Add unit tests for logging

test/unit/prof_log.c

@@ -0,0 +1,146 @@
+#include "test/jemalloc_test.h"
+
+#define N_PARAM 100
+#define N_THREADS 10
+
+static void assert_rep() {
+	assert_b_eq(prof_log_rep_check(), false, "Rep check failed");
+}
+
+static void assert_log_empty() {
+	assert_zu_eq(prof_log_bt_count(), 0,
+	    "The log has backtraces; it isn't empty");
+	assert_zu_eq(prof_log_thr_count(), 0,
+	    "The log has threads; it isn't empty");
+	assert_zu_eq(prof_log_alloc_count(), 0,
+	    "The log has allocations; it isn't empty");
+}
+
+void *buf[N_PARAM];
+
+static void f() {
+	int i;
+	for (i = 0; i < N_PARAM; i++) {
+		buf[i] = malloc(100);
+	}
+	for (i = 0; i < N_PARAM; i++) {
+		free(buf[i]);
+	}
+}
+
+TEST_BEGIN(test_prof_log_many_logs) {
+	int i;
+
+	test_skip_if(!config_prof);
+
+	for (i = 0; i < N_PARAM; i++) {
+		assert_b_eq(prof_log_is_logging(), false,
+		    "Logging shouldn't have started yet");
+		assert_d_eq(mallctl("prof.log_start", NULL, NULL, NULL, 0), 0,
+		    "Unexpected mallctl failure when starting logging");
+		assert_b_eq(prof_log_is_logging(), true,
+		    "Logging should be started by now");
+		assert_log_empty();
+		assert_rep();
+		f();
+		assert_zu_eq(prof_log_thr_count(), 1, "Wrong thread count");
+		assert_rep();
+		assert_b_eq(prof_log_is_logging(), true,
+		    "Logging should still be on");
+		assert_d_eq(mallctl("prof.log_stop", NULL, NULL, NULL, 0), 0,
+		    "Unexpected mallctl failure when stopping logging");
+		assert_b_eq(prof_log_is_logging(), false,
+		    "Logging should have turned off");
+	}
+}
+TEST_END
+
+thd_t thr_buf[N_THREADS];
+
+static void *f_thread(void *unused) {
+	int i;
+	for (i = 0; i < N_PARAM; i++) {
+		void *p = malloc(100);
+		memset(p, 100, sizeof(char));
+		free(p);
+	}
+
+	return NULL;
+}
+
+TEST_BEGIN(test_prof_log_many_threads) {
+
+	test_skip_if(!config_prof);
+
+	int i;
+	assert_d_eq(mallctl("prof.log_start", NULL, NULL, NULL, 0), 0,
+	    "Unexpected mallctl failure when starting logging");
+	for (i = 0; i < N_THREADS; i++) {
+		thd_create(&thr_buf[i], &f_thread, NULL);
+	}
+
+	for (i = 0; i < N_THREADS; i++) {
+		thd_join(thr_buf[i], NULL);
+	}
+	assert_zu_eq(prof_log_thr_count(), N_THREADS,
+	    "Wrong number of thread entries");
+	assert_rep();
+	assert_d_eq(mallctl("prof.log_stop", NULL, NULL, NULL, 0), 0,
+	    "Unexpected mallctl failure when stopping logging");
+}
+TEST_END
+
+static void f3() {
+	void *p = malloc(100);
+	free(p);
+}
+
+static void f1() {
+	void *p = malloc(100);
+	f3();
+	free(p);
+}
+
+static void f2() {
+	void *p = malloc(100);
+	free(p);
+}
+
+TEST_BEGIN(test_prof_log_many_traces) {
+
+	test_skip_if(!config_prof);
+
+	assert_d_eq(mallctl("prof.log_start", NULL, NULL, NULL, 0), 0,
+	    "Unexpected mallctl failure when starting logging");
+	int i;
+	assert_rep();
+	assert_log_empty();
+	for (i = 0; i < N_PARAM; i++) {
+		assert_rep();
+		f1();
+		assert_rep();
+		f2();
+		assert_rep();
+		f3();
+		assert_rep();
+	}
+	/*
+	 * There should be 8 total backtraces: two for malloc/free in f1(),
+	 * two for malloc/free in f2(), two for malloc/free in f3(), and then
+	 * two for malloc/free in f1()'s call to f3().
+	 */
+	assert_zu_eq(prof_log_bt_count(), 8,
+	    "Wrong number of backtraces given sample workload");
+	assert_d_eq(mallctl("prof.log_stop", NULL, NULL, NULL, 0), 0,
+	    "Unexpected mallctl failure when stopping logging");
+}
+TEST_END
+
+int
+main(void) {
+	prof_log_dummy_set(true);
+	return test_no_reentrancy(
+	    test_prof_log_many_logs,
+	    test_prof_log_many_traces,
+	    test_prof_log_many_threads);
+}

test/unit/prof_log.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+if [ "x${enable_prof}" = "x1" ] ; then
+  export MALLOC_CONF="prof:true,lg_prof_sample:0"
+fi