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-rw-r--r--contrib/llvm-project/lldb/source/Expression/IRExecutionUnit.cpp1277
1 files changed, 1277 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Expression/IRExecutionUnit.cpp b/contrib/llvm-project/lldb/source/Expression/IRExecutionUnit.cpp
new file mode 100644
index 000000000000..25404ad313e1
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Expression/IRExecutionUnit.cpp
@@ -0,0 +1,1277 @@
+//===-- IRExecutionUnit.cpp -------------------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ExecutionEngine/ExecutionEngine.h"
+#include "llvm/ExecutionEngine/ObjectCache.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/raw_ostream.h"
+
+#include "lldb/Core/Debugger.h"
+#include "lldb/Core/Disassembler.h"
+#include "lldb/Core/Module.h"
+#include "lldb/Core/Section.h"
+#include "lldb/Expression/IRExecutionUnit.h"
+#include "lldb/Symbol/CompileUnit.h"
+#include "lldb/Symbol/SymbolContext.h"
+#include "lldb/Symbol/SymbolFile.h"
+#include "lldb/Symbol/SymbolVendor.h"
+#include "lldb/Target/ExecutionContext.h"
+#include "lldb/Target/LanguageRuntime.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Utility/DataBufferHeap.h"
+#include "lldb/Utility/DataExtractor.h"
+#include "lldb/Utility/LLDBAssert.h"
+#include "lldb/Utility/Log.h"
+
+#include "lldb/../../source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.h"
+#include "lldb/../../source/Plugins/ObjectFile/JIT/ObjectFileJIT.h"
+
+using namespace lldb_private;
+
+IRExecutionUnit::IRExecutionUnit(std::unique_ptr<llvm::LLVMContext> &context_up,
+ std::unique_ptr<llvm::Module> &module_up,
+ ConstString &name,
+ const lldb::TargetSP &target_sp,
+ const SymbolContext &sym_ctx,
+ std::vector<std::string> &cpu_features)
+ : IRMemoryMap(target_sp), m_context_up(context_up.release()),
+ m_module_up(module_up.release()), m_module(m_module_up.get()),
+ m_cpu_features(cpu_features), m_name(name), m_sym_ctx(sym_ctx),
+ m_did_jit(false), m_function_load_addr(LLDB_INVALID_ADDRESS),
+ m_function_end_load_addr(LLDB_INVALID_ADDRESS),
+ m_reported_allocations(false) {}
+
+lldb::addr_t IRExecutionUnit::WriteNow(const uint8_t *bytes, size_t size,
+ Status &error) {
+ const bool zero_memory = false;
+ lldb::addr_t allocation_process_addr =
+ Malloc(size, 8, lldb::ePermissionsWritable | lldb::ePermissionsReadable,
+ eAllocationPolicyMirror, zero_memory, error);
+
+ if (!error.Success())
+ return LLDB_INVALID_ADDRESS;
+
+ WriteMemory(allocation_process_addr, bytes, size, error);
+
+ if (!error.Success()) {
+ Status err;
+ Free(allocation_process_addr, err);
+
+ return LLDB_INVALID_ADDRESS;
+ }
+
+ if (Log *log =
+ lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)) {
+ DataBufferHeap my_buffer(size, 0);
+ Status err;
+ ReadMemory(my_buffer.GetBytes(), allocation_process_addr, size, err);
+
+ if (err.Success()) {
+ DataExtractor my_extractor(my_buffer.GetBytes(), my_buffer.GetByteSize(),
+ lldb::eByteOrderBig, 8);
+ my_extractor.PutToLog(log, 0, my_buffer.GetByteSize(),
+ allocation_process_addr, 16,
+ DataExtractor::TypeUInt8);
+ }
+ }
+
+ return allocation_process_addr;
+}
+
+void IRExecutionUnit::FreeNow(lldb::addr_t allocation) {
+ if (allocation == LLDB_INVALID_ADDRESS)
+ return;
+
+ Status err;
+
+ Free(allocation, err);
+}
+
+Status IRExecutionUnit::DisassembleFunction(Stream &stream,
+ lldb::ProcessSP &process_wp) {
+ Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
+
+ ExecutionContext exe_ctx(process_wp);
+
+ Status ret;
+
+ ret.Clear();
+
+ lldb::addr_t func_local_addr = LLDB_INVALID_ADDRESS;
+ lldb::addr_t func_remote_addr = LLDB_INVALID_ADDRESS;
+
+ for (JittedFunction &function : m_jitted_functions) {
+ if (function.m_name == m_name) {
+ func_local_addr = function.m_local_addr;
+ func_remote_addr = function.m_remote_addr;
+ }
+ }
+
+ if (func_local_addr == LLDB_INVALID_ADDRESS) {
+ ret.SetErrorToGenericError();
+ ret.SetErrorStringWithFormat("Couldn't find function %s for disassembly",
+ m_name.AsCString());
+ return ret;
+ }
+
+ if (log)
+ log->Printf("Found function, has local address 0x%" PRIx64
+ " and remote address 0x%" PRIx64,
+ (uint64_t)func_local_addr, (uint64_t)func_remote_addr);
+
+ std::pair<lldb::addr_t, lldb::addr_t> func_range;
+
+ func_range = GetRemoteRangeForLocal(func_local_addr);
+
+ if (func_range.first == 0 && func_range.second == 0) {
+ ret.SetErrorToGenericError();
+ ret.SetErrorStringWithFormat("Couldn't find code range for function %s",
+ m_name.AsCString());
+ return ret;
+ }
+
+ if (log)
+ log->Printf("Function's code range is [0x%" PRIx64 "+0x%" PRIx64 "]",
+ func_range.first, func_range.second);
+
+ Target *target = exe_ctx.GetTargetPtr();
+ if (!target) {
+ ret.SetErrorToGenericError();
+ ret.SetErrorString("Couldn't find the target");
+ return ret;
+ }
+
+ lldb::DataBufferSP buffer_sp(new DataBufferHeap(func_range.second, 0));
+
