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//
// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
// Copyright 2018 Capitar IT Group BV <info@capitar.com>
//
// This software is supplied under the terms of the MIT License, a
// copy of which should be located in the distribution where this
// file was obtained (LICENSE.txt). A copy of the license may also be
// found online at https://opensource.org/licenses/MIT.
//
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef NNG_HAVE_BACKTRACE
#include <execinfo.h>
#endif
#include "core/nng_impl.h"
// Panic handling.
void
nni_show_backtrace(void)
{
#if NNG_HAVE_BACKTRACE
void *frames[50];
int nframes;
nframes = backtrace(frames, sizeof(frames) / sizeof(frames[0]));
if (nframes > 1) {
char **lines = backtrace_symbols(frames, nframes);
if (lines == NULL) {
return;
}
for (int i = 1; i < nframes; i++) {
nni_println(lines[i]);
}
}
#endif
}
// nni_panic shows a panic message, a possible stack bracktrace, then aborts
// the process/program. This should only be called when a condition arises
// that should not be possible, e.g. a programming assertion failure. It should
// not be called in situations such as ENOMEM, as nni_panic is fairly rude
// to any application it may be called from within.
void
nni_panic(const char *fmt, ...)
{
char buf[100];
char fbuf[93]; // 7 bytes of "panic: "
va_list va;
va_start(va, fmt);
(void) vsnprintf(fbuf, sizeof(fbuf), fmt, va);
va_end(va);
(void) snprintf(buf, sizeof(buf), "panic: %s", fbuf);
nni_println(buf);
nni_println("This message is indicative of a BUG.");
nni_println("Report this at https://github.com/nanomsg/nng/issues");
nni_show_backtrace();
nni_plat_abort();
}
void
nni_println(const char *msg)
{
// TODO: support redirection of this later.
nni_plat_println(msg);
}
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