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| author | Cherry Zhang <cherryyz@google.com> | 2020-02-11 15:09:39 -0500 |
|---|---|---|
| committer | Cherry Zhang <cherryyz@google.com> | 2020-02-13 19:49:45 +0000 |
| commit | 3eab754cd061bf90ee7b540546bc0863f3ad1d85 (patch) | |
| tree | af3dc202cb9218aae18787578b0547ea013c5c36 /src/runtime/sys_linux_386.s | |
| parent | 123f7dd3e1eb90825ece57b8dde39438ca34f150 (diff) | |
| download | go-3eab754cd061bf90ee7b540546bc0863f3ad1d85.tar.gz go-3eab754cd061bf90ee7b540546bc0863f3ad1d85.zip | |
runtime: correct caller PC/SP offsets in walltime1/nanotime1
In walltime1/nanotime1, we save the caller's PC and SP for stack
unwinding. The code does that assumed zero frame size. Now that
the frame size is not zero, correct the offset. Rewrite it in a
way that doesn't depend on hard-coded frame size.
May fix #37127.
Change-Id: I47d6d54fc3499d7d5946c3f6a2dbd24fbd679de1
Reviewed-on: https://go-review.googlesource.com/c/go/+/219118
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Diffstat (limited to 'src/runtime/sys_linux_386.s')
| -rw-r--r-- | src/runtime/sys_linux_386.s | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/src/runtime/sys_linux_386.s b/src/runtime/sys_linux_386.s index 8e05acf894..1b28098ad9 100644 --- a/src/runtime/sys_linux_386.s +++ b/src/runtime/sys_linux_386.s @@ -233,9 +233,9 @@ TEXT runtime·walltime1(SB), NOSPLIT, $0-12 MOVL g_m(AX), SI // SI unchanged by C code. // Set vdsoPC and vdsoSP for SIGPROF traceback. - MOVL 0(SP), DX - MOVL DX, m_vdsoPC(SI) - LEAL sec+0(SP), DX + LEAL sec+0(FP), DX + MOVL -4(DX), CX + MOVL CX, m_vdsoPC(SI) MOVL DX, m_vdsoSP(SI) CMPL AX, m_curg(SI) // Only switch if on curg. @@ -296,9 +296,9 @@ TEXT runtime·nanotime1(SB), NOSPLIT, $0-8 MOVL g_m(AX), SI // SI unchanged by C code. // Set vdsoPC and vdsoSP for SIGPROF traceback. - MOVL 0(SP), DX - MOVL DX, m_vdsoPC(SI) - LEAL ret+0(SP), DX + LEAL ret+0(FP), DX + MOVL -4(DX), CX + MOVL CX, m_vdsoPC(SI) MOVL DX, m_vdsoSP(SI) CMPL AX, m_curg(SI) // Only switch if on curg. |