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//===-- dfsan_thread.h ------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is a part of DataFlowSanitizer.
//
//===----------------------------------------------------------------------===//
#ifndef DFSAN_THREAD_H
#define DFSAN_THREAD_H
#include "dfsan_allocator.h"
#include "sanitizer_common/sanitizer_common.h"
#include "sanitizer_common/sanitizer_posix.h"
namespace __dfsan {
class DFsanThread {
public:
// NOTE: There is no DFsanThread constructor. It is allocated
// via mmap() and *must* be valid in zero-initialized state.
static DFsanThread *Create(thread_callback_t start_routine, void *arg,
bool track_origins = false);
static void TSDDtor(void *tsd);
void Destroy();
void Init(); // Should be called from the thread itself.
thread_return_t ThreadStart();
uptr stack_top();
uptr stack_bottom();
uptr tls_begin() { return tls_begin_; }
uptr tls_end() { return tls_end_; }
bool IsMainThread() { return start_routine_ == nullptr; }
bool InSignalHandler() { return in_signal_handler_; }
void EnterSignalHandler() { in_signal_handler_++; }
void LeaveSignalHandler() { in_signal_handler_--; }
DFsanThreadLocalMallocStorage &malloc_storage() { return malloc_storage_; }
int destructor_iterations_;
__sanitizer_sigset_t starting_sigset_;
private:
void SetThreadStackAndTls();
void ClearShadowForThreadStackAndTLS();
struct StackBounds {
uptr bottom;
uptr top;
};
StackBounds GetStackBounds() const;
bool AddrIsInStack(uptr addr);
thread_callback_t start_routine_;
void *arg_;
bool track_origins_;
StackBounds stack_;
uptr tls_begin_;
uptr tls_end_;
unsigned in_signal_handler_;
DFsanThreadLocalMallocStorage malloc_storage_;
};
DFsanThread *GetCurrentThread();
void SetCurrentThread(DFsanThread *t);
void DFsanTSDInit(void (*destructor)(void *tsd));
void DFsanTSDDtor(void *tsd);
} // namespace __dfsan
#endif // DFSAN_THREAD_H
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