1266 lines
41 KiB
C++
1266 lines
41 KiB
C++
//===-- IRExecutionUnit.cpp -------------------------------------*- 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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#include "llvm/ExecutionEngine/ExecutionEngine.h"
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#include "llvm/ExecutionEngine/ObjectCache.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Support/SourceMgr.h"
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#include "llvm/Support/raw_ostream.h"
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#include "lldb/Core/Debugger.h"
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#include "lldb/Core/Disassembler.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/Section.h"
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#include "lldb/Expression/IRExecutionUnit.h"
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#include "lldb/Symbol/CompileUnit.h"
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#include "lldb/Symbol/SymbolContext.h"
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#include "lldb/Symbol/SymbolFile.h"
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#include "lldb/Symbol/SymbolVendor.h"
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#include "lldb/Target/ExecutionContext.h"
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#include "lldb/Target/ObjCLanguageRuntime.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Utility/DataBufferHeap.h"
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#include "lldb/Utility/DataExtractor.h"
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#include "lldb/Utility/LLDBAssert.h"
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#include "lldb/Utility/Log.h"
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#include "lldb/../../source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.h"
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using namespace lldb_private;
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IRExecutionUnit::IRExecutionUnit(std::unique_ptr<llvm::LLVMContext> &context_ap,
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std::unique_ptr<llvm::Module> &module_ap,
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ConstString &name,
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const lldb::TargetSP &target_sp,
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const SymbolContext &sym_ctx,
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std::vector<std::string> &cpu_features)
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: IRMemoryMap(target_sp), m_context_ap(context_ap.release()),
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m_module_ap(module_ap.release()), m_module(m_module_ap.get()),
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m_cpu_features(cpu_features), m_name(name), m_sym_ctx(sym_ctx),
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m_did_jit(false), m_function_load_addr(LLDB_INVALID_ADDRESS),
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m_function_end_load_addr(LLDB_INVALID_ADDRESS),
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m_reported_allocations(false) {}
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lldb::addr_t IRExecutionUnit::WriteNow(const uint8_t *bytes, size_t size,
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Status &error) {
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const bool zero_memory = false;
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lldb::addr_t allocation_process_addr =
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Malloc(size, 8, lldb::ePermissionsWritable | lldb::ePermissionsReadable,
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eAllocationPolicyMirror, zero_memory, error);
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if (!error.Success())
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return LLDB_INVALID_ADDRESS;
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WriteMemory(allocation_process_addr, bytes, size, error);
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if (!error.Success()) {
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Status err;
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Free(allocation_process_addr, err);
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return LLDB_INVALID_ADDRESS;
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}
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if (Log *log =
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lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)) {
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DataBufferHeap my_buffer(size, 0);
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Status err;
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ReadMemory(my_buffer.GetBytes(), allocation_process_addr, size, err);
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if (err.Success()) {
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DataExtractor my_extractor(my_buffer.GetBytes(), my_buffer.GetByteSize(),
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lldb::eByteOrderBig, 8);
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my_extractor.PutToLog(log, 0, my_buffer.GetByteSize(),
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allocation_process_addr, 16,
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DataExtractor::TypeUInt8);
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}
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}
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return allocation_process_addr;
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}
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void IRExecutionUnit::FreeNow(lldb::addr_t allocation) {
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if (allocation == LLDB_INVALID_ADDRESS)
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return;
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Status err;
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Free(allocation, err);
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}
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Status IRExecutionUnit::DisassembleFunction(Stream &stream,
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lldb::ProcessSP &process_wp) {
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Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
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ExecutionContext exe_ctx(process_wp);
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Status ret;
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ret.Clear();
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lldb::addr_t func_local_addr = LLDB_INVALID_ADDRESS;
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lldb::addr_t func_remote_addr = LLDB_INVALID_ADDRESS;
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for (JittedFunction &function : m_jitted_functions) {
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if (function.m_name == m_name) {
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func_local_addr = function.m_local_addr;
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func_remote_addr = function.m_remote_addr;
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}
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}
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if (func_local_addr == LLDB_INVALID_ADDRESS) {
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ret.SetErrorToGenericError();
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ret.SetErrorStringWithFormat("Couldn't find function %s for disassembly",
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m_name.AsCString());
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return ret;
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}
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if (log)
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log->Printf("Found function, has local address 0x%" PRIx64
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" and remote address 0x%" PRIx64,
