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Add torture test for zipos file descriptors

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This change hardens the code for opening /zip/ files using the system
call interface. Thread safety and signal safety has been improved for
file descriptors in general. We now document fixed addresses that are
needed for low level allocations.
This commit is contained in:
Justine Tunney 2022-06-15 16:19:50 -07:00
parent 579080cd4c
commit e466dd0553
44 changed files with 2981 additions and 307 deletions
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34
libc/intrin/asan.c
View file

@ -1210,38 +1210,26 @@ void __asan_unregister_globals(struct AsanGlobal g[], int n) {
}
}
void __asan_evil(uint8_t *addr, int size, const char *s1, const char *s2) {
void __asan_evil(uint8_t *addr, int size, const char *s) {
struct AsanTrace tr;
__asan_rawtrace(&tr, __builtin_frame_address(0));
kprintf(
"WARNING: ASAN %s %s bad %d byte %s at %x bt %x %x %x\n",
__asan_noreentry == gettid() ? "error during" : "multi-threaded crash",
s1, size, s2, addr, tr.p[0], tr.p[1], tr.p[2], tr.p[3]);
kprintf("WARNING: ASAN bad %d byte %s at %x bt %x %x %x\n", size, s, addr,
tr.p[0], tr.p[1], tr.p[2], tr.p[3]);
}
void __asan_report_load(uint8_t *addr, int size) {
if (_lockcmpxchg(&__asan_noreentry, 0, gettid())) {
if (!__vforked) {
__asan_report_memory_fault(addr, size, "load")();
__asan_unreachable();
} else {
__asan_evil(addr, size, "vfork()", "load");
}
} else {
__asan_evil(addr, size, "ASAN Reporting", "load");
__asan_evil(addr, size, "load");
if (!__vforked && _lockcmpxchg(&__asan_noreentry, 0, 1)) {
__asan_report_memory_fault(addr, size, "load")();
__asan_unreachable();
}
}
void __asan_report_store(uint8_t *addr, int size) {
if (_lockcmpxchg(&__asan_noreentry, 0, gettid())) {
if (!__vforked) {
__asan_report_memory_fault(addr, size, "store")();
__asan_unreachable();
} else {
__asan_evil(addr, size, "vfork()", "store");
}
} else {
__asan_evil(addr, size, "ASAN reporting", "store");
__asan_evil(addr, size, "store");
if (!__vforked && _lockcmpxchg(&__asan_noreentry, 0, 1)) {
__asan_report_memory_fault(addr, size, "store")();
__asan_unreachable();
}
}