src/witness.c

#define JEMALLOC_WITNESS_C_
#include "jemalloc/internal/jemalloc_preamble.h"
#include "jemalloc/internal/jemalloc_internal_includes.h"

#include "jemalloc/internal/assert.h"
#include "jemalloc/internal/malloc_io.h"

void
witness_init(witness_t *witness, const char *name, witness_rank_t rank,
    witness_comp_t *comp, void *opaque) {
	witness->name = name;
	witness->rank = rank;
	witness->comp = comp;
	witness->opaque = opaque;
}

static void
witness_lock_error_impl(const witness_list_t *witnesses,
    const witness_t *witness) {
	witness_t *w;

	malloc_printf("<jemalloc>: Lock rank order reversal:");
	ql_foreach(w, witnesses, link) {
		malloc_printf(" %s(%u)", w->name, w->rank);
	}
	malloc_printf(" %s(%u)\n", witness->name, witness->rank);
	abort();
}
witness_lock_error_t *JET_MUTABLE witness_lock_error = witness_lock_error_impl;

static void
witness_owner_error_impl(const witness_t *witness) {
	malloc_printf("<jemalloc>: Should own %s(%u)\n", witness->name,
	    witness->rank);
	abort();
}
witness_owner_error_t *JET_MUTABLE witness_owner_error =
    witness_owner_error_impl;

static void
witness_not_owner_error_impl(const witness_t *witness) {
	malloc_printf("<jemalloc>: Should not own %s(%u)\n", witness->name,
	    witness->rank);
	abort();
}
witness_not_owner_error_t *JET_MUTABLE witness_not_owner_error =
    witness_not_owner_error_impl;

static void
witness_depth_error_impl(const witness_list_t *witnesses,
    witness_rank_t rank_inclusive, unsigned depth) {
	witness_t *w;

	malloc_printf("<jemalloc>: Should own %u lock%s of rank >= %u:", depth,
	    (depth != 1) ?  "s" : "", rank_inclusive);
	ql_foreach(w, witnesses, link) {
		malloc_printf(" %s(%u)", w->name, w->rank);
	}
	malloc_printf("\n");
	abort();
}
witness_depth_error_t *JET_MUTABLE witness_depth_error =
    witness_depth_error_impl;

void
witnesses_cleanup(tsd_t *tsd) {
	witness_assert_lockless(tsd_tsdn(tsd));

	/* Do nothing. */
}

void
witness_prefork(tsd_t *tsd) {
	if (!config_debug) {
		return;
	}
	tsd_witness_fork_set(tsd, true);
}

void
witness_postfork_parent(tsd_t *tsd) {
	if (!config_debug) {
		return;
	}
	tsd_witness_fork_set(tsd, false);
}

void
witness_postfork_child(tsd_t *tsd) {
	if (!config_debug) {
		return;
	}
#ifndef JEMALLOC_MUTEX_INIT_CB
	witness_list_t *witnesses;

	witnesses = tsd_witnessesp_get(tsd);
	ql_new(witnesses);
#endif
	tsd_witness_fork_set(tsd, false);
}