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runtime: don't stat a NULL filename 

Noticed in https://gcc.gnu.org/PR86331.
    
    Reviewed-on: https://go-review.googlesource.com/121417

From-SVN: r262234
This commit is contained in:
Ian Lance Taylor 2018-06-28 20:54:04 +00:00
parent eacb16dc79
commit 94e12bd4d9
2 changed files with 2 additions and 2 deletions
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2
gcc/go/gofrontend/MERGE
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@ -1,4 +1,4 @@
baaaf1e0f1e9a54ea2dfe475154c85c83ec03740 e1fcce0aec27b1f50ac0e736f39f4c806c2a5baa
The first line of this file holds the git revision number of the last The first line of this file holds the git revision number of the last
merge done from the gofrontend repository. merge done from the gofrontend repository.

2
libgo/runtime/go-caller.c
View File

@ -116,7 +116,7 @@ __go_get_backtrace_state ()
argv[0] (http://gcc.gnu.org/PR61895). It would be nice to argv[0] (http://gcc.gnu.org/PR61895). It would be nice to
have a better check for whether this file is the real have a better check for whether this file is the real
executable. */ executable. */
if (stat (filename, &s) < 0 || s.st_size < 1024) if (filename != NULL && (stat (filename, &s) < 0 || s.st_size < 1024))
filename = NULL; filename = NULL;
back_state = backtrace_create_state (filename, 1, error_callback, NULL); back_state = backtrace_create_state (filename, 1, error_callback, NULL);