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re PR go/67101 (mprof.goc:408:5: error: calling ‘__builtin_frame_address’ with a nonzero argument is unsafe [-Werror=frame-address])

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PR go/67101

    runtime: Remove call to __builtin_frame_address.
    
    __builtin_frame_address was only supposed to use nonzero arguments
    for debugging purposes.  Calling it with nonzero arguments can have
    unpredictable results and uses are now marked unsafe when
    -Wframe-address is enabled.
    
    Reviewed-on: https://go-review.googlesource.com/13063

From-SVN: r226525
This commit is contained in:
Ian Lance Taylor 2015-08-03 17:54:50 +00:00
parent 8a9212788d
commit 3d6d2a63b2
2 changed files with 2 additions and 4 deletions
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2
gcc/go/gofrontend/MERGE
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@ -1,4 +1,4 @@
2bf7c643a1d2f8503070c8e6cb87852026e32400
d5aad2f400a0f21724e33e4ae48e1583ed8b1a87
The first line of this file holds the git revision number of the last
merge done from the gofrontend repository.

4
libgo/runtime/mprof.goc
View file

@ -402,10 +402,9 @@ func ThreadCreateProfile(p Slice) (n int, ok bool) {
}
func Stack(b Slice, all bool) (n int) {
byte *pc, *sp;
byte *pc;
bool enablegc;
sp = runtime_getcallersp(&b);
pc = (byte*)(uintptr)runtime_getcallerpc(&b);
if(all) {
@ -423,7 +422,6 @@ func Stack(b Slice, all bool) (n int) {
g->writebuf = (byte*)b.__values;
g->writenbuf = b.__count;
USED(pc);
USED(sp);
runtime_goroutineheader(g);
runtime_traceback();
runtime_printcreatedby(g);