+ Process *process = exe_ctx.GetProcessPtr();
+ Status err;
+ process->ReadMemory(func_remote_addr, buffer_sp->GetBytes(),
+ buffer_sp->GetByteSize(), err);
+
+ if (!err.Success()) {
+ ret.SetErrorToGenericError();
+ ret.SetErrorStringWithFormat("Couldn't read from process: %s",
+ err.AsCString("unknown error"));
+ return ret;
+ }
+
+ ArchSpec arch(target->GetArchitecture());
+
+ const char *plugin_name = nullptr;
+ const char *flavor_string = nullptr;
+ lldb::DisassemblerSP disassembler_sp =
+ Disassembler::FindPlugin(arch, flavor_string, plugin_name);
+
+ if (!disassembler_sp) {
+ ret.SetErrorToGenericError();
+ ret.SetErrorStringWithFormat(
+ "Unable to find disassembler plug-in for %s architecture.",
+ arch.GetArchitectureName());
+ return ret;
+ }
+
+ if (!process) {
+ ret.SetErrorToGenericError();
+ ret.SetErrorString("Couldn't find the process");
+ return ret;
+ }
+
+ DataExtractor extractor(buffer_sp, process->GetByteOrder(),
+ target->GetArchitecture().GetAddressByteSize());
+
+ if (log) {
+ log->Printf("Function data has contents:");
+ extractor.PutToLog(log, 0, extractor.GetByteSize(), func_remote_addr, 16,
+ DataExtractor::TypeUInt8);
+ }
+
+ disassembler_sp->DecodeInstructions(Address(func_remote_addr), extractor, 0,
+ UINT32_MAX, false, false);
+
+ InstructionList &instruction_list = disassembler_sp->GetInstructionList();
+ instruction_list.Dump(&stream, true, true, &exe_ctx);
+ return ret;
+}
+
+static void ReportInlineAsmError(const llvm::SMDiagnostic &diagnostic,
+ void *Context, unsigned LocCookie) {
+ Status *err = static_cast<Status *>(Context);
+
+ if (err && err->Success()) {
+ err->SetErrorToGenericError();
+ err->SetErrorStringWithFormat("Inline assembly error: %s",
+ diagnostic.getMessage().str().c_str());
+ }
+}
+
+void IRExecutionUnit::ReportSymbolLookupError(ConstString name) {
+ m_failed_lookups.push_back(name);
+}
+
+void IRExecutionUnit::GetRunnableInfo(Status &error, lldb::addr_t &func_addr,
+ lldb::addr_t &func_end) {
+ lldb::ProcessSP process_sp(GetProcessWP().lock());
+
+ static std::recursive_mutex s_runnable_info_mutex;
+
+ func_addr = LLDB_INVALID_ADDRESS;
+ func_end = LLDB_INVALID_ADDRESS;
+
+ if (!process_sp) {
+ error.SetErrorToGenericError();
+ error.SetErrorString("Couldn't write the JIT compiled code into the "
+ "process because the process is invalid");
+ return;
+ }
+
+ if (m_did_jit) {
+ func_addr = m_function_load_addr;
+ func_end = m_function_end_load_addr;
+
+ return;
+ };
+
+ std::lock_guard<std::recursive_mutex> guard(s_runnable_info_mutex);
+
+ m_did_jit = true;
+
+ Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
+
+ std::string error_string;
+
+ if (log) {
+ std::string s;
+ llvm::raw_string_ostream oss(s);
+
+ m_module->print(oss, nullptr);
+
+ oss.flush();
+
+ log->Printf("Module being sent to JIT: \n%s", s.c_str());
+ }
+
+ m_module_up->getContext().setInlineAsmDiagnosticHandler(ReportInlineAsmError,
+ &error);
+
+ llvm::EngineBuilder builder(std::move(m_module_up));
+ llvm::Triple triple(m_module->getTargetTriple());
+
+ builder.setEngineKind(llvm::EngineKind::JIT)
+ .setErrorStr(&error_string)
+ .setRelocationModel(triple.isOSBinFormatMachO()
+ ? llvm::Reloc::PIC_
+ : llvm::Reloc::Static)
+ .setMCJITMemoryManager(
+ std::unique_ptr<MemoryManager>(new MemoryManager(*this)))
+ .setOptLevel(llvm::CodeGenOpt::Less);
+
+ llvm::StringRef mArch;
+ llvm::StringRef mCPU;
+ llvm::SmallVector<std::string, 0> mAttrs;
+
+ for (std::string &feature : m_cpu_features)
+ mAttrs.push_back(feature);
+
+ llvm::TargetMachine *target_machine =
+ builder.selectTarget(triple, mArch, mCPU, mAttrs);
+
+ m_execution_engine_up.reset(builder.create(target_machine));
+
+ if (!m_execution_engine_up) {
+ error.SetErrorToGenericError();
+ error.SetErrorStringWithFormat("Couldn't JIT the function: %s",
+ error_string.c_str());
+ return;
+ }
+
+ m_strip_underscore =
+ (m_execution_engine_up->getDataLayout().getGlobalPrefix() == '_');
+
+ class ObjectDumper : public llvm::ObjectCache {
+ public:
+ void notifyObjectCompiled(const llvm::Module *module,
+ llvm::MemoryBufferRef object) override {
+ int fd = 0;
+ llvm::SmallVector<char, 256> result_path;
+ std::string object_name_model =
+ "jit-object-" + module->getModuleIdentifier() + "-%%%.o";
+ (void)llvm::sys::fs::createUniqueFile(object_name_model, fd, result_path);
+ llvm::raw_fd_ostream fds(fd, true);
+ fds.write(object.getBufferStart(), object.getBufferSize());
+ }
+
+ std::unique_ptr<llvm::MemoryBuffer>
+ getObject(const llvm::Module *module) override {
+ // Return nothing - we're just abusing the object-cache mechanism to dump
+ // objects.
+ return nullptr;
+ }
+ };
+
+ if (process_sp->GetTarget().GetEnableSaveObjects()) {
+ m_object_cache_up = llvm::make_unique<ObjectDumper>();
+ m_execution_engine_up->setObjectCache(m_object_cache_up.get());
+ }
+
+ // Make sure we see all sections, including ones that don't have
+ // relocations...
