perf debug: Move dump_stack() and sighandler_dump_stack() to debug.h

index 6e1d7e1..9eaf86f 100644
@@ -8,7 +8,9 @@
 #include <stdio.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"

@@ -248,3 +250,31 @@ 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);
+}

index 98832f5..8a23ea1 100644
@@ -56,4 +56,7 @@ int perf_debug_option(const char *str);
 void perf_debug_setup(void);
 int perf_quiet_option(void);
 
+void dump_stack(void);
+void sighandler_dump_stack(int sig);
+
 #endif	/* __PERF_DEBUG_H */

index eb49330..ae8036f 100644
@@ -4,9 +4,6 @@
 #include <api/fs/fs.h>
 #include <sys/mman.h>
 #include <sys/utsname.h>
-#ifdef HAVE_BACKTRACE_SUPPORT
-#include <execinfo.h>
-#endif
 #include <dirent.h>
 #include <inttypes.h>
 #include <signal.h>

@@ -353,34 +350,6 @@ int hex2u64(const char *ptr, u64 *long_val)
 	return p - ptr;
 }
 
-/* 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);
-}
-
 unsigned long parse_tag_value(const char *str, struct parse_tag *tags)
 {
 	struct parse_tag *i = tags;

index c3f6d0d..07c4293 100644
@@ -80,9 +80,6 @@ void event_attr_init(struct perf_event_attr *attr);
 size_t hex_width(u64 v);
 int hex2u64(const char *ptr, u64 *val);
 
-void dump_stack(void);
-void sighandler_dump_stack(int sig);
-
 extern unsigned int page_size;
 extern int cacheline_size;
 extern int sysctl_perf_event_max_stack;