Removed platform-specific ifdefs from sanitizer_procmaps.h
Summary: Removed platform-specific ifdefs for linux, mac, freebsd and netbsd from sanitizer_procmaps.h Patch by Yicheng Wang <yichengfb@fb.com> Reviewers: kcc, kubamracek, alekseyshl, fjricci, vitalybuka Reviewed By: fjricci, vitalybuka Subscribers: vitalybuka, emaste, krytarowski, llvm-commits Differential Revision: https://reviews.llvm.org/D38098 llvm-svn: 313999
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parent
a1e7ecc734
commit
fbccb0a8d2
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@ -28,6 +28,19 @@ namespace __sanitizer {
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// the one in <dirent.h>, which is used by readdir().
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struct linux_dirent;
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struct ProcSelfMapsBuff {
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char *data;
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uptr mmaped_size;
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uptr len;
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};
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struct MemoryMappingLayoutData {
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ProcSelfMapsBuff proc_self_maps;
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const char *current;
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};
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void ReadProcMaps(ProcSelfMapsBuff *proc_maps);
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// Syscall wrappers.
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uptr internal_getdents(fd_t fd, struct linux_dirent *dirp, unsigned int count);
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uptr internal_sigaltstack(const void* ss, void* oss);
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@ -20,6 +20,17 @@
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namespace __sanitizer {
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struct MemoryMappingLayoutData {
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int current_image;
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u32 current_magic;
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u32 current_filetype;
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ModuleArch current_arch;
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u8 current_uuid[kModuleUUIDSize];
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int current_load_cmd_count;
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char *current_load_cmd_addr;
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bool current_instrumented;
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};
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enum MacosVersion {
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MACOS_VERSION_UNINITIALIZED = 0,
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MACOS_VERSION_UNKNOWN,
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@ -16,20 +16,12 @@
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#include "sanitizer_common.h"
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#include "sanitizer_internal_defs.h"
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#include "sanitizer_linux.h"
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#include "sanitizer_mac.h"
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#include "sanitizer_mutex.h"
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namespace __sanitizer {
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#if SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_NETBSD
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struct ProcSelfMapsBuff {
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char *data;
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uptr mmaped_size;
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uptr len;
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};
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// Reads process memory map in an OS-specific way.
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void ReadProcMaps(ProcSelfMapsBuff *proc_maps);
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#endif // SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_NETBSD
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// Memory protection masks.
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static const uptr kProtectionRead = 1;
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@ -87,25 +79,7 @@ class MemoryMappingLayout {
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// FIXME: Hide implementation details for different platforms in
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// platform-specific files.
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# if SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_NETBSD
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ProcSelfMapsBuff proc_self_maps_;
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const char *current_;
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// Static mappings cache.
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static ProcSelfMapsBuff cached_proc_self_maps_;
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static StaticSpinMutex cache_lock_; // protects cached_proc_self_maps_.
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# elif SANITIZER_MAC
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template <u32 kLCSegment, typename SegmentCommand>
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bool NextSegmentLoad(MemoryMappedSegment *segment);
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int current_image_;
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u32 current_magic_;
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u32 current_filetype_;
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ModuleArch current_arch_;
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u8 current_uuid_[kModuleUUIDSize];
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int current_load_cmd_count_;
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char *current_load_cmd_addr_;
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bool current_instrumented_;
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# endif
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MemoryMappingLayoutData data_;
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};
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typedef void (*fill_profile_f)(uptr start, uptr rss, bool file,
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@ -20,9 +20,8 @@
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namespace __sanitizer {
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// Linker initialized.
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ProcSelfMapsBuff MemoryMappingLayout::cached_proc_self_maps_;
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StaticSpinMutex MemoryMappingLayout::cache_lock_; // Linker initialized.
