175 lines
4.3 KiB
C
175 lines
4.3 KiB
C
/*
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* NOTE TO FreeBSD users. Install libexecinfo from
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* ports/devel/libexecinfo and add -lexecinfo to LDFLAGS
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* to add backtrace support.
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*/
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#include "e.h"
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#ifdef HAVE_EXECINFO_H
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# include <execinfo.h>
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#endif
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static volatile Eina_Bool _e_x_composite_shutdown_try = 0;
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static void
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_e_x_composite_shutdown(void)
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{
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// Ecore_X_Display *dpy;
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Ecore_X_Window root;
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if (_e_x_composite_shutdown_try) return; /* we failed :-( */
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_e_x_composite_shutdown_try = 1;
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// dpy = ecore_x_display_get();
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root = ecore_x_window_root_first_get();
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/* ignore errors, we really don't care at this point */
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ecore_x_composite_unredirect_subwindows(root, ECORE_X_COMPOSITE_UPDATE_MANUAL);
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_e_x_composite_shutdown_try = 0;
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}
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#define _e_write_safe(fd, buf) _e_write_safe_int(fd, buf, sizeof(buf))
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static void
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_e_write_safe_int(int fd, const char *buf, size_t size)
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{
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while (size > 0)
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{
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ssize_t done = write(fd, buf, size);
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if (done >= 0)
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{
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buf += done;
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size -= done;
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}
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else
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{
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if ((errno == EAGAIN) || (errno == EINTR))
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continue;
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else
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{
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perror("write");
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return;
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}
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}
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}
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}
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static void
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_e_gdb_print_backtrace(int fd)
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{
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char cmd[1024];
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size_t size;
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int ret;
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// FIXME: we are in a segv'd state. do as few function calls and things
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// depending on a known working state as possible. this also prevents the
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// white box allowing recovery or deeper gdbing, thus until this works
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// properly, it's disabled (properly means always reliable, always
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// printf bt and allows e to continue and pop up box, perferably allowing
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// debugging in the gui etc. etc.
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return;
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if (getenv("E_NO_GDB_BACKTRACE"))
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return;
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size = snprintf(cmd, sizeof(cmd),
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"gdb --pid=%d "
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"-ex 'thread apply all bt' "
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"-ex detach -ex quit", getpid());
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if (size >= sizeof(cmd))
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return;
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_e_write_safe(fd, "EXECUTING GDB AS: ");
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_e_write_safe_int(fd, cmd, size);
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_e_write_safe(fd, "\n");
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ret = system(cmd); // TODO: use popen() or fork()+pipe()+exec() and save to 'fd'
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}
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#define _e_backtrace(msg) _e_backtrace_int(2, msg, sizeof(msg))
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static void
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_e_backtrace_int(int fd, const char *msg, size_t msg_len)
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{
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char attachmsg[1024];
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void *array[255];
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size_t size;
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return; // disable. causes hangs and problems
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_e_write_safe_int(fd, msg, msg_len);
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_e_write_safe(fd, "\nBEGIN TRACEBACK\n");
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size = backtrace(array, 255);
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backtrace_symbols_fd(array, size, fd);
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_e_write_safe(fd, "END TRACEBACK\n");
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size = snprintf(attachmsg, sizeof(attachmsg),
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"debug with: gdb --pid=%d\n", getpid());
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if (size < sizeof(attachmsg))
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_e_write_safe_int(fd, attachmsg, size);
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_e_gdb_print_backtrace(fd);
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}
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/* a tricky little devil, requires e and it's libs to be built
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* with the -rdynamic flag to GCC for any sort of decent output.
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*/
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EAPI void
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e_sigseg_act(int x __UNUSED__, siginfo_t *info __UNUSED__, void *data __UNUSED__)
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{
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_e_backtrace("**** SEGMENTATION FAULT ****");
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_e_x_composite_shutdown();
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ecore_x_pointer_ungrab();
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ecore_x_keyboard_ungrab();
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ecore_x_ungrab();
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ecore_x_sync();
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e_alert_show(SIGSEGV);
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}
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EAPI void
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e_sigill_act(int x __UNUSED__, siginfo_t *info __UNUSED__, void *data __UNUSED__)
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{
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_e_backtrace("**** ILLEGAL INSTRUCTION ****");
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_e_x_composite_shutdown();
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ecore_x_pointer_ungrab();
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ecore_x_keyboard_ungrab();
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ecore_x_ungrab();
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ecore_x_sync();
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e_alert_show(SIGILL);
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}
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EAPI void
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e_sigfpe_act(int x __UNUSED__, siginfo_t *info __UNUSED__, void *data __UNUSED__)
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{
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_e_backtrace("**** FLOATING POINT EXCEPTION ****");
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_e_x_composite_shutdown();
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ecore_x_pointer_ungrab();
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ecore_x_keyboard_ungrab();
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ecore_x_ungrab();
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ecore_x_sync();
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e_alert_show(SIGFPE);
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}
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EAPI void
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e_sigbus_act(int x __UNUSED__, siginfo_t *info __UNUSED__, void *data __UNUSED__)
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{
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_e_backtrace("**** BUS ERROR ****");
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_e_x_composite_shutdown();
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ecore_x_pointer_ungrab();
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ecore_x_keyboard_ungrab();
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ecore_x_ungrab();
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ecore_x_sync();
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e_alert_show(SIGBUS);
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}
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EAPI void
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e_sigabrt_act(int x __UNUSED__, siginfo_t *info __UNUSED__, void *data __UNUSED__)
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{
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_e_backtrace("**** ABORT ****");
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_e_x_composite_shutdown();
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ecore_x_pointer_ungrab();
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ecore_x_keyboard_ungrab();
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ecore_x_ungrab();
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ecore_x_sync();
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e_alert_show(SIGABRT);
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}
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