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Don't free virtual memory when ThreadSanitizer is active

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This is a workaround for a lack of an ability to tell TSan that it
should clear any state it has about certain memory ranges to prevent
false positives.
This commit is contained in:
Feoramund
2025-05-09 17:34:33 -04:00
parent 78006adf67
commit acc877b3a7
1 changed files with 13 additions and 1 deletions
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14
base/runtime/virtual_memory.odin
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@@ -65,7 +65,19 @@ allocate_virtual_memory_aligned :: proc "contextless" (size: int, alignment: int
Free virtual memory allocated by any of the `allocate_*` procs.
*/
free_virtual_memory :: proc "contextless" (ptr: rawptr, size: int) {
_free_virtual_memory(ptr, size)
// TODO: There is currently no good way to tell ThreadSanitizer that we're
// done with a region of memory and to clear any information it has about
// it, so that when it's enabled, we simply do not release any memory back
// to the operating system.
//
// This prevents all false positive warnings when one thread inevitably
// gives up some of its memory that is then re-assigned to a different
// thread by the operating system.
//
// This is a workaround for the time being.
when .Thread not_in ODIN_SANITIZER_FLAGS {
_free_virtual_memory(ptr, size)
}
}
/*