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Use better memory strategy on Windows

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Rather than using the the rollo global to pick addresses, we select them
randomly now using a conservative vaspace.
This commit is contained in:
Justine Tunney 2024-07-20 02:20:03 -07:00
parent 6a5d4ed65b
commit 2018cac11f
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GPG key ID: BE714B4575D6E328
13 changed files with 113 additions and 124 deletions
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4
libc/proc/fork.c
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@ -48,6 +48,7 @@
__static_yoink("_pthread_atfork");
extern pthread_mutex_t _rand64_lock_obj;
extern pthread_mutex_t _pthread_lock_obj;
static void _onfork_prepare(void) {
@ -56,10 +57,12 @@ static void _onfork_prepare(void) {
_pthread_lock();
__maps_lock();
__fds_lock();
pthread_mutex_lock(&_rand64_lock_obj);
LOCKTRACE("READY TO ROCK AND ROLL");
}
static void _onfork_parent(void) {
pthread_mutex_unlock(&_rand64_lock_obj);
__fds_unlock();
__maps_unlock();
_pthread_unlock();
@ -69,6 +72,7 @@ static void _onfork_parent(void) {
static void _onfork_child(void) {
__fds_lock_obj = (pthread_mutex_t)PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
_rand64_lock_obj = (pthread_mutex_t)PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
_pthread_lock_obj = (pthread_mutex_t)PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
atomic_store_explicit(&__maps.lock, 0, memory_order_relaxed);
atomic_store_explicit(&__get_tls()->tib_relock_maps, 0, memory_order_relaxed);