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/*
* Copyright © 2020 Google, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <stdio.h>
#include <gtest/gtest.h>
#include "util/u_debug_stack.h"
static void __attribute__((noinline))
func_a(void)
{
struct debug_stack_frame backtrace[16];
fprintf(stderr, "--- backtrace from func_a:\n");
debug_backtrace_capture(backtrace, 0, 16);
debug_backtrace_dump(backtrace, 16);
}
static void __attribute__((noinline))
func_b(void)
{
struct debug_stack_frame backtrace[16];
func_a();
fprintf(stderr, "--- backtrace from func_b:\n");
debug_backtrace_capture(backtrace, 0, 16);
debug_backtrace_dump(backtrace, 16);
}
static void __attribute__((noinline))
func_c(struct debug_stack_frame *frames)
{
debug_backtrace_capture(frames, 0, 16);
}
TEST(u_debug_stack_test, basics)
{
struct debug_stack_frame backtrace[16];
struct debug_stack_frame stored_backtrace[16];
func_c(stored_backtrace);
fprintf(stderr, "--- backtrace from main to stderr:\n");
debug_backtrace_capture(backtrace, 0, 16);
debug_backtrace_print(stderr, backtrace, 16);
fprintf(stderr, "--- backtrace from main again to debug_printf:\n");
debug_backtrace_capture(backtrace, 0, 16);
debug_backtrace_dump(backtrace, 16);
func_a();
func_b();
fprintf(stderr, "--- stored backtrace from start of main:\n");
debug_backtrace_dump(stored_backtrace, 16);
}
#if _POSIX_C_SOURCE >= 200809L
TEST(u_debug_stack_test, capture_not_overwritten)
{
struct debug_stack_frame backtrace1[16], backtrace2[16];
FILE *fp;
char *bt1, *bt2;
size_t size;
/* Old android implementation uses one global capture per thread. Test that
* we can store multiple captures and that they decode to different
* backtraces.
*/
func_c(backtrace1);
debug_backtrace_capture(backtrace2, 0, 16);
fp = open_memstream(&bt1, &size);
debug_backtrace_print(fp, backtrace1, 16);
fclose(fp);
fp = open_memstream(&bt2, &size);
debug_backtrace_print(fp, backtrace2, 16);
fclose(fp);
if (size > 0) {
EXPECT_STRNE(bt1, bt2);
}
}
#endif
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