diff options
Diffstat (limited to 'source')
| -rw-r--r-- | source/fitz/memento.c | 184 |
1 files changed, 183 insertions, 1 deletions
diff --git a/source/fitz/memento.c b/source/fitz/memento.c index 5d87c1ee..8a673135 100644 --- a/source/fitz/memento.c +++ b/source/fitz/memento.c @@ -317,9 +317,186 @@ enum #if defined(MEMENTO_STACKTRACE_METHOD) && MEMENTO_STACKTRACE_METHOD == 1 extern size_t backtrace(void **, int); extern void backtrace_symbols_fd(void **, size_t, int); +extern char **backtrace_symbols(void **, size_t); + +/* Libbacktrace gubbins */ +#ifdef HAVE_LIBDL +#include <dlfcn.h> +#endif + +typedef void (*backtrace_error_callback) (void *data, const char *msg, int errnum); + +typedef struct backtrace_state *(*backtrace_create_state_type)( + const char *filename, int threaded, + backtrace_error_callback error_callback, void *data); + +typedef int (*backtrace_full_callback) (void *data, uintptr_t pc, + const char *filename, int lineno, + const char *function); + +typedef int (*backtrace_pcinfo_type)(struct backtrace_state *state, + uintptr_t pc, + backtrace_full_callback callback, + backtrace_error_callback error_callback, + void *data); + +typedef void (*backtrace_syminfo_callback) (void *data, uintptr_t pc, + const char *symname, + uintptr_t symval, + uintptr_t symsize); + +typedef int (*backtrace_syminfo_type)(struct backtrace_state *state, + uintptr_t addr, + backtrace_syminfo_callback callback, + backtrace_error_callback error_callback, + void *data); + +static backtrace_syminfo_type backtrace_syminfo; +static backtrace_create_state_type backtrace_create_state; +static backtrace_pcinfo_type backtrace_pcinfo; +static struct backtrace_state *my_backtrace_state; +static void *libbt; +static void (*print_stack_value)(void *address); +static char backtrace_exe[4096]; +static void *current_addr; + +#ifdef HAVE_LIBDL +static void error2_cb(void *data, const char *msg, int errnum) +{ +} + +static void syminfo_cb(void *data, uintptr_t pc, const char *symname, uintptr_t symval, uintptr_t symsize) +{ + if (sizeof(void *) == 4) + fprintf(stderr, " 0x%08lx %s\n", pc, symname?symname:"?"); + else + fprintf(stderr, " 0x%016lx %s\n", pc, symname?symname:"?"); +} + +static void error_cb(void *data, const char *msg, int errnum) +{ + backtrace_syminfo(my_backtrace_state, + (uintptr_t)current_addr, + syminfo_cb, + error2_cb, + NULL); +} + +static int full_cb(void *data, uintptr_t pc, const char *fname, int line, const char *fn) +{ + if (sizeof(void *) == 4) + fprintf(stderr, " 0x%08lx %s(%s:%d)\n", pc, fn?fn:"?", fname?fname:"?", line); + else + fprintf(stderr, " 0x%016lx %s(%s:%d)\n", pc, fn?fn:"?", fname?fname:"?", line); + return 0; +} + +static void print_stack_libbt(void *addr) +{ + current_addr = addr; + backtrace_pcinfo(my_backtrace_state, + (uintptr_t)addr, + full_cb, + error_cb, + NULL); +} + +static void print_stack_libbt_failed(void *addr) +{ + char **strings = backtrace_symbols(&addr, 1); + + if (strings == NULL || strings[0] == NULL) + { + if (sizeof(void *) == 4) + fprintf(stderr, " [0x%08lx]\n", (uintptr_t)addr); + else + fprintf(stderr, " [0x%016lx]\n", (uintptr_t)addr); + } + else + { + fprintf(stderr, " %s\n", strings[0]); + } + (free)(strings); +} + +static int init_libbt(void) +{ + libbt = dlopen("libbacktrace.so", RTLD_LAZY); + if (libbt == NULL) + libbt = dlopen("/opt/lib/libbacktrace.so", RTLD_LAZY); + if (libbt == NULL) + libbt = dlopen("/lib/libbacktrace.so", RTLD_LAZY); + if (libbt == NULL) + libbt = dlopen("/usr/lib/libbacktrace.so", RTLD_LAZY); + if (libbt == NULL) + libbt = dlopen("/usr/local/lib/libbacktrace.so", RTLD_LAZY); + if (libbt == NULL) + goto fail; + + backtrace_create_state = dlsym(libbt, "backtrace_create_state"); + backtrace_syminfo = dlsym(libbt, "backtrace_syminfo"); + backtrace_pcinfo = dlsym(libbt, "backtrace_pcinfo"); + + if (backtrace_create_state == NULL || + backtrace_syminfo == NULL || + backtrace_pcinfo == NULL) + { + goto fail; + } + + my_backtrace_state = backtrace_create_state(backtrace_exe, + 1 /*BACKTRACE_SUPPORTS_THREADS*/, + error_cb, + NULL); + if (my_backtrace_state == NULL) + goto fail; + + print_stack_value = print_stack_libbt; + + return 1; + + fail: + libbt = NULL; + backtrace_create_state = NULL; + backtrace_syminfo = NULL; + print_stack_value = print_stack_libbt_failed; + return 0; +} +#endif + +static void print_stack_default(void *addr) +{ + char **strings = backtrace_symbols(&addr, 1); + + if (strings == NULL || strings[0] == NULL) + { + fprintf(stderr, " [0x%p]\n", addr); + } +#ifdef HAVE_LIBDL + else if (strchr(strings[0], ':') == NULL) + { + /* Probably a "path [address]" format string */ + char *s = strchr(strings[0], ' '); + + if (s != strings[0]) + { + memcpy(backtrace_exe, strings[0], s - strings[0]); + backtrace_exe[s-strings[0]] = 0; + if (init_libbt()) + print_stack_value(addr); + } + } +#endif + else + { + fprintf(stderr, " %s\n", strings[0]); + } + free(strings); +} static void Memento_initStacktracer(void) { + print_stack_value = print_stack_default; } static int Memento_getStacktrace(void **stack) @@ -337,7 +514,12 @@ static int Memento_getStacktrace(void **stack) static void Memento_showStacktrace(void **stack, int numberOfFrames) { - backtrace_symbols_fd(stack, (size_t)numberOfFrames, 2); + int i; + + for (i = 0; i < numberOfFrames; i++) + { + print_stack_value(stack[i]); + } } #elif defined(MEMENTO_STACKTRACE_METHOD) && MEMENTO_STACKTRACE_METHOD == 2 #include <Windows.h> |