+ m_execution_engine_up->setProcessAllSections(true);
+
+ m_execution_engine_up->DisableLazyCompilation();
+
+ for (llvm::Function &function : *m_module) {
+ if (function.isDeclaration() || function.hasPrivateLinkage())
+ continue;
+
+ const bool external =
+ function.hasExternalLinkage() || function.hasLinkOnceODRLinkage();
+
+ void *fun_ptr = m_execution_engine_up->getPointerToFunction(&function);
+
+ if (!error.Success()) {
+ // We got an error through our callback!
+ return;
+ }
+
+ if (!fun_ptr) {
+ error.SetErrorToGenericError();
+ error.SetErrorStringWithFormat(
+ "'%s' was in the JITted module but wasn't lowered",
+ function.getName().str().c_str());
+ return;
+ }
+ m_jitted_functions.push_back(JittedFunction(
+ function.getName().str().c_str(), external, (lldb::addr_t)fun_ptr));
+ }
+
+ CommitAllocations(process_sp);
+ ReportAllocations(*m_execution_engine_up);
+
+ // We have to do this after calling ReportAllocations because for the MCJIT,
+ // getGlobalValueAddress will cause the JIT to perform all relocations. That
+ // can only be done once, and has to happen after we do the remapping from
+ // local -> remote. That means we don't know the local address of the
+ // Variables, but we don't need that for anything, so that's okay.
+
+ std::function<void(llvm::GlobalValue &)> RegisterOneValue = [this](
+ llvm::GlobalValue &val) {
+ if (val.hasExternalLinkage() && !val.isDeclaration()) {
+ uint64_t var_ptr_addr =
+ m_execution_engine_up->getGlobalValueAddress(val.getName().str());
+
+ lldb::addr_t remote_addr = GetRemoteAddressForLocal(var_ptr_addr);
+
+ // This is a really unfortunae API that sometimes returns local addresses
+ // and sometimes returns remote addresses, based on whether the variable
+ // was relocated during ReportAllocations or not.
+
+ if (remote_addr == LLDB_INVALID_ADDRESS) {
+ remote_addr = var_ptr_addr;
+ }
+
+ if (var_ptr_addr != 0)
+ m_jitted_global_variables.push_back(JittedGlobalVariable(
+ val.getName().str().c_str(), LLDB_INVALID_ADDRESS, remote_addr));
+ }
+ };
+
+ for (llvm::GlobalVariable &global_var : m_module->getGlobalList()) {
+ RegisterOneValue(global_var);
+ }
+
+ for (llvm::GlobalAlias &global_alias : m_module->getAliasList()) {
+ RegisterOneValue(global_alias);
+ }
+
+ WriteData(process_sp);
+
+ if (m_failed_lookups.size()) {
+ StreamString ss;
+
+ ss.PutCString("Couldn't lookup symbols:\n");
+
+ bool emitNewLine = false;
+
+ for (ConstString failed_lookup : m_failed_lookups) {
+ if (emitNewLine)
+ ss.PutCString("\n");
+ emitNewLine = true;
+ ss.PutCString(" ");
+ ss.PutCString(Mangled(failed_lookup)
+ .GetDemangledName(lldb::eLanguageTypeObjC_plus_plus)
+ .AsCString());
+ }
+
+ m_failed_lookups.clear();
+
+ error.SetErrorString(ss.GetString());
+
+ return;
+ }
+
+ m_function_load_addr = LLDB_INVALID_ADDRESS;
+ m_function_end_load_addr = LLDB_INVALID_ADDRESS;
+
+ for (JittedFunction &jitted_function : m_jitted_functions) {
+ jitted_function.m_remote_addr =
+ GetRemoteAddressForLocal(jitted_function.m_local_addr);
+
+ if (!m_name.IsEmpty() && jitted_function.m_name == m_name) {
+ AddrRange func_range =
+ GetRemoteRangeForLocal(jitted_function.m_local_addr);
+ m_function_end_load_addr = func_range.first + func_range.second;
+ m_function_load_addr = jitted_function.m_remote_addr;
+ }
+ }
+
+ if (log) {
+ log->Printf("Code can be run in the target.");
+
+ StreamString disassembly_stream;
+
+ Status err = DisassembleFunction(disassembly_stream, process_sp);
+
+ if (!err.Success()) {
+ log->Printf("Couldn't disassemble function : %s",
+ err.AsCString("unknown error"));
+ } else {
+ log->Printf("Function disassembly:\n%s", disassembly_stream.GetData());
+ }
+
+ log->Printf("Sections: ");
+ for (AllocationRecord &record : m_records) {
+ if (record.m_process_address != LLDB_INVALID_ADDRESS) {
+ record.dump(log);
+
+ DataBufferHeap my_buffer(record.m_size, 0);
+ Status err;
+ ReadMemory(my_buffer.GetBytes(), record.m_process_address,
+ record.m_size, err);
+
+ if (err.Success()) {
+ DataExtractor my_extractor(my_buffer.GetBytes(),
+ my_buffer.GetByteSize(),
+ lldb::eByteOrderBig, 8);
+ my_extractor.PutToLog(log, 0, my_buffer.GetByteSize(),
+ record.m_process_address, 16,
+ DataExtractor::TypeUInt8);
+ }
+ } else {
+ record.dump(log);
+
+ DataExtractor my_extractor((const void *)record.m_host_address,
+ record.m_size, lldb::eByteOrderBig, 8);
+ my_extractor.PutToLog(log, 0, record.m_size, record.m_host_address, 16,
+ DataExtractor::TypeUInt8);
+ }
+ }
+ }
+
+ func_addr = m_function_load_addr;
+ func_end = m_function_end_load_addr;
+
+ return;
+}
+
+IRExecutionUnit::~IRExecutionUnit() {
+ m_module_up.reset();
+ m_execution_engine_up.reset();
+ m_context_up.reset();
+}
+
+IRExecutionUnit::MemoryManager::MemoryManager(IRExecutionUnit &parent)
+ : m_default_mm_up(new llvm::SectionMemoryManager()), m_parent(parent) {}
+
+IRExecutionUnit::MemoryManager::~MemoryManager() {}
+
