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cmd/addr2line: exit 0 for --help

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This is what pprof expects, or else it won't use the program.
And if it doesn't use the program, it gets very bad results.

Fixes #4818.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7728043
This commit is contained in:
Russ Cox 2013-03-11 18:12:07 -04:00
parent 401e0fea3a
commit d2be8f2948
1 changed files with 15 additions and 4 deletions
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19
src/cmd/addr2line/main.c
View File

@ -11,13 +11,19 @@
#include <bio.h>
#include <mach.h>
void
printusage(int fd)
{
fprint(fd, "usage: addr2line binary\n");
fprint(fd, "reads addresses from standard input and writes two lines for each:\n");
fprint(fd, "\tfunction name\n");
fprint(fd, "\tfile:line\n");
}
void
usage(void)
{
fprint(2, "usage: addr2line binary\n");
fprint(2, "reads addresses from standard input and writes two lines for each:\n");
fprint(2, "\tfunction name\n");
fprint(2, "\tfile:line\n");
printusage(2);
exits("usage");
}
@ -32,6 +38,11 @@ main(int argc, char **argv)
Biobuf bin, bout;
char file[1024];
if(argc > 1 && strcmp(argv[1], "--help") == 0) {
printusage(1);
exits(0);
}
ARGBEGIN{
default:
usage();