0cf38dc8c8
Add a new function backtrace_str() that returns a condensed backtrace string containing function names and line numbers separated by " <-". For example: "func_a:123 <-func_b:456 <-func_c:789" This is useful for logging and debugging where a compact representation of the call stack is needed. The depth is controlled by the new CONFIG_BACKTRACE_DEPTH option (default 3). Co-developed-by: Claude <noreply@anthropic.com> Signed-off-by: Simon Glass <simon.glass@canonical.com>
85 lines
2.0 KiB
C
85 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Test for backtrace functions
|
|
*
|
|
* Copyright 2025 Canonical Ltd
|
|
* Written by Simon Glass <simon.glass@canonical.com>
|
|
*/
|
|
|
|
#include <backtrace.h>
|
|
#include <string.h>
|
|
#include <test/lib.h>
|
|
#include <test/test.h>
|
|
#include <test/ut.h>
|
|
|
|
/* Test backtrace_init() and backtrace_get_syms() */
|
|
static int lib_test_backtrace(struct unit_test_state *uts)
|
|
{
|
|
static struct backtrace_ctx ctx;
|
|
bool found_self = false;
|
|
bool found_ut_run_list = false;
|
|
uint i;
|
|
|
|
ut_assert(backtrace_init(&ctx, 0) > 2);
|
|
ut_assertok(backtrace_get_syms(&ctx, NULL, 0));
|
|
|
|
/*
|
|
* Check for known functions in the call stack. With libbacktrace
|
|
* we can find static functions too, so check for this test function.
|
|
*/
|
|
for (i = 0; i < ctx.count; i++) {
|
|
const struct backtrace_frame *frame = &ctx.frame[i];
|
|
|
|
if (frame->sym) {
|
|
if (strstr(frame->sym, "lib_test_backtrace"))
|
|
found_self = true;
|
|
if (strstr(frame->sym, "ut_run_list"))
|
|
found_ut_run_list = true;
|
|
}
|
|
}
|
|
|
|
ut_assert(found_self);
|
|
ut_assert(found_ut_run_list);
|
|
|
|
backtrace_uninit(&ctx);
|
|
|
|
return 0;
|
|
}
|
|
LIB_TEST(lib_test_backtrace, 0);
|
|
|
|
/* Test backtrace_strf() and backtrace_str() */
|
|
static int lib_test_backtrace_str(struct unit_test_state *uts)
|
|
{
|
|
char pattern[128];
|
|
char buf[256];
|
|
const char *cstr;
|
|
char *str;
|
|
int line;
|
|
|
|
/* Test backtrace_strf() with skip=1 to skip backtrace_strf() itself */
|
|
line = __LINE__ + 1;
|
|
str = backtrace_strf(1, buf, sizeof(buf));
|
|
ut_assertnonnull(str);
|
|
ut_asserteq_ptr(buf, str);
|
|
|
|
printf("backtrace_strf: %s\n", str);
|
|
snprintf(pattern, sizeof(pattern),
|
|
"lib_test_backtrace_str:%d <-ut_run_test:\\d+ <-ut_run_test_live_flat:\\d+",
|
|
line);
|
|
ut_asserteq_regex(pattern, str);
|
|
|
|
/* Test backtrace_str() */
|
|
line = __LINE__ + 1;
|
|
cstr = backtrace_str(0);
|
|
ut_assertnonnull(cstr);
|
|
|
|
printf("backtrace_str: %s\n", cstr);
|
|
snprintf(pattern, sizeof(pattern),
|
|
"lib_test_backtrace_str:%d <-ut_run_test:\\d+ <-ut_run_test_live_flat:\\d+",
|
|
line);
|
|
ut_asserteq_regex(pattern, cstr);
|
|
|
|
return 0;
|
|
}
|
|
LIB_TEST(lib_test_backtrace_str, 0);
|