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Make locks more reliable

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This change switches most of the core locks to be re-entrant, in order
to reduce the chance of deadlocking code that does, clever things with
asynchronous signal handlers. This change implements it it in pthreads
so we're one step closer to having a standardized threading primitives
This commit is contained in:
Justine Tunney 2022-06-11 01:59:26 -07:00
parent 5ea618f0af
commit c260345e06
35 changed files with 369 additions and 258 deletions
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4
libc/runtime/mprotect-nt.greg.c
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@ -29,7 +29,7 @@ textwindows int sys_mprotect_nt(void *addr, size_t size, int prot) {
unsigned i;
uint32_t op;
char *a, *b, *x, *y, *p;
_spinlock(&_mmi.lock);
__mmi_lock();
p = addr;
i = FindMemoryInterval(&_mmi, (intptr_t)p >> 16);
if (i == _mmi.i || (!i && p + size <= ADDR(_mmi.p[0].x))) {
@ -58,6 +58,6 @@ textwindows int sys_mprotect_nt(void *addr, size_t size, int prot) {
}
}
}
_spunlock(&_mmi.lock);
__mmi_unlock();
return rc;
}