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static ProcSelfMapsBuff cached_proc_self_maps;
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static StaticSpinMutex cache_lock;
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static int TranslateDigit(char c) {
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if (c >= '0' && c <= '9')
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@ -71,14 +70,14 @@ void MemoryMappedSegment::AddAddressRanges(LoadedModule *module) {
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}
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MemoryMappingLayout::MemoryMappingLayout(bool cache_enabled) {
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ReadProcMaps(&proc_self_maps_);
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ReadProcMaps(&data_.proc_self_maps);
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if (cache_enabled) {
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if (proc_self_maps_.mmaped_size == 0) {
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if (data_.proc_self_maps.mmaped_size == 0) {
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LoadFromCache();
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CHECK_GT(proc_self_maps_.len, 0);
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CHECK_GT(data_.proc_self_maps.len, 0);
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}
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} else {
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CHECK_GT(proc_self_maps_.mmaped_size, 0);
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CHECK_GT(data_.proc_self_maps.mmaped_size, 0);
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}
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Reset();
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// FIXME: in the future we may want to cache the mappings on demand only.
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@ -89,24 +88,22 @@ MemoryMappingLayout::MemoryMappingLayout(bool cache_enabled) {
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MemoryMappingLayout::~MemoryMappingLayout() {
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// Only unmap the buffer if it is different from the cached one. Otherwise
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// it will be unmapped when the cache is refreshed.
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if (proc_self_maps_.data != cached_proc_self_maps_.data) {
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UnmapOrDie(proc_self_maps_.data, proc_self_maps_.mmaped_size);
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if (data_.proc_self_maps.data != cached_proc_self_maps.data) {
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UnmapOrDie(data_.proc_self_maps.data, data_.proc_self_maps.mmaped_size);
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}
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}
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void MemoryMappingLayout::Reset() {
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current_ = proc_self_maps_.data;
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}
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void MemoryMappingLayout::Reset() { data_.current = data_.proc_self_maps.data; }
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// static
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void MemoryMappingLayout::CacheMemoryMappings() {
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SpinMutexLock l(&cache_lock_);
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SpinMutexLock l(&cache_lock);
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// Don't invalidate the cache if the mappings are unavailable.
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ProcSelfMapsBuff old_proc_self_maps;
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old_proc_self_maps = cached_proc_self_maps_;
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ReadProcMaps(&cached_proc_self_maps_);
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if (cached_proc_self_maps_.mmaped_size == 0) {
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cached_proc_self_maps_ = old_proc_self_maps;
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old_proc_self_maps = cached_proc_self_maps;
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ReadProcMaps(&cached_proc_self_maps);
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if (cached_proc_self_maps.mmaped_size == 0) {
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cached_proc_self_maps = old_proc_self_maps;
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} else {
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if (old_proc_self_maps.mmaped_size) {
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UnmapOrDie(old_proc_self_maps.data,
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@ -116,9 +113,9 @@ void MemoryMappingLayout::CacheMemoryMappings() {
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}
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void MemoryMappingLayout::LoadFromCache() {
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SpinMutexLock l(&cache_lock_);
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if (cached_proc_self_maps_.data) {
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proc_self_maps_ = cached_proc_self_maps_;
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SpinMutexLock l(&cache_lock);
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if (cached_proc_self_maps.data) {
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data_.proc_self_maps = cached_proc_self_maps;
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}
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}
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@ -67,9 +67,9 @@ void ReadProcMaps(ProcSelfMapsBuff *proc_maps) {
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}
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bool MemoryMappingLayout::Next(MemoryMappedSegment *segment) {
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char *last = proc_self_maps_.data + proc_self_maps_.len;
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if (current_ >= last) return false;
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struct kinfo_vmentry *VmEntry = (struct kinfo_vmentry*)current_;
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char *last = data_.proc_self_maps.data + data_.proc_self_maps.len;
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if (data_.current >= last) return false;
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struct kinfo_vmentry *VmEntry = (struct kinfo_vmentry *)data_.current;
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segment->start = (uptr)VmEntry->kve_start;
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segment->end = (uptr)VmEntry->kve_end;
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@ -90,9 +90,9 @@ bool MemoryMappingLayout::Next(MemoryMappedSegment *segment) {
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}
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#if SANITIZER_FREEBSD
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current_ += VmEntry->kve_structsize;
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data_.current += VmEntry->kve_structsize;
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#else
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current_ += sizeof(*VmEntry);
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data_.current += sizeof(*VmEntry);
