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libspl: lift backtrace into a separate file

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If it's going to be used directly by zdb/ztest, then it sort of doesn't
make sense to carry it with the assert code.

Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes #16181
This commit is contained in:
Rob Norris
2024-05-10 11:26:11 +10:00
committed by Brian Behlendorf
parent e7b451941b
commit 3974ef045e
12 changed files with 426 additions and 79 deletions
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lib/libspl/assert.c
+2 -53
View File
@@ -28,6 +28,7 @@
#include <assert.h>
#include <pthread.h>
#include <sys/backtrace.h>
#if defined(__linux__)
#include <errno.h>
@@ -51,58 +52,6 @@
pthread_getname_np(pthread_self(), buf, len);
#endif
#if defined(HAVE_LIBUNWIND)
#define UNW_LOCAL_ONLY
#include <libunwind.h>
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>
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
void
libspl_dump_backtrace(void)
{
}
#endif
#if defined(__APPLE__)
static inline uint64_t
libspl_gettid(void)
@@ -154,7 +103,7 @@ libspl_assertf(const char *file, const char *func, int line,
getpid(), libspl_getprogname(),
libspl_gettid(), tname);
libspl_dump_backtrace();
libspl_backtrace();
#if !__has_feature(attribute_analyzer_noreturn) && !defined(__COVERITY__)
if (libspl_assert_ok) {