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