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#endif
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return true;
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@ -27,48 +27,48 @@ static bool IsOneOf(char c, char c1, char c2) {
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}
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bool MemoryMappingLayout::Next(MemoryMappedSegment *segment) {
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char *last = proc_self_maps_.data + proc_self_maps_.len;
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if (current_ >= last) return false;
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char *next_line = (char*)internal_memchr(current_, '\n', last - current_);
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char *last = data_.proc_self_maps.data + data_.proc_self_maps.len;
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if (data_.current >= last) return false;
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char *next_line =
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(char *)internal_memchr(data_.current, '\n', last - data_.current);
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if (next_line == 0)
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next_line = last;
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// Example: 08048000-08056000 r-xp 00000000 03:0c 64593 /foo/bar
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segment->start = ParseHex(¤t_);
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CHECK_EQ(*current_++, '-');
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segment->end = ParseHex(¤t_);
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CHECK_EQ(*current_++, ' ');
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CHECK(IsOneOf(*current_, '-', 'r'));
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segment->start = ParseHex(&data_.current);
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CHECK_EQ(*data_.current++, '-');
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segment->end = ParseHex(&data_.current);
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CHECK_EQ(*data_.current++, ' ');
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CHECK(IsOneOf(*data_.current, '-', 'r'));
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segment->protection = 0;
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if (*current_++ == 'r') segment->protection |= kProtectionRead;
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CHECK(IsOneOf(*current_, '-', 'w'));
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if (*current_++ == 'w') segment->protection |= kProtectionWrite;
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CHECK(IsOneOf(*current_, '-', 'x'));
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if (*current_++ == 'x') segment->protection |= kProtectionExecute;
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CHECK(IsOneOf(*current_, 's', 'p'));
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if (*current_++ == 's') segment->protection |= kProtectionShared;
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CHECK_EQ(*current_++, ' ');
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segment->offset = ParseHex(¤t_);
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CHECK_EQ(*current_++, ' ');
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ParseHex(¤t_);
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CHECK_EQ(*current_++, ':');
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ParseHex(¤t_);
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CHECK_EQ(*current_++, ' ');
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while (IsDecimal(*current_))
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current_++;
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if (*data_.current++ == 'r') segment->protection |= kProtectionRead;
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CHECK(IsOneOf(*data_.current, '-', 'w'));
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if (*data_.current++ == 'w') segment->protection |= kProtectionWrite;
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CHECK(IsOneOf(*data_.current, '-', 'x'));
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if (*data_.current++ == 'x') segment->protection |= kProtectionExecute;
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CHECK(IsOneOf(*data_.current, 's', 'p'));
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if (*data_.current++ == 's') segment->protection |= kProtectionShared;
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CHECK_EQ(*data_.current++, ' ');
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segment->offset = ParseHex(&data_.current);
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CHECK_EQ(*data_.current++, ' ');
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ParseHex(&data_.current);
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CHECK_EQ(*data_.current++, ':');
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ParseHex(&data_.current);
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CHECK_EQ(*data_.current++, ' ');
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while (IsDecimal(*data_.current)) data_.current++;
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// Qemu may lack the trailing space.
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// https://github.com/google/sanitizers/issues/160
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// CHECK_EQ(*current_++, ' ');
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// CHECK_EQ(*data_.current++, ' ');
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// Skip spaces.
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while (current_ < next_line && *current_ == ' ')
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current_++;
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while (data_.current < next_line && *data_.current == ' ') data_.current++;
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// Fill in the filename.
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if (segment->filename) {
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uptr len = Min((uptr)(next_line - current_), segment->filename_size - 1);
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internal_strncpy(segment->filename, current_, len);
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uptr len =
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Min((uptr)(next_line - data_.current), segment->filename_size - 1);
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internal_strncpy(segment->filename, data_.current, len);
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segment->filename[len] = 0;
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}
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current_ = next_line + 1;
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data_.current = next_line + 1;
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return true;
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}
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@ -108,13 +108,13 @@ void MemoryMappingLayout::Reset() {
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// _dyld_image_count is thread-unsafe. We need to register callbacks for
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// adding and removing images which will invalidate the MemoryMappingLayout
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// state.
