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macOS: anonymous page ID make it as env var.

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This commit is contained in:
David Carlier 2019-08-27 18:43:50 +01:00
parent 2c19388bcf
commit b72a2d9659
3 changed files with 6 additions and 2 deletions
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4
src/os.c
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@ -288,7 +288,9 @@ static void* mi_unix_mmap(size_t size, size_t try_alignment, int protect_flags)
#endif
#if defined(VM_MAKE_TAG)
// macOS: tracking anonymous page with a specific ID. (All up to 98 are taken officially but LLVM sanitizers had taken 99)
fd = VM_MAKE_TAG(100);
int os_tag = (int)mi_option_get(mi_option_os_tag);
if (os_tag < 100 || os_tag > 255) os_tag = 100;
fd = VM_MAKE_TAG(os_tag);
#endif
if (use_large_os_page(size, try_alignment)) {
static volatile _Atomic(uintptr_t) large_page_try_ok; // = 0;