187 lines
4.3 KiB
C++
187 lines
4.3 KiB
C++
//===-- tsan_defs.h ---------------------------------------------*- C++ -*-===//
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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 ThreadSanitizer (TSan), a race detector.
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//
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//===----------------------------------------------------------------------===//
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#ifndef TSAN_DEFS_H
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#define TSAN_DEFS_H
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#include "sanitizer_common/sanitizer_internal_defs.h"
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#include "sanitizer_common/sanitizer_libc.h"
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#include "tsan_stat.h"
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#ifndef TSAN_DEBUG
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#define TSAN_DEBUG 0
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#endif // TSAN_DEBUG
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namespace __tsan {
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#ifdef TSAN_GO
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const bool kGoMode = true;
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const bool kCppMode = false;
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const char *const kTsanOptionsEnv = "GORACE";
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// Go linker does not support weak symbols.
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#define CPP_WEAK
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#else
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const bool kGoMode = false;
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const bool kCppMode = true;
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const char *const kTsanOptionsEnv = "TSAN_OPTIONS";
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#define CPP_WEAK WEAK
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#endif
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const int kTidBits = 13;
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const unsigned kMaxTid = 1 << kTidBits;
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const unsigned kMaxTidInClock = kMaxTid * 2; // This includes msb 'freed' bit.
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const int kClkBits = 42;
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const unsigned kMaxTidReuse = (1 << (64 - kClkBits)) - 1;
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const uptr kShadowStackSize = 64 * 1024;
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#ifdef TSAN_SHADOW_COUNT
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# if TSAN_SHADOW_COUNT == 2 \
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|| TSAN_SHADOW_COUNT == 4 || TSAN_SHADOW_COUNT == 8
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const uptr kShadowCnt = TSAN_SHADOW_COUNT;
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# else
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# error "TSAN_SHADOW_COUNT must be one of 2,4,8"
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# endif
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#else
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// Count of shadow values in a shadow cell.
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#define TSAN_SHADOW_COUNT 4
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const uptr kShadowCnt = 4;
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#endif
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// That many user bytes are mapped onto a single shadow cell.
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const uptr kShadowCell = 8;
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// Size of a single shadow value (u64).
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const uptr kShadowSize = 8;
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// Shadow memory is kShadowMultiplier times larger than user memory.
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const uptr kShadowMultiplier = kShadowSize * kShadowCnt / kShadowCell;
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// That many user bytes are mapped onto a single meta shadow cell.
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// Must be less or equal to minimal memory allocator alignment.
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const uptr kMetaShadowCell = 8;
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// Size of a single meta shadow value (u32).
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const uptr kMetaShadowSize = 4;
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#if defined(TSAN_NO_HISTORY) && TSAN_NO_HISTORY
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const bool kCollectHistory = false;
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#else
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const bool kCollectHistory = true;
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#endif
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#if defined(TSAN_COLLECT_STATS) && TSAN_COLLECT_STATS
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const bool kCollectStats = true;
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#else
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const bool kCollectStats = false;
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#endif
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// The following "build consistency" machinery ensures that all source files
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// are built in the same configuration. Inconsistent builds lead to
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// hard to debug crashes.
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#if TSAN_DEBUG
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void build_consistency_debug();
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#else
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void build_consistency_release();
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#endif
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#if TSAN_COLLECT_STATS
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void build_consistency_stats();
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#else
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void build_consistency_nostats();
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#endif
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#if TSAN_SHADOW_COUNT == 1
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void build_consistency_shadow1();
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#elif TSAN_SHADOW_COUNT == 2
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void build_consistency_shadow2();
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#elif TSAN_SHADOW_COUNT == 4
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void build_consistency_shadow4();
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#else
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void build_consistency_shadow8();
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#endif
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static inline void USED build_consistency() {
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#if TSAN_DEBUG
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build_consistency_debug();
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#else
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build_consistency_release();
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#endif
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#if TSAN_COLLECT_STATS
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build_consistency_stats();
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#else
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build_consistency_nostats();
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#endif
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#if TSAN_SHADOW_COUNT == 1
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build_consistency_shadow1();
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#elif TSAN_SHADOW_COUNT == 2
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build_consistency_shadow2();
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#elif TSAN_SHADOW_COUNT == 4
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build_consistency_shadow4();
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#else
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build_consistency_shadow8();
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#endif
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}
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template<typename T>
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T min(T a, T b) {
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return a < b ? a : b;
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}
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template<typename T>
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T max(T a, T b) {
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return a > b ? a : b;
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}
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template<typename T>
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T RoundUp(T p, u64 align) {
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DCHECK_EQ(align & (align - 1), 0);
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return (T)(((u64)p + align - 1) & ~(align - 1));
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}
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template<typename T>
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T RoundDown(T p, u64 align) {
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DCHECK_EQ(align & (align - 1), 0);
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return (T)((u64)p & ~(align - 1));
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}
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// Zeroizes high part, returns 'bits' lsb bits.
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template<typename T>
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T GetLsb(T v, int bits) {
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return (T)((u64)v & ((1ull << bits) - 1));
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}
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struct MD5Hash {
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u64 hash[2];
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bool operator==(const MD5Hash &other) const;
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};
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MD5Hash md5_hash(const void *data, uptr size);
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struct ThreadState;
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class ThreadContext;
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struct Context;
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struct ReportStack;
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class ReportDesc;
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class RegionAlloc;
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// Descriptor of user's memory block.
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struct MBlock {
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u64 siz;
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u32 stk;
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u16 tid;
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};
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COMPILER_CHECK(sizeof(MBlock) == 16);
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} // namespace __tsan
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#endif // TSAN_DEFS_H
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