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Diffstat (limited to 'erts/emulator/beam/erl_lock_check.c')
-rw-r--r--erts/emulator/beam/erl_lock_check.c280
1 files changed, 154 insertions, 126 deletions
diff --git a/erts/emulator/beam/erl_lock_check.c b/erts/emulator/beam/erl_lock_check.c
index 85ee703c99..cf091ee43f 100644
--- a/erts/emulator/beam/erl_lock_check.c
+++ b/erts/emulator/beam/erl_lock_check.c
@@ -200,41 +200,20 @@ static erts_lc_lock_order_t erts_lock_order[] = {
#define ERTS_LOCK_ORDER_SIZE \
(sizeof(erts_lock_order)/sizeof(erts_lc_lock_order_t))
-#define LOCK_IS_TYPE_ORDER_VIOLATION(LCK_FLG, LCKD_FLG) \
- (((LCKD_FLG) & (ERTS_LC_FLG_LT_SPINLOCK|ERTS_LC_FLG_LT_RWSPINLOCK)) \
- && ((LCK_FLG) \
- & ERTS_LC_FLG_LT_ALL \
- & ~(ERTS_LC_FLG_LT_SPINLOCK|ERTS_LC_FLG_LT_RWSPINLOCK)))
+#define LOCK_IS_TYPE_ORDER_VIOLATION(LCK_FLG, LCKD_FLG) \
+ (((LCKD_FLG) & ERTS_LOCK_FLAGS_MASK_TYPE) == ERTS_LOCK_FLAGS_TYPE_SPINLOCK \
+ && \
+ ((LCK_FLG) & ERTS_LOCK_FLAGS_MASK_TYPE) != ERTS_LOCK_FLAGS_TYPE_SPINLOCK)
static __decl_noreturn void __noreturn lc_abort(void);
-static char *
-lock_type(Uint16 flags)
+static const char *rw_op_str(erts_lock_options_t options)
{
- switch (flags & ERTS_LC_FLG_LT_ALL) {
- case ERTS_LC_FLG_LT_SPINLOCK: return "[spinlock]";
- case ERTS_LC_FLG_LT_RWSPINLOCK: return "[rw(spin)lock]";
- case ERTS_LC_FLG_LT_MUTEX: return "[mutex]";
- case ERTS_LC_FLG_LT_RWMUTEX: return "[rwmutex]";
- case ERTS_LC_FLG_LT_PROCLOCK: return "[proclock]";
- default: return "";
+ if(options == ERTS_LOCK_OPTIONS_WRITE) {
+ ERTS_INTERNAL_ERROR("Only write flag present");
}
-}
-static char *
-rw_op_str(Uint16 flags)
-{
- switch (flags & ERTS_LC_FLG_LO_READ_WRITE) {
- case ERTS_LC_FLG_LO_READ_WRITE:
- return " (rw)";
- case ERTS_LC_FLG_LO_READ:
- return " (r)";
- case ERTS_LC_FLG_LO_WRITE:
- ERTS_INTERNAL_ERROR("Only write flag present");
- default:
- break;
- }
- return "";
+ return erts_lock_options_get_short_desc(options);
}
typedef struct erts_lc_locked_lock_t_ erts_lc_locked_lock_t;
@@ -245,7 +224,8 @@ struct erts_lc_locked_lock_t_ {
Sint16 id;
char *file;
unsigned int line;
- Uint16 flags;
+ erts_lock_flags_t flags;
+ erts_lock_options_t taken_options;
};
typedef struct {
@@ -432,7 +412,7 @@ make_my_locked_locks(void)
}
static ERTS_INLINE erts_lc_locked_lock_t *
-new_locked_lock(erts_lc_lock_t *lck, Uint16 op_flags,
+new_locked_lock(erts_lc_lock_t *lck, erts_lock_options_t options,
char *file, unsigned int line)
{
erts_lc_locked_lock_t *l_lck = (erts_lc_locked_lock_t *) lc_alloc();
@@ -442,12 +422,13 @@ new_locked_lock(erts_lc_lock_t *lck, Uint16 op_flags,
l_lck->extra = lck->extra;
l_lck->file = file;
l_lck->line = line;
- l_lck->flags = lck->flags | op_flags;
+ l_lck->flags = lck->flags;
+ l_lck->taken_options = options;
return l_lck;
}
static void
-raw_print_lock(char *prefix, Sint16 id, Wterm extra, Uint16 flags,
+raw_print_lock(char *prefix, Sint16 id, Wterm extra, erts_lock_flags_t flags,
char* file, unsigned int line, char *suffix)
{
char *lname = (0 <= id && id < ERTS_LOCK_ORDER_SIZE
@@ -459,16 +440,16 @@ raw_print_lock(char *prefix, Sint16 id, Wterm extra, Uint16 flags,
erts_fprintf(stderr,"%p",_unchecked_boxed_val(extra));
