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YJIT: Show GCC that the mmap probing loop runs at least once

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Fixes:
    ./src/yjit_asm.c:196:8: warning: 'mem_block' may be used uninitialized [-Wmaybe-uninitialized]
This commit is contained in:
Alan Wu 2021-10-20 19:04:22 -04:00
parent 00be5846e4
commit 6a9e2b3cc3
1 changed files with 2 additions and 3 deletions
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5
yjit_asm.c
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@ -158,8 +158,7 @@ uint8_t *alloc_exec_mem(uint32_t mem_size)
uint32_t page_size = (uint32_t)sysconf(_SC_PAGESIZE); uint32_t page_size = (uint32_t)sysconf(_SC_PAGESIZE);
uint8_t *req_addr = align_ptr((uint8_t*)&alloc_exec_mem, page_size); uint8_t *req_addr = align_ptr((uint8_t*)&alloc_exec_mem, page_size);
while (req_addr < (uint8_t*)&alloc_exec_mem + INT32_MAX) do {
{
// Try to map a chunk of memory as executable // Try to map a chunk of memory as executable
mem_block = (uint8_t*)mmap( mem_block = (uint8_t*)mmap(
(void*)req_addr, (void*)req_addr,
@ -177,7 +176,7 @@ uint8_t *alloc_exec_mem(uint32_t mem_size)
// +4MB // +4MB
req_addr += 4 * 1024 * 1024; req_addr += 4 * 1024 * 1024;
} } while (req_addr < (uint8_t*)&alloc_exec_mem + INT32_MAX);
// On MacOS and other platforms // On MacOS and other platforms
#else #else