forked from OSchip/llvm-project
223 lines
7.9 KiB
C++
223 lines
7.9 KiB
C++
//===-- msan.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 MemorySanitizer.
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//
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// Private MSan header.
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//===----------------------------------------------------------------------===//
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#ifndef MSAN_H
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#define MSAN_H
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#include "sanitizer_common/sanitizer_flags.h"
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#include "sanitizer_common/sanitizer_internal_defs.h"
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#include "sanitizer_common/sanitizer_stacktrace.h"
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#include "msan_interface_internal.h"
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#include "msan_flags.h"
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#ifndef MSAN_REPLACE_OPERATORS_NEW_AND_DELETE
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# define MSAN_REPLACE_OPERATORS_NEW_AND_DELETE 1
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#endif
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/*
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C/C++ on FreeBSD
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0000 0000 0000 - 00ff ffff ffff: Low memory: main binary, MAP_32BIT mappings and modules
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0100 0000 0000 - 0fff ffff ffff: Bad1
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1000 0000 0000 - 30ff ffff ffff: Shadow
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3100 0000 0000 - 37ff ffff ffff: Bad2
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3800 0000 0000 - 58ff ffff ffff: Origins
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5900 0000 0000 - 5fff ffff ffff: Bad3
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6000 0000 0000 - 7fff ffff ffff: High memory: heap, modules and main thread stack
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C/C++ on Linux/PIE
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0000 0000 0000 - 1fff ffff ffff: Bad1
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2000 0000 0000 - 3fff ffff ffff: Shadow
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4000 0000 0000 - 5fff ffff ffff: Origins
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6000 0000 0000 - 7fff ffff ffff: Main memory
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C/C++ on Mips
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0000 0000 0000 - 009f ffff ffff: Bad1
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00a0 0000 0000 - 00bf ffff ffff: Shadow
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00c0 0000 0000 - 00df ffff ffff: Origins
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00e0 0000 0000 - 00ff ffff ffff: Main memory
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*/
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#if SANITIZER_LINUX && defined(__mips64)
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const uptr kLowMemBeg = 0;
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const uptr kLowMemSize = 0;
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const uptr kHighMemBeg = 0x00e000000000;
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const uptr kHighMemSize = 0x002000000000;
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const uptr kShadowBeg = 0x00a000000000;
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const uptr kShadowSize = 0x002000000000;
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const uptr kOriginsBeg = 0x00c000000000;
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# define MEM_TO_SHADOW(mem) (((uptr)(mem)) & ~0x4000000000ULL)
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#elif SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 64
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const uptr kLowMemBeg = 0x000000000000;
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const uptr kLowMemSize = 0x010000000000;
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const uptr kHighMemBeg = 0x600000000000;
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const uptr kHighMemSize = 0x200000000000;
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const uptr kShadowBeg = 0x100000000000;
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const uptr kShadowSize = 0x210000000000;
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const uptr kOriginsBeg = 0x380000000000;
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// Maps low and high app ranges to contiguous space with zero base:
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// Low: 0000 0000 0000 - 00ff ffff ffff -> 2000 0000 0000 - 20ff ffff ffff
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// High: 6000 0000 0000 - 7fff ffff ffff -> 0000 0000 0000 - 1fff ffff ffff
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# define LINEARIZE_MEM(mem) \
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(((uptr)(mem) & ~0xc00000000000ULL) ^ 0x200000000000ULL)
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# define MEM_TO_SHADOW(mem) (LINEARIZE_MEM((mem)) + 0x100000000000ULL)
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#elif SANITIZER_LINUX && SANITIZER_WORDSIZE == 64
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const uptr kLowMemBeg = 0;
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const uptr kLowMemSize = 0;
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const uptr kHighMemBeg = 0x600000000000;
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const uptr kHighMemSize = 0x200000000000;
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const uptr kShadowBeg = 0x200000000000;
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const uptr kShadowSize = 0x200000000000;
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const uptr kOriginsBeg = 0x400000000000;
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# define MEM_TO_SHADOW(mem) (((uptr)(mem)) & ~0x400000000000ULL)
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#else
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#error "Unsupported platform"
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#endif
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const uptr kBad1Beg = kLowMemBeg + kLowMemSize;
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const uptr kBad1Size = kShadowBeg - kBad1Beg;
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const uptr kBad2Beg = kShadowBeg + kShadowSize;
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const uptr kBad2Size = kOriginsBeg - kBad2Beg;
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const uptr kOriginsSize = kShadowSize;
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const uptr kBad3Beg = kOriginsBeg + kOriginsSize;
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const uptr kBad3Size = kHighMemBeg - kBad3Beg;
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#define SHADOW_TO_ORIGIN(shadow) \
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(((uptr)(shadow)) + (kOriginsBeg - kShadowBeg))
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#define MEM_TO_ORIGIN(mem) (SHADOW_TO_ORIGIN(MEM_TO_SHADOW((mem))))
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#define MEM_IS_APP(mem) \
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((kLowMemSize > 0 && (uptr)(mem) < kLowMemSize) || \
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(uptr)(mem) >= kHighMemBeg)
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#define MEM_IS_SHADOW(mem) \
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((uptr)(mem) >= kShadowBeg && (uptr)(mem) < kShadowBeg + kShadowSize)
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#define MEM_IS_ORIGIN(mem) \
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((uptr)(mem) >= kOriginsBeg && (uptr)(mem) < kOriginsBeg + kOriginsSize)
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// These constants must be kept in sync with the ones in MemorySanitizer.cc.
