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6f7d0cb1c3
This makes breaking changes to add underscores to many non-standard function names provided by the c library. MODE=tiny is now tinier and we now use smaller locks that are better for tiny apps in this mode. Some headers have been renamed to be in the same folder as the build package, so it'll be easier to know which build dependency is needed. Certain old misguided interfaces have been removed. Intel intrinsics headers are now listed in libc/isystem (but not in the amalgamation) to help further improve open source compatibility. Header complexity has also been reduced. Lastly, more shell scripts are now available.
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/log/log.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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volatile int64_t x;
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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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