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| author | Ian Lance Taylor <ian@gcc.gnu.org> | 2019-01-07 20:12:39 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2019-01-07 20:12:39 +0000 |
| commit | 575eb8f58b06657c9cadfe6f7ddfd9e530fe5dea (patch) | |
| tree | ce0dcd8fecef8174761dfaa26962f241b47d9606 /gcc/tree-ssa-loop-prefetch.c | |
| parent | 419af57c134f3b068530ea51179c220e52623067 (diff) | |
| download | gcc-575eb8f58b06657c9cadfe6f7ddfd9e530fe5dea.zip gcc-575eb8f58b06657c9cadfe6f7ddfd9e530fe5dea.tar.gz gcc-575eb8f58b06657c9cadfe6f7ddfd9e530fe5dea.tar.bz2 | |
runtime: in getTraceback, set gp->m before gogo
Currently, when collecting a traceback for another goroutine,
getTraceback calls gogo(gp) switching to gp, which will resume in
mcall, which will call gtraceback, which will set up gp->m. There
is a gap between setting the current running g to gp and setting
gp->m. If a profiling signal arrives in between, sigtramp will
see a non-nil gp with a nil m, and will seg fault. Fix this by
setting up gp->m first.
Fixes golang/go#29448.
Reviewed-on: https://go-review.googlesource.com/c/156038
From-SVN: r267658
Diffstat (limited to 'gcc/tree-ssa-loop-prefetch.c')
0 files changed, 0 insertions, 0 deletions