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Merge pull request #1376 from jasonKercher/master

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Added zeroing to new memory regions from _unix_realloc
This commit is contained in:
gingerBill
2022-02-05 12:26:10 +00:00
committed by GitHub
parent 1553137c23 e5868e3205
commit fb710f8cbf
4 changed files with 16 additions and 2 deletions
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12
core/os/os.odin
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@@ -206,11 +206,19 @@ heap_allocator_proc :: proc(allocator_data: rawptr, mode: mem.Allocator_Mode,
}
}
aligned_resize :: proc(p: rawptr, old_size: int, new_size: int, new_alignment: int) -> ([]byte, mem.Allocator_Error) {
aligned_resize :: proc(p: rawptr, old_size: int, new_size: int, new_alignment: int) -> (new_memory: []byte, err: mem.Allocator_Error) {
if p == nil {
return nil, nil
}
return aligned_alloc(new_size, new_alignment, p)
new_memory = aligned_alloc(new_size, new_alignment, p) or_return
// NOTE: heap_resize does not zero the new memory, so we do it
if new_size > old_size {
new_region := mem.raw_data(new_memory[old_size:])
mem.zero(new_region, new_size - old_size)
}
return
}
switch mode {

2
core/os/os_darwin.odin
View File

@@ -553,6 +553,8 @@ heap_alloc :: proc(size: int) -> rawptr {
return _unix_calloc(1, size)
}
heap_resize :: proc(ptr: rawptr, new_size: int) -> rawptr {
// NOTE: _unix_realloc doesn't guarantee new memory will be zeroed on
// POSIX platforms. Ensure your caller takes this into account.
return _unix_realloc(ptr, new_size)
}
heap_free :: proc(ptr: rawptr) {

2
core/os/os_freebsd.odin
View File

@@ -378,6 +378,8 @@ heap_alloc :: proc(size: int) -> rawptr {
}
heap_resize :: proc(ptr: rawptr, new_size: int) -> rawptr {
// NOTE: _unix_realloc doesn't guarantee new memory will be zeroed on
// POSIX platforms. Ensure your caller takes this into account.
return _unix_realloc(ptr, c.size_t(new_size));
}

2
core/os/os_linux.odin
View File

@@ -727,6 +727,8 @@ heap_alloc :: proc(size: int) -> rawptr {
}
heap_resize :: proc(ptr: rawptr, new_size: int) -> rawptr {
// NOTE: _unix_realloc doesn't guarantee new memory will be zeroed on
// POSIX platforms. Ensure your caller takes this into account.
return _unix_realloc(ptr, c.size_t(new_size))
}