mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
af645fcbec
- Add Lua backtraces to redbean! - Wipe serving keys after redbean forks - Audit redbean to remove free via exit - Log SSL client ciphersuite preferences - Increase ASAN malloc() backtrace depth - Make GetSslRoots() behave as a singleton - Move leaks.c from LIBC_TESTLIB to LIBC_LOG - Add undocumented %n to printf() for newlines - Fix redbean memory leak reindexing inode change - Fix redbean memory leak with Fetch() DNS object - Restore original environ after __cxa_finalize() - Make backtrace always work after __cxa_finalize() - Introduce COUNTEXPR() diagnostic / benchmark tool - Fix a few more instances of errno being clobbered - Consolidate the ANSI color disabling internal APIs
74 lines
3.1 KiB
C
74 lines
3.1 KiB
C
#if 0
|
||
/*─────────────────────────────────────────────────────────────────╗
|
||
│ To the extent possible under law, Justine Tunney has waived │
|
||
│ all copyright and related or neighboring rights to this file, │
|
||
│ as it is written in the following disclaimers: │
|
||
│ • http://unlicense.org/ │
|
||
│ • http://creativecommons.org/publicdomain/zero/1.0/ │
|
||
╚─────────────────────────────────────────────────────────────────*/
|
||
#endif
|
||
#include "libc/bits/bits.h"
|
||
#include "libc/dce.h"
|
||
#include "libc/log/log.h"
|
||
#include "libc/mem/mem.h"
|
||
#include "libc/runtime/runtime.h"
|
||
#include "libc/stdio/stdio.h"
|
||
#include "libc/str/str.h"
|
||
|
||
/**
|
||
* ASAN heap memory safety crash example.
|
||
*
|
||
* make -j8 MODE=dbg o/dbg/examples/auto-memory-safety-crash2.com
|
||
* o/dbg/examples/auto-memory-safety-crash2.com
|
||
*
|
||
* You should see:
|
||
*
|
||
* heap overrun 1-byte store at 0x10008004002d shadow 0x20090000005
|
||
* ./o/dbg/examples/auto-memory-safety-crash2.com
|
||
* x
|
||
* OOOOOOOOOOOUUUUUUUUUUUUUUUU.............OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
|
||
* |-7 |-6 |-6 |0 |5 |-7 |-7 |-7 |-7
|
||
* »!@ ÿ▄:Y╩≥= S hello ∙∙∙∙∙∙∙ ♪ GT◘&@ á+@ »!@
|
||
* 000000400000-00000042b000 .text
|
||
* 00000042b000-00000042d000 .data
|
||
* 00007fff0000-00008000ffff
|
||
* 000080070000-00008008ffff
|
||
* 02008fff0000-02009000ffff ←shadow
|
||
* 0e007fff0000-0e008000ffff
|
||
* 10003ab90000-10003abaffff
|
||
* 100080000000-10008000ffff ←address
|
||
* 6ffffffe0000-6fffffffffff
|
||
*
|
||
* the memory was allocated by
|
||
* 0x100080040020 64 bytes [dlmalloc]
|
||
* 0x100080040030 13 bytes [actual]
|
||
* 402608 main
|
||
* 402ba0 cosmo
|
||
* 4021af _start
|
||
*
|
||
* the crash was caused by
|
||
* 0x0000000000404793: __die at libc/log/die.c:40
|
||
* 0x0000000000404f56: __asan_report_store at libc/intrin/asan.c:1183
|
||
* 0x0000000000402579: main at examples/auto-memory-safety-crash2.c:30
|
||
* 0x000000000040270f: cosmo at libc/runtime/cosmo.S:64
|
||
* 0x00000000004021ae: _start at libc/crt/crt.S:77
|
||
*
|
||
* @see libc/intrin/asancodes.h for meaning of U, O, etc. and negative numbers
|
||
* @see libc/nexgen32e/kcp437.S for meaning of symbols
|
||
*/
|
||
|
||
int main(int argc, char *argv[]) {
|
||
if (!IsAsan()) {
|
||
printf("this example is intended for MODE=asan or MODE=dbg\n");
|
||
exit(1);
|
||
}
|
||
char *buffer;
|
||
ShowCrashReports(); /* not needed but yoinks appropriate symbols */
|
||
buffer = malloc(13);
|
||
strcpy(buffer, "hello");
|
||
int i = 13;
|
||
asm("" : "+r"(i)); /* prevent compiler being smart */
|
||
buffer[i] = 1;
|
||
asm("" : "+r"(buffer)); /* prevent compiler being smart */
|
||
return 0;
|
||
}
|