = 0 - tr.traceID = 0 - tr.spanID = 0 - tr.IsError = false - tr.maxEvents = 0 - tr.events = nil - tr.refs = 0 - tr.recycler = nil - tr.disc = 0 - tr.finishStack = nil - for i := range tr.eventsBuf { - tr.eventsBuf[i] = event{} - } -} - -// delta returns the elapsed time since the last event or the trace start, -// and whether it spans midnight. -// L >= tr.mu -func (tr *trace) delta(t time.Time) (time.Duration, bool) { - if len(tr.events) == 0 { - return t.Sub(tr.Start), false - } - prev := tr.events[len(tr.events)-1].When - return t.Sub(prev), prev.Day() != t.Day() -} - -func (tr *trace) addEvent(x interface{}, recyclable, sensitive bool) { - if DebugUseAfterFinish && tr.finishStack != nil { - buf := make([]byte, 4<<10) // 4 KB should be enough - n := runtime.Stack(buf, false) - log.Printf("net/trace: trace used after finish:\nFinished at:\n%s\nUsed at:\n%s", tr.finishStack, buf[:n]) - } - - /* - NOTE TO DEBUGGERS - - If you are here because your program panicked in this code, - it is almost definitely the fault of code using this package, - and very unlikely to be the fault of this code. - - The most likely scenario is that some code elsewhere is using - a trace.Trace after its Finish method is called. - You can temporarily set the DebugUseAfterFinish var - to help discover where that is; do not leave that var set, - since it makes this package much less efficient. - */ - - e := event{When: time.Now(), What: x, Recyclable: recyclable, Sensitive: sensitive} - tr.mu.Lock() - e.Elapsed, e.NewDay = tr.delta(e.When) - if len(tr.events) < tr.maxEvents { - tr.events = append(tr.events, e) - } else { - // Discard the middle events. - di := int((tr.maxEvents - 1) / 2) - if d, ok := tr.events[di].What.(*discarded); ok { - (*d)++ - } else { - // disc starts at two to count for the event it is replacing, - // plus the next one that we are about to drop. - tr.disc = 2 - if tr.recycler != nil && tr.events[di].Recyclable { - go tr.recycler(tr.events[di].What) - } - tr.events[di].What = &tr.disc - } - // The timestamp of the discarded meta-event should be - // the time of the last event it is representing. - tr.events[di].When = tr.events[di+1].When - - if tr.recycler != nil && tr.events[di+1].Recyclable { - go tr.recycler(tr.events[di+1].What) - } - copy(tr.events[di+1:], tr.events[di+2:]) - tr.events[tr.maxEvents-1] = e - } - tr.mu.Unlock() -} - -func (tr *trace) LazyLog(x fmt.Stringer, sensitive bool) { - tr.addEvent(x, true, sensitive) -} - -func (tr *trace) LazyPrintf(format string, a ...interface{}) { - tr.addEvent(&lazySprintf{format, a}, false, false) -} - -func (tr *trace) SetError() { tr.IsError = true } - -func (tr *trace) SetRecycler(f func(interface{})) { - tr.recycler = f -} - -func (tr *trace) SetTraceInfo(traceID, spanID uint64) { - tr.traceID, tr.spanID = traceID, spanID -} - -func (tr *trace) SetMaxEvents(m int) { - // Always keep at least three events: first, discarded count, last. - if len(tr.events) == 0 && m > 3 { - tr.maxEvents = m - } -} - -func (tr *trace) ref() { - atomic.AddInt32(&tr.refs, 1) -} - -func (tr *trace) unref() { - if atomic.AddInt32(&tr.refs, -1) == 0 { - if tr.recycler != nil { - // freeTrace clears tr, so we hold tr.recycler and tr.events here. - go func(f func(interface{}), es []event) { - for _, e := range es { - if e.Recyclable { - f(e.What) - } - } - }(tr.recycler, tr.events) - } - - freeTrace(tr) - } -} - -func (tr *trace) When() string { - return tr.Start.Format("2006/01/02 15:04:05.000000") -} - -func (tr *trace) ElapsedTime() string { - t := tr.Elapsed - if t == 0 { - // Active trace. - t = time.Since(tr.Start) - } - return fmt.Sprintf("%.6f", t.Seconds()) -} - -func (tr *trace) Events() []event { - tr.mu.RLock() - defer tr.mu.RUnlock() - return tr.events -} - -var traceFreeList = make(chan *trace, 1000) // TODO(dsymonds): Use sync.Pool? - -// newTrace returns a trace ready to use. -func newTrace() *trace { - select { - case tr := <-traceFreeList: - return tr - default: - return new(trace) - } -} - -// freeTrace adds tr to traceFreeList if there's room. -// This is non-blocking. -func freeTrace(tr *trace) { - if DebugUseAfterFinish { - return // never reuse - } - tr.reset() - select { - case traceFreeList <- tr: - default: - } -} - -func elapsed(d time.Duration) string { - b := []byte(fmt.Sprintf("%.6f", d.Seconds())) - - // For