add a show_backtrace function for debugging.

kernelslacker · Dec 12, 2013 · 20e3caa · 20e3caa
1 parent 33a5f45
commit 20e3caa
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diff --git a/include/utils.h b/include/utils.h
@@ -6,6 +6,8 @@
 #define MB (1024 * 1024UL)
 #define GB (1024 * MB)
 
+void show_backtrace(void);
+
 void * zmalloc(size_t size);
 
 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))

diff --git a/utils.c b/utils.c
@@ -1,8 +1,31 @@
+#include <execinfo.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
+#include <unistd.h>
 #include "utils.h"
 
+void show_backtrace(void)
+{
+	int j, nptrs;
+#define SIZE 100
+	void *buffer[100];
+	char **strings;
+
+	nptrs = backtrace(buffer, SIZE);
+
+	strings = backtrace_symbols(buffer, nptrs);
+	if (strings == NULL) {
+		perror("backtrace_symbols");
+		exit(EXIT_FAILURE);
+	}
+
+	for (j = 0; j < nptrs; j++)
+		printf("%s\n", strings[j]);
+
+	free(strings);
+}
+
 void * zmalloc(size_t size)
 {
 	void *p;