diff options
| author | Alan Wu <alanwu@ruby-lang.org> | 2021-10-20 19:04:22 -0400 |
|---|---|---|
| committer | Alan Wu <alanwu@ruby-lang.org> | 2021-10-20 19:04:22 -0400 |
| commit | 6a9e2b3cc381fd1b6c5ec5eddb077ea5468ef75e (patch) | |
| tree | ba37c7ac5cd57483638f052b52be95147c12dcae /yjit_asm.c | |
| parent | 00be5846e4793b718da19dafec3f4ecf2d6d0692 (diff) | |
YJIT: Show GCC that the mmap probing loop runs at least once
Fixes:
./src/yjit_asm.c:196:8: warning: 'mem_block' may be used uninitialized [-Wmaybe-uninitialized]
Diffstat (limited to 'yjit_asm.c')
| -rw-r--r-- | yjit_asm.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/yjit_asm.c b/yjit_asm.c index 5e433f5ea4..0d074d5e4d 100644 --- a/yjit_asm.c +++ b/yjit_asm.c @@ -158,8 +158,7 @@ uint8_t *alloc_exec_mem(uint32_t mem_size) uint32_t page_size = (uint32_t)sysconf(_SC_PAGESIZE); 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 mem_block = (uint8_t*)mmap( (void*)req_addr, @@ -177,7 +176,7 @@ uint8_t *alloc_exec_mem(uint32_t mem_size) // +4MB req_addr += 4 * 1024 * 1024; - } + } while (req_addr < (uint8_t*)&alloc_exec_mem + INT32_MAX); // On MacOS and other platforms #else |