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Allow setting custom backtrace hook

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Existing backtrace implementations skip native stack frames from runtimes like
Python. The hook allows to augment the backtraces to attribute allocations to
native functions in heap profiles.
This commit is contained in:
Alex Lapenkou 2021-08-30 14:05:56 -07:00 • committed by Alexander Lapenkov
parent 523cfa55c5
commit f7d46b8119
11 changed files with 172 additions and 30 deletions
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16
src/prof.c
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@ -10,6 +10,7 @@
#include "jemalloc/internal/prof_recent.h"
#include "jemalloc/internal/prof_stats.h"
#include "jemalloc/internal/prof_sys.h"
#include "jemalloc/internal/prof_hook.h"
#include "jemalloc/internal/thread_event.h"
/*
@ -69,6 +70,9 @@ static malloc_mutex_t next_thr_uid_mtx;
/* Do not dump any profiles until bootstrapping is complete. */
bool prof_booted = false;
/* Logically a prof_backtrace_hook_t. */
atomic_p_t prof_backtrace_hook;
/******************************************************************************/
void
@ -518,6 +522,17 @@ prof_gdump_set(tsdn_t *tsdn, bool gdump) {
return prof_gdump_old;
}
void
prof_backtrace_hook_set(prof_backtrace_hook_t hook) {
atomic_store_p(&prof_backtrace_hook, hook, ATOMIC_RELEASE);
}
prof_backtrace_hook_t
prof_backtrace_hook_get() {
return (prof_backtrace_hook_t)atomic_load_p(&prof_backtrace_hook,
ATOMIC_ACQUIRE);
}
void
prof_boot0(void) {
cassert(config_prof);
@ -657,6 +672,7 @@ prof_boot2(tsd_t *tsd, base_t *base) {
}
}
prof_hooks_init();
prof_unwind_init();
}
prof_booted = true;