From: Nilay Vaish Date: Thu, 27 Oct 2022 18:33:49 +0000 (-0700) Subject: nptl: Make mmap and munmap in thread stack allocation interposable X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=16ca0733a06f551aca8a5ecd38bcb719c4a56634;p=thirdparty%2Fglibc.git nptl: Make mmap and munmap in thread stack allocation interposable b/238021577: __mmap and __munmap are not interposable. Call interposable mmap and munmap instead so that we can capture thread stack allocations. --- diff --git a/nptl/allocatestack.c b/nptl/allocatestack.c index 9f6a75695ed..1989ca7c868 100644 --- a/nptl/allocatestack.c +++ b/nptl/allocatestack.c @@ -276,7 +276,7 @@ __free_stacks (size_t limit) /* Remove this block. This should never fail. If it does something is really wrong. */ - if (__munmap (curr->stackblock, curr->stackblock_size) != 0) + if (munmap (curr->stackblock, curr->stackblock_size) != 0) abort (); /* Maybe we have freed enough. */ @@ -558,7 +558,7 @@ allocate_stack (const struct pthread_attr *attr, struct pthread **pdp, /* If a guard page is required, avoid committing memory by first allocate with PROT_NONE and then reserve with required permission excluding the guard page. */ - mem = __mmap (NULL, size, (guardsize == 0) ? prot : PROT_NONE, + mem = mmap (NULL, size, (guardsize == 0) ? prot : PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0); if (__glibc_unlikely (mem == MAP_FAILED)) @@ -585,7 +585,7 @@ allocate_stack (const struct pthread_attr *attr, struct pthread **pdp, pagesize_m1); if (setup_stack_prot (mem, size, guard, guardsize, prot) != 0) { - __munmap (mem, size); + munmap (mem, size); return errno; } } @@ -628,7 +628,7 @@ allocate_stack (const struct pthread_attr *attr, struct pthread **pdp, assert (errno == ENOMEM); /* Free the stack memory we just allocated. */ - (void) __munmap (mem, size); + (void) munmap (mem, size); return errno; }