forked from OSchip/llvm-project
Reorder the operations in
DynamicLoaderDarwinKernel::KextImageInfo::LoadImageUsingMemoryModule a bit so that we only read the binaries out of memory once we've determined that we can find a real binary on the local system. Previously, lldb would read all of the kext binaries out of memory and then determine if it had the local copy. The kext table gives us most the information we need (address, name, uuid) so lldb only needs the actual in-memory load commands when it comes time to set the section load addresses. Delay reading until that point for all the kexts. NFC; doing the operations in a different order. <rdar://problem/41181173> llvm-svn: 356108
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85ace6269f
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97866d74db
lldb/source/Plugins/DynamicLoader/Darwin-Kernel
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@ -766,9 +766,10 @@ bool DynamicLoaderDarwinKernel::KextImageInfo::LoadImageUsingMemoryModule(
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Target &target = process->GetTarget();
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// If we don't have / can't create a memory module for this kext, don't try
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// to load it - we won't have the correct segment load addresses.
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if (!ReadMemoryModule(process)) {
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// kexts will have a uuid from the table.
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// for the kernel, we'll need to read the load commands out of memory to get it.
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if (m_uuid.IsValid() == false) {
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if (ReadMemoryModule(process) == false) {
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Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_DYNAMIC_LOADER));
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if (log)
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log->Printf("Unable to read '%s' from memory at address 0x%" PRIx64
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@ -776,14 +777,13 @@ bool DynamicLoaderDarwinKernel::KextImageInfo::LoadImageUsingMemoryModule(
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m_name.c_str(), m_load_address);
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return false;
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}
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}
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bool uuid_is_valid = m_uuid.IsValid();
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if (IsKernel() && uuid_is_valid && m_memory_module_sp.get()) {
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if (IsKernel() && m_uuid.IsValid()) {
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Stream *s = target.GetDebugger().GetOutputFile().get();
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if (s) {
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s->Printf("Kernel UUID: %s\n",
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m_memory_module_sp->GetUUID().GetAsString().c_str());
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m_uuid.GetAsString().c_str());
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s->Printf("Load Address: 0x%" PRIx64 "\n", m_load_address);
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}
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}
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@ -795,7 +795,7 @@ bool DynamicLoaderDarwinKernel::KextImageInfo::LoadImageUsingMemoryModule(
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m_module_sp = target_images.FindModule(m_uuid);
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// Search for the kext on the local filesystem via the UUID
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if (!m_module_sp && uuid_is_valid) {
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if (!m_module_sp && m_uuid.IsValid()) {
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ModuleSpec module_spec;
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module_spec.GetUUID() = m_uuid;
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module_spec.GetArchitecture() = target.GetArchitecture();
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@ -857,13 +857,7 @@ bool DynamicLoaderDarwinKernel::KextImageInfo::LoadImageUsingMemoryModule(
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// images. If we also have a memory module, require that they have matching
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// UUIDs
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if (m_module_sp) {
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bool uuid_match_ok = true;
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if (m_memory_module_sp) {
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if (m_module_sp->GetUUID() != m_memory_module_sp->GetUUID()) {
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uuid_match_ok = false;
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}
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}
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if (uuid_match_ok) {
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if (m_uuid.IsValid() && m_module_sp->GetUUID() == m_uuid) {
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target.GetImages().AppendIfNeeded(m_module_sp);
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if (IsKernel() &&
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target.GetExecutableModulePointer() != m_module_sp.get()) {
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@ -873,6 +867,11 @@ bool DynamicLoaderDarwinKernel::KextImageInfo::LoadImageUsingMemoryModule(
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}
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}
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// If we've found a binary, read the load commands out of memory so we
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// can set the segment load addresses.
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if (m_module_sp)
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ReadMemoryModule (process);
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static ConstString g_section_name_LINKEDIT("__LINKEDIT");
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if (m_memory_module_sp && m_module_sp) {
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