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avoid infinite loop with GCCGO 

Signed-off-by: Srini Brahmaroutu <srbrahma@us.ibm.com>
This commit is contained in:
root 2015-07-10 18:06:06 +00:00
parent a88b26d3ac
commit 23e3887e05
1 changed files with 5 additions and 1 deletions
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6
libcontainer/stacktrace/capture.go
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@ -9,13 +9,17 @@ func Capture(userSkip int) Stacktrace {
var ( var (
skip = userSkip + 1 // add one for our own function skip = userSkip + 1 // add one for our own function
frames []Frame frames []Frame
prevPc uintptr = 0
) )
for i := skip; ; i++ { for i := skip; ; i++ {
pc, file, line, ok := runtime.Caller(i) pc, file, line, ok := runtime.Caller(i)
if !ok { //detect if caller is repeated to avoid loop, gccgo
//currently runs into a loop without this check
if !ok || pc == prevPc {
break break
} }
frames = append(frames, NewFrame(pc, file, line)) frames = append(frames, NewFrame(pc, file, line))
prevPc = pc
} }
return Stacktrace{ return Stacktrace{
Frames: frames, Frames: frames,