Suppress SIGPROF

We don't handle it well -- the exact reason is unclear, but threading seems to trigger it -- so just squelch it. Building with -pg is necessary for getting call-graph information with e.g. the Linux 'perf' profiler. But -pg also causes the libc startup routine to set a SIGPROF timer. That doesn't serve any purpose with a modern profiler like 'perf'; it was used by 'gprof'.
gnprice · Nov 20, 2012 · 98fc9cd · 98fc9cd
1 parent 7e96fb2
commit 98fc9cd
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/main.c b/main.c
@@ -18,6 +18,7 @@
 #ifdef RUBY_DEBUG_ENV
 #include <stdlib.h>
 #endif
+#include <sys/time.h>
 
 int
 main(int argc, char **argv)
@@ -29,6 +30,11 @@ main(int argc, char **argv)
     setlocale(LC_CTYPE, "");
 #endif
 
+    {
+	struct itimerval itimer = {{0, 0}, {0, 0}};
+	setitimer(ITIMER_PROF, &itimer, NULL);
+    }
+
     ruby_sysinit(&argc, &argv);
     {
 	RUBY_INIT_STACK;