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- Add Lua backtraces to redbean!
- Wipe serving keys after redbean forks
- Audit redbean to remove free via exit
- Log SSL client ciphersuite preferences
- Increase ASAN malloc() backtrace depth
- Make GetSslRoots() behave as a singleton
- Move leaks.c from LIBC_TESTLIB to LIBC_LOG
- Add undocumented %n to printf() for newlines
- Fix redbean memory leak reindexing inode change
- Fix redbean memory leak with Fetch() DNS object
- Restore original environ after __cxa_finalize()
- Make backtrace always work after __cxa_finalize()
- Introduce COUNTEXPR() diagnostic / benchmark tool
- Fix a few more instances of errno being clobbered
- Consolidate the ANSI color disabling internal APIs
This commit is contained in:
Justine Tunney 2022-03-18 02:33:37 -07:00
parent f5831a62fa
commit af645fcbec
61 changed files with 1354 additions and 814 deletions
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26
libc/intrin/asan.c
View file

@ -52,6 +52,10 @@
STATIC_YOINK("_init_asan");
#define ASAN_MORGUE_ITEMS 512
#define ASAN_MORGUE_THRESHOLD 65536 // morgue memory O(ITEMS*THRESHOLD)
#define ASAN_TRACE_ITEMS 16 // backtrace limit on malloc origin
/**
* @fileoverview Cosmopolitan Address Sanitizer Runtime.
*
@ -83,8 +87,6 @@ STATIC_YOINK("_init_asan");
* movq (%addr),%dst
*/
#define ASAN_MORGUE_SIZE 128
#define HOOK(HOOK, IMPL) \
do { \
if (weaken(HOOK)) { \
@ -104,7 +106,7 @@ STATIC_YOINK("_init_asan");
typedef char xmm_t __attribute__((__vector_size__(16), __aligned__(1)));
struct AsanTrace {
intptr_t p[4];
uint32_t p[ASAN_TRACE_ITEMS]; // assumes linkage into 32-bit space
};
struct AsanExtra {
@ -139,7 +141,12 @@ struct AsanGlobal {
struct AsanMorgue {
unsigned i;
void *p[ASAN_MORGUE_SIZE];
void *p[ASAN_MORGUE_ITEMS];
};
struct ReportOriginHeap {
const unsigned char *a;
int z;
};
bool __asan_noreentry;
@ -657,11 +664,6 @@ static void __asan_report_memory_origin_image(intptr_t a, int z) {
}
}
struct ReportOriginHeap {
const unsigned char *a;
int z;
};
static noasan void OnMemory(void *x, void *y, size_t n, void *a) {
const unsigned char *p = x;
struct ReportOriginHeap *t = a;
@ -725,6 +727,7 @@ nodiscard static __asan_die_f *__asan_report(const void *addr, int size,
uint64_t x, y, z;
char *p, *q, *base;
struct MemoryIntervals *m;
++g_ftrace;
p = __fatalbuf;
kprintf("%n\e[J\e[1;31masan error\e[0m: %s %d-byte %s at %p shadow %p%n%s%n",
__asan_describe_access_poison(kind), size, message, addr,
@ -805,6 +808,7 @@ nodiscard static __asan_die_f *__asan_report(const void *addr, int size,
kprintf("%s", __fatalbuf);
__asan_report_memory_origin(addr, size, kind);
kprintf("%nthe crash was caused by%n");
--g_ftrace;
return __asan_die();
}
@ -1005,7 +1009,7 @@ int __asan_print_trace(void *p) {
kprintf(" bad cookie");
return -1;
}
kprintf("%n%p %,lu bytes [asan]", (char *)p + 16, n);
kprintf("%n%p %,lu bytes [asan]", (char *)p, n);
if (!__asan_is_mapped((((intptr_t)p >> 3) + 0x7fff8000) >> 16)) {
kprintf(" (shadow not mapped?!)");
}
@ -1024,7 +1028,7 @@ static void __asan_deallocate(char *p, long kind) {
if ((e = __asan_get_extra(p, &c))) {
if (__asan_read48(e->size, &n)) {
__asan_poison((uintptr_t)p, c, kind);
if (c <= FRAMESIZE) {
if (c <= ASAN_MORGUE_THRESHOLD) {
p = __asan_morgue_add(p);
}
weaken(dlfree)(p);