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Define PROF_TCTX_SENTINEL instead of using magic numbers

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This makes the code more readable on its own, and also sets the stage
for more cleanly handling the pointer provenance lints in a following
commit.
This commit is contained in:
Kevin Svetlitski
2023-07-21 18:13:58 -07:00
committed by Qi Wang
parent c49c17f128
commit 7e54dd1ddb
7 changed files with 39 additions and 24 deletions
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14
src/prof.c
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@@ -91,11 +91,19 @@ prof_alloc_rollback(tsd_t *tsd, prof_tctx_t *tctx) {
cassert(config_prof);
if (tsd_reentrancy_level_get(tsd) > 0) {
assert((uintptr_t)tctx == (uintptr_t)1U);
assert(tctx == PROF_TCTX_SENTINEL);
return;
}
if ((uintptr_t)tctx > (uintptr_t)1U) {
if (prof_tctx_is_valid(tctx)) {
/*
* This `assert` really shouldn't be necessary. It's here
* because there's a bug in the clang static analyzer; it
* somehow does not realize that by `prof_tctx_is_valid(tctx)`
* being true that we've already ensured that `tctx` is not
* `NULL`.
*/
assert(tctx != NULL);
malloc_mutex_lock(tsd_tsdn(tsd), tctx->tdata->lock);
tctx->prepared = false;
prof_tctx_try_destroy(tsd, tctx);
@@ -169,7 +177,7 @@ prof_free_sampled_object(tsd_t *tsd, const void *ptr, size_t usize,
assert(prof_info != NULL);
prof_tctx_t *tctx = prof_info->alloc_tctx;
assert((uintptr_t)tctx > (uintptr_t)1U);
assert(prof_tctx_is_valid(tctx));
szind_t szind = sz_size2index(usize);