else
erts_fprintf(stderr,"%T",extra);
- erts_fprintf(stderr,"%s",lock_type(flags));
+ erts_fprintf(stderr,"[%s]",erts_lock_flags_get_type_name(flags));
if (file)
erts_fprintf(stderr,"(%s:%d)",file,line);
- erts_fprintf(stderr,"'%s%s",rw_op_str(flags),suffix);
+ erts_fprintf(stderr,"'(%s)%s",rw_op_str(flags),suffix);
}
static void
-print_lock2(char *prefix, Sint16 id, Wterm extra, Uint16 flags, char *suffix)
+print_lock2(char *prefix, Sint16 id, Wterm extra, erts_lock_flags_t flags, char *suffix)
{
raw_print_lock(prefix, id, extra, flags, NULL, 0, suffix);
}
@@ -523,9 +504,9 @@ uninitialized_lock(void)
static void
lock_twice(char *prefix, erts_lc_locked_locks_t *l_lcks, erts_lc_lock_t *lck,
- Uint16 op_flags)
+ erts_lock_options_t options)
{
- erts_fprintf(stderr, "%s%s", prefix, rw_op_str(op_flags));
+ erts_fprintf(stderr, "%s (%s)", prefix, rw_op_str(options));
print_lock(" ", lck, " lock which is already locked by thread!\n");
print_curr_locks(l_lcks);
lc_abort();
@@ -533,9 +514,9 @@ lock_twice(char *prefix, erts_lc_locked_locks_t *l_lcks, erts_lc_lock_t *lck,
static void
unlock_op_mismatch(erts_lc_locked_locks_t *l_lcks, erts_lc_lock_t *lck,
- Uint16 op_flags)
+ erts_lock_options_t options)
{
- erts_fprintf(stderr, "Unlocking%s ", rw_op_str(op_flags));
+ erts_fprintf(stderr, "Unlocking (%s) ", rw_op_str(options));
print_lock("", lck, " lock which mismatch previous lock operation!\n");
print_curr_locks(l_lcks);
lc_abort();
@@ -746,84 +727,128 @@ erts_lc_get_lock_order_id(char *name)
return (Sint16) -1;
}
+static int compare_locked_by_id(erts_lc_locked_lock_t *locked_lock, erts_lc_lock_t *comparand)
+{
+ if(locked_lock->id < comparand->id) {
+ return -1;
+ } else if(locked_lock->id > comparand->id) {
+ return 1;
+ }
-static int
-find_lock(erts_lc_locked_lock_t **l_lcks, erts_lc_lock_t *lck)
+ return 0;
+}
+
+static int compare_locked_by_id_extra(erts_lc_locked_lock_t *locked_lock, erts_lc_lock_t *comparand)
{
- erts_lc_locked_lock_t *l_lck = *l_lcks;
+ int order = compare_locked_by_id(locked_lock, comparand);
+
+ if(order) {
+ return order;
+ } else if(locked_lock->extra < comparand->extra) {
+ return -1;
+ } else if(locked_lock->extra > comparand->extra) {
+ return 1;
+ }
- if (l_lck) {
- if (l_lck->id == lck->id && l_lck->extra == lck->extra) {
- if ((l_lck->flags & lck->flags) == lck->flags)
- return 1;
- return 0;
- }
- else if (l_lck->id < lck->id
- || (l_lck->id == lck->id
- && l_lck->extra < lck->extra)) {
- for (l_lck = l_lck->next; l_lck; l_lck = l_lck->next) {
- if (l_lck->id > lck->id
- || (l_lck->id == lck->id
- && l_lck->extra >= lck->extra)) {
- *l_lcks = l_lck;
- if (l_lck->id == lck->id
- && l_lck->extra == lck->extra
- && ((l_lck->flags & lck->flags) == lck->flags))
- return 1;
- return 0;
- }
- }
- }
- else {
- for (l_lck = l_lck->prev; l_lck; l_lck = l_lck->prev) {
- if (l_lck->id < lck->id
- || (l_lck->id == lck->id
- && l_lck->extra <= lck->extra)) {
- *l_lcks = l_lck;
- if (l_lck->id == lck->id
- && l_lck->extra == lck->extra
- && ((l_lck->flags & lck->flags) == lck->flags))
- return 1;
- return 0;
- }
- }
- }
+ return 0;
+}
+
+typedef int (*locked_compare_func)(erts_lc_locked_lock_t *, erts_lc_lock_t *);
