PiJoules 78c5d68029
[asan] Add size/alignment checks for free_[aligned_]sized (#189216)
Historically, alignment and size weren't taken into account when freeing
allocations since `free` just takes a pointer. With `free_sized` and
`free_aligned_sized`, we can do these size and alignment checks in asan
now. This adds a new report type specifically for these functions.

Checking is hidden behind a new env flag `free_size_mismatch` which is
enabled by default, but downstream users can opt out of it.

The bulk of this PR was generated by gemini but thoroughly reviewed and
edited by me to the best of my ability.
2026-03-31 19:10:43 +00:00
..
2024-07-12 11:18:40 -07:00
2019-08-21 05:06:21 +00:00

AddressSanitizer RT
================================
This directory contains sources of the AddressSanitizer (ASan) runtime library.

Directory structure:
README.txt       : This file.
Makefile.mk      : File for make-based build.
CMakeLists.txt   : File for cmake-based build.
asan_*.{cc,h}    : Sources of the asan runtime library.
scripts/*        : Helper scripts.
tests/*          : ASan unit tests.

Also ASan runtime needs the following libraries:
lib/interception/      : Machinery used to intercept function calls.
lib/sanitizer_common/  : Code shared between various sanitizers.

ASan runtime currently also embeds part of LeakSanitizer runtime for
leak detection (lib/lsan/lsan_common.{cc,h}).

ASan runtime can only be built by CMake. You can run ASan tests
from the root of your CMake build tree:

make check-asan

For more instructions see:
https://github.com/google/sanitizers/wiki/AddressSanitizerHowToBuild