diff options
| author | Josef Bacik <jbacik@fb.com> | 2014-09-25 16:07:10 -0400 |
|---|---|---|
| committer | David Sterba <dsterba@suse.cz> | 2014-10-01 16:34:29 +0200 |
| commit | 3ae0209d94776faaa139fcebfafa22fd7840b9f4 (patch) | |
| tree | aff0995e2e6bb3614f1a40e4bf1648ede9c341b0 /kerncompat.h | |
| parent | afc850dd13e672db63f6ba1faab9d4da6182f5b8 (diff) | |
Btrfs-progs: make BUG*() be more verbose
Currently these macros just tie to assert(), which gives us line number and such
but no backtrace so no actual context. This patch adds support for spitting out
a backtrace so we can see how we got to the given assert. Thanks,
Signed-off-by: Josef Bacik <jbacik@fb.com>
[backtrace_symbols_fd]
Signed-off-by: Naohiro Aota <naota@elisp.net>
[minor fixups]
Signed-off-by: David Sterba <dsterba@suse.cz>
Diffstat (limited to 'kerncompat.h')
| -rw-r--r-- | kerncompat.h | 36 |
1 files changed, 32 insertions, 4 deletions
diff --git a/kerncompat.h b/kerncompat.h index bb03194e..19c7fa51 100644 --- a/kerncompat.h +++ b/kerncompat.h @@ -29,6 +29,7 @@ #include <stddef.h> #include <linux/types.h> #include <stdint.h> +#include <execinfo.h> #define ptr_to_u64(x) ((u64)(uintptr_t)x) #define u64_to_ptr(x) ((void *)(uintptr_t)x) @@ -54,7 +55,33 @@ #define ULONG_MAX (~0UL) #endif -#define BUG() assert(0) +#define MAX_BACKTRACE 16 +static inline void print_trace(void) +{ + void *array[MAX_BACKTRACE]; + size_t size; + + size = backtrace(array, MAX_BACKTRACE); + backtrace_symbols_fd(array, size, 2); +} + +static inline void assert_trace(const char *assertion, const char *filename, + const char *func, unsigned line, int val) +{ + if (val) + return; + if (assertion) + fprintf(stderr, "%s:%d: %s: Assertion `%s` failed.\n", + filename, line, func, assertion); + else + fprintf(stderr, "%s:%d: %s: Assertion failed.\n", filename, + line, func); + print_trace(); + exit(1); +} + +#define BUG() assert_trace(NULL, __FILE__, __func__, __LINE__, 0) + #ifdef __CHECKER__ #define __force __attribute__((force)) #define __bitwise__ __attribute__((bitwise)) @@ -237,9 +264,10 @@ static inline long IS_ERR(const void *ptr) #define kstrdup(x, y) strdup(x) #define kfree(x) free(x) -#define BUG_ON(c) assert(!(c)) -#define WARN_ON(c) assert(!(c)) -#define ASSERT(c) assert(c) +#define BUG_ON(c) assert_trace(#c, __FILE__, __func__, __LINE__, !(c)) + +#define WARN_ON(c) BUG_ON(c) +#define ASSERT(c) assert_trace(#c, __FILE__, __func__, __LINE__, (c)) #define container_of(ptr, type, member) ({ \ const typeof( ((type *)0)->member ) *__mptr = (ptr); \ |