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runtime: improve sigtramp on aix/ppc64 to handle SIGPROF

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R14, R15 must be saved in sigtramp because they might be modified by Go
code when a SIGPROF occurs.

Fixes #28555

Change-Id: I573541f108d7d6aac8e60d33c649e5db943f3ef5
Reviewed-on: https://go-review.googlesource.com/c/go/+/169117
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Clément Chigot 2019-03-25 10:26:44 +01:00 • committed by Ian Lance Taylor
parent e007916cea
commit b5cf035d1c
7 changed files with 35 additions and 45 deletions
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2
src/runtime/proc.go
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@ -3758,7 +3758,7 @@ func sigprof(pc, sp, lr uintptr, gp *g, mp *m) {
// Normal traceback is impossible or has failed.
// See if it falls into several common cases.
n = 0
if (GOOS == "windows" || GOOS == "solaris" || GOOS == "darwin") && mp.libcallg != 0 && mp.libcallpc != 0 && mp.libcallsp != 0 {
if (GOOS == "windows" || GOOS == "solaris" || GOOS == "darwin" || GOOS == "aix") && mp.libcallg != 0 && mp.libcallpc != 0 && mp.libcallsp != 0 {
// Libcall, i.e. runtime syscall on windows.
// Collect Go stack that leads to the call.
n = gentraceback(mp.libcallpc, mp.libcallsp, 0, mp.libcallg.ptr(), 0, &stk[0], len(stk), nil, nil, 0)