270 lines
7.5 KiB
C++
270 lines
7.5 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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#ifndef TSAN_PLATFORM_H
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#define TSAN_PLATFORM_H
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#if !defined(__LP64__) && !defined(_WIN64)
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# error "Only 64-bit is supported"
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#endif
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#include "tsan_defs.h"
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#include "tsan_trace.h"
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namespace __tsan {
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#if !defined(TSAN_GO)
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/*
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C/C++ on linux and freebsd
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0000 0000 1000 - 0100 0000 0000: main binary and/or MAP_32BIT mappings
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0100 0000 0000 - 0200 0000 0000: -
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0200 0000 0000 - 1000 0000 0000: shadow
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1000 0000 0000 - 3000 0000 0000: -
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3000 0000 0000 - 4000 0000 0000: metainfo (memory blocks and sync objects)
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4000 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 - 7e80 0000 0000: -
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7e80 0000 0000 - 8000 0000 0000: modules and main thread stack
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*/
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const uptr kMetaShadowBeg = 0x300000000000ull;
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const uptr kMetaShadowEnd = 0x400000000000ull;
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const uptr kTraceMemBeg = 0x600000000000ull;
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const uptr kTraceMemEnd = 0x620000000000ull;
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const uptr kShadowBeg = 0x020000000000ull;
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const uptr kShadowEnd = 0x100000000000ull;
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const uptr kHeapMemBeg = 0x7d0000000000ull;
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const uptr kHeapMemEnd = 0x7e0000000000ull;
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const uptr kLoAppMemBeg = 0x000000001000ull;
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const uptr kLoAppMemEnd = 0x010000000000ull;
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const uptr kHiAppMemBeg = 0x7e8000000000ull;
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const uptr kHiAppMemEnd = 0x800000000000ull;
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const uptr kAppMemMsk = 0x7c0000000000ull;
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const uptr kAppMemXor = 0x020000000000ull;
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ALWAYS_INLINE
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bool IsAppMem(uptr mem) {
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return (mem >= kHeapMemBeg && mem < kHeapMemEnd) ||
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(mem >= kLoAppMemBeg && mem < kLoAppMemEnd) ||
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(mem >= kHiAppMemBeg && mem < kHiAppMemEnd);
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}
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ALWAYS_INLINE
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bool IsShadowMem(uptr mem) {
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return mem >= kShadowBeg && mem <= kShadowEnd;
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}
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ALWAYS_INLINE
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bool IsMetaMem(uptr mem) {
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return mem >= kMetaShadowBeg && mem <= kMetaShadowEnd;
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}
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ALWAYS_INLINE
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uptr MemToShadow(uptr x) {
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DCHECK(IsAppMem(x));
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return (((x) & ~(kAppMemMsk | (kShadowCell - 1)))
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^ kAppMemXor) * kShadowCnt;
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}
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ALWAYS_INLINE
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u32 *MemToMeta(uptr x) {
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DCHECK(IsAppMem(x));
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return (u32*)(((((x) & ~(kAppMemMsk | (kMetaShadowCell - 1)))
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^ kAppMemXor) / kMetaShadowCell * kMetaShadowSize) | kMetaShadowBeg);
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}
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ALWAYS_INLINE
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uptr ShadowToMem(uptr s) {
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CHECK(IsShadowMem(s));
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if (s >= MemToShadow(kLoAppMemBeg) && s <= MemToShadow(kLoAppMemEnd - 1))
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return (s / kShadowCnt) ^ kAppMemXor;
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else
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return ((s / kShadowCnt) ^ kAppMemXor) | kAppMemMsk;
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}
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static USED uptr UserRegions[] = {
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kLoAppMemBeg, kLoAppMemEnd,
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kHiAppMemBeg, kHiAppMemEnd,
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kHeapMemBeg, kHeapMemEnd,
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};
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#elif defined(TSAN_GO) && !SANITIZER_WINDOWS
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/* Go on linux, darwin and freebsd
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0000 0000 1000 - 0000 1000 0000: executable
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0000 1000 0000 - 00c0 0000 0000: -
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00c0 0000 0000 - 00e0 0000 0000: heap
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00e0 0000 0000 - 2000 0000 0000: -
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2000 0000 0000 - 2380 0000 0000: shadow
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2380 0000 0000 - 3000 0000 0000: -
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3000 0000 0000 - 4000 0000 0000: metainfo (memory blocks and sync objects)
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4000 0000 0000 - 6000 0000 0000: -
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6000 0000 0000 - 6200 0000 0000: traces
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6200 0000 0000 - 8000 0000 0000: -
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*/
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const uptr kMetaShadowBeg = 0x300000000000ull;
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const uptr kMetaShadowEnd = 0x400000000000ull;
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const uptr kTraceMemBeg = 0x600000000000ull;
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const uptr kTraceMemEnd = 0x620000000000ull;
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const uptr kShadowBeg = 0x200000000000ull;
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const uptr kShadowEnd = 0x238000000000ull;
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const uptr kAppMemBeg = 0x000000001000ull;
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const uptr kAppMemEnd = 0x00e000000000ull;
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ALWAYS_INLINE
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bool IsAppMem(uptr mem) {
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return mem >= kAppMemBeg && mem < kAppMemEnd;
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}
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ALWAYS_INLINE
