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Fix builds on non-GLIBC systems (missing __GLIBC_PREREQ). Add Solaris stack

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backtrace dumper.
This commit is contained in:
Alan Coopersmith 2005-07-04 00:16:23 +00:00
parent d010de6979
commit 7dc547252a
1 changed files with 76 additions and 1 deletions
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77
hw/xfree86/common/xf86Events.c
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@ -1279,8 +1279,13 @@ xf86InterceptSigIll(void (*sigillhandler)(void))
xf86SigIllHandler = sigillhandler;
}
#if defined(__GLIBC__) && __GLIBC_PREREQ(2, 1)
#if defined(__GLIBC__)
# if __GLIBC_PREREQ(2, 1)
# define HAVE_BACKTRACE
# endif
#endif
#ifdef HAVE_BACKTRACE
#include <execinfo.h>
static __inline__ void xorg_backtrace(void)
@ -1298,8 +1303,78 @@ static __inline__ void xorg_backtrace(void)
#else /* not glibc or glibc < 2.1 */
# if defined(HAVE_WALKCONTEXT) /* Solaris 9 & later */
# include <ucontext.h>
# include <signal.h>
# include <dlfcn.h>
# include <sys/elf.h>
#ifdef _LP64
# define ElfSym Elf64_Sym
#else
# define ElfSym Elf32_Sym
#endif
/* Called for each frame on the stack to print it's contents */
static int xorg_backtrace_frame(uintptr_t pc, int signo, void *arg)
{
Dl_info dlinfo;
ElfSym *dlsym;
char header[32];
int depth = *((int *) arg);
if (signo) {
char signame[SIG2STR_MAX];
if (sig2str(signo, signame) != 0) {
strcpy(signame, "unknown");
}
ErrorF("** Signal %d (%s)\n", signo, signame);
}
snprintf(header, sizeof(header), "%d: 0x%lx", depth, pc);
*((int *) arg) = depth + 1;
/* Ask system dynamic loader for info on the address */
if (dladdr1((void *) pc, &dlinfo, (void **) &dlsym, RTLD_DL_SYMENT)) {
unsigned long offset = pc - (uintptr_t) dlinfo.dli_saddr;
const char *symname;
if (offset < dlsym->st_size) { /* inside a function */
symname = dlinfo.dli_sname;
} else { /* found which file it was in, but not which function */
symname = "<section start>";
offset = pc - (uintptr_t)dlinfo.dli_fbase;
}
ErrorF("%s: %s:%s+0x%lx\n", header, dlinfo.dli_fname,
symname, offset);
} else {
/* Couldn't find symbol info from system dynamic loader, should
* probably poke elfloader here, but haven't written that code yet,
* so we just print the pc.
*/
ErrorF("%s\n", header);
}
return 0;
}
static __inline__ void xorg_backtrace(void) {
ucontext_t u;
int depth = 1;
if (getcontext(&u) == 0)
walkcontext(&u, xorg_backtrace_frame, &depth);
}
# else
/* Default fallback if we can't find any way to get a backtrace */
static __inline__ void xorg_backtrace(void) { return; }
# endif
#endif
/*