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frida-asan: only unpoison readable/writeable memory

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This significantly reduces the working set.
This commit is contained in:
s1341 2021-04-30 09:46:32 +03:00
parent e62f4de6b5
commit a6e21989e4
1 changed files with 6 additions and 6 deletions
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12
libafl_frida/src/asan_rt.rs
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@ -770,13 +770,13 @@ impl AsanRuntime {
/// Unpoison all the memory that is currently mapped with read/write permissions.
fn unpoison_all_existing_memory(&self) {
let mut allocator = Allocator::get();
walk_self_maps(&mut |start, end, _permissions, _path| {
//if permissions.as_bytes()[0] == b'r' || permissions.as_bytes()[1] == b'w' {
if allocator.pre_allocated_shadow && start == 1 << allocator.shadow_bit {
return false;
walk_self_maps(&mut |start, end, permissions, _path| {
if permissions.as_bytes()[0] == b'r' || permissions.as_bytes()[1] == b'w' {
if allocator.pre_allocated_shadow && start == 1 << allocator.shadow_bit {
return false;
}
allocator.map_shadow_for_region(start, end, true);
}
allocator.map_shadow_for_region(start, end, true);
//}
false
});
}