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tests: bluetooth: tester: Print backtrace on crash in native-sim build #97135

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tests: bluetooth: tester: Print backtrace on crash in native-sim build #97135

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44 changes: 44 additions & 0 deletions tests/bluetooth/tester/src/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2,10 +2,20 @@

/*
* Copyright (c) 2015-2016 Intel Corporation
* Copyright (c) 2025 Codecoup
*
* SPDX-License-Identifier: Apache-2.0
*/

#if defined(CONFIG_BOARD_NATIVE_SIM)
#undef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 200809L
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <execinfo.h>
#endif

#include <zephyr/autoconf.h>
#include <zephyr/logging/log.h>

Expand All @@ -14,8 +24,42 @@ LOG_MODULE_REGISTER(LOG_MODULE_NAME, CONFIG_BTTESTER_LOG_LEVEL);

#include "btp/btp.h"

#if defined(CONFIG_BOARD_NATIVE_SIM)
#define BACKTRACE_BUF_SIZE 100

static void sigaction_segfault(int signal, siginfo_t *si, void *arg)
{
void *buffer[BACKTRACE_BUF_SIZE];
int nptrs;

LOG_ERR("SEGMENTATION FAULT (address %p)", si->si_addr);
nptrs = backtrace(buffer, BACKTRACE_BUF_SIZE);
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Consider adding a check if nptrs == BACKTRACE_BUF_SIZE which may indicate that the output was truncated, and we could add a log entry or something to let us know that BACKTRACE_BUF_SIZE may need to be increased

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yeah, I'll add this, however BACKTRACE_BUF_SIZE is 100 :)

LOG_ERR("Backtrace%s:", nptrs == BACKTRACE_BUF_SIZE ? " (possibly truncated)" : "");
backtrace_symbols_fd(buffer, nptrs, STDERR_FILENO);

exit(EXIT_FAILURE);
}

static void sigaction_register(void)
{
struct sigaction sa = {};

sa.sa_sigaction = sigaction_segfault;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_SIGINFO;

if (sigaction(SIGSEGV, &sa, NULL) < 0) {
LOG_WRN("Failed to register sigaction (errno %d)", errno);
}
}
#endif

int main(void)
{
#if defined(CONFIG_BOARD_NATIVE_SIM)
sigaction_register();
#endif

tester_init();
return 0;
}