mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-07-07 19:58:30 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Delete ASAN

Browse source 
It hasn't been helpful enough to be justify the maintenance burden. What
actually does help is mprotect(), kprintf(), --ftrace and --strace which
can always be counted upon to work correctly. We aren't losing much with
this change. Support for ASAN on AARCH64 was never implemented. Applying
ASAN to the core libc runtimes was disabled many months ago. If there is
some way to have an ASAN runtime for user programs that is less invasive
we can potentially consider reintroducing support. But now is premature.
This commit is contained in:
Justine Tunney 2024-06-22 05:45:49 -07:00
parent 6ffed14b9c
commit d1d4388201
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
198 changed files with 130 additions and 2954 deletions
Download patch file Download diff file Expand all files Collapse all files

12
libc/intrin/mmap.c
View file

@ -24,7 +24,6 @@
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/asan.internal.h"
#include "libc/intrin/atomic.h"
#include "libc/intrin/describeflags.internal.h"
#include "libc/intrin/directmap.internal.h"
@ -114,10 +113,7 @@ static bool __overlaps_existing_map(const char *addr, size_t size) {
}
static int __munmap_chunk(void *addr, size_t size) {
int rc = sys_munmap(addr, size);
if (IsAsan() && !rc)
__asan_unshadow(addr, size);
return rc;
return sys_munmap(addr, size);
}
static int __munmap(char *addr, size_t size, bool untrack_only) {
@ -410,12 +406,6 @@ void *__mmap(char *addr, size_t size, int prot, int flags, int fd,
void *mmap(void *addr, size_t size, int prot, int flags, int fd, int64_t off) {
void *res;
res = __mmap(addr, size, prot, flags, fd, off);
if (IsAsan() && res != MAP_FAILED) {
__asan_shadow(res, size);
int granularity = __granularity();
if (size != PGUP(size))
__asan_poison(res + size, PGUP(size) - size, kAsanMmapSizeOverrun);
}
STRACE("mmap(%p, %'zu, %s, %s, %d, %'ld) → %p% m", addr, size,
DescribeProtFlags(prot), DescribeMapFlags(flags), fd, off, res);
return res;