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https://github.com/jart/cosmopolitan.git
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0d748ad58e
This change fixes Cosmopolitan so it has fewer opinions about compiler warnings. The whole repository had to be cleaned up to be buildable in -Werror -Wall mode. This lets us benefit from things like strict const checking. Some actual bugs might have been caught too.
53 lines
2.1 KiB
C
53 lines
2.1 KiB
C
#if 0
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/*─────────────────────────────────────────────────────────────────╗
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│ To the extent possible under law, Justine Tunney has waived │
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│ all copyright and related or neighboring rights to this file, │
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│ as it is written in the following disclaimers: │
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│ • http://unlicense.org/ │
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│ • http://creativecommons.org/publicdomain/zero/1.0/ │
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╚─────────────────────────────────────────────────────────────────*/
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#endif
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/sigset.h"
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#include "libc/runtime/runtime.h"
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#include "libc/stdio/stdio.h"
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/**
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* @fileoverview CTRL+\ debugging example
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*
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* make -j8 -O o//examples/crashreport2.com
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* o//examples/crashreport2.com
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*
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* Assuming you call ShowCrashReports() from main(), you can press
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* `CTRL+\` at anny time to generate a `SIGQUIT` message that lets you
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* debug wrongness and freezups.
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*
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* On supported platforms, this will cause GDB to automatically attach.
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* The nice thing about this, is you can start stepping through your
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* code at the precise instruction where the interrupt happened. See
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* `libc/log/attachdebugger.c` to see how it works.
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*
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* If you wish to suppress the auto-GDB behavior, then:
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*
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* export GDB=
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*
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* Or alternatively:
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*
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* extern int __isworker;
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* __isworker = true;
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*
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* Will cause your `SIGQUIT` handler to just print a crash report
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* instead. This is useful for production software that might be running
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* in a terminal environment like GNU Screen, but it's not desirable to
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* have ten worker processes trying to attach GDB at once.
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*/
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int main(int argc, char *argv[]) {
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ShowCrashReports();
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printf("please press ctrl+\\ and see what happens...\n");
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sigsuspend(0);
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printf("\n\n");
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printf("congratulations! your program is now resuming\n");
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return 0;
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}
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