forked from OSchip/llvm-project
115 lines
3.4 KiB
C++
115 lines
3.4 KiB
C++
//===-- hwasan_thread.h -----------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of HWAddressSanitizer.
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//
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//===----------------------------------------------------------------------===//
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#ifndef HWASAN_THREAD_H
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#define HWASAN_THREAD_H
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#include "hwasan_allocator.h"
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#include "sanitizer_common/sanitizer_common.h"
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#include "sanitizer_common/sanitizer_ring_buffer.h"
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namespace __hwasan {
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typedef __sanitizer::CompactRingBuffer<uptr> StackAllocationsRingBuffer;
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class Thread {
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public:
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void Init(uptr stack_buffer_start, uptr stack_buffer_size); // Must be called from the thread itself.
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void Destroy();
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uptr stack_top() { return stack_top_; }
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uptr stack_bottom() { return stack_bottom_; }
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uptr stack_size() { return stack_top() - stack_bottom(); }
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uptr tls_begin() { return tls_begin_; }
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uptr tls_end() { return tls_end_; }
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bool IsMainThread() { return unique_id_ == 0; }
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bool AddrIsInStack(uptr addr) {
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return addr >= stack_bottom_ && addr < stack_top_;
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}
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bool InSignalHandler() { return in_signal_handler_; }
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void EnterSignalHandler() { in_signal_handler_++; }
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void LeaveSignalHandler() { in_signal_handler_--; }
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bool InSymbolizer() { return in_symbolizer_; }
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void EnterSymbolizer() { in_symbolizer_++; }
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void LeaveSymbolizer() { in_symbolizer_--; }
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bool InInterceptorScope() { return in_interceptor_scope_; }
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void EnterInterceptorScope() { in_interceptor_scope_++; }
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void LeaveInterceptorScope() { in_interceptor_scope_--; }
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AllocatorCache *allocator_cache() { return &allocator_cache_; }
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HeapAllocationsRingBuffer *heap_allocations() { return heap_allocations_; }
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StackAllocationsRingBuffer *stack_allocations() { return stack_allocations_; }
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tag_t GenerateRandomTag();
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void DisableTagging() { tagging_disabled_++; }
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void EnableTagging() { tagging_disabled_--; }
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bool TaggingIsDisabled() const { return tagging_disabled_; }
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u64 unique_id() const { return unique_id_; }
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void Announce() {
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if (announced_) return;
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announced_ = true;
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Print("Thread: ");
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}
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private:
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// NOTE: There is no Thread constructor. It is allocated
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// via mmap() and *must* be valid in zero-initialized state.
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void ClearShadowForThreadStackAndTLS();
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void Print(const char *prefix);
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uptr stack_top_;
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uptr stack_bottom_;
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uptr tls_begin_;
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uptr tls_end_;
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unsigned in_signal_handler_;
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unsigned in_symbolizer_;
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unsigned in_interceptor_scope_;
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u32 random_state_;
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u32 random_buffer_;
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AllocatorCache allocator_cache_;
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HeapAllocationsRingBuffer *heap_allocations_;
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StackAllocationsRingBuffer *stack_allocations_;
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static void InsertIntoThreadList(Thread *t);
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static void RemoveFromThreadList(Thread *t);
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Thread *next_; // All live threads form a linked list.
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u64 unique_id_; // counting from zero.
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u32 tagging_disabled_; // if non-zero, malloc uses zero tag in this thread.
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bool announced_;
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friend struct ThreadListHead;
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};
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Thread *GetCurrentThread();
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uptr *GetCurrentThreadLongPtr();
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struct ScopedTaggingDisabler {
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ScopedTaggingDisabler() { GetCurrentThread()->DisableTagging(); }
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~ScopedTaggingDisabler() { GetCurrentThread()->EnableTagging(); }
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};
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} // namespace __hwasan
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#endif // HWASAN_THREAD_H
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