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[release-branch.go1.15] runtime: non-strict InlTreeIndex lookup in expandFinalInlineFrame

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This is a follow-up to golang.org/cl/301369, which made the same change
in Frames.Next. The same logic applies here: a profile stack may have
been truncated at an invalid PC provided by cgoTraceback.
expandFinalInlineFrame will then try to lookup the inline tree and
crash.

The same fix applies as well: upon encountering a bad PC, simply leave
it as-is and move on.

For #44971
For #45480
Fixes #45481

Change-Id: I2823c67a1f3425466b05384cc6d30f5fc8ee6ddc
Reviewed-on: https://go-review.googlesource.com/c/go/+/309109
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Trust: Michael Pratt <mpratt@google.com>
(cherry picked from commit aad13cbb74)
Reviewed-on: https://go-review.googlesource.com/c/go/+/309550
Run-TryBot: Michael Pratt <mpratt@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
This commit is contained in:
Michael Pratt 2021-04-09 17:01:45 -04:00 committed by Carlos Amedee
parent 72ccabc994
commit c0a7ecfae7
1 changed files with 3 additions and 1 deletions
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4
src/runtime/symtab.go
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@ -185,7 +185,9 @@ func runtime_expandFinalInlineFrame(stk []uintptr) []uintptr {
var cache pcvalueCache
inltree := (*[1 << 20]inlinedCall)(inldata)
for {
ix := pcdatavalue(f, _PCDATA_InlTreeIndex, tracepc, &cache)
// Non-strict as cgoTraceback may have added bogus PCs
// with a valid funcInfo but invalid PCDATA.
ix := pcdatavalue1(f, _PCDATA_InlTreeIndex, tracepc, &cache, false)
if ix < 0 {
break
}