forked from OSchip/llvm-project
115 lines
3.4 KiB
C++
115 lines
3.4 KiB
C++
//===-- asan_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 AddressSanitizer, an address sanity checker.
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//
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// ASan-private header for asan_thread.cc.
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//===----------------------------------------------------------------------===//
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#ifndef ASAN_THREAD_H
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#define ASAN_THREAD_H
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#include "asan_allocator.h"
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#include "asan_internal.h"
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#include "asan_stack.h"
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#include "asan_stats.h"
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#include "sanitizer_common/sanitizer_libc.h"
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namespace __asan {
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const u32 kInvalidTid = 0xffffff; // Must fit into 24 bits.
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class AsanThread;
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// These objects are created for every thread and are never deleted,
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// so we can find them by tid even if the thread is long dead.
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class AsanThreadSummary {
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public:
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explicit AsanThreadSummary(LinkerInitialized) { } // for T0.
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void Init(u32 parent_tid, StackTrace *stack) {
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parent_tid_ = parent_tid;
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announced_ = false;
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tid_ = kInvalidTid;
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if (stack) {
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internal_memcpy(&stack_, stack, sizeof(*stack));
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}
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thread_ = 0;
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name_[0] = 0;
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}
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u32 tid() { return tid_; }
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void set_tid(u32 tid) { tid_ = tid; }
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u32 parent_tid() { return parent_tid_; }
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bool announced() { return announced_; }
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void set_announced(bool announced) { announced_ = announced; }
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StackTrace *stack() { return &stack_; }
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AsanThread *thread() { return thread_; }
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void set_thread(AsanThread *thread) { thread_ = thread; }
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static void TSDDtor(void *tsd);
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void set_name(const char *name) {
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internal_strncpy(name_, name, sizeof(name_) - 1);
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}
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const char *name() { return name_; }
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private:
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u32 tid_;
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u32 parent_tid_;
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bool announced_;
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StackTrace stack_;
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AsanThread *thread_;
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char name_[128];
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};
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// AsanThreadSummary objects are never freed, so we need many of them.
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COMPILER_CHECK(sizeof(AsanThreadSummary) <= 4094);
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// AsanThread are stored in TSD and destroyed when the thread dies.
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class AsanThread {
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public:
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explicit AsanThread(LinkerInitialized); // for T0.
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static AsanThread *Create(u32 parent_tid, thread_callback_t start_routine,
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void *arg, StackTrace *stack);
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void Destroy();
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void Init(); // Should be called from the thread itself.
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thread_return_t ThreadStart();
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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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u32 tid() { return summary_->tid(); }
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AsanThreadSummary *summary() { return summary_; }
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void set_summary(AsanThreadSummary *summary) { summary_ = summary; }
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const char *GetFrameNameByAddr(uptr addr, uptr *offset);
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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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FakeStack &fake_stack() { return fake_stack_; }
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AsanThreadLocalMallocStorage &malloc_storage() { return malloc_storage_; }
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AsanStats &stats() { return stats_; }
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private:
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void SetThreadStackTopAndBottom();
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void ClearShadowForThreadStack();
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AsanThreadSummary *summary_;
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thread_callback_t start_routine_;
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void *arg_;
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uptr stack_top_;
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uptr stack_bottom_;
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FakeStack fake_stack_;
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AsanThreadLocalMallocStorage malloc_storage_;
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AsanStats stats_;
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};
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} // namespace __asan
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#endif // ASAN_THREAD_H
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