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bool IsShadowMem(uptr mem) {
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return mem >= kShadowBeg && mem <= kShadowEnd;
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}
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ALWAYS_INLINE
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bool IsMetaMem(uptr mem) {
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return mem >= kMetaShadowBeg && mem <= kMetaShadowEnd;
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}
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ALWAYS_INLINE
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uptr MemToShadow(uptr x) {
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DCHECK(IsAppMem(x));
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return ((x & ~(kShadowCell - 1)) * kShadowCnt) | kShadowBeg;
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}
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ALWAYS_INLINE
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u32 *MemToMeta(uptr x) {
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DCHECK(IsAppMem(x));
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return (u32*)(((x & ~(kMetaShadowCell - 1)) / \
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kMetaShadowCell * kMetaShadowSize) | kMetaShadowBeg);
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}
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ALWAYS_INLINE
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uptr ShadowToMem(uptr s) {
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CHECK(IsShadowMem(s));
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return (s & ~kShadowBeg) / kShadowCnt;
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}
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static USED uptr UserRegions[] = {
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kAppMemBeg, kAppMemEnd,
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};
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#elif defined(TSAN_GO) && SANITIZER_WINDOWS
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/* Go on windows
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0000 0000 1000 - 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 - 0380 0000 0000: shadow
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0380 0000 0000 - 0560 0000 0000: -
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0560 0000 0000 - 0760 0000 0000: traces
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0760 0000 0000 - 07d0 0000 0000: metainfo (memory blocks and sync objects)
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07d0 0000 0000 - 8000 0000 0000: -
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*/
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const uptr kMetaShadowBeg = 0x076000000000ull;
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const uptr kMetaShadowEnd = 0x07d000000000ull;
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const uptr kTraceMemBeg = 0x056000000000ull;
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const uptr kTraceMemEnd = 0x076000000000ull;
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const uptr kShadowBeg = 0x010000000000ull;
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const uptr kShadowEnd = 0x038000000000ull;
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const uptr kAppMemBeg = 0x000000001000ull;
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const uptr kAppMemEnd = 0x00e000000000ull;
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ALWAYS_INLINE
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bool IsAppMem(uptr mem) {
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return mem >= kAppMemBeg && mem < kAppMemEnd;
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}
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ALWAYS_INLINE
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bool IsShadowMem(uptr mem) {
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return mem >= kShadowBeg && mem <= kShadowEnd;
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}
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ALWAYS_INLINE
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bool IsMetaMem(uptr mem) {
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return mem >= kMetaShadowBeg && mem <= kMetaShadowEnd;
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}
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ALWAYS_INLINE
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uptr MemToShadow(uptr x) {
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DCHECK(IsAppMem(x));
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return ((x & ~(kShadowCell - 1)) * kShadowCnt) | kShadowBeg;
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}
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ALWAYS_INLINE
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u32 *MemToMeta(uptr x) {
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DCHECK(IsAppMem(x));
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return (u32*)(((x & ~(kMetaShadowCell - 1)) / \
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kMetaShadowCell * kMetaShadowSize) | kMetaShadowEnd);
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}
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ALWAYS_INLINE
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uptr ShadowToMem(uptr s) {
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CHECK(IsShadowMem(s));
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// FIXME(dvyukov): this is most likely wrong as the mapping is not bijection.
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return (x & ~kShadowBeg) / kShadowCnt;
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}
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static USED uptr UserRegions[] = {
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kAppMemBeg, kAppMemEnd,
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};
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#else
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# error "Unknown platform"
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#endif
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// The additional page is to catch shadow stack overflow as paging fault.
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// Windows wants 64K alignment for mmaps.
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const uptr kTotalTraceSize = (kTraceSize * sizeof(Event) + sizeof(Trace)
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+ (64 << 10) + (64 << 10) - 1) & ~((64 << 10) - 1);
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uptr ALWAYS_INLINE GetThreadTrace(int tid) {
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uptr p = kTraceMemBeg + (uptr)tid * kTotalTraceSize;
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DCHECK_LT(p, kTraceMemEnd);
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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 = kTraceMemBeg + (uptr)tid * kTotalTraceSize
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+ kTraceSize * sizeof(Event);
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DCHECK_LT(p, kTraceMemEnd);
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return p;
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}
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void InitializePlatform();
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void FlushShadowMemory();
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void WriteMemoryProfile(char *buf, uptr buf_size, uptr nthread, uptr nlive);
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uptr GetRSS();
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void *internal_start_thread(void(*func)(void*), void *arg);
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void internal_join_thread(void *th);
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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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int call_pthread_cancel_with_cleanup(int(*fn)(void *c, void *m,
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void *abstime), void *c, void *m, void *abstime,
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void(*cleanup)(void *arg), void *arg);
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} // namespace __tsan
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#endif // TSAN_PLATFORM_H
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