+lldb::SectionType IRExecutionUnit::GetSectionTypeFromSectionName(
+ const llvm::StringRef &name, IRExecutionUnit::AllocationKind alloc_kind) {
+ lldb::SectionType sect_type = lldb::eSectionTypeCode;
+ switch (alloc_kind) {
+ case AllocationKind::Stub:
+ sect_type = lldb::eSectionTypeCode;
+ break;
+ case AllocationKind::Code:
+ sect_type = lldb::eSectionTypeCode;
+ break;
+ case AllocationKind::Data:
+ sect_type = lldb::eSectionTypeData;
+ break;
+ case AllocationKind::Global:
+ sect_type = lldb::eSectionTypeData;
+ break;
+ case AllocationKind::Bytes:
+ sect_type = lldb::eSectionTypeOther;
+ break;
+ }
+
+ if (!name.empty()) {
+ if (name.equals("__text") || name.equals(".text"))
+ sect_type = lldb::eSectionTypeCode;
+ else if (name.equals("__data") || name.equals(".data"))
+ sect_type = lldb::eSectionTypeCode;
+ else if (name.startswith("__debug_") || name.startswith(".debug_")) {
+ const uint32_t name_idx = name[0] == '_' ? 8 : 7;
+ llvm::StringRef dwarf_name(name.substr(name_idx));
+ switch (dwarf_name[0]) {
+ case 'a':
+ if (dwarf_name.equals("abbrev"))
+ sect_type = lldb::eSectionTypeDWARFDebugAbbrev;
+ else if (dwarf_name.equals("aranges"))
+ sect_type = lldb::eSectionTypeDWARFDebugAranges;
+ else if (dwarf_name.equals("addr"))
+ sect_type = lldb::eSectionTypeDWARFDebugAddr;
+ break;
+
+ case 'f':
+ if (dwarf_name.equals("frame"))
+ sect_type = lldb::eSectionTypeDWARFDebugFrame;
+ break;
+
+ case 'i':
+ if (dwarf_name.equals("info"))
+ sect_type = lldb::eSectionTypeDWARFDebugInfo;
+ break;
+
+ case 'l':
+ if (dwarf_name.equals("line"))
+ sect_type = lldb::eSectionTypeDWARFDebugLine;
+ else if (dwarf_name.equals("loc"))
+ sect_type = lldb::eSectionTypeDWARFDebugLoc;
+ else if (dwarf_name.equals("loclists"))
+ sect_type = lldb::eSectionTypeDWARFDebugLocLists;
+ break;
+
+ case 'm':
+ if (dwarf_name.equals("macinfo"))
+ sect_type = lldb::eSectionTypeDWARFDebugMacInfo;
+ break;
+
+ case 'p':
+ if (dwarf_name.equals("pubnames"))
+ sect_type = lldb::eSectionTypeDWARFDebugPubNames;
+ else if (dwarf_name.equals("pubtypes"))
+ sect_type = lldb::eSectionTypeDWARFDebugPubTypes;
+ break;
+
+ case 's':
+ if (dwarf_name.equals("str"))
+ sect_type = lldb::eSectionTypeDWARFDebugStr;
+ else if (dwarf_name.equals("str_offsets"))
+ sect_type = lldb::eSectionTypeDWARFDebugStrOffsets;
+ break;
+
+ case 'r':
+ if (dwarf_name.equals("ranges"))
+ sect_type = lldb::eSectionTypeDWARFDebugRanges;
+ break;
+
+ default:
+ break;
+ }
+ } else if (name.startswith("__apple_") || name.startswith(".apple_"))
+ sect_type = lldb::eSectionTypeInvalid;
+ else if (name.equals("__objc_imageinfo"))
+ sect_type = lldb::eSectionTypeOther;
+ }
+ return sect_type;
+}
+
+uint8_t *IRExecutionUnit::MemoryManager::allocateCodeSection(
+ uintptr_t Size, unsigned Alignment, unsigned SectionID,
+ llvm::StringRef SectionName) {
+ Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
+
+ uint8_t *return_value = m_default_mm_up->allocateCodeSection(
+ Size, Alignment, SectionID, SectionName);
+
+ m_parent.m_records.push_back(AllocationRecord(
+ (uintptr_t)return_value,
+ lldb::ePermissionsReadable | lldb::ePermissionsExecutable,
+ GetSectionTypeFromSectionName(SectionName, AllocationKind::Code), Size,
+ Alignment, SectionID, SectionName.str().c_str()));
+
+ if (log) {
+ log->Printf("IRExecutionUnit::allocateCodeSection(Size=0x%" PRIx64
+ ", Alignment=%u, SectionID=%u) = %p",
+ (uint64_t)Size, Alignment, SectionID, (void *)return_value);
+ }
+
+ if (m_parent.m_reported_allocations) {
+ Status err;
+ lldb::ProcessSP process_sp =
+ m_parent.GetBestExecutionContextScope()->CalculateProcess();
+
+ m_parent.CommitOneAllocation(process_sp, err, m_parent.m_records.back());
+ }
+
+ return return_value;
+}
+
+uint8_t *IRExecutionUnit::MemoryManager::allocateDataSection(
+ uintptr_t Size, unsigned Alignment, unsigned SectionID,
+ llvm::StringRef SectionName, bool IsReadOnly) {
+ Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
+
+ uint8_t *return_value = m_default_mm_up->allocateDataSection(
+ Size, Alignment, SectionID, SectionName, IsReadOnly);
+
+ uint32_t permissions = lldb::ePermissionsReadable;
+ if (!IsReadOnly)
+ permissions |= lldb::ePermissionsWritable;
+ m_parent.m_records.push_back(AllocationRecord(
+ (uintptr_t)return_value, permissions,
+ GetSectionTypeFromSectionName(SectionName, AllocationKind::Data), Size,
+ Alignment, SectionID, SectionName.str().c_str()));
+ if (log) {
+ log->Printf("IRExecutionUnit::allocateDataSection(Size=0x%" PRIx64
+ ", Alignment=%u, SectionID=%u) = %p",
+ (uint64_t)Size, Alignment, SectionID, (void *)return_value);
+ }
+
+ if (m_parent.m_reported_allocations) {
+ Status err;
+ lldb::ProcessSP process_sp =
+ m_parent.GetBestExecutionContextScope()->CalculateProcess();
+
+ m_parent.CommitOneAllocation(process_sp, err, m_parent.m_records.back());
+ }
+
+ return return_value;
+}
+
+static ConstString
+FindBestAlternateMangledName(ConstString demangled,
+ const lldb::LanguageType &lang_type,
