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Fill uninitialized memory with int3

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Maxime Chevalier-Boisvert 2021-04-06 11:24:58 -04:00 committed by Alan Wu
parent 131fc9c074
commit 3d53ee1761
1 changed files with 5 additions and 0 deletions
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5
yjit_asm.c
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@ -3,6 +3,7 @@
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h>
#include <stdarg.h> #include <stdarg.h>
#include <assert.h> #include <assert.h>
@ -154,6 +155,10 @@ uint8_t* alloc_exec_mem(uint32_t mem_size)
exit(-1); exit(-1);
} }
// Fill the executable memory with 0x13 so that
// executing uninitialized memory will fault
memset(mem_block, 0xCC, mem_size);
return mem_block; return mem_block;
#else #else
return NULL; return NULL;