subsecond durations, blank all zeros before decimal point, - // and all zeros between the decimal point and the first non-zero digit. - if d < time.Second { - dot := bytes.IndexByte(b, '.') - for i := 0; i < dot; i++ { - b[i] = ' ' - } - for i := dot + 1; i < len(b); i++ { - if b[i] == '0' { - b[i] = ' ' - } else { - break - } - } - } - - return string(b) -} - -var pageTmplCache *template.Template -var pageTmplOnce sync.Once - -func pageTmpl() *template.Template { - pageTmplOnce.Do(func() { - pageTmplCache = template.Must(template.New("Page").Funcs(template.FuncMap{ - "elapsed": elapsed, - "add": func(a, b int) int { return a + b }, - }).Parse(pageHTML)) - }) - return pageTmplCache -} - -const pageHTML = ` -{{template "Prolog" .}} -{{template "StatusTable" .}} -{{template "Epilog" .}} - -{{define "Prolog"}} -<html> - <head> - <title>/debug/requests</title> - <style type="text/css"> - body { - font-family: sans-serif; - } - table#tr-status td.family { - padding-right: 2em; - } - table#tr-status td.active { - padding-right: 1em; - } - table#tr-status td.latency-first { - padding-left: 1em; - } - table#tr-status td.empty { - color: #aaa; - } - table#reqs { - margin-top: 1em; - } - table#reqs tr.first { - {{if $.Expanded}}font-weight: bold;{{end}} - } - table#reqs td { - font-family: monospace; - } - table#reqs td.when { - text-align: right; - white-space: nowrap; - } - table#reqs td.elapsed { - padding: 0 0.5em; - text-align: right; - white-space: pre; - width: 10em; - } - address { - font-size: smaller; - margin-top: 5em; - } - </style> - </head> - <body> - -<h1>/debug/requests</h1> -{{end}} {{/* end of Prolog */}} - -{{define "StatusTable"}} -<table id="tr-status"> - {{range $fam := .Families}} - <tr> - <td class="family">{{$fam}}</td> - - {{$n := index $.ActiveTraceCount $fam}} - <td class="active {{if not $n}}empty{{end}}"> - {{if $n}}<a href="?fam={{$fam}}&b=-1{{if $.Expanded}}&exp=1{{end}}">{{end}} - [{{$n}} active] - {{if $n}}</a>{{end}} - </td> - - {{$f := index $.CompletedTraces $fam}} - {{range $i, $b := $f.Buckets}} - {{$empty := $b.Empty}} - <td {{if $empty}}class="empty"{{end}}> - {{if not $empty}}<a href="?fam={{$fam}}&b={{$i}}{{if $.Expanded}}&exp=1{{end}}">{{end}} - [{{.Cond}}] - {{if not $empty}}</a>{{end}} - </td> - {{end}} - - {{$nb := len $f.Buckets}} - <td class="latency-first"> - <a href="?fam={{$fam}}&b={{$nb}}">[minute]</a> - </td> - <td> - <a href="?fam={{$fam}}&b={{add $nb 1}}">[hour]</a> - </td> - <td> - <a href="?fam={{$fam}}&b={{add $nb 2}}">[total]</a> - </td> - - </tr> - {{end}} -</table> -{{end}} {{/* end of StatusTable */}} - -{{define "Epilog"}} -{{if $.Traces}} -<hr /> -<h3>Family: {{$.Family}}</h3> - -{{if or $.Expanded $.Traced}} - <a href="?fam={{$.Family}}&b={{$.Bucket}}">[Normal/Summary]</a> -{{else}} - [Normal/Summary] -{{end}} - -{{if or (not $.Expanded) $.Traced}} - <a href="?fam={{$.Family}}&b={{$.Bucket}}&exp=1">[Normal/Expanded]</a> -{{else}} - [Normal/Expanded] -{{end}} - -{{if not $.Active}} - {{if or $.Expanded (not $.Traced)}} - <a href="?fam={{$.Family}}&b={{$.Bucket}}&rtraced=1">[Traced/Summary]</a> - {{else}} - [Traced/Summary] - {{end}} - {{if or (not $.Expanded) (not $.Traced)}} - <a href="?fam={{$.Family}}&b={{$.Bucket}}&exp=1&rtraced=1">[Traced/Expanded]</a> - {{else}} - [Traced/Expanded] - {{end}} -{{end}} - -{{if $.Total}} -<p><em>Showing <b>{{len $.Traces}}</b> of <b>{{$.Total}}</b> traces.</em></p> -{{end}} - -<table id="reqs"> - <caption> - {{if $.Active}}Active{{else}}Completed{{end}} Requests - </caption> - <tr><th>When</th><th>Elapsed (s)</th></tr> - {{range $tr := $.Traces}} - <tr class="first"> - <td class="when">{{$tr.When}}</td> - <td class="elapsed">{{$tr.ElapsedTime}}</td> - <td>{{$tr.Title}}</td> - {{/* TODO: include traceID/spanID */}} - </tr> - {{if $.Expanded}} - {{range $tr.Events}} - <tr> - <td class="when">{{.WhenString}}</td> - <td class="elapsed">{{elapsed .Elapsed}}</td> - <td>{{if or $.ShowSensitive (not .Sensitive)}}... {{.What}}{{else}}<em>[redacted]</em>{{end}}</td> - </tr> - {{end}} - {{end}} - {{end}} -</table> -{{end}} {{/* if $.Traces */}} - -{{if $.Histogram}} -<h4>Latency (µs) of {{$.Family}} over {{$.HistogramWindow}}</h4> -{{$.Histogram}} -{{end}} {{/* if $.Histogram */}} - - </body> -</html> -{{end}} {{/* end of Epilog */}} -` |