+
+/* Searches through a list of taken locks, bailing when it hits an entry whose
+ * order relative to the search template is the opposite of the one at the
+ * start of the search. (*closest_neighbor) is either set to the exact match,
+ * or the one closest to it in the sort order. */
+static int search_locked_list(locked_compare_func compare,
+ erts_lc_locked_lock_t *locked_locks,
+ erts_lc_lock_t *search_template,
+ erts_lc_locked_lock_t **closest_neighbor)
+{
+ erts_lc_locked_lock_t *iterator = locked_locks;
+
+ (*closest_neighbor) = iterator;
+
+ if(iterator) {
+ int relative_order = compare(iterator, search_template);
+
+ if(relative_order < 0) {
+ while((iterator = iterator->next) != NULL) {
+ relative_order = compare(iterator, search_template);
+
+ if(relative_order >= 0) {
+ (*closest_neighbor) = iterator;
+ break;
+ }
+ }
+ } else if(relative_order > 0) {
+ while((iterator = iterator->prev) != NULL) {
+ relative_order = compare(iterator, search_template);
+
+ if(relative_order <= 0) {
+ (*closest_neighbor) = iterator;
+ break;
+ }
+ }
+ }
+
+ return relative_order == 0;
}
+
return 0;
}
+/* Searches for a lock in the given list that matches search_template, and sets
+ * (*locked_locks) to the closest lock in the sort order. */
static int
-find_id(erts_lc_locked_lock_t **l_lcks, Sint16 id)
-{
- erts_lc_locked_lock_t *l_lck = *l_lcks;
-
- if (l_lck) {
- if (l_lck->id == id)
- return 1;
- else if (l_lck->id < id) {
- for (l_lck = l_lck->next; l_lck; l_lck = l_lck->next) {
- if (l_lck->id >= id) {
- *l_lcks = l_lck;
- if (l_lck->id == id)
- return 1;
- return 0;
- }
- }
- }
- else {
- for (l_lck = l_lck->prev; l_lck; l_lck = l_lck->prev) {
- if (l_lck->id <= id) {
- *l_lcks = l_lck;
- if (l_lck->id == id)
- return 1;
- return 0;
- }
- }
- }
+find_lock(erts_lc_locked_lock_t **locked_locks, erts_lc_lock_t *search_template)
+{
+ erts_lc_locked_lock_t *closest_neighbor;
+ int found_lock;
+
+ found_lock = search_locked_list(compare_locked_by_id_extra,
+ (*locked_locks),
+ search_template,
+ &closest_neighbor);
+
+ (*locked_locks) = closest_neighbor;
+
+ if(found_lock) {
+ erts_lock_options_t relevant_options;
+ erts_lock_flags_t relevant_flags;
+
+ /* We only care about the options and flags that are set in the
+ * template. */
+ relevant_options = (closest_neighbor->taken_options & search_template->taken_options);
+ relevant_flags = (closest_neighbor->flags & search_template->flags);
+
+ return search_template->taken_options == relevant_options &&
+ search_template->flags == relevant_flags;
}
+
return 0;
}
+/* Searches for a lock in the given list by id, and sets (*locked_locks) to the
+ * closest lock in the sort order. */
+static int
+find_id(erts_lc_locked_lock_t **locked_locks, Sint16 id)
+{
+ erts_lc_locked_lock_t *closest_neighbor;
+ erts_lc_lock_t search_template;
+ int found_lock;
+
+ search_template.id = id;
+
+ found_lock = search_locked_list(compare_locked_by_id,
+ (*locked_locks),
+ &search_template,
+ &closest_neighbor);
+
+ (*locked_locks) = closest_neighbor;
+
+ return found_lock;
+}
+
void
erts_lc_have_locks(int *resv, erts_lc_lock_t *locks, int len)
{
