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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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8
src/jemalloc.c
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@@ -2529,12 +2529,12 @@ imalloc_body(static_opts_t *sopts, dynamic_opts_t *dopts, tsd_t *tsd) {
sample_event);
emap_alloc_ctx_t alloc_ctx;
if (likely((uintptr_t)tctx == (uintptr_t)1U)) {
if (likely(tctx == PROF_TCTX_SENTINEL)) {
alloc_ctx.slab = sz_can_use_slab(usize);
allocation = imalloc_no_sample(
sopts, dopts, tsd, usize, usize, ind,
alloc_ctx.slab);
} else if ((uintptr_t)tctx > (uintptr_t)1U) {
} else if (tctx != NULL) {
allocation = imalloc_sample(
sopts, dopts, tsd, usize, ind);
alloc_ctx.slab = false;
@@ -3366,7 +3366,7 @@ irallocx_prof(tsd_t *tsd, void *old_ptr, size_t old_usize, size_t size,
bool sample_event = te_prof_sample_event_lookahead(tsd, usize);
prof_tctx_t *tctx = prof_alloc_prep(tsd, prof_active, sample_event);
void *p;
if (unlikely((uintptr_t)tctx != (uintptr_t)1U)) {
if (unlikely(tctx != PROF_TCTX_SENTINEL)) {
p = irallocx_prof_sample(tsd_tsdn(tsd), old_ptr, old_usize,
usize, alignment, zero, tcache, arena, tctx, hook_args);
} else {
@@ -3612,7 +3612,7 @@ ixallocx_prof(tsd_t *tsd, void *ptr, size_t old_usize, size_t size,
prof_tctx_t *tctx = prof_alloc_prep(tsd, prof_active, sample_event);
size_t usize;
if (unlikely((uintptr_t)tctx != (uintptr_t)1U)) {
if (unlikely(tctx != PROF_TCTX_SENTINEL)) {
usize = ixallocx_prof_sample(tsd_tsdn(tsd), ptr, old_usize,
size, extra, alignment, zero, tctx);
} else {