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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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14
test/analyze/prof_bias.c
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@@ -24,12 +24,12 @@
*/
static void
mock_backtrace(prof_bt_t *bt) {
bt->len = 4;
bt->vec[0] = (void *)0x111;
bt->vec[1] = (void *)0x222;
bt->vec[2] = (void *)0x333;
bt->vec[3] = (void *)0x444;
mock_backtrace(void **vec, unsigned *len, unsigned max_len) {
*len = 4;
vec[0] = (void *)0x111;
vec[1] = (void *)0x222;
vec[2] = (void *)0x333;
vec[3] = (void *)0x444;
}
static void
@@ -50,7 +50,7 @@ main(void) {
sizeof(lg_prof_sample));
assert(err == 0);
prof_backtrace_hook = &mock_backtrace;
prof_backtrace_hook_set(mock_backtrace);
do_allocs(16, 32 * 1024 * 1024, /* do_frees */ true);
do_allocs(32 * 1024* 1024, 16, /* do_frees */ true);
do_allocs(16, 32 * 1024 * 1024, /* do_frees */ false);