@@ -919,17 +944,17 @@ erts_lc_check_exact(erts_lc_lock_t *have, int have_len)
}
void
-erts_lc_check_no_locked_of_type(Uint16 flags)
+erts_lc_check_no_locked_of_type(erts_lock_flags_t type)
{
erts_lc_locked_locks_t *l_lcks = get_my_locked_locks();
if (l_lcks) {
erts_lc_locked_lock_t *l_lck = l_lcks->locked.first;
for (l_lck = l_lcks->locked.first; l_lck; l_lck = l_lck->next) {
- if (l_lck->flags & flags) {
+ if ((l_lck->flags & ERTS_LOCK_FLAGS_MASK_TYPE) == type) {
erts_fprintf(stderr,
"Locked lock of type %s found which isn't "
"allowed here!\n",
- lock_type(l_lck->flags));
+ erts_lock_flags_get_type_name(l_lck->flags));
print_curr_locks(l_lcks);
lc_abort();
}
@@ -938,7 +963,7 @@ erts_lc_check_no_locked_of_type(Uint16 flags)
}
int
-erts_lc_trylock_force_busy_flg(erts_lc_lock_t *lck, Uint16 op_flags)
+erts_lc_trylock_force_busy_flg(erts_lc_lock_t *lck, erts_lock_options_t options)
{
#ifdef ERTS_LC_DO_NOT_FORCE_BUSY_TRYLOCK_ON_LOCK_ORDER_VIOLATION
return 0;
@@ -987,7 +1012,7 @@ erts_lc_trylock_force_busy_flg(erts_lc_lock_t *lck, Uint16 op_flags)
if (tl_lck->id < lck->id
|| (tl_lck->id == lck->id && tl_lck->extra <= lck->extra)) {
if (tl_lck->id == lck->id && tl_lck->extra == lck->extra)
- lock_twice("Trylocking", l_lcks, lck, op_flags);
+ lock_twice("Trylocking", l_lcks, lck, options);
break;
}
}
@@ -1009,7 +1034,7 @@ erts_lc_trylock_force_busy_flg(erts_lc_lock_t *lck, Uint16 op_flags)
#endif
}
-void erts_lc_trylock_flg_x(int locked, erts_lc_lock_t *lck, Uint16 op_flags,
+void erts_lc_trylock_flg_x(int locked, erts_lc_lock_t *lck, erts_lock_options_t options,
char *file, unsigned int line)
{
erts_lc_locked_locks_t *l_lcks;
@@ -1022,7 +1047,7 @@ void erts_lc_trylock_flg_x(int locked, erts_lc_lock_t *lck, Uint16 op_flags,
return;
l_lcks = make_my_locked_locks();
- l_lck = locked ? new_locked_lock(lck, op_flags, file, line) : NULL;
+ l_lck = locked ? new_locked_lock(lck, options, file, line) : NULL;
if (!l_lcks->locked.last) {
ASSERT(!l_lcks->locked.first);
@@ -1040,7 +1065,7 @@ void erts_lc_trylock_flg_x(int locked, erts_lc_lock_t *lck, Uint16 op_flags,
if (tl_lck->id < lck->id
|| (tl_lck->id == lck->id && tl_lck->extra <= lck->extra)) {
if (tl_lck->id == lck->id && tl_lck->extra == lck->extra)
- lock_twice("Trylocking", l_lcks, lck, op_flags);
+ lock_twice("Trylocking", l_lcks, lck, options);
if (locked) {
l_lck->next = tl_lck->next;
l_lck->prev = tl_lck;
@@ -1063,14 +1088,14 @@ void erts_lc_trylock_flg_x(int locked, erts_lc_lock_t *lck, Uint16 op_flags,
}
-void erts_lc_require_lock_flg(erts_lc_lock_t *lck, Uint16 op_flags,
+void erts_lc_require_lock_flg(erts_lc_lock_t *lck, erts_lock_options_t options,
char *file, unsigned int line)
{
erts_lc_locked_locks_t *l_lcks = make_my_locked_locks();
erts_lc_locked_lock_t *l_lck = l_lcks->locked.first;
if (!find_lock(&l_lck, lck))
required_not_locked(l_lcks, lck);
- l_lck = new_locked_lock(lck, op_flags, file, line);
+ l_lck = new_locked_lock(lck, options, file, line);
if (!l_lcks->required.last) {
ASSERT(!l_lcks->required.first);
l_lck->next = l_lck->prev = NULL;
@@ -1110,7 +1135,7 @@ void erts_lc_require_lock_flg(erts_lc_lock_t *lck, Uint16 op_flags,
}
}
-void erts_lc_unrequire_lock_flg(erts_lc_lock_t *lck, Uint16 op_flags)
