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Force initialization of the init_lock in malloc_init_hard on Windows XP

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This resolves #269.
This commit is contained in:
Mike Hommey 2015-09-03 15:48:48 +09:00 committed by Jason Evans
parent b4330b02a8
commit 0a116faf95
1 changed files with 15 additions and 1 deletions
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16
src/jemalloc.c
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@ -179,13 +179,24 @@ static bool malloc_initializer = NO_INITIALIZER;
static malloc_mutex_t init_lock = SRWLOCK_INIT; static malloc_mutex_t init_lock = SRWLOCK_INIT;
#else #else
static malloc_mutex_t init_lock; static malloc_mutex_t init_lock;
static bool init_lock_initialized = false;
JEMALLOC_ATTR(constructor) JEMALLOC_ATTR(constructor)
static void WINAPI static void WINAPI
_init_init_lock(void) _init_init_lock(void)
{ {
malloc_mutex_init(&init_lock); /* If another constructor in the same binary is using mallctl to
* e.g. setup chunk hooks, it may end up running before this one,
* and malloc_init_hard will crash trying to lock the uninitialized
* lock. So we force an initialization of the lock in
* malloc_init_hard as well. We don't try to care about atomicity
* of the accessed to the init_lock_initialized boolean, since it
* really only matters early in the process creation, before any
* separate thread normally starts doing anything. */
if (!init_lock_initialized)
malloc_mutex_init(&init_lock);
init_lock_initialized = true;
} }
#ifdef _MSC_VER #ifdef _MSC_VER
@ -1300,6 +1311,9 @@ static bool
malloc_init_hard(void) malloc_init_hard(void)
{ {
#if defined(_WIN32) && _WIN32_WINNT < 0x0600
_init_init_lock();
#endif
malloc_mutex_lock(&init_lock); malloc_mutex_lock(&init_lock);
if (!malloc_init_hard_needed()) { if (!malloc_init_hard_needed()) {
malloc_mutex_unlock(&init_lock); malloc_mutex_unlock(&init_lock);