+ const SymbolContext &sym_ctx) {
+ CPlusPlusLanguage::MethodName cpp_name(demangled);
+ std::string scope_qualified_name = cpp_name.GetScopeQualifiedName();
+
+ if (!scope_qualified_name.size())
+ return ConstString();
+
+ if (!sym_ctx.module_sp)
+ return ConstString();
+
+ SymbolVendor *sym_vendor = sym_ctx.module_sp->GetSymbolVendor();
+ if (!sym_vendor)
+ return ConstString();
+
+ lldb_private::SymbolFile *sym_file = sym_vendor->GetSymbolFile();
+ if (!sym_file)
+ return ConstString();
+
+ std::vector<ConstString> alternates;
+ sym_file->GetMangledNamesForFunction(scope_qualified_name, alternates);
+
+ std::vector<ConstString> param_and_qual_matches;
+ std::vector<ConstString> param_matches;
+ for (size_t i = 0; i < alternates.size(); i++) {
+ ConstString alternate_mangled_name = alternates[i];
+ Mangled mangled(alternate_mangled_name, true);
+ ConstString demangled = mangled.GetDemangledName(lang_type);
+
+ CPlusPlusLanguage::MethodName alternate_cpp_name(demangled);
+ if (!cpp_name.IsValid())
+ continue;
+
+ if (alternate_cpp_name.GetArguments() == cpp_name.GetArguments()) {
+ if (alternate_cpp_name.GetQualifiers() == cpp_name.GetQualifiers())
+ param_and_qual_matches.push_back(alternate_mangled_name);
+ else
+ param_matches.push_back(alternate_mangled_name);
+ }
+ }
+
+ if (param_and_qual_matches.size())
+ return param_and_qual_matches[0]; // It is assumed that there will be only
+ // one!
+ else if (param_matches.size())
+ return param_matches[0]; // Return one of them as a best match
+ else
+ return ConstString();
+}
+
+struct IRExecutionUnit::SearchSpec {
+ ConstString name;
+ lldb::FunctionNameType mask;
+
+ SearchSpec(ConstString n,
+ lldb::FunctionNameType m = lldb::eFunctionNameTypeFull)
+ : name(n), mask(m) {}
+};
+
+void IRExecutionUnit::CollectCandidateCNames(
+ std::vector<IRExecutionUnit::SearchSpec> &C_specs,
+ ConstString name) {
+ if (m_strip_underscore && name.AsCString()[0] == '_')
+ C_specs.insert(C_specs.begin(), ConstString(&name.AsCString()[1]));
+ C_specs.push_back(SearchSpec(name));
+}
+
+void IRExecutionUnit::CollectCandidateCPlusPlusNames(
+ std::vector<IRExecutionUnit::SearchSpec> &CPP_specs,
+ const std::vector<SearchSpec> &C_specs, const SymbolContext &sc) {
+ for (const SearchSpec &C_spec : C_specs) {
+ ConstString name = C_spec.name;
+
+ if (CPlusPlusLanguage::IsCPPMangledName(name.GetCString())) {
+ Mangled mangled(name, true);
+ ConstString demangled =
+ mangled.GetDemangledName(lldb::eLanguageTypeC_plus_plus);
+
+ if (demangled) {
+ ConstString best_alternate_mangled_name = FindBestAlternateMangledName(
+ demangled, lldb::eLanguageTypeC_plus_plus, sc);
+
+ if (best_alternate_mangled_name) {
+ CPP_specs.push_back(best_alternate_mangled_name);
+ }
+
+ CPP_specs.push_back(SearchSpec(demangled, lldb::eFunctionNameTypeFull));
+ }
+ }
+
+ std::set<ConstString> alternates;
+ CPlusPlusLanguage::FindAlternateFunctionManglings(name, alternates);
+ CPP_specs.insert(CPP_specs.end(), alternates.begin(), alternates.end());
+ }
+}
+
+void IRExecutionUnit::CollectFallbackNames(
+ std::vector<SearchSpec> &fallback_specs,
+ const std::vector<SearchSpec> &C_specs) {
+ // As a last-ditch fallback, try the base name for C++ names. It's terrible,
+ // but the DWARF doesn't always encode "extern C" correctly.
+
+ for (const SearchSpec &C_spec : C_specs) {
+ ConstString name = C_spec.name;
+
+ if (CPlusPlusLanguage::IsCPPMangledName(name.GetCString())) {
+ Mangled mangled_name(name);
+ ConstString demangled_name =
+ mangled_name.GetDemangledName(lldb::eLanguageTypeC_plus_plus);
+ if (!demangled_name.IsEmpty()) {
+ const char *demangled_cstr = demangled_name.AsCString();
+ const char *lparen_loc = strchr(demangled_cstr, '(');
+ if (lparen_loc) {
+ llvm::StringRef base_name(demangled_cstr,
+ lparen_loc - demangled_cstr);
+ fallback_specs.push_back(ConstString(base_name));
+ }
+ }
+ }
+ }
+}
+
+lldb::addr_t IRExecutionUnit::FindInSymbols(
+ const std::vector<IRExecutionUnit::SearchSpec> &specs,
+ const lldb_private::SymbolContext &sc,
+ bool &symbol_was_missing_weak) {
+ symbol_was_missing_weak = false;
+ Target *target = sc.target_sp.get();
+
+ if (!target) {
+ // we shouldn't be doing any symbol lookup at all without a target
+ return LLDB_INVALID_ADDRESS;
+ }
+
+ for (const SearchSpec &spec : specs) {
+ SymbolContextList sc_list;
+
+ lldb::addr_t best_internal_load_address = LLDB_INVALID_ADDRESS;
+
+ std::function<bool(lldb::addr_t &, SymbolContextList &,
+ const lldb_private::SymbolContext &)>
+ get_external_load_address = [&best_internal_load_address, target,
+ &symbol_was_missing_weak](
+ lldb::addr_t &load_address, SymbolContextList &sc_list,
+ const lldb_private::SymbolContext &sc) -> lldb::addr_t {
+ load_address = LLDB_INVALID_ADDRESS;
+
+ if (sc_list.GetSize() == 0)
+ return false;
+
+ // missing_weak_symbol will be true only if we found only weak undefined
+ // references to this symbol.
