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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or https://opensource.org/licenses/CDDL-1.0.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright (c) 2024, Rob Norris <robn@despairlabs.com>
*/
#include <assert.h>
#include <pthread.h>
#if defined(__linux__)
#include <errno.h>
#include <sys/prctl.h>
#ifdef HAVE_GETTID
#define libspl_gettid() gettid()
#else
#include <sys/syscall.h>
#define libspl_gettid() ((pid_t)syscall(__NR_gettid))
#endif
#define libspl_getprogname() (program_invocation_short_name)
#define libspl_getthreadname(buf, len) \
prctl(PR_GET_NAME, (unsigned long)(buf), 0, 0, 0)
#elif defined(__FreeBSD__) || defined(__APPLE__)
#if !defined(__APPLE__)
#include <pthread_np.h>
#define libspl_gettid() pthread_getthreadid_np()
#endif
#define libspl_getprogname() getprogname()
#define libspl_getthreadname(buf, len) \
pthread_getname_np(pthread_self(), buf, len);
#endif
#if defined(HAVE_LIBUNWIND)
#define UNW_LOCAL_ONLY
#include <libunwind.h>
static inline void
libspl_dump_backtrace(void)
{
unw_context_t uc;
unw_cursor_t cp;
unw_word_t ip, off;
char funcname[128];
#ifdef HAVE_LIBUNWIND_ELF
char objname[128];
unw_word_t objoff;
#endif
fprintf(stderr, "Call trace:\n");
unw_getcontext(&uc);
unw_init_local(&cp, &uc);
while (unw_step(&cp) > 0) {
unw_get_reg(&cp, UNW_REG_IP, &ip);
unw_get_proc_name(&cp, funcname, sizeof (funcname), &off);
#ifdef HAVE_LIBUNWIND_ELF
unw_get_elf_filename(&cp, objname, sizeof (objname), &objoff);
fprintf(stderr, " [0x%08lx] %s+0x%2lx (in %s +0x%2lx)\n",
ip, funcname, off, objname, objoff);
#else
fprintf(stderr, " [0x%08lx] %s+0x%2lx\n", ip, funcname, off);
#endif
}
}
#elif defined(HAVE_BACKTRACE)
#include <execinfo.h>
static inline void
libspl_dump_backtrace(void)
{
void *btptrs[100];
size_t nptrs = backtrace(btptrs, 100);
char **bt = backtrace_symbols(btptrs, nptrs);
fprintf(stderr, "Call trace:\n");
for (size_t i = 0; i < nptrs; i++)
fprintf(stderr, " %s\n", bt[i]);
free(bt);
}
#else
#define libspl_dump_backtrace()
#endif
#if defined(__APPLE__)
static inline uint64_t
libspl_gettid(void)
{
uint64_t tid;
if (pthread_threadid_np(NULL, &tid) != 0)
tid = 0;
return (tid);
}
#endif
static boolean_t libspl_assert_ok = B_FALSE;
void
libspl_set_assert_ok(boolean_t val)
{
libspl_assert_ok = val;
}
static pthread_mutex_t assert_lock = PTHREAD_MUTEX_INITIALIZER;
/* printf version of libspl_assert */
void
libspl_assertf(const char *file, const char *func, int line,
const char *format, ...)
{
pthread_mutex_lock(&assert_lock);
va_list args;
char tname[64];
libspl_getthreadname(tname, sizeof (tname));
fprintf(stderr, "ASSERT at %s:%d:%s()\n", file, line, func);
va_start(args, format);
vfprintf(stderr, format, args);
va_end(args);
fprintf(stderr, "\n"
" PID: %-8u COMM: %s\n"
#if defined(__APPLE__)
" TID: %-8" PRIu64 " NAME: %s\n",
#else
" TID: %-8u NAME: %s\n",
#endif
getpid(), libspl_getprogname(),
libspl_gettid(), tname);
libspl_dump_backtrace();
#if !__has_feature(attribute_analyzer_noreturn) && !defined(__COVERITY__)
if (libspl_assert_ok) {
pthread_mutex_unlock(&assert_lock);
return;
}
#endif
abort();
}
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