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(uint64_t)func_local_addr, (uint64_t)func_remote_addr);
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std::pair<lldb::addr_t, lldb::addr_t> func_range;
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func_range = GetRemoteRangeForLocal(func_local_addr);
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if (func_range.first == 0 && func_range.second == 0) {
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ret.SetErrorToGenericError();
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ret.SetErrorStringWithFormat("Couldn't find code range for function %s",
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m_name.AsCString());
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return ret;
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}
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if (log)
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log->Printf("Function's code range is [0x%" PRIx64 "+0x%" PRIx64 "]",
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func_range.first, func_range.second);
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Target *target = exe_ctx.GetTargetPtr();
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if (!target) {
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ret.SetErrorToGenericError();
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ret.SetErrorString("Couldn't find the target");
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return ret;
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}
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lldb::DataBufferSP buffer_sp(new DataBufferHeap(func_range.second, 0));
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Process *process = exe_ctx.GetProcessPtr();
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Status err;
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process->ReadMemory(func_remote_addr, buffer_sp->GetBytes(),
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buffer_sp->GetByteSize(), err);
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if (!err.Success()) {
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ret.SetErrorToGenericError();
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ret.SetErrorStringWithFormat("Couldn't read from process: %s",
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err.AsCString("unknown error"));
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return ret;
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}
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ArchSpec arch(target->GetArchitecture());
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const char *plugin_name = NULL;
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const char *flavor_string = NULL;
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lldb::DisassemblerSP disassembler_sp =
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Disassembler::FindPlugin(arch, flavor_string, plugin_name);
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if (!disassembler_sp) {
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ret.SetErrorToGenericError();
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ret.SetErrorStringWithFormat(
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"Unable to find disassembler plug-in for %s architecture.",
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arch.GetArchitectureName());
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return ret;
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}
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if (!process) {
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ret.SetErrorToGenericError();
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ret.SetErrorString("Couldn't find the process");
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return ret;
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}
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DataExtractor extractor(buffer_sp, process->GetByteOrder(),
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target->GetArchitecture().GetAddressByteSize());
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if (log) {
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log->Printf("Function data has contents:");
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extractor.PutToLog(log, 0, extractor.GetByteSize(), func_remote_addr, 16,
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DataExtractor::TypeUInt8);
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}
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disassembler_sp->DecodeInstructions(Address(func_remote_addr), extractor, 0,
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UINT32_MAX, false, false);
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InstructionList &instruction_list = disassembler_sp->GetInstructionList();
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instruction_list.Dump(&stream, true, true, &exe_ctx);
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return ret;
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}
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static void ReportInlineAsmError(const llvm::SMDiagnostic &diagnostic,
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void *Context, unsigned LocCookie) {
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Status *err = static_cast<Status *>(Context);
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if (err && err->Success()) {
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err->SetErrorToGenericError();
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err->SetErrorStringWithFormat("Inline assembly error: %s",
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diagnostic.getMessage().str().c_str());
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}
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}
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void IRExecutionUnit::ReportSymbolLookupError(const ConstString &name) {
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m_failed_lookups.push_back(name);
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}
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void IRExecutionUnit::GetRunnableInfo(Status &error, lldb::addr_t &func_addr,
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lldb::addr_t &func_end) {
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lldb::ProcessSP process_sp(GetProcessWP().lock());
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static std::recursive_mutex s_runnable_info_mutex;
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func_addr = LLDB_INVALID_ADDRESS;
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func_end = LLDB_INVALID_ADDRESS;
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if (!process_sp) {
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error.SetErrorToGenericError();
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error.SetErrorString("Couldn't write the JIT compiled code into the "
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"process because the process is invalid");
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return;
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}
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if (m_did_jit) {
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func_addr = m_function_load_addr;
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func_end = m_function_end_load_addr;
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return;
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};
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std::lock_guard<std::recursive_mutex> guard(s_runnable_info_mutex);
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m_did_jit = true;
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Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
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std::string error_string;
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if (log) {
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std::string s;
