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Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 32 |
1 files changed, 32 insertions, 0 deletions
@@ -1,5 +1,37 @@ 2014-03-13 Kaz Kylheku <kaz@kylheku.com> + On platforms with sigaltstack, TXR programs can now catch the + segmentation fault that occurs when running out of stack space, + and escape by throwing an exception. + + Also, bugfix: save and restore the gc enable/disable state. Without + this, if we are ever running cod in a gc disabled state and it jumps + out, gc stays disabled. + + * configure: added check for sigaltstack. + + * gc.h (gc_enabled): Declaration added for existing variable. + + * signal.c (is_cpu_exception): New static function. + (sig_handler): For cpu_exception type signals that pertain + to the execution of some instruction, turn on async_sig_enabled, + so that the signal is not deferred. Otherwise we will just + return without calling the user-defined handler, restart + the instruction and get into a loop. Also, disable gc around + the handler just in case. One issue is that we might be on + an alternate stack, which gc won't like. + (setup_alt_stack, teardown_alt_stack): New static functions. + (set_sig_handler): If we have sigaltstack, and are asked + to set up a SEGV handler, then set it up on the alternate + stack. + + * signal.h (extended_jmp_buf): Adding new member, gc. + (extended_setjmp, extended_longjmp): use gc member + to save and restore the gc_enable state across + setjmp and longjmp. + +2014-03-13 Kaz Kylheku <kaz@kylheku.com> + * stream.c (open_process): If execvp fails, use errno as the exit status. (sh, run): New static functions. |