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9b6718ac99
We're now able to rewind the instruction pointer in x86 backtraces. This helps ensure addr2line cannot print information about unrelated adjacent code. I've restored -fno-schedule-insns2 in most cases because it really does cause unpredictable breakage for backtraces.
48 lines
1.6 KiB
C
48 lines
1.6 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/intrin/kprintf.h"
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#include "libc/math.h"
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#include "libc/runtime/runtime.h"
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#include "libc/runtime/symbols.internal.h"
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#include "libc/stdio/stdio.h"
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/**
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* @fileoverview How to print backtraces and cpu state on crash.
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*
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* make -j8 -O o//examples/crashreport.com
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* o//examples/crashreport.com
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*
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* To prevent the GDB GUI from popping up:
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*
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* export GDB=
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* make -j8 -O o//examples/crashreport.com
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* o//examples/crashreport.com
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*/
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int Divide(int x, int y) {
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volatile int z = 0; // force creation of stack frame
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return x / y + z;
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}
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int (*pDivide)(int, int) = Divide;
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dontubsan int main(int argc, char *argv[]) {
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kprintf("----------------\n");
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kprintf(" THIS IS A TEST \n");
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kprintf("SIMULATING CRASH\n");
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kprintf("----------------\n");
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ShowCrashReports();
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pDivide(1, 0);
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pDivide(2, 0);
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pDivide(3, 0);
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}
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