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maple_tree: add debug BUG_ON and WARN_ON variants 

Add debug macros to dump the maple state and/or the tree for both warning
and bug_on calls.

Link: https://lkml.kernel.org/r/20230518145544.1722059-7-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: David Binderman <dcb314@hotmail.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Vernon Yang <vernon2gm@gmail.com>
Cc: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Liam R. Howlett 2023-05-18 10:55:15 -04:00 committed by Andrew Morton
parent 89f499f35c
commit f0a1f866ab
2 changed files with 129 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

98
include/linux/maple_tree.h
View File

@ -482,13 +482,13 @@ static inline void mas_init(struct ma_state *mas, struct maple_tree *tree,
}
/* Checks if a mas has not found anything */
static inline bool mas_is_none(struct ma_state *mas)
static inline bool mas_is_none(const struct ma_state *mas)
{
return mas->node == MAS_NONE;
}
/* Checks if a mas has been paused */
static inline bool mas_is_paused(struct ma_state *mas)
static inline bool mas_is_paused(const struct ma_state *mas)
{
return mas->node == MAS_PAUSE;
}
@ -679,6 +679,8 @@ extern atomic_t maple_tree_tests_run;
extern atomic_t maple_tree_tests_passed;
void mt_dump(const struct maple_tree *mt, enum mt_dump_format format);
void mas_dump(const struct ma_state *mas);
void mas_wr_dump(const struct ma_wr_state *wr_mas);
void mt_validate(struct maple_tree *mt);
void mt_cache_shrink(void);
#define MT_BUG_ON(__tree, __x) do { \
@ -695,8 +697,100 @@ void mt_cache_shrink(void);
atomic_inc(&maple_tree_tests_passed); \
} \
} while (0)
#define MAS_BUG_ON(__mas, __x) do { \
atomic_inc(&maple_tree_tests_run); \
if (__x) { \
pr_info("BUG at %s:%d (%u)\n", \
__func__, __LINE__, __x); \
mas_dump(__mas); \
mt_dump((__mas)->tree, mt_dump_hex); \
pr_info("Pass: %u Run:%u\n", \
atomic_read(&maple_tree_tests_passed), \
atomic_read(&maple_tree_tests_run)); \
dump_stack(); \
} else { \
atomic_inc(&maple_tree_tests_passed); \
} \
} while (0)
#define MAS_WR_BUG_ON(__wrmas, __x) do { \
atomic_inc(&maple_tree_tests_run); \
if (__x) { \
pr_info("BUG at %s:%d (%u)\n", \
__func__, __LINE__, __x); \
mas_wr_dump(__wrmas); \
mas_dump((__wrmas)->mas); \
mt_dump((__wrmas)->mas->tree, mt_dump_hex); \
pr_info("Pass: %u Run:%u\n", \
atomic_read(&maple_tree_tests_passed), \
atomic_read(&maple_tree_tests_run)); \
dump_stack(); \
} else { \
atomic_inc(&maple_tree_tests_passed); \
} \
} while (0)
#define MT_WARN_ON(__tree, __x) ({ \
int ret = !!(__x); \
atomic_inc(&maple_tree_tests_run); \
if (ret) { \
pr_info("WARN at %s:%d (%u)\n", \
__func__, __LINE__, __x); \
mt_dump(__tree, mt_dump_hex); \
pr_info("Pass: %u Run:%u\n", \
atomic_read(&maple_tree_tests_passed), \
atomic_read(&maple_tree_tests_run)); \
dump_stack(); \
} else { \
atomic_inc(&maple_tree_tests_passed); \
} \
unlikely(ret); \
})
#define MAS_WARN_ON(__mas, __x) ({ \
int ret = !!(__x); \
atomic_inc(&maple_tree_tests_run); \
if (ret) { \
pr_info("WARN at %s:%d (%u)\n", \
__func__, __LINE__, __x); \
mas_dump(__mas); \
mt_dump((__mas)->tree, mt_dump_hex); \
pr_info("Pass: %u Run:%u\n", \
atomic_read(&maple_tree_tests_passed), \
atomic_read(&maple_tree_tests_run)); \
dump_stack(); \
} else { \
atomic_inc(&maple_tree_tests_passed); \
} \
unlikely(ret); \
})
#define MAS_WR_WARN_ON(__wrmas, __x) ({ \
int ret = !!(__x); \
atomic_inc(&maple_tree_tests_run); \
if (ret) { \
pr_info("WARN at %s:%d (%u)\n", \
__func__, __LINE__, __x); \
mas_wr_dump(__wrmas); \
mas_dump((__wrmas)->mas); \
mt_dump((__wrmas)->mas->tree, mt_dump_hex); \
pr_info("Pass: %u Run:%u\n", \
atomic_read(&maple_tree_tests_passed), \
atomic_read(&maple_tree_tests_run)); \
dump_stack(); \
} else { \
atomic_inc(&maple_tree_tests_passed); \
} \
unlikely(ret); \
})
#else
#define MT_BUG_ON(__tree, __x) BUG_ON(__x)
#define MAS_BUG_ON(__mas, __x) BUG_ON(__x)
#define MAS_WR_BUG_ON(__mas, __x) BUG_ON(__x)
#define MT_WARN_ON(__tree, __x) WARN_ON(__x)
#define MAS_WARN_ON(__mas, __x) WARN_ON(__x)
#define MAS_WR_WARN_ON(__mas, __x) WARN_ON(__x)
#endif /* CONFIG_DEBUG_MAPLE_TREE */
#endif /*_LINUX_MAPLE_TREE_H */

34
lib/maple_tree.c
View File

@ -240,12 +240,12 @@ static inline void mas_set_err(struct ma_state *mas, long err)
mas->node = MA_ERROR(err);
}
static inline bool mas_is_ptr(struct ma_state *mas)
static inline bool mas_is_ptr(const struct ma_state *mas)
{
return mas->node == MAS_ROOT;
}
static inline bool mas_is_start(struct ma_state *mas)
static inline bool mas_is_start(const struct ma_state *mas)
{
return mas->node == MAS_START;
}
@ -7246,4 +7246,34 @@ done:
}
EXPORT_SYMBOL_GPL(mt_validate);
void mas_dump(const struct ma_state *mas)
{
pr_err("MAS: tree=%p enode=%p ", mas->tree, mas->node);
if (mas_is_none(mas))
pr_err("(MAS_NONE) ");
else if (mas_is_ptr(mas))
pr_err("(MAS_ROOT) ");
else if (mas_is_start(mas))
pr_err("(MAS_START) ");
else if (mas_is_paused(mas))
pr_err("(MAS_PAUSED) ");
pr_err("[%u] index=%lx last=%lx\n", mas->offset, mas->index, mas->last);
pr_err(" min=%lx max=%lx alloc=%p, depth=%u, flags=%x\n",
mas->min, mas->max, mas->alloc, mas->depth, mas->mas_flags);
if (mas->index > mas->last)
pr_err("Check index & last\n");
}
EXPORT_SYMBOL_GPL(mas_dump);
void mas_wr_dump(const struct ma_wr_state *wr_mas)
{
pr_err("WR_MAS: node=%p r_min=%lx r_max=%lx\n",
wr_mas->node, wr_mas->r_min, wr_mas->r_max);
pr_err(" type=%u off_end=%u, node_end=%u, end_piv=%lx\n",
wr_mas->type, wr_mas->offset_end, wr_mas->node_end,
wr_mas->end_piv);
}
EXPORT_SYMBOL_GPL(mas_wr_dump);
#endif /* CONFIG_DEBUG_MAPLE_TREE */