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| //===-- sanitizer_procmaps.h ------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is shared between AddressSanitizer and ThreadSanitizer.
//
// Information about the process mappings.
//===----------------------------------------------------------------------===//
#ifndef SANITIZER_PROCMAPS_H
#define SANITIZER_PROCMAPS_H
#include "sanitizer_platform.h"
#if SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD || \
SANITIZER_OPENBSD || SANITIZER_MAC || SANITIZER_SOLARIS
#include "sanitizer_common.h"
#include "sanitizer_internal_defs.h"
#include "sanitizer_linux.h"
#include "sanitizer_mac.h"
#include "sanitizer_mutex.h"
namespace __sanitizer {
// Memory protection masks.
static const uptr kProtectionRead = 1;
static const uptr kProtectionWrite = 2;
static const uptr kProtectionExecute = 4;
static const uptr kProtectionShared = 8;
struct MemoryMappedSegmentData;
class MemoryMappedSegment {
public:
explicit MemoryMappedSegment(char *buff = nullptr, uptr size = 0)
: filename(buff), filename_size(size), data_(nullptr) {}
~MemoryMappedSegment() {}
bool IsReadable() const { return protection & kProtectionRead; }
bool IsWritable() const { return protection & kProtectionWrite; }
bool IsExecutable() const { return protection & kProtectionExecute; }
bool IsShared() const { return protection & kProtectionShared; }
void AddAddressRanges(LoadedModule *module);
uptr start;
uptr end;
uptr offset;
char *filename; // owned by caller
uptr filename_size;
uptr protection;
ModuleArch arch;
u8 uuid[kModuleUUIDSize];
private:
friend class MemoryMappingLayout;
// This field is assigned and owned by MemoryMappingLayout if needed
MemoryMappedSegmentData *data_;
};
class MemoryMappingLayout {
public:
explicit MemoryMappingLayout(bool cache_enabled);
~MemoryMappingLayout();
bool Next(MemoryMappedSegment *segment);
bool Error() const;
void Reset();
// In some cases, e.g. when running under a sandbox on Linux, ASan is unable
// to obtain the memory mappings. It should fall back to pre-cached data
// instead of aborting.
static void CacheMemoryMappings();
// Adds all mapped objects into a vector.
void DumpListOfModules(InternalMmapVectorNoCtor<LoadedModule> *modules);
private:
void LoadFromCache();
MemoryMappingLayoutData data_;
};
// Returns code range for the specified module.
bool GetCodeRangeForFile(const char *module, uptr *start, uptr *end);
bool IsDecimal(char c);
uptr ParseDecimal(const char **p);
bool IsHex(char c);
uptr ParseHex(const char **p);
} // namespace __sanitizer
#endif
#endif // SANITIZER_PROCMAPS_H
|