+void erts_lc_unrequire_lock_flg(erts_lc_lock_t *lck, erts_lock_options_t options)
{
erts_lc_locked_locks_t *l_lcks = make_my_locked_locks();
erts_lc_locked_lock_t *l_lck = l_lcks->locked.first;
@@ -1138,7 +1163,7 @@ void erts_lc_unrequire_lock_flg(erts_lc_lock_t *lck, Uint16 op_flags)
lc_free((void *) l_lck);
}
-void erts_lc_lock_flg_x(erts_lc_lock_t *lck, Uint16 op_flags,
+void erts_lc_lock_flg_x(erts_lc_lock_t *lck, erts_lock_options_t options,
char *file, unsigned int line)
{
erts_lc_locked_locks_t *l_lcks;
@@ -1151,7 +1176,7 @@ void erts_lc_lock_flg_x(erts_lc_lock_t *lck, Uint16 op_flags,
return;
l_lcks = make_my_locked_locks();
- l_lck = new_locked_lock(lck, op_flags, file, line);
+ l_lck = new_locked_lock(lck, options, file, line);
if (!l_lcks->locked.last) {
ASSERT(!l_lcks->locked.first);
@@ -1167,12 +1192,12 @@ void erts_lc_lock_flg_x(erts_lc_lock_t *lck, Uint16 op_flags,
l_lcks->locked.last = l_lck;
}
else if (l_lcks->locked.last->id == lck->id && l_lcks->locked.last->extra == lck->extra)
- lock_twice("Locking", l_lcks, lck, op_flags);
+ lock_twice("Locking", l_lcks, lck, options);
else
lock_order_violation(l_lcks, lck);
}
-void erts_lc_unlock_flg(erts_lc_lock_t *lck, Uint16 op_flags)
+void erts_lc_unlock_flg(erts_lc_lock_t *lck, erts_lock_options_t options)
{
erts_lc_locked_locks_t *l_lcks;
erts_lc_locked_lock_t *l_lck;
@@ -1193,8 +1218,8 @@ void erts_lc_unlock_flg(erts_lc_lock_t *lck, Uint16 op_flags)
for (l_lck = l_lcks ? l_lcks->locked.last : NULL; l_lck; l_lck = l_lck->prev) {
if (l_lck->id == lck->id && l_lck->extra == lck->extra) {
- if ((l_lck->flags & ERTS_LC_FLG_LO_ALL) != op_flags)
- unlock_op_mismatch(l_lcks, lck, op_flags);
+ if ((l_lck->taken_options & ERTS_LOCK_OPTIONS_RDWR) != options)
+ unlock_op_mismatch(l_lcks, lck, options);
if (l_lck->prev)
l_lck->prev->next = l_lck->next;
else
@@ -1211,7 +1236,7 @@ void erts_lc_unlock_flg(erts_lc_lock_t *lck, Uint16 op_flags)
unlock_of_not_locked(l_lcks, lck);
}
-void erts_lc_might_unlock_flg(erts_lc_lock_t *lck, Uint16 op_flags)
+void erts_lc_might_unlock_flg(erts_lc_lock_t *lck, erts_lock_options_t options)
{
erts_lc_locked_locks_t *l_lcks;
erts_lc_locked_lock_t *l_lck;
@@ -1275,23 +1300,25 @@ void erts_lc_unrequire_lock(erts_lc_lock_t *lck)
}
void
-erts_lc_init_lock(erts_lc_lock_t *lck, char *name, Uint16 flags)
+erts_lc_init_lock(erts_lc_lock_t *lck, char *name, erts_lock_flags_t flags)
{
lck->id = erts_lc_get_lock_order_id(name);
lck->extra = (UWord) &lck->extra;
ASSERT(is_not_immed(lck->extra));
lck->flags = flags;
+ lck->taken_options = 0;
lck->inited = ERTS_LC_INITITALIZED;
}
void
-erts_lc_init_lock_x(erts_lc_lock_t *lck, char *name, Uint16 flags, Eterm extra)
+erts_lc_init_lock_x(erts_lc_lock_t *lck, char *name, erts_lock_flags_t flags, Eterm extra)
{
lck->id = erts_lc_get_lock_order_id(name);
lck->extra = extra;
ASSERT(is_immed(lck->extra));
lck->flags = flags;
+ lck->taken_options = 0;
lck->inited = ERTS_LC_INITITALIZED;
}
@@ -1305,6 +1332,7 @@ erts_lc_destroy_lock(erts_lc_lock_t *lck)
lck->id = -1;
lck->extra = THE_NON_VALUE;
lck->flags = 0;
+ lck->taken_options = 0;
}
void
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-12 21:50:18 +0000