+ symbol_was_missing_weak = true;
+ for (auto candidate_sc : sc_list.SymbolContexts()) {
+ // Only symbols can be weak undefined:
+ if (!candidate_sc.symbol)
+ symbol_was_missing_weak = false;
+ else if (candidate_sc.symbol->GetType() != lldb::eSymbolTypeUndefined
+ || !candidate_sc.symbol->IsWeak())
+ symbol_was_missing_weak = false;
+
+ const bool is_external =
+ (candidate_sc.function) ||
+ (candidate_sc.symbol && candidate_sc.symbol->IsExternal());
+ if (candidate_sc.symbol) {
+ load_address = candidate_sc.symbol->ResolveCallableAddress(*target);
+
+ if (load_address == LLDB_INVALID_ADDRESS) {
+ if (target->GetProcessSP())
+ load_address =
+ candidate_sc.symbol->GetAddress().GetLoadAddress(target);
+ else
+ load_address = candidate_sc.symbol->GetAddress().GetFileAddress();
+ }
+ }
+
+ if (load_address == LLDB_INVALID_ADDRESS && candidate_sc.function) {
+ if (target->GetProcessSP())
+ load_address = candidate_sc.function->GetAddressRange()
+ .GetBaseAddress()
+ .GetLoadAddress(target);
+ else
+ load_address = candidate_sc.function->GetAddressRange()
+ .GetBaseAddress()
+ .GetFileAddress();
+ }
+
+ if (load_address != LLDB_INVALID_ADDRESS) {
+ if (is_external) {
+ return true;
+ } else if (best_internal_load_address == LLDB_INVALID_ADDRESS) {
+ best_internal_load_address = load_address;
+ load_address = LLDB_INVALID_ADDRESS;
+ }
+ }
+ }
+
+ // You test the address of a weak symbol against NULL to see if it is
+ // present. So we should return 0 for a missing weak symbol.
+ if (symbol_was_missing_weak) {
+ load_address = 0;
+ return true;
+ }
+
+ return false;
+ };
+
+ if (sc.module_sp) {
+ sc.module_sp->FindFunctions(spec.name, nullptr, spec.mask,
+ true, // include_symbols
+ false, // include_inlines
+ true, // append
+ sc_list);
+ }
+
+ lldb::addr_t load_address = LLDB_INVALID_ADDRESS;
+
+ if (get_external_load_address(load_address, sc_list, sc)) {
+ return load_address;
+ } else {
+ sc_list.Clear();
+ }
+
+ if (sc_list.GetSize() == 0 && sc.target_sp) {
+ sc.target_sp->GetImages().FindFunctions(spec.name, spec.mask,
+ true, // include_symbols
+ false, // include_inlines
+ true, // append
+ sc_list);
+ }
+
+ if (get_external_load_address(load_address, sc_list, sc)) {
+ return load_address;
+ } else {
+ sc_list.Clear();
+ }
+
+ if (sc_list.GetSize() == 0 && sc.target_sp) {
+ sc.target_sp->GetImages().FindSymbolsWithNameAndType(
+ spec.name, lldb::eSymbolTypeAny, sc_list);
+ }
+
+ if (get_external_load_address(load_address, sc_list, sc)) {
+ return load_address;
+ }
+ // if there are any searches we try after this, add an sc_list.Clear() in
+ // an "else" clause here
+
+ if (best_internal_load_address != LLDB_INVALID_ADDRESS) {
+ return best_internal_load_address;
+ }
+ }
+
+ return LLDB_INVALID_ADDRESS;
+}
+
+lldb::addr_t
+IRExecutionUnit::FindInRuntimes(const std::vector<SearchSpec> &specs,
+ const lldb_private::SymbolContext &sc) {
+ lldb::TargetSP target_sp = sc.target_sp;
+
+ if (!target_sp) {
+ return LLDB_INVALID_ADDRESS;
+ }
+
+ lldb::ProcessSP process_sp = sc.target_sp->GetProcessSP();
+
+ if (!process_sp) {
+ return LLDB_INVALID_ADDRESS;
+ }
+
+ for (const SearchSpec &spec : specs) {
+ for (LanguageRuntime *runtime : process_sp->GetLanguageRuntimes()) {
+ lldb::addr_t symbol_load_addr = runtime->LookupRuntimeSymbol(spec.name);
+
+ if (symbol_load_addr != LLDB_INVALID_ADDRESS)
+ return symbol_load_addr;
+ }
+ }
+
+ return LLDB_INVALID_ADDRESS;
+}
+
+lldb::addr_t IRExecutionUnit::FindInUserDefinedSymbols(
+ const std::vector<SearchSpec> &specs,
+ const lldb_private::SymbolContext &sc) {
+ lldb::TargetSP target_sp = sc.target_sp;
+
+ for (const SearchSpec &spec : specs) {
+ lldb::addr_t symbol_load_addr = target_sp->GetPersistentSymbol(spec.name);
+
+ if (symbol_load_addr != LLDB_INVALID_ADDRESS)
+ return symbol_load_addr;
+ }
+
+ return LLDB_INVALID_ADDRESS;
+}
+
+lldb::addr_t
+IRExecutionUnit::FindSymbol(lldb_private::ConstString name, bool &missing_weak) {
+ std::vector<SearchSpec> candidate_C_names;
+ std::vector<SearchSpec> candidate_CPlusPlus_names;
+
+ CollectCandidateCNames(candidate_C_names, name);
+
+ lldb::addr_t ret = FindInSymbols(candidate_C_names, m_sym_ctx, missing_weak);
+ if (ret != LLDB_INVALID_ADDRESS)
+ return ret;
+
+ // If we find the symbol in runtimes or user defined symbols it can't be
+ // a missing weak symbol.