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llvm::raw_string_ostream oss(s);
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m_module->print(oss, NULL);
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oss.flush();
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log->Printf("Module being sent to JIT: \n%s", s.c_str());
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}
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llvm::Triple triple(m_module->getTargetTriple());
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llvm::Reloc::Model relocModel;
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if (triple.isOSBinFormatELF()) {
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relocModel = llvm::Reloc::Static;
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} else {
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relocModel = llvm::Reloc::PIC_;
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}
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m_module_ap->getContext().setInlineAsmDiagnosticHandler(ReportInlineAsmError,
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&error);
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llvm::EngineBuilder builder(std::move(m_module_ap));
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builder.setEngineKind(llvm::EngineKind::JIT)
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.setErrorStr(&error_string)
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.setRelocationModel(relocModel)
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.setMCJITMemoryManager(
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std::unique_ptr<MemoryManager>(new MemoryManager(*this)))
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.setOptLevel(llvm::CodeGenOpt::Less)
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.setUseOrcMCJITReplacement(true);
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llvm::StringRef mArch;
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llvm::StringRef mCPU;
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llvm::SmallVector<std::string, 0> mAttrs;
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for (std::string &feature : m_cpu_features)
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mAttrs.push_back(feature);
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llvm::TargetMachine *target_machine =
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builder.selectTarget(triple, mArch, mCPU, mAttrs);
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m_execution_engine_ap.reset(builder.create(target_machine));
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m_strip_underscore =
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(m_execution_engine_ap->getDataLayout().getGlobalPrefix() == '_');
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if (!m_execution_engine_ap.get()) {
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error.SetErrorToGenericError();
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error.SetErrorStringWithFormat("Couldn't JIT the function: %s",
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error_string.c_str());
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return;
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}
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class ObjectDumper : public llvm::ObjectCache {
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public:
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void notifyObjectCompiled(const llvm::Module *module,
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llvm::MemoryBufferRef object) override {
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int fd = 0;
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llvm::SmallVector<char, 256> result_path;
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std::string object_name_model =
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"jit-object-" + module->getModuleIdentifier() + "-%%%.o";
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(void)llvm::sys::fs::createUniqueFile(object_name_model, fd, result_path);
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llvm::raw_fd_ostream fds(fd, true);
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fds.write(object.getBufferStart(), object.getBufferSize());
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}
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std::unique_ptr<llvm::MemoryBuffer>
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getObject(const llvm::Module *module) override {
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// Return nothing - we're just abusing the object-cache mechanism to dump
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// objects.
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return nullptr;
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}
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};
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if (process_sp->GetTarget().GetEnableSaveObjects()) {
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m_object_cache_ap = llvm::make_unique<ObjectDumper>();
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m_execution_engine_ap->setObjectCache(m_object_cache_ap.get());
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}
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// Make sure we see all sections, including ones that don't have
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// relocations...
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m_execution_engine_ap->setProcessAllSections(true);
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m_execution_engine_ap->DisableLazyCompilation();
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for (llvm::Function &function : *m_module) {
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if (function.isDeclaration() || function.hasPrivateLinkage())
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continue;
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const bool external =
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function.hasExternalLinkage() || function.hasLinkOnceODRLinkage();
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void *fun_ptr = m_execution_engine_ap->getPointerToFunction(&function);
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if (!error.Success()) {
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// We got an error through our callback!
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return;
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}
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if (!fun_ptr) {
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error.SetErrorToGenericError();
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error.SetErrorStringWithFormat(
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"'%s' was in the JITted module but wasn't lowered",
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function.getName().str().c_str());
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return;
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}
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m_jitted_functions.push_back(JittedFunction(
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function.getName().str().c_str(), external, (lldb::addr_t)fun_ptr));
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}
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CommitAllocations(process_sp);
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ReportAllocations(*m_execution_engine_ap);
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// We have to do this after calling ReportAllocations because for the MCJIT,
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// getGlobalValueAddress
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// will cause the JIT to perform all relocations. That can only be done once,
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// and has to happen
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// after we do the remapping from local -> remote.
