172 lines
5.2 KiB
C++
172 lines
5.2 KiB
C++
//===-- tsan_platform.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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// Platform-specific code.
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//===----------------------------------------------------------------------===//
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/*
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C++ linux memory layout:
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0000 0000 0000 - 03c0 0000 0000: protected
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03c0 0000 0000 - 1000 0000 0000: shadow
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1000 0000 0000 - 6000 0000 0000: protected
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6000 0000 0000 - 6200 0000 0000: traces
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6200 0000 0000 - 7d00 0000 0000: -
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7d00 0000 0000 - 7e00 0000 0000: heap
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7e00 0000 0000 - 7fff ffff ffff: modules and main thread stack
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C++ COMPAT linux memory layout:
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0000 0000 0000 - 0400 0000 0000: protected
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0400 0000 0000 - 1000 0000 0000: shadow
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1000 0000 0000 - 2900 0000 0000: protected
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2900 0000 0000 - 2c00 0000 0000: modules
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2c00 0000 0000 - 6000 0000 0000: -
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6000 0000 0000 - 6200 0000 0000: traces
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6200 0000 0000 - 7d00 0000 0000: -
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7d00 0000 0000 - 7e00 0000 0000: heap
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7e00 0000 0000 - 7f00 0000 0000: -
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7f00 0000 0000 - 7fff ffff ffff: main thread stack
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Go linux and darwin memory layout:
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0000 0000 0000 - 0000 1000 0000: executable
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0000 1000 0000 - 00f8 0000 0000: -
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00c0 0000 0000 - 00e0 0000 0000: heap
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00e0 0000 0000 - 1000 0000 0000: -
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1000 0000 0000 - 1380 0000 0000: shadow
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1460 0000 0000 - 6000 0000 0000: -
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6000 0000 0000 - 6200 0000 0000: traces
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6200 0000 0000 - 7fff ffff ffff: -
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Go windows memory layout:
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0000 0000 0000 - 0000 1000 0000: executable
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0000 1000 0000 - 00f8 0000 0000: -
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00c0 0000 0000 - 00e0 0000 0000: heap
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00e0 0000 0000 - 0100 0000 0000: -
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0100 0000 0000 - 0560 0000 0000: shadow
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0560 0000 0000 - 0760 0000 0000: traces
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0760 0000 0000 - 07ff ffff ffff: -
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*/
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#ifndef TSAN_PLATFORM_H
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#define TSAN_PLATFORM_H
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#include "tsan_defs.h"
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#include "tsan_trace.h"
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#if defined(__LP64__) || defined(_WIN64)
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namespace __tsan {
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#if defined(TSAN_GO)
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static const uptr kLinuxAppMemBeg = 0x000000000000ULL;
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static const uptr kLinuxAppMemEnd = 0x04dfffffffffULL;
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# if SANITIZER_WINDOWS
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static const uptr kLinuxShadowMsk = 0x010000000000ULL;
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# else
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static const uptr kLinuxShadowMsk = 0x200000000000ULL;
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# endif
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// TSAN_COMPAT_SHADOW is intended for COMPAT virtual memory layout,
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// when memory addresses are of the 0x2axxxxxxxxxx form.
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// The option is enabled with 'setarch x86_64 -L'.
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#elif defined(TSAN_COMPAT_SHADOW) && TSAN_COMPAT_SHADOW
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static const uptr kLinuxAppMemBeg = 0x290000000000ULL;
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static const uptr kLinuxAppMemEnd = 0x7fffffffffffULL;
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#else
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static const uptr kLinuxAppMemBeg = 0x7cf000000000ULL;
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static const uptr kLinuxAppMemEnd = 0x7fffffffffffULL;
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#endif
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static const uptr kLinuxAppMemMsk = 0x7c0000000000ULL;
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#if SANITIZER_WINDOWS
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const uptr kTraceMemBegin = 0x056000000000ULL;
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#else
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const uptr kTraceMemBegin = 0x600000000000ULL;
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#endif
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const uptr kTraceMemSize = 0x020000000000ULL;
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// This has to be a macro to allow constant initialization of constants below.
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#ifndef TSAN_GO
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#define MemToShadow(addr) \
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(((addr) & ~(kLinuxAppMemMsk | (kShadowCell - 1))) * kShadowCnt)
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#else
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#define MemToShadow(addr) \
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((((addr) & ~(kShadowCell - 1)) * kShadowCnt) | kLinuxShadowMsk)
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#endif
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static const uptr kLinuxShadowBeg = MemToShadow(kLinuxAppMemBeg);
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static const uptr kLinuxShadowEnd =
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MemToShadow(kLinuxAppMemEnd) | 0xff;
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static inline bool IsAppMem(uptr mem) {
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return mem >= kLinuxAppMemBeg && mem <= kLinuxAppMemEnd;
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}
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static inline bool IsShadowMem(uptr mem) {
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return mem >= kLinuxShadowBeg && mem <= kLinuxShadowEnd;
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}
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static inline uptr ShadowToMem(uptr shadow) {
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CHECK(IsShadowMem(shadow));
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#ifdef TSAN_GO
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return (shadow & ~kLinuxShadowMsk) / kShadowCnt;
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#else
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return (shadow / kShadowCnt) | kLinuxAppMemMsk;
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#endif
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}
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// For COMPAT mapping returns an alternative address
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// that mapped to the same shadow address.
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// COMPAT mapping is not quite one-to-one.
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static inline uptr AlternativeAddress(uptr addr) {
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#if defined(TSAN_COMPAT_SHADOW) && TSAN_COMPAT_SHADOW
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return (addr & ~kLinuxAppMemMsk) | 0x280000000000ULL;
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#else
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return 0;
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#endif
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}
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void FlushShadowMemory();
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void WriteMemoryProfile(char *buf, uptr buf_size);
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uptr GetRSS();
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const char *InitializePlatform();
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void FinalizePlatform();
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// The additional page is to catch shadow stack overflow as paging fault.
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const uptr kTotalTraceSize = (kTraceSize * sizeof(Event) + sizeof(Trace) + 4096
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+ 4095) & ~4095;
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uptr ALWAYS_INLINE GetThreadTrace(int tid) {
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uptr p = kTraceMemBegin + (uptr)tid * kTotalTraceSize;
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DCHECK_LT(p, kTraceMemBegin + kTraceMemSize);
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return p;
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}
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uptr ALWAYS_INLINE GetThreadTraceHeader(int tid) {
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uptr p = kTraceMemBegin + (uptr)tid * kTotalTraceSize
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+ kTraceSize * sizeof(Event);
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DCHECK_LT(p, kTraceMemBegin + kTraceMemSize);
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return p;
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}
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void internal_start_thread(void(*func)(void*), void *arg);
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// Says whether the addr relates to a global var.
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// Guesses with high probability, may yield both false positives and negatives.
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bool IsGlobalVar(uptr addr);
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int ExtractResolvFDs(void *state, int *fds, int nfd);
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int ExtractRecvmsgFDs(void *msg, int *fds, int nfd);
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} // namespace __tsan
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#else // defined(__LP64__) || defined(_WIN64)
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# error "Only 64-bit is supported"
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#endif
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#endif // TSAN_PLATFORM_H
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