+ missing_weak = false;
+ ret = FindInRuntimes(candidate_C_names, m_sym_ctx);
+ if (ret != LLDB_INVALID_ADDRESS)
+ return ret;
+
+ ret = FindInUserDefinedSymbols(candidate_C_names, m_sym_ctx);
+ if (ret != LLDB_INVALID_ADDRESS)
+ return ret;
+
+ CollectCandidateCPlusPlusNames(candidate_CPlusPlus_names, candidate_C_names,
+ m_sym_ctx);
+ ret = FindInSymbols(candidate_CPlusPlus_names, m_sym_ctx, missing_weak);
+ if (ret != LLDB_INVALID_ADDRESS)
+ return ret;
+
+ std::vector<SearchSpec> candidate_fallback_names;
+
+ CollectFallbackNames(candidate_fallback_names, candidate_C_names);
+ ret = FindInSymbols(candidate_fallback_names, m_sym_ctx, missing_weak);
+
+ return ret;
+}
+
+void IRExecutionUnit::GetStaticInitializers(
+ std::vector<lldb::addr_t> &static_initializers) {
+ if (llvm::GlobalVariable *global_ctors =
+ m_module->getNamedGlobal("llvm.global_ctors")) {
+ if (llvm::ConstantArray *ctor_array = llvm::dyn_cast<llvm::ConstantArray>(
+ global_ctors->getInitializer())) {
+ for (llvm::Use &ctor_use : ctor_array->operands()) {
+ if (llvm::ConstantStruct *ctor_struct =
+ llvm::dyn_cast<llvm::ConstantStruct>(ctor_use)) {
+ lldbassert(ctor_struct->getNumOperands() ==
+ 3); // this is standardized
+ if (llvm::Function *ctor_function =
+ llvm::dyn_cast<llvm::Function>(ctor_struct->getOperand(1))) {
+ ConstString ctor_function_name_cs(ctor_function->getName().str());
+
+ for (JittedFunction &jitted_function : m_jitted_functions) {
+ if (ctor_function_name_cs == jitted_function.m_name) {
+ if (jitted_function.m_remote_addr != LLDB_INVALID_ADDRESS) {
+ static_initializers.push_back(jitted_function.m_remote_addr);
+ }
+ break;
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+}
+
+llvm::JITSymbol
+IRExecutionUnit::MemoryManager::findSymbol(const std::string &Name) {
+ bool missing_weak = false;
+ uint64_t addr = GetSymbolAddressAndPresence(Name, missing_weak);
+ // This is a weak symbol:
+ if (missing_weak)
+ return llvm::JITSymbol(addr,
+ llvm::JITSymbolFlags::Exported | llvm::JITSymbolFlags::Weak);
+ else
+ return llvm::JITSymbol(addr, llvm::JITSymbolFlags::Exported);
+}
+
+uint64_t
+IRExecutionUnit::MemoryManager::getSymbolAddress(const std::string &Name) {
+ bool missing_weak = false;
+ return GetSymbolAddressAndPresence(Name, missing_weak);
+}
+
+uint64_t
+IRExecutionUnit::MemoryManager::GetSymbolAddressAndPresence(
+ const std::string &Name, bool &missing_weak) {
+ Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
+
+ ConstString name_cs(Name.c_str());
+
+ lldb::addr_t ret = m_parent.FindSymbol(name_cs, missing_weak);
+
+ if (ret == LLDB_INVALID_ADDRESS) {
+ if (log)
+ log->Printf(
+ "IRExecutionUnit::getSymbolAddress(Name=\"%s\") = <not found>",
+ Name.c_str());
+
+ m_parent.ReportSymbolLookupError(name_cs);
+ return 0;
+ } else {
+ if (log)
+ log->Printf("IRExecutionUnit::getSymbolAddress(Name=\"%s\") = %" PRIx64,
+ Name.c_str(), ret);
+ return ret;
+ }
+}
+
+void *IRExecutionUnit::MemoryManager::getPointerToNamedFunction(
+ const std::string &Name, bool AbortOnFailure) {
+ return (void *)getSymbolAddress(Name);
+}
+
+lldb::addr_t
+IRExecutionUnit::GetRemoteAddressForLocal(lldb::addr_t local_address) {
+ Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
+
+ for (AllocationRecord &record : m_records) {
+ if (local_address >= record.m_host_address &&
+ local_address < record.m_host_address + record.m_size) {
+ if (record.m_process_address == LLDB_INVALID_ADDRESS)
+ return LLDB_INVALID_ADDRESS;
+
+ lldb::addr_t ret =
+ record.m_process_address + (local_address - record.m_host_address);
+
+ if (log) {
+ log->Printf(
+ "IRExecutionUnit::GetRemoteAddressForLocal() found 0x%" PRIx64
+ " in [0x%" PRIx64 "..0x%" PRIx64 "], and returned 0x%" PRIx64
+ " from [0x%" PRIx64 "..0x%" PRIx64 "].",
+ local_address, (uint64_t)record.m_host_address,
+ (uint64_t)record.m_host_address + (uint64_t)record.m_size, ret,
+ record.m_process_address, record.m_process_address + record.m_size);
+ }
+
+ return ret;
+ }
+ }
+
+ return LLDB_INVALID_ADDRESS;
+}
+
+IRExecutionUnit::AddrRange
+IRExecutionUnit::GetRemoteRangeForLocal(lldb::addr_t local_address) {
+ for (AllocationRecord &record : m_records) {
+ if (local_address >= record.m_host_address &&
+ local_address < record.m_host_address + record.m_size) {
+ if (record.m_process_address == LLDB_INVALID_ADDRESS)
+ return AddrRange(0, 0);
+
+ return AddrRange(record.m_process_address, record.m_size);
+ }
+ }
+
+ return AddrRange(0, 0);
+}
+
+bool IRExecutionUnit::CommitOneAllocation(lldb::ProcessSP &process_sp,
+ Status &error,
+ AllocationRecord &record) {
+ if (record.m_process_address != LLDB_INVALID_ADDRESS) {
+ return true;
+ }
+
+ switch (record.m_sect_type) {
+ case lldb::eSectionTypeInvalid:
+ case lldb::eSectionTypeDWARFDebugAbbrev:
+ case lldb::eSectionTypeDWARFDebugAddr:
+ case lldb::eSectionTypeDWARFDebugAranges:
+ case lldb::eSectionTypeDWARFDebugCuIndex:
+ case lldb::eSectionTypeDWARFDebugFrame:
+ case lldb::eSectionTypeDWARFDebugInfo:
+ case lldb::eSectionTypeDWARFDebugLine:
+ case lldb::eSectionTypeDWARFDebugLoc:
+ case lldb::eSectionTypeDWARFDebugLocLists:
+ case lldb::eSectionTypeDWARFDebugMacInfo:
+ case lldb::eSectionTypeDWARFDebugPubNames:
+ case lldb::eSectionTypeDWARFDebugPubTypes:
+ case lldb::eSectionTypeDWARFDebugRanges:
+ case lldb::eSectionTypeDWARFDebugStr:
+ case lldb::eSectionTypeDWARFDebugStrOffsets:
+ case lldb::eSectionTypeDWARFAppleNames:
+ case lldb::eSectionTypeDWARFAppleTypes:
+ case lldb::eSectionTypeDWARFAppleNamespaces:
+ case lldb::eSectionTypeDWARFAppleObjC:
+ case lldb::eSectionTypeDWARFGNUDebugAltLink:
+ error.Clear();
+ break;
+ default:
+ const bool zero_memory = false;
+ record.m_process_address =
+ Malloc(record.m_size, record.m_alignment, record.m_permissions,
+ eAllocationPolicyProcessOnly, zero_memory, error);
+ break;
+ }
+
+ return error.Success();
+}
+
+bool IRExecutionUnit::CommitAllocations(lldb::ProcessSP &process_sp) {
+ bool ret = true;
+
+ lldb_private::Status err;
+
+ for (AllocationRecord &record : m_records) {
+ ret = CommitOneAllocation(process_sp, err, record);
+
+ if (!ret) {
+ break;
+ }
+ }
+
+ if (!ret) {
+ for (AllocationRecord &record : m_records) {
+ if (record.m_process_address != LLDB_INVALID_ADDRESS) {
+ Free(record.m_process_address, err);
+ record.m_process_address = LLDB_INVALID_ADDRESS;
+ }
+ }
+ }
+
+ return ret;
+}
+
+void IRExecutionUnit::ReportAllocations(llvm::ExecutionEngine &engine) {
+ m_reported_allocations = true;
+
+ for (AllocationRecord &record : m_records) {
+ if (record.m_process_address == LLDB_INVALID_ADDRESS)
+ continue;
+
+ if (record.m_section_id == eSectionIDInvalid)
+ continue;
+
+ engine.mapSectionAddress((void *)record.m_host_address,
+ record.m_process_address);
+ }
+
+ // Trigger re-application of relocations.
+ engine.finalizeObject();
+}
+
+bool IRExecutionUnit::WriteData(lldb::ProcessSP &process_sp) {
+ bool wrote_something = false;
+ for (AllocationRecord &record : m_records) {
+ if (record.m_process_address != LLDB_INVALID_ADDRESS) {
+ lldb_private::Status err;
+ WriteMemory(record.m_process_address, (uint8_t *)record.m_host_address,
+ record.m_size, err);
+ if (err.Success())
+ wrote_something = true;
+ }
+ }
+ return wrote_something;
+}
+
+void IRExecutionUnit::AllocationRecord::dump(Log *log) {
+ if (!log)
+ return;
+
+ log->Printf("[0x%llx+0x%llx]->0x%llx (alignment %d, section ID %d, name %s)",
+ (unsigned long long)m_host_address, (unsigned long long)m_size,
+ (unsigned long long)m_process_address, (unsigned)m_alignment,
+ (unsigned)m_section_id, m_name.c_str());
+}
+
+lldb::ByteOrder IRExecutionUnit::GetByteOrder() const {
+ ExecutionContext exe_ctx(GetBestExecutionContextScope());
+ return exe_ctx.GetByteOrder();
+}
+
+uint32_t IRExecutionUnit::GetAddressByteSize() const {
+ ExecutionContext exe_ctx(GetBestExecutionContextScope());
+ return exe_ctx.GetAddressByteSize();
+}
+
+void IRExecutionUnit::PopulateSymtab(lldb_private::ObjectFile *obj_file,
+ lldb_private::Symtab &symtab) {
+ // No symbols yet...
+}
+
+void IRExecutionUnit::PopulateSectionList(
+ lldb_private::ObjectFile *obj_file,
+ lldb_private::SectionList &section_list) {
+ for (AllocationRecord &record : m_records) {
+ if (record.m_size > 0) {
+ lldb::SectionSP section_sp(new lldb_private::Section(
+ obj_file->GetModule(), obj_file, record.m_section_id,
+ ConstString(record.m_name), record.m_sect_type,
+ record.m_process_address, record.m_size,
+ record.m_host_address, // file_offset (which is the host address for
+ // the data)
+ record.m_size, // file_size
+ 0,
+ record.m_permissions)); // flags
+ section_list.AddSection(section_sp);
+ }
+ }
+}
+
+ArchSpec IRExecutionUnit::GetArchitecture() {
+ ExecutionContext exe_ctx(GetBestExecutionContextScope());
+ if(Target *target = exe_ctx.GetTargetPtr())
+ return target->GetArchitecture();
+ return ArchSpec();
+}
+
+lldb::ModuleSP IRExecutionUnit::GetJITModule() {
+ ExecutionContext exe_ctx(GetBestExecutionContextScope());
+ Target *target = exe_ctx.GetTargetPtr();
+ if (!target)
+ return nullptr;
+
+ auto Delegate = std::static_pointer_cast<lldb_private::ObjectFileJITDelegate>(
+ shared_from_this());
+
+ lldb::ModuleSP jit_module_sp =
+ lldb_private::Module::CreateModuleFromObjectFile<ObjectFileJIT>(Delegate);
+ if (!jit_module_sp)
+ return nullptr;
+
+ bool changed = false;
+ jit_module_sp->SetLoadAddress(*target, 0, true, changed);
+ return jit_module_sp;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-09 04:34:46 +0000