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Make fixes and improvements

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- Document more compiler flags
- Expose new __print_maps() api
- Better overflow checking in mmap()
- Improve the shell example somewhat
- Fix minor runtime bugs regarding stacks
- Make kill() on fork()+execve()'d children work
- Support CLONE_CHILD_CLEARTID for proper joining
- Fix recent possible deadlock regression with --ftrace
This commit is contained in:
Justine Tunney 2022-05-19 16:57:49 -07:00
parent 6e52cba37a
commit ec2cb88058
68 changed files with 1211 additions and 431 deletions
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10
libc/runtime/memtrack.greg.c
View file

@ -39,7 +39,7 @@
static void *MoveMemoryIntervals(struct MemoryInterval *d,
const struct MemoryInterval *s, int n) {
/* asan runtime depends on this function */
// asan runtime depends on this function
int i;
assert(n >= 0);
if (d > s) {
@ -55,7 +55,7 @@ static void *MoveMemoryIntervals(struct MemoryInterval *d,
}
static void RemoveMemoryIntervals(struct MemoryIntervals *mm, int i, int n) {
/* asan runtime depends on this function */
// asan runtime depends on this function
assert(i >= 0);
assert(i + n <= mm->i);
MoveMemoryIntervals(mm->p + i, mm->p + i + n, mm->i - (i + n));
@ -71,7 +71,7 @@ static bool ExtendMemoryIntervals(struct MemoryIntervals *mm) {
base = (char *)kMemtrackStart;
prot = PROT_READ | PROT_WRITE;
flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED;
/* TODO(jart): These map handles should not leak across NT fork() */
// TODO(jart): These map handles should not leak across NT fork()
if (mm->p == mm->s) {
if (IsAsan()) {
shad = (char *)(((intptr_t)base >> 3) + 0x7fff8000);
@ -100,7 +100,7 @@ static bool ExtendMemoryIntervals(struct MemoryIntervals *mm) {
}
int CreateMemoryInterval(struct MemoryIntervals *mm, int i) {
/* asan runtime depends on this function */
// asan runtime depends on this function
int rc;
rc = 0;
assert(i >= 0);
@ -192,7 +192,7 @@ int ReleaseMemoryIntervals(struct MemoryIntervals *mm, int x, int y,
int TrackMemoryInterval(struct MemoryIntervals *mm, int x, int y, long h,
int prot, int flags, bool readonlyfile, bool iscow,
long offset, long size) {
/* asan runtime depends on this function */
// asan runtime depends on this function
unsigned i;
assert(y >= x);
assert(AreMemoryIntervalsOk(mm));