| // Copyright 2020 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "threads_impl.h" |
| |
| // GWP_ASAN_PLATFORM_TLS_HEADER tells the gwp_asan sources to include this file |
| // and call this function instead of using a `thread_local` variable of its |
| // own. |
| // |
| // TODO(fxbug.dev/64175): Our current combined libc/dynamic linker |
| // implementation does not allow libc itself to have any `thread_local` |
| // variables of its own. In future, a different dynamic linker implementation |
| // will likely remove this restriction and having gwp_asan use a (hidden |
| // visibility) `thread_local` variable will work fine. |
| |
| namespace gwp_asan { |
| |
| // This header is always included in a context where ThreadLocalPackedVariables |
| // has already been declared. |
| |
| inline ThreadLocalPackedVariables* getThreadLocals() { |
| auto* ptr = &__pthread_self()->gwp_asan_tsd; |
| static_assert(sizeof(*ptr) >= sizeof(ThreadLocalPackedVariables)); |
| static_assert(alignof(decltype(*ptr)) >= alignof(ThreadLocalPackedVariables)); |
| return reinterpret_cast<ThreadLocalPackedVariables*>(ptr); |
| } |
| |
| } // namespace gwp_asan |