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current_image_ = _dyld_image_count();
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current_load_cmd_count_ = -1;
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current_load_cmd_addr_ = 0;
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current_magic_ = 0;
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current_filetype_ = 0;
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current_arch_ = kModuleArchUnknown;
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internal_memset(current_uuid_, 0, kModuleUUIDSize);
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data_.current_image = _dyld_image_count();
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data_.current_load_cmd_count = -1;
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data_.current_load_cmd_addr = 0;
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data_.current_magic = 0;
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data_.current_filetype = 0;
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data_.current_arch = kModuleArchUnknown;
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internal_memset(data_.current_uuid, 0, kModuleUUIDSize);
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}
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// The dyld load address should be unchanged throughout process execution,
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@ -183,14 +183,14 @@ const mach_header *get_dyld_hdr() {
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// segment.
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// Note that the segment addresses are not necessarily sorted.
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template <u32 kLCSegment, typename SegmentCommand>
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bool MemoryMappingLayout::NextSegmentLoad(MemoryMappedSegment *segment) {
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const char *lc = current_load_cmd_addr_;
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current_load_cmd_addr_ += ((const load_command *)lc)->cmdsize;
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static bool NextSegmentLoad(MemoryMappedSegment *segment,
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MemoryMappedSegmentData *seg_data, MemoryMappingLayoutData &layout_data) {
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const char *lc = layout_data.current_load_cmd_addr;
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layout_data.current_load_cmd_addr += ((const load_command *)lc)->cmdsize;
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if (((const load_command *)lc)->cmd == kLCSegment) {
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const SegmentCommand* sc = (const SegmentCommand *)lc;
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uptr base_virt_addr, addr_mask;
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if (current_image_ == kDyldImageIdx) {
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if (layout_data.current_image == kDyldImageIdx) {
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base_virt_addr = (uptr)get_dyld_hdr();
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// vmaddr is masked with 0xfffff because on macOS versions < 10.12,
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// it contains an absolute address rather than an offset for dyld.
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@ -200,37 +200,40 @@ bool MemoryMappingLayout::NextSegmentLoad(MemoryMappedSegment *segment) {
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// and the mask will give just this offset.
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addr_mask = 0xfffff;
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} else {
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base_virt_addr = (uptr)_dyld_get_image_vmaddr_slide(current_image_);
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base_virt_addr =
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(uptr)_dyld_get_image_vmaddr_slide(layout_data.current_image);
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addr_mask = ~0;
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}
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segment->start = (sc->vmaddr & addr_mask) + base_virt_addr;
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segment->end = segment->start + sc->vmsize;
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// Most callers don't need section information, so only fill this struct
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// when required.
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if (segment->data_) {
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segment->data_->nsects = sc->nsects;
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segment->data_->current_load_cmd_addr =
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if (seg_data) {
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seg_data->nsects = sc->nsects;
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seg_data->current_load_cmd_addr =
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(char *)lc + sizeof(SegmentCommand);
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segment->data_->lc_type = kLCSegment;
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segment->data_->base_virt_addr = base_virt_addr;
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segment->data_->addr_mask = addr_mask;
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internal_strncpy(segment->data_->name, sc->segname,
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ARRAY_SIZE(segment->data_->name));
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seg_data->lc_type = kLCSegment;
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seg_data->base_virt_addr = base_virt_addr;
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seg_data->addr_mask = addr_mask;
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internal_strncpy(seg_data->name, sc->segname,
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ARRAY_SIZE(seg_data->name));
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}
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// Return the initial protection.
