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1//===-- dfsan_thread.h ------------------------------------------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file is a part of DataFlowSanitizer.10//11//===----------------------------------------------------------------------===//12 13#ifndef DFSAN_THREAD_H14#define DFSAN_THREAD_H15 16#include "dfsan_allocator.h"17#include "sanitizer_common/sanitizer_common.h"18#include "sanitizer_common/sanitizer_posix.h"19 20namespace __dfsan {21 22class DFsanThread {23 public:24 // NOTE: There is no DFsanThread constructor. It is allocated25 // via mmap() and *must* be valid in zero-initialized state.26 27 static DFsanThread *Create(thread_callback_t start_routine, void *arg,28 bool track_origins = false);29 static void TSDDtor(void *tsd);30 void Destroy();31 32 void Init(); // Should be called from the thread itself.33 thread_return_t ThreadStart();34 35 uptr stack_top();36 uptr stack_bottom();37 uptr tls_begin() { return tls_begin_; }38 uptr tls_end() { return tls_end_; }39 bool IsMainThread() { return start_routine_ == nullptr; }40 41 bool InSignalHandler() { return in_signal_handler_; }42 void EnterSignalHandler() { in_signal_handler_++; }43 void LeaveSignalHandler() { in_signal_handler_--; }44 45 DFsanThreadLocalMallocStorage &malloc_storage() { return malloc_storage_; }46 47 int destructor_iterations_;48 __sanitizer_sigset_t starting_sigset_;49 50 private:51 void SetThreadStackAndTls();52 void ClearShadowForThreadStackAndTLS();53 struct StackBounds {54 uptr bottom;55 uptr top;56 };57 StackBounds GetStackBounds() const;58 59 bool AddrIsInStack(uptr addr);60 61 thread_callback_t start_routine_;62 void *arg_;63 bool track_origins_;64 65 StackBounds stack_;66 67 uptr tls_begin_;68 uptr tls_end_;69 70 unsigned in_signal_handler_;71 72 DFsanThreadLocalMallocStorage malloc_storage_;73};74 75DFsanThread *GetCurrentThread();76void SetCurrentThread(DFsanThread *t);77void DFsanTSDInit(void (*destructor)(void *tsd));78void DFsanTSDDtor(void *tsd);79 80} // namespace __dfsan81 82#endif // DFSAN_THREAD_H83