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// That means we don't know the local address of the Variables, but we don't
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// need that for anything,
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// so that's okay.
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std::function<void(llvm::GlobalValue &)> RegisterOneValue = [this](
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llvm::GlobalValue &val) {
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if (val.hasExternalLinkage() && !val.isDeclaration()) {
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uint64_t var_ptr_addr =
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m_execution_engine_ap->getGlobalValueAddress(val.getName().str());
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lldb::addr_t remote_addr = GetRemoteAddressForLocal(var_ptr_addr);
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// This is a really unfortunae API that sometimes returns local addresses
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// and sometimes returns remote addresses, based on whether
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// the variable was relocated during ReportAllocations or not.
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if (remote_addr == LLDB_INVALID_ADDRESS) {
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remote_addr = var_ptr_addr;
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}
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if (var_ptr_addr != 0)
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m_jitted_global_variables.push_back(JittedGlobalVariable(
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val.getName().str().c_str(), LLDB_INVALID_ADDRESS, remote_addr));
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}
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};
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for (llvm::GlobalVariable &global_var : m_module->getGlobalList()) {
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RegisterOneValue(global_var);
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}
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for (llvm::GlobalAlias &global_alias : m_module->getAliasList()) {
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RegisterOneValue(global_alias);
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}
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WriteData(process_sp);
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if (m_failed_lookups.size()) {
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StreamString ss;
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ss.PutCString("Couldn't lookup symbols:\n");
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bool emitNewLine = false;
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for (const ConstString &failed_lookup : m_failed_lookups) {
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if (emitNewLine)
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ss.PutCString("\n");
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emitNewLine = true;
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ss.PutCString(" ");
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ss.PutCString(Mangled(failed_lookup)
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.GetDemangledName(lldb::eLanguageTypeObjC_plus_plus)
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.AsCString());
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}
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m_failed_lookups.clear();
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error.SetErrorString(ss.GetString());
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return;
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}
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m_function_load_addr = LLDB_INVALID_ADDRESS;
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m_function_end_load_addr = LLDB_INVALID_ADDRESS;
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for (JittedFunction &jitted_function : m_jitted_functions) {
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jitted_function.m_remote_addr =
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GetRemoteAddressForLocal(jitted_function.m_local_addr);
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if (!m_name.IsEmpty() && jitted_function.m_name == m_name) {
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AddrRange func_range =
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GetRemoteRangeForLocal(jitted_function.m_local_addr);
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m_function_end_load_addr = func_range.first + func_range.second;
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m_function_load_addr = jitted_function.m_remote_addr;
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}
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}
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if (log) {
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log->Printf("Code can be run in the target.");
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StreamString disassembly_stream;
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Status err = DisassembleFunction(disassembly_stream, process_sp);
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if (!err.Success()) {
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log->Printf("Couldn't disassemble function : %s",
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err.AsCString("unknown error"));
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} else {
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log->Printf("Function disassembly:\n%s", disassembly_stream.GetData());
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}
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log->Printf("Sections: ");
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for (AllocationRecord &record : m_records) {
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if (record.m_process_address != LLDB_INVALID_ADDRESS) {
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record.dump(log);
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DataBufferHeap my_buffer(record.m_size, 0);
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Status err;
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ReadMemory(my_buffer.GetBytes(), record.m_process_address,
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record.m_size, err);
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if (err.Success()) {
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DataExtractor my_extractor(my_buffer.GetBytes(),
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my_buffer.GetByteSize(),
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lldb::eByteOrderBig, 8);
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my_extractor.PutToLog(log, 0, my_buffer.GetByteSize(),
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record.m_process_address, 16,
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DataExtractor::TypeUInt8);
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}
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} else {
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record.dump(log);
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DataExtractor my_extractor((const void *)record.m_host_address,
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record.m_size, lldb::eByteOrderBig, 8);
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my_extractor.PutToLog(