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| author | Maxime Chevalier-Boisvert <maxime.chevalierboisvert@shopify.com> | 2021-04-06 11:24:58 -0400 |
|---|---|---|
| committer | Alan Wu <XrXr@users.noreply.github.com> | 2021-10-20 18:19:32 -0400 |
| commit | 3d53ee17616d9c028d2b537989c4cd2e1d08261b (patch) | |
| tree | 73e9f6bf35be0898b389c008d387cadb9fd3758c /yjit_asm.c | |
| parent | 131fc9c074d464c6baa548ab89a1d1d1dcc5c571 (diff) | |
Fill uninitialized memory with int3
Diffstat (limited to 'yjit_asm.c')
| -rw-r--r-- | yjit_asm.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/yjit_asm.c b/yjit_asm.c index fc8472f077..78c9255d65 100644 --- a/yjit_asm.c +++ b/yjit_asm.c @@ -3,6 +3,7 @@ #include <stdio.h> #include <stdlib.h> +#include <string.h> #include <stdarg.h> #include <assert.h> @@ -154,6 +155,10 @@ uint8_t* alloc_exec_mem(uint32_t mem_size) exit(-1); } + // Fill the executable memory with 0x13 so that + // executing uninitialized memory will fault + memset(mem_block, 0xCC, mem_size); + return mem_block; #else return NULL; |