1 files changed, 53 insertions, 1 deletions

diff --git a/tools/perf/util/debug.c b/tools/perf/util/debug.c
index c1838b643108..a5b3777ffee6 100644
--- a/tools/perf/util/debug.c
+++ b/tools/perf/util/debug.c
@@ -2,19 +2,26 @@
 
 #include "../perf.h"
 
+#include <inttypes.h>
 #include <string.h>
 #include <stdarg.h>
 #include <stdio.h>
+#include <sys/wait.h>
 #include <api/debug.h>
 #include <linux/time64.h>
-
+#ifdef HAVE_BACKTRACE_SUPPORT
+#include <execinfo.h>
+#endif
 #include "cache.h"
 #include "color.h"
 #include "event.h"
 #include "debug.h"
+#include "print_binary.h"
 #include "util.h"
 #include "target.h"
 
+#include "sane_ctype.h"
+
 int verbose;
 bool dump_trace = false, quiet = false;
 int debug_ordered_events;
@@ -203,11 +210,28 @@ int perf_debug_option(const char *str)
 		v = (v < 0) || (v > 10) ? 0 : v;
 	}
 
+	if (quiet)
+		v = -1;
+
 	*var->ptr = v;
 	free(s);
 	return 0;
 }
 
+int perf_quiet_option(void)
+{
+	struct debug_variable *var = &debug_variables[0];
+
+	/* disable all debug messages */
+	while (var->name) {
+		*var->ptr = -1;
+		var++;
+	}
+
+	quiet = true;
+	return 0;
+}
+
 #define DEBUG_WRAPPER(__n, __l)				\
 static int pr_ ## __n ## _wrapper(const char *fmt, ...)	\
 {							\
@@ -227,3 +251,31 @@ void perf_debug_setup(void)
 {
 	libapi_set_print(pr_warning_wrapper, pr_warning_wrapper, pr_debug_wrapper);
 }
+
+/* Obtain a backtrace and print it to stdout. */
+#ifdef HAVE_BACKTRACE_SUPPORT
+void dump_stack(void)
+{
+	void *array[16];
+	size_t size = backtrace(array, ARRAY_SIZE(array));
+	char **strings = backtrace_symbols(array, size);
+	size_t i;
+
+	printf("Obtained %zd stack frames.\n", size);
+
+	for (i = 0; i < size; i++)
+		printf("%s\n", strings[i]);
+
+	free(strings);
+}
+#else
+void dump_stack(void) {}
+#endif
+
+void sighandler_dump_stack(int sig)
+{
+	psignal(sig, "perf");
+	dump_stack();
+	signal(sig, SIG_DFL);
+	raise(sig);
+}