assert에 backtrace 추가

원본: https://github.com/mct/junkdrawer/blob/master/c/assert-backtrace.c

assert에 backtrace 추가
원본: https://github.com/mct/junkdrawer/blob/master/c/assert-backtrace.c
김태훈
1 parent c35246804f
Showing 1 changed file with 66 additions and 0 deletions Show diff stats
c/assert-backtrace.c
@@ -0,0 +1,66 @@
+// vim:set ts=4 sw=4 ai et:
+#include <stdio.h>
+#include <execinfo.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <assert.h>
+/*
+
+Compile with "-rdynamic" to include function names in the backtrace output
+
+Example output:
+
+$ gcc -rdynamic -Werror assert-backtrace.c && ./a.out
+Backtrace:
+
+   1   a.out(quux+0x9) [0x55d540c74cd4]
+   2   a.out(qux+0xe) [0x55d540c74d08]
+   3   a.out(baz+0xe) [0x55d540c74d19]
+   4   a.out(bar+0xe) [0x55d540c74d2a]
+   5   a.out(foo+0xe) [0x55d540c74d3b]
+   6   a.out(main+0x19) [0x55d540c74d57]
+   7   /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7fdc6b424b97]
+   8   a.out(_start+0x2a) [0x55d540c74a5a]
+
+a.out: assert-backtrace.c:57: quux: Assertion `0 && "test assertion" || printbt()' failed.
+Aborted (core dumped)
+
+*/
+
+#define assert_bt(...) assert(__VA_ARGS__ || printbt())
+#define STACK_DEPTH   20
+int printbt(void)
+{
+    void *buffer[STACK_DEPTH];
+    char **strings;
+    int size, i;
+
+    size = backtrace(buffer, STACK_DEPTH);
+    strings = backtrace_symbols(buffer, size);
+
+    fprintf(stderr, "Backtrace:\n\n");
+
+    for (i = 1; i < size; i++) {
+        if (strings[i][0] == '.' && strings[i][1] == '/')
+            strings[i] += 2;
+
+        fprintf(stderr, " %3d   %s\n", i, strings[i]);
+    }
+
+    fprintf(stderr, "\n");
+
+    return 0;
+}
+
+void quux() { assert_bt(0 && "test assertion"); }
+void qux() { quux(); }
+void baz() { qux(); }
+void bar() { baz(); }
+void foo() { bar(); }
+
+int main(int argc, char **argv)
+{
+    foo();
+    return 0;
+}
...	...	@@ -0,0 +1,66 @@
	1	+// vim:set ts=4 sw=4 ai et:
	2	+#include <stdio.h>
	3	+#include <execinfo.h>
	4	+#include <signal.h>
	5	+#include <stdlib.h>
	6	+#include <unistd.h>
	7	+#include <assert.h>
	8	+/*
	9	+
	10	+Compile with "-rdynamic" to include function names in the backtrace output
	11	+
	12	+Example output:
	13	+
	14	+$ gcc -rdynamic -Werror assert-backtrace.c && ./a.out
	15	+Backtrace:
	16	+
	17	+ 1 a.out(quux+0x9) [0x55d540c74cd4]
	18	+ 2 a.out(qux+0xe) [0x55d540c74d08]
	19	+ 3 a.out(baz+0xe) [0x55d540c74d19]
	20	+ 4 a.out(bar+0xe) [0x55d540c74d2a]
	21	+ 5 a.out(foo+0xe) [0x55d540c74d3b]
	22	+ 6 a.out(main+0x19) [0x55d540c74d57]
	23	+ 7 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7fdc6b424b97]
	24	+ 8 a.out(_start+0x2a) [0x55d540c74a5a]
	25	+
	26	+a.out: assert-backtrace.c:57: quux: Assertion `0 && "test assertion" \|\| printbt()' failed.
	27	+Aborted (core dumped)
	28	+
	29	+*/
	30	+
	31	+#define assert_bt(...) assert(__VA_ARGS__ \|\| printbt())
	32	+#define STACK_DEPTH 20
	33	+int printbt(void)
	34	+{
	35	+ void *buffer[STACK_DEPTH];
	36	+ char **strings;
	37	+ int size, i;
	38	+
	39	+ size = backtrace(buffer, STACK_DEPTH);
	40	+ strings = backtrace_symbols(buffer, size);
	41	+
	42	+ fprintf(stderr, "Backtrace:\n\n");
	43	+
	44	+ for (i = 1; i < size; i++) {
	45	+ if (strings[i][0] == '.' && strings[i][1] == '/')
	46	+ strings[i] += 2;
	47	+
	48	+ fprintf(stderr, " %3d %s\n", i, strings[i]);
	49	+ }
	50	+
	51	+ fprintf(stderr, "\n");
	52	+
	53	+ return 0;
	54	+}
	55	+
	56	+void quux() { assert_bt(0 && "test assertion"); }
	57	+void qux() { quux(); }
	58	+void baz() { qux(); }
	59	+void bar() { baz(); }
	60	+void foo() { bar(); }
	61	+
	62	+int main(int argc, char **argv)
	63	+{
	64	+ foo();
	65	+ return 0;
	66	+}
...	...