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const int kMsanParamTlsSize = 800;
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const int kMsanRetvalTlsSize = 800;
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namespace __msan {
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extern int msan_inited;
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extern bool msan_init_is_running;
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extern int msan_report_count;
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bool ProtectRange(uptr beg, uptr end);
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bool InitShadow(bool map_shadow, bool init_origins);
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char *GetProcSelfMaps();
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void InitializeInterceptors();
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void MsanAllocatorThreadFinish();
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void *MsanCalloc(StackTrace *stack, uptr nmemb, uptr size);
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void *MsanReallocate(StackTrace *stack, void *oldp, uptr size,
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uptr alignment, bool zeroise);
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void MsanDeallocate(StackTrace *stack, void *ptr);
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void InstallTrapHandler();
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void InstallAtExitHandler();
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void ReplaceOperatorsNewAndDelete();
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const char *GetStackOriginDescr(u32 id, uptr *pc);
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void EnterSymbolizer();
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void ExitSymbolizer();
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bool IsInSymbolizer();
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struct SymbolizerScope {
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SymbolizerScope() { EnterSymbolizer(); }
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~SymbolizerScope() { ExitSymbolizer(); }
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};
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void MsanDie();
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void PrintWarning(uptr pc, uptr bp);
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void PrintWarningWithOrigin(uptr pc, uptr bp, u32 origin);
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void GetStackTrace(BufferedStackTrace *stack, uptr max_s, uptr pc, uptr bp,
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bool request_fast_unwind);
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void ReportUMR(StackTrace *stack, u32 origin);
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void ReportExpectedUMRNotFound(StackTrace *stack);
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void ReportStats();
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void ReportAtExitStatistics();
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void DescribeMemoryRange(const void *x, uptr size);
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void ReportUMRInsideAddressRange(const char *what, const void *start, uptr size,
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uptr offset);
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// Unpoison first n function arguments.
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void UnpoisonParam(uptr n);
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void UnpoisonThreadLocalState();
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u32 GetOriginIfPoisoned(uptr a, uptr size);
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void SetOriginIfPoisoned(uptr addr, uptr src_shadow, uptr size, u32 src_origin);
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void CopyOrigin(void *dst, const void *src, uptr size, StackTrace *stack);
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void MovePoison(void *dst, const void *src, uptr size, StackTrace *stack);
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void CopyPoison(void *dst, const void *src, uptr size, StackTrace *stack);
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// Returns a "chained" origin id, pointing to the given stack trace followed by
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// the previous origin id.
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u32 ChainOrigin(u32 id, StackTrace *stack);
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#define GET_MALLOC_STACK_TRACE \
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BufferedStackTrace stack; \
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if (__msan_get_track_origins() && msan_inited) \
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GetStackTrace(&stack, common_flags()->malloc_context_size, \
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StackTrace::GetCurrentPc(), GET_CURRENT_FRAME(), \
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common_flags()->fast_unwind_on_malloc)
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#define GET_STORE_STACK_TRACE_PC_BP(pc, bp) \
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BufferedStackTrace stack; \
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if (__msan_get_track_origins() > 1 && msan_inited) \
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GetStackTrace(&stack, flags()->store_context_size, pc, bp, \
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common_flags()->fast_unwind_on_malloc)
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#define GET_FATAL_STACK_TRACE_PC_BP(pc, bp) \
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BufferedStackTrace stack; \
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if (msan_inited) \
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GetStackTrace(&stack, kStackTraceMax, pc, bp, \
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common_flags()->fast_unwind_on_fatal)
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#define GET_STORE_STACK_TRACE \
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GET_STORE_STACK_TRACE_PC_BP(StackTrace::GetCurrentPc(), GET_CURRENT_FRAME())
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class ScopedThreadLocalStateBackup {
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public:
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ScopedThreadLocalStateBackup() { Backup(); }
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~ScopedThreadLocalStateBackup() { Restore(); }
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void Backup();
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void Restore();
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private:
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u64 va_arg_overflow_size_tls;
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};
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extern void (*death_callback)(void);
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void MsanTSDInit(void (*destructor)(void *tsd));
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void *MsanTSDGet();
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void MsanTSDSet(void *tsd);
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void MsanTSDDtor(void *tsd);
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} // namespace __msan
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#define MSAN_MALLOC_HOOK(ptr, size) \
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if (&__sanitizer_malloc_hook) __sanitizer_malloc_hook(ptr, size)
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#define MSAN_FREE_HOOK(ptr) \
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if (&__sanitizer_free_hook) __sanitizer_free_hook(ptr)
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#endif // MSAN_H
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