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segment->protection = sc->initprot;
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segment->offset =
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(current_filetype_ == /*MH_EXECUTE*/ 0x2) ? sc->vmaddr : sc->fileoff;
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segment->offset = (layout_data.current_filetype ==
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/*MH_EXECUTE*/ 0x2)
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? sc->vmaddr
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: sc->fileoff;
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if (segment->filename) {
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const char *src = (current_image_ == kDyldImageIdx)
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const char *src = (layout_data.current_image == kDyldImageIdx)
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? kDyldPath
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: _dyld_get_image_name(current_image_);
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: _dyld_get_image_name(layout_data.current_image);
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internal_strncpy(segment->filename, src, segment->filename_size);
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}
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segment->arch = current_arch_;
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internal_memcpy(segment->uuid, current_uuid_, kModuleUUIDSize);
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segment->arch = layout_data.current_arch;
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internal_memcpy(segment->uuid, layout_data.current_uuid, kModuleUUIDSize);
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return true;
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}
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return false;
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@ -292,50 +295,52 @@ static bool IsModuleInstrumented(const load_command *first_lc) {
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}
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bool MemoryMappingLayout::Next(MemoryMappedSegment *segment) {
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for (; current_image_ >= kDyldImageIdx; current_image_--) {
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const mach_header *hdr = (current_image_ == kDyldImageIdx)
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for (; data_.current_image >= kDyldImageIdx; data_.current_image--) {
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const mach_header *hdr = (data_.current_image == kDyldImageIdx)
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? get_dyld_hdr()
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: _dyld_get_image_header(current_image_);
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: _dyld_get_image_header(data_.current_image);
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if (!hdr) continue;
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if (current_load_cmd_count_ < 0) {
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if (data_.current_load_cmd_count < 0) {
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// Set up for this image;
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current_load_cmd_count_ = hdr->ncmds;
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current_magic_ = hdr->magic;
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current_filetype_ = hdr->filetype;
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current_arch_ = ModuleArchFromCpuType(hdr->cputype, hdr->cpusubtype);
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switch (current_magic_) {
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data_.current_load_cmd_count = hdr->ncmds;
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data_.current_magic = hdr->magic;
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data_.current_filetype = hdr->filetype;
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data_.current_arch = ModuleArchFromCpuType(hdr->cputype, hdr->cpusubtype);
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switch (data_.current_magic) {
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#ifdef MH_MAGIC_64
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case MH_MAGIC_64: {
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current_load_cmd_addr_ = (char*)hdr + sizeof(mach_header_64);
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data_.current_load_cmd_addr = (char *)hdr + sizeof(mach_header_64);
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break;
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}
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#endif
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case MH_MAGIC: {
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current_load_cmd_addr_ = (char*)hdr + sizeof(mach_header);
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data_.current_load_cmd_addr = (char *)hdr + sizeof(mach_header);
|
||||
break;
|
||||
}
|
||||
default: {
|
||||
continue;
|
||||
}
|
||||
}
|
||||
FindUUID((const load_command *)current_load_cmd_addr_, ¤t_uuid_[0]);
|
||||
current_instrumented_ =
|
||||
IsModuleInstrumented((const load_command *)current_load_cmd_addr_);
|
||||
FindUUID((const load_command *)data_.current_load_cmd_addr,
|
||||
data_.current_uuid);
|
||||
data_.current_instrumented = IsModuleInstrumented(
|
||||
(const load_command *)data_.current_load_cmd_addr);
|
||||
}
|
||||
|
||||
for (; current_load_cmd_count_ >= 0; current_load_cmd_count_--) {
|
||||
switch (current_magic_) {
|
||||
// current_magic_ may be only one of MH_MAGIC, MH_MAGIC_64.
|
||||
for (; data_.current_load_cmd_count >= 0; data_.current_load_cmd_count--) {
|
||||
switch (data_.current_magic) {
|
||||
// data_.current_magic may be only one of MH_MAGIC, MH_MAGIC_64.
|
||||
#ifdef MH_MAGIC_64
|
||||
case MH_MAGIC_64: {
|
||||
if (NextSegmentLoad<LC_SEGMENT_64, struct segment_command_64>(
|
||||
segment))
|
||||
segment, segment->data_, data_))
|
||||
return true;
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
case MH_MAGIC: {
|
||||
if (NextSegmentLoad<LC_SEGMENT, struct segment_command>(segment))
|
||||
if (NextSegmentLoad<LC_SEGMENT, struct segment_command>(
|
||||
segment, segment->data_, data_))
|
||||
return true;
|
||||
break;
|
||||
}
|
||||
|
@ -364,7 +369,7 @@ void MemoryMappingLayout::DumpListOfModules(
|
|||
modules->push_back(LoadedModule());
|
||||
cur_module = &modules->back();
|
||||
cur_module->set(segment.filename, segment.start, segment.arch,
|
||||
segment.uuid, current_instrumented_);
|
||||
segment.uuid, data_.current_instrumented);
|
||||
}
|
||||
segment.AddAddressRanges(cur_module);
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue