- 19 Dec, 2018 1 commit
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Michael Anthony Knyszek authored
startpanic_m could be called correctly in a context where there's a valid G, a valid M, but no P, for example in a signal handler which panics. Currently, startpanic_m has write barriers enabled because write barriers are permitted if a G's M is dying. However, all the current write barrier implementations assume the current G has a P. Therefore, in this change we disable write barriers in startpanic_m, remove the only pointer write which clears g.writebuf, and fix up gwrite to ignore the writebuf if the current G's M is dying, rather than relying on it being nil in the dying case. Fixes #26575. Change-Id: I9b29e6b9edf00d8e99ffc71770c287142ebae086 Reviewed-on: https://go-review.googlesource.com/c/154837 Run-TryBot: Michael Knyszek <mknyszek@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Austin Clements <austin@google.com>
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- 18 Dec, 2018 18 commits
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Jordan Rhee authored
The previous implementation of nanotime and time.now used a time source that was updated on the system clock tick, which has a maximum resolution of about 1ms. On 386 and amd64, this time source maps to the system performance counter, so has much higher resolution. On ARM, use QueryPerformanceCounter() to get a high resolution timestamp. Updates #26148 Change-Id: I1abc99baf927a95b472ac05020a7788626c71d08 Reviewed-on: https://go-review.googlesource.com/c/154758Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Elias Naur authored
Change-Id: I4277f4130b460b42c5b51fd5a5e07f6c0e62163b Reviewed-on: https://go-review.googlesource.com/c/154720Reviewed-by:
Ian Lance Taylor <iant@golang.org>
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Filippo Valsorda authored
Change-Id: I9a30c76d1299a494cce69b1060156bc2932ac8d5 Reviewed-on: https://go-review.googlesource.com/c/154857Reviewed-by:
Dmitri Shuralyov <dmitshur@golang.org> Reviewed-by:
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Kevin Burke authored
Permission bits are most commonly viewed in string form (rwx-- etc) or in octal form (0755), but the latter is relatively rare in Go. Demonstrate how to print a FileMode in readable octal format. Change-Id: I41feb801bcecb5077d4eabafdea27c149fc179a1 Reviewed-on: https://go-review.googlesource.com/c/154423 Run-TryBot: Ian Lance Taylor <iant@golang.org> Reviewed-by:
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Michael Anthony Knyszek authored
This change makes it so that reserving more of the address space for the heap calls mmap with MAP_FIXED in race mode. Race mode requires certain guarantees on where the heap is located in the address space, and on Darwin 10.10 it appears that the kernel may end up ignoring the hint quite often (#26475). Using MAP_FIXED is relatively OK in race mode because nothing else should be mapped in the memory region provided by the initial hints. Fixes #26475. Change-Id: Id7ac1534ee74f6de491bc04441f27dbda09f0285 Reviewed-on: https://go-review.googlesource.com/c/153897Reviewed-by:
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Ian Lance Taylor authored
When using //line directives and unformatted code it is possible for positions to repeat. Increment the final column position to avoid that. Fixes #27350 Change-Id: I2faccc31360075e9814d4a024b0f98b117f8ce97 Reviewed-on: https://go-review.googlesource.com/c/153061 Run-TryBot: Rob Pike <r@golang.org> Reviewed-by:
Rob Pike <r@golang.org>
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Ian Lance Taylor authored
This ensures that "go test cmd/cover" tests the current cover program, not the installed cover program. Change-Id: I58e718ded7eb1cd8da448d0194262209bb025b20 Reviewed-on: https://go-review.googlesource.com/c/153058 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Cherry Zhang authored
CL 138675 added the race detector support on Linux/ARM64, but it didn't enable the race detector tests in cmd/dist (therefore in all.bash). Enable them. Updates #28848 Change-Id: I4306dad2fb4167021d568436076b9f535d7f6e07 Reviewed-on: https://go-review.googlesource.com/c/149967 Run-TryBot: Cherry Zhang <cherryyz@google.com> Reviewed-by:
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Filippo Valsorda authored
Change-Id: I598c9a2031001a6780b75c31d9015c880741b170 Reviewed-on: https://go-review.googlesource.com/c/154637Reviewed-by:
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Dmitri Shuralyov authored
Also update a Go 1 compatibility promise link to canonical URL. Updates #27592 Updates #28264 Change-Id: I5994a0a63e0870c1795c65016590dfad829d26a7 Reviewed-on: https://go-review.googlesource.com/c/154618Reviewed-by:
Richard Musiol <neelance@gmail.com> Reviewed-by:
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Martin Möhrmann authored
Change-Id: Id68b62138e14d13bb352b14c7f42bcef5601eee3 Reviewed-on: https://go-review.googlesource.com/c/154717Reviewed-by:
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Clément Chigot authored
This commit fixes backtrace if a crash or an exit signal is received during a C syscall on aix/ppc64. This is similar to Solaris, Darwin or Windows implementation. Change-Id: I6040c0b1577a9f5b298f58bd4ee6556258a135ef Reviewed-on: https://go-review.googlesource.com/c/154718 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Clément Chigot authored
This commit changes the second instruction used to retrieve a symbol on aix/ppc64 if it is in .data or .bss section. The previous version always retrieves the symbol address via a load on its TOC symbol. However, as the TOC is also in .data, the symbol's address is close enough to be fetched directly and the load instruction can be replaced by an addi. Bench go1 benchmark old ns/op new ns/op delta BenchmarkBinaryTree17-16 5919354000 5824897000 -1.60% BenchmarkFannkuch11-16 5206937000 5162043000 -0.86% BenchmarkFmtFprintfEmpty-16 106 105 -0.94% BenchmarkFmtFprintfString-16 165 165 +0.00% BenchmarkFmtFprintfInt-16 165 167 +1.21% BenchmarkFmtFprintfIntInt-16 303 239 -21.12% BenchmarkFmtFprintfPrefixedInt-16 282 283 +0.35% BenchmarkFmtFprintfFloat-16 434 381 -12.21% BenchmarkFmtManyArgs-16 1797 903 -49.75% BenchmarkGobDecode-16 16000450 12173630 -23.92% BenchmarkGobEncode-16 12007010 10258070 -14.57% BenchmarkGzip-16 638581500 456050333 -28.58% BenchmarkGunzip-16 111976900 74943900 -33.07% BenchmarkHTTPClientServer-16 206850 153716 -25.69% BenchmarkJSONEncode-16 32057380 17517130 -45.36% BenchmarkJSONDecode-16 182606400 106807700 -41.51% BenchmarkMandelbrot200-16 6896975 5616903 -18.56% BenchmarkGoParse-16 11248260 6094115 -45.82% BenchmarkRegexpMatchEasy0_32-16 292 148 -49.32% BenchmarkRegexpMatchEasy0_1K-16 540 327 -39.44% BenchmarkRegexpMatchEasy1_32-16 243 150 -38.27% BenchmarkRegexpMatchEasy1_1K-16 1029 657 -36.15% BenchmarkRegexpMatchMedium_32-16 423 230 -45.63% BenchmarkRegexpMatchMedium_1K-16 107250 59683 -44.35% BenchmarkRegexpMatchHard_32-16 3353 3139 -6.38% BenchmarkRegexpMatchHard_1K-16 107277 93610 -12.74% BenchmarkRevcomp-16 1124311500 677442500 -39.75% BenchmarkTemplate-16 241286600 109177400 -54.75% BenchmarkTimeParse-16 1058 562 -46.88% BenchmarkTimeFormat-16 1321 581 -56.02% benchmark old MB/s new MB/s speedup BenchmarkGobDecode-16 47.97 63.05 1.31x BenchmarkGobEncode-16 63.92 74.82 1.17x BenchmarkGzip-16 30.39 42.55 1.40x BenchmarkGunzip-16 173.29 258.92 1.49x BenchmarkJSONEncode-16 60.53 110.78 1.83x BenchmarkJSONDecode-16 10.63 18.17 1.71x BenchmarkGoParse-16 5.15 9.50 1.84x BenchmarkRegexpMatchEasy0_32-16 109.42 215.86 1.97x BenchmarkRegexpMatchEasy0_1K-16 1896.22 3126.28 1.65x BenchmarkRegexpMatchEasy1_32-16 131.46 212.99 1.62x BenchmarkRegexpMatchEasy1_1K-16 994.55 1557.51 1.57x BenchmarkRegexpMatchMedium_32-16 2.36 4.34 1.84x BenchmarkRegexpMatchMedium_1K-16 9.55 17.16 1.80x BenchmarkRegexpMatchHard_32-16 9.54 10.19 1.07x BenchmarkRegexpMatchHard_1K-16 9.55 10.94 1.15x BenchmarkRevcomp-16 226.06 375.19 1.66x BenchmarkTemplate-16 8.04 17.77 2.21x Change-Id: Iaf2aa5953b99271361510c69a5ced3371f6c6c20 Reviewed-on: https://go-review.googlesource.com/c/151201 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Clément Chigot authored
Fixes #29315 Change-Id: I6ecc5109c23e7a7d9db54250bf041acc841701e3 Reviewed-on: https://go-review.googlesource.com/c/154697Reviewed-by:
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Austin Clements authored
Currently, we flush the write barrier buffer on every write barrier once throwOnGCWork is set, but not during the mark completion algorithm itself. As seen in recent failures like https://build.golang.org/log/317369853b803b4ee762b27653f367e1aa445ac1 by the time we actually catch a late gcWork put, the write barrier buffer is full-size again. As a result, we're probably not catching the actual problematic write barrier, which is probably somewhere in the buffer. Fix this by using the gcWork pause generation to also keep the write barrier buffer small between the mark completion flushes it and when mark completion is done. For #27993. Change-Id: I77618169441d42a7d562fb2a998cfaa89891edb2 Reviewed-on: https://go-review.googlesource.com/c/154638 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Russ Cox <rsc@golang.org> Reviewed-by:
Michael Knyszek <mknyszek@google.com>
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Martin Möhrmann authored
Fixes #27218 Change-Id: I4eb8e8f2486b20fe0ed6e3e2c6ec521c9e8c0032 Reviewed-on: https://go-review.googlesource.com/c/149579Reviewed-by:
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Joel Sing authored
Add support for cgo on openbsd/arm.The gcc shipped with base OpenBSD armv7 is old/inadequate, so use clang by default. Change-Id: I945a26d369378952d357727718e69249411e1127 Reviewed-on: https://go-review.googlesource.com/c/154381 Run-TryBot: Joel Sing <joel@sing.id.au> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Robert Griesemer authored
The formatting routines for types use a depth limit as primitive mechanism to detect cycles. For now, increase the limit from 100 to 250 and file #29312 so we don't drop this on the floor. Also, adjust some fatal error messages elsewhere to use better formatting. Fixes #29264. Updates #29312. Change-Id: Idd529f6682d478e0dcd2d469cb802192190602f6 Reviewed-on: https://go-review.googlesource.com/c/154583Reviewed-by:
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- 17 Dec, 2018 19 commits
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Ian Lance Taylor authored
Fixes #29260 Change-Id: I419b74d06380113f4bd32b9aeb053c3be36208d5 Reviewed-on: https://go-review.googlesource.com/c/154584Reviewed-by:
Alan Donovan <adonovan@google.com>
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Michael Anthony Knyszek authored
This change modifies the behavior of span allocations to no longer prefer the free treap over the scavenged treap. While there is an additional cost to allocating out of the scavenged treap, the current behavior of preferring the unscavenged spans can lead to unbounded growth of a program's virtual memory footprint. In small programs (low # of Ps, low resident set size, low allocation rate) this behavior isn't really apparent and is difficult to reproduce. However, in relatively large, long-running programs we see this unbounded growth in free spans, and an unbounded amount of heap growths. It still remains unclear how this policy change actually ends up increasing the number of heap growths over time, but switching the policy back to best-fit does indeed solve the problem. Change-Id: Ibb88d24f9ef6766baaa7f12b411974cc03341e7b Reviewed-on: https://go-review.googlesource.com/c/148979 Run-TryBot: Michael Knyszek <mknyszek@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Rick Hudson <rlh@golang.org> Reviewed-by:
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Michael Anthony Knyszek authored
This change adds the treapIter type which provides an iterator abstraction for walking over an mTreap. In particular, the mTreap type now has iter() and rev() for iterating both forwards (smallest to largest) and backwards (largest to smallest). It also has an erase() method for erasing elements at the iterator's current position. For #28479. While the expectation is that this change will slow down Go programs, the impact on Go1 and Garbage is negligible. Go1: https://perf.golang.org/search?q=upload:20181214.6 Garbage: https://perf.golang.org/search?q=upload:20181214.11 Change-Id: I60dbebbbe73cbbe7b78d45d2093cec12cc0bc649 Reviewed-on: https://go-review.googlesource.com/c/151537 Run-TryBot: Michael Knyszek <mknyszek@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Clément Chigot authored
This commit move data addresses to 0x200000000 for XCOFF executables. .data and .bss must always be position-independent on AIX. This modification allows to detect more easily if they aren't, as segfault will be triggered. Change-Id: Ied7a5b72b9f4ff9f870a1626cf07c48110635e62 Reviewed-on: https://go-review.googlesource.com/c/151040 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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David Chase authored
When a println arg contains a call to an inlineable function that itself contains a switch, that switch statement will be walked twice, once by the walkexprlist formerly in the OPRINT/OPRINTN case, then by walkexprlistcheap in walkprint. Remove the first walkexprlist, it is not necessary. walkexprlist = s[i] = walkexpr(s[i], init) walkexprlistcheap = { s[i] = cheapexpr(n, init) s[i] = walkexpr(s[i], init) } Seems like this might be possible in other places, i.e., calls to inlineable switch-containing functions. See also #25776. Fixes #29220. Change-Id: I3781e86aad6688711597b8bee9bc7ebd3af93601 Reviewed-on: https://go-review.googlesource.com/c/154497 Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:Keith Randall <khr@golang.org>
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Michael Anthony Knyszek authored
sysUsed on Windows cares about the result from the VirtualAlloc syscall returning exactly the address that was passed to it. However, VirtualAlloc aligns the address its given to the kernel's allocation granularity, so the returned address may not be the same. Note that this wasn't an issue in the past because we only sysUsed regions owned by spans, and spans are always a multiple of 8K, which is a multiple of the allocation granularity on most Windows machines. Change-Id: I3f5ccd63c6bbbd8b7995945ecedee17573b31667 Reviewed-on: https://go-review.googlesource.com/c/153677 Run-TryBot: Michael Knyszek <mknyszek@google.com> Reviewed-by:
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Filippo Valsorda authored
Change-Id: I2a5613377a38815fb8746c5bfb07ccbbc2e6dd0b Reviewed-on: https://go-review.googlesource.com/c/153829Reviewed-by:
Adam Langley <agl@golang.org>
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Filippo Valsorda authored
Change-Id: If65518c76a865c03266be76b1c21c76e1c8b4763 Reviewed-on: https://go-review.googlesource.com/c/153828Reviewed-by:
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Austin Clements authored
This captures the stack trace where mark completion observed that each P had no work, and then dumps this if that P later discovers more work. Hopefully this will help bound where the work was created. For #27993. Change-Id: I4f29202880d22c433482dc1463fb50ab693b6de6 Reviewed-on: https://go-review.googlesource.com/c/154599 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Austin Clements authored
Many of the crashes observed in #27993 involve committing the new _defer object at the end of newdefer. It would be helpful to know if the _defer was just allocated or was retrieved from the defer pool. In order to indicate this in the traceback, this CL duplicates the tail of newdefer so that the PC/line number will tell us whether d is new or not. For #27993. Change-Id: Icd3e23dbcf00461877bb082b6f18df701149a607 Reviewed-on: https://go-review.googlesource.com/c/154598 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Austin Clements authored
Currently we only know the slot address and the value being written in the throwOnGCWork crash tracebacks, and we have to infer the old value from what's dumped by gcWork.checkPut. Sometimes these old values don't make sense, like when we see a write of a nil pointer to a freshly-allocated object, yet we observe marking a value (where did that pointer come from?). This CL adds the old value of the slot and the first two pointers in the buffer to the traceback. For #27993. Change-Id: Ib70eead1afb9c06e8099e520172c3a2acaa45f80 Reviewed-on: https://go-review.googlesource.com/c/154597 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Clément Chigot authored
This commit updates the new symbol addressing made for aix/ppc64 according to feedbacks given in CL 151039. Change-Id: Ic4eb9943dc520d65f7d084adf8fa9a2530f4d3f9 Reviewed-on: https://go-review.googlesource.com/c/151302 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Austin Clements authored
Change-Id: Ifb16fd28105efd05cebbd615b52e45330b77cede Reviewed-on: https://go-review.googlesource.com/c/154600Reviewed-by:
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Robert Griesemer authored
A prior optimization (https://golang.org/cl/106175) removed the generation of unnecessary method expression wrappers, but also eliminated the generation of the wrapper for error.Error which was still required. Special-case error type in the optimization. Fixes #29304. Change-Id: I54c8afc88a2c6d1906afa2d09c68a0a3f3e2f1e3 Reviewed-on: https://go-review.googlesource.com/c/154578Reviewed-by:
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Austin Clements authored
Currently we reset the write barrier buffer before processing the pointers in it. As a result, if there were any write barriers in the code that processes the buffer, it would corrupt the write barrier buffer and cause us to mark objects without later scanning them. As far as I can tell, this shouldn't be happening, but rather than relying on hope (and incomplete static analysis), this CL changes wbBufFlush1 to poison the write barrier buffer while processing it, and only reset it once it's done. Updates #27993. (Unlike many of the other changes for this issue, there's no need to roll back this CL. It's a good change in its own right.) Change-Id: I6d2d9f1b69b89438438b9ee624f3fff9f009e29d Reviewed-on: https://go-review.googlesource.com/c/154537 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Clément Chigot authored
This commit fixes error messages displayed on aix/ppc64 with external linking. Change-Id: I5311d36f30394be717827891e070db249482814a Reviewed-on: https://go-review.googlesource.com/c/151041Reviewed-by:
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Alex Brainman authored
It appears calling GetFileInformationByHandleEx with FILE_ATTRIBUTE_TAG_INFO fails on FAT file system. FAT does not support symlinks, so assume there are no symlnks when GetFileInformationByHandleEx returns ERROR_INVALID_PARAMETER. Fixes #29214 Change-Id: If2d9f3288bd99637681ab5fd4e4581c77b578a69 Reviewed-on: https://go-review.googlesource.com/c/154377 Run-TryBot: Alex Brainman <alex.brainman@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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Joel Sing authored
The OpenBSD armv7 port has working VFPv3 these days - re-enable the VFP detection code so that GOARM=7 is used by default on openbsd/arm. Change-Id: I0271d81c048d2d55becd2803c19e5f1542076357 Reviewed-on: https://go-review.googlesource.com/c/154378Reviewed-by:
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Austin Clements authored
This fixes a few different issues that led to hangs and general flakiness in the TestDebugCall* tests. 1. This fixes missing wake-ups in two error paths of the SIGTRAP signal handler. If the goroutine was in an unknown state, or if there was an unknown debug call status, we currently don't wake the injection coordinator. These are terminal states, so this resulted in a hang. 2. This adds a retry if the target goroutine is in a transient state that prevents us from injecting a call. The most common failure mode here is that the target goroutine is in _Grunnable, but this was previously masked because it deadlocked the test. 3. Related to 2, this switches the "ready" signal from the target goroutine from a blocking channel send to a non-blocking channel send. This makes it much less likely that we'll catch this goroutine while it's in the runtime performing that send. 4. This increases GOMAXPROCS from 2 to 8 during these tests. With the current setting of 2, we can have at most the non-preemptible goroutine we're injecting a call in to and the goroutine that's trying to make it exit. If anything else comes along, it can deadlock. One particular case I observed was in TestDebugCallGC, where runtime.GC() returns before the forEachP that prepares sweeping on all goroutines has finished. When this happens, the forEachP blocks on the non-preemptible loop, which means we now have at least three goroutines that need to run. Fixes #25519. Updates #29124. Change-Id: I7bc41dc0b865b7d0bb379cb654f9a1218bc37428 Reviewed-on: https://go-review.googlesource.com/c/154112 Run-TryBot: Austin Clements <austin@google.com> Reviewed-by:
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- 16 Dec, 2018 1 commit
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Agniva De Sarker authored
Fixes #29271 Change-Id: Iff6a16c659ad6ec1b4d9559fcbcd40196086c60e Reviewed-on: https://go-review.googlesource.com/c/154380 Run-TryBot: Robert Griesemer <gri@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Robert Griesemer <gri@golang.org>
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- 15 Dec, 2018 1 commit
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Elias Naur authored
Similar to to macOS' CF* types and JNI's jobject and derived types, the EGLDisplay type is declared as a pointer but can contain non-pointers (see #27054). Fix it the same way: map EGLDisplay to uintptr in Go. Fixes #27054 RELNOTE=yes Change-Id: I6136f8f8162687c5493b30ed324e29efe55a8fd7 Reviewed-on: https://go-review.googlesource.com/c/154417 Run-TryBot: Elias Naur <elias.naur@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
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