diff options
author | Dmitriy Vyukov <dvyukov@google.com> | 2014-09-03 20:47:30 +0400 |
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committer | Dmitriy Vyukov <dvyukov@google.com> | 2014-09-03 20:47:30 +0400 |
commit | 7b20cd40e5da2f97b136ff0e6193b08ef0d7085b (patch) | |
tree | aa8443c2d1f827c99c1338a93bc2b41d05554466 /src | |
parent | 548977c7411fb5511eb315420d24fdd0f72ed7a3 (diff) | |
download | go-7b20cd40e5da2f97b136ff0e6193b08ef0d7085b.tar.gz |
runtime: adopt race detector for runtime written in Go
Ignore memory access on g0/gsignal.
See the issue for context and explanation.
Fixes issue 8627.
LGTM=khr
R=golang-codereviews, mdempsky, khr
CC=golang-codereviews, rsc
https://codereview.appspot.com/137070043
Diffstat (limited to 'src')
-rw-r--r-- | src/pkg/runtime/cpuprof.go | 10 | ||||
-rw-r--r-- | src/pkg/runtime/proc.c | 8 | ||||
-rw-r--r-- | src/pkg/runtime/race.c | 10 |
3 files changed, 18 insertions, 10 deletions
diff --git a/src/pkg/runtime/cpuprof.go b/src/pkg/runtime/cpuprof.go index b397eafbe..4325d7e1c 100644 --- a/src/pkg/runtime/cpuprof.go +++ b/src/pkg/runtime/cpuprof.go @@ -239,9 +239,7 @@ Assoc: // Reuse the newly evicted entry. e.depth = uintptr(len(pc)) e.count = 1 - for i := range pc { - e.stack[i] = pc[i] - } + copy(e.stack[:], pc) } // evict copies the given entry's data into the log, so that @@ -266,10 +264,8 @@ func (p *cpuProfile) evict(e *cpuprofEntry) bool { q++ log[q] = d q++ - for i := uintptr(0); i < d; i++ { - log[q] = e.stack[i] - q++ - } + copy(log[q:], e.stack[:d]) + q += d p.nlog = q e.count = 0 return true diff --git a/src/pkg/runtime/proc.c b/src/pkg/runtime/proc.c index 53d3d23d1..b159215d1 100644 --- a/src/pkg/runtime/proc.c +++ b/src/pkg/runtime/proc.c @@ -214,7 +214,11 @@ void runtime·main(void) { Defer d; - + + // Racectx of m0->g0 is used only as the parent of the main goroutine. + // It must not be used for anything else. + g->m->g0->racectx = 0; + // Max stack size is 1 GB on 64-bit, 250 MB on 32-bit. // Using decimal instead of binary GB and MB because // they look nicer in the stack overflow failure message. @@ -1166,8 +1170,6 @@ newm(void(*fn)(void), P *p) mp = runtime·allocm(p); mp->nextp = p; mp->mstartfn = fn; - if(raceenabled) - mp->g0->racectx = runtime·racegostart(newm); if(runtime·iscgo) { CgoThreadStart ts; diff --git a/src/pkg/runtime/race.c b/src/pkg/runtime/race.c index a773addb0..d5e77c756 100644 --- a/src/pkg/runtime/race.c +++ b/src/pkg/runtime/race.c @@ -153,6 +153,11 @@ runtime·racegoend(void) void runtime·racewriterangepc(void *addr, uintptr sz, void *callpc, void *pc) { + if(g != g->m->curg) { + // The call is coming from manual instrumentation of Go code running on g0/gsignal. + // Not interesting. + return; + } if(callpc != nil) runtime·racefuncenter(callpc); runtime·racewriterangepc1(addr, sz, pc); @@ -163,6 +168,11 @@ runtime·racewriterangepc(void *addr, uintptr sz, void *callpc, void *pc) void runtime·racereadrangepc(void *addr, uintptr sz, void *callpc, void *pc) { + if(g != g->m->curg) { + // The call is coming from manual instrumentation of Go code running on g0/gsignal. + // Not interesting. + return; + } if(callpc != nil) runtime·racefuncenter(callpc); runtime·racereadrangepc1(addr, sz, pc); |