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infra: improve tatomic debugging

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This commit is contained in:
Thomas Schoebel-Theuer 2013-04-12 10:55:51 +02:00
parent af0c99abf1
commit d1abe646a6
2 changed files with 13 additions and 11 deletions
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22
kernel/brick_atomic.h
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@ -24,8 +24,9 @@ typedef struct tatomic {
typedef struct atomic_trace {
#ifdef ATOMIC_DEBUGGING
atomic_t at_count;
short at_lines[ATOMIC_MAXTRACE];
atomic_t at_count;
short at_lines[ATOMIC_MAXTRACE];
const char *at_sources[ATOMIC_MAXTRACE];
#endif
} atomic_trace_t;
@ -34,8 +35,9 @@ typedef struct atomic_trace {
#define tatomic_trace(_at, _cmd) \
({ \
int _index = atomic_add_return(1, &(_at)->at_count) - 1; \
if (_index >= 0 && _index < ATOMIC_MAXTRACE) { \
if (likely(_index >= 0 && _index < ATOMIC_MAXTRACE)) { \
(_at)->at_lines[_index] = __LINE__; \
(_at)->at_sources[_index] = __BASE_FILE__; \
} \
_cmd; \
})
@ -45,19 +47,19 @@ typedef struct atomic_trace {
int __i; \
int __max = atomic_read(&(_at)->at_count); \
_MSG("at_count = %d\n", __max); \
if (__max > ATOMIC_MAXTRACE) \
if (unlikely(__max > ATOMIC_MAXTRACE)) \
__max = ATOMIC_MAXTRACE; \
for (__i = 0; __i < __max; __i++) { \
_MSG("%2d %4d\n", __i, (_at)->at_lines[__i]); \
_MSG("%2d %s:%d\n", __i, (_at)->at_sources[__i], (_at)->at_lines[__i]); \
} \
})
#define _CHECK_TATOMIC(_at,_atom,OP,_minval) \
#define _CHECK_TATOMIC(_at,_atom,OP,_minval,_fixval) \
do { \
if (BRICK_CHECKING) { \
int __test = atomic_read(&(_atom)->ta_atomic); \
if (__test OP (_minval)) { \
atomic_set(&(_atom)->ta_atomic, _minval); \
if (unlikely(__test OP (_minval))) { \
atomic_set(&(_atom)->ta_atomic, _fixval); \
BRICK_ERR("%d: tatomic " #_atom " " #OP " " #_minval " (%d)\n", __LINE__, __test); \
tatomic_out(_at, BRICK_DMP); \
} \
@ -68,13 +70,13 @@ do { \
#define tatomic_trace(_at,_cmd) _cmd
#define _CHECK_TATOMIC(_at,_atom,OP,_minval) \
#define _CHECK_TATOMIC(_at,_atom,OP,_minval,_fixval) \
_CHECK_ATOMIC(&(_atom)->ta_atomic, OP, _minval)
#endif
#define CHECK_TATOMIC(_at,_atom,_minval) \
_CHECK_TATOMIC(_at, _atom, <, _minval)
_CHECK_TATOMIC(_at, _atom, <, _minval, _minval)
#define tatomic_inc(at,a) tatomic_trace(at, atomic_inc(&(a)->ta_atomic))
#define tatomic_dec(at,a) tatomic_trace(at, atomic_dec(&(a)->ta_atomic))

2
kernel/mars.h
View File

@ -143,7 +143,7 @@ struct mref_object {
if (unlikely(BRICK_CHECKING && (mref)->ref_initialized)) { \
MARS_ERR("mref %p is already initialized\n", (mref)); \
} \
_CHECK_TATOMIC(&(mref)->ref_at, &(mref)->ref_count, !=, 0); \
_CHECK_TATOMIC(&(mref)->ref_at, &(mref)->ref_count, !=, 0, 0); \
(mref)->ref_initialized = true; \
tatomic_inc(&(mref)->ref_at, &(mref)->ref_count); \
})