- 26 May, 2016 1 commit
-
-
lpy authored
This patch does five things: 1. Extracts sampler as libsampler to provide sampling functionality support. 2. Makes SampleStack virtual so embedders can override the behaviour of sample collecting. 3. Removes sampler.[h|cc]. 4. Moves sampling thread into log.cc as workaround to keep the --prof functionality. 5. Creates SamplerManager to manage the relationship between samplers and threads. The reason we port hashmap.h is that in debug mode, STL containers are using mutexes from a mutex pool, which may lead to deadlock when using asynchronously signal handler. Currently libsampler is used in V8 temporarily. BUG=v8:4789 LOG=n Committed: https://crrev.com/06cc9b7c176a6223971deaa9fbcafe1a05058c7b Cr-Commit-Position: refs/heads/master@{#36527} Review-Url: https://codereview.chromium.org/1922303002 Cr-Commit-Position: refs/heads/master@{#36532}
-
- 25 May, 2016 2 commits
-
-
lpy authored
Revert of Create libsampler as V8 sampler library. (patchset #24 id:460001 of https://codereview.chromium.org/1922303002/ ) Reason for revert: V8 Linux64 TSAN failure because ThreadSanitizer indicated data race. Original issue's description: > Create libsampler as V8 sampler library. > > This patch does five things: > > 1. Extracts sampler as libsampler to provide sampling functionality support. > 2. Makes SampleStack virtual so embedders can override the behaviour of sample collecting. > 3. Removes sampler.[h|cc]. > 4. Moves sampling thread into log.cc as workaround to keep the --prof functionality. > 5. Creates SamplerManager to manage the relationship between samplers and threads. > > The reason we port hashmap.h is that in debug mode, STL containers are using > mutexes from a mutex pool, which may lead to deadlock when using asynchronously > signal handler. > > Currently libsampler is used in V8 temporarily. > > BUG=v8:4789 > LOG=n > > Committed: https://crrev.com/06cc9b7c176a6223971deaa9fbcafe1a05058c7b > Cr-Commit-Position: refs/heads/master@{#36527} TBR=jochen@chromium.org,alph@chromium.org,fmeawad@chromium.org,yangguo@chromium.org # Skipping CQ checks because original CL landed less than 1 days ago. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG=v8:4789 Review-Url: https://codereview.chromium.org/2000323007 Cr-Commit-Position: refs/heads/master@{#36529}
-
lpy authored
This patch does five things: 1. Extracts sampler as libsampler to provide sampling functionality support. 2. Makes SampleStack virtual so embedders can override the behaviour of sample collecting. 3. Removes sampler.[h|cc]. 4. Moves sampling thread into log.cc as workaround to keep the --prof functionality. 5. Creates SamplerManager to manage the relationship between samplers and threads. The reason we port hashmap.h is that in debug mode, STL containers are using mutexes from a mutex pool, which may lead to deadlock when using asynchronously signal handler. Currently libsampler is used in V8 temporarily. BUG=v8:4789 LOG=n Review-Url: https://codereview.chromium.org/1922303002 Cr-Commit-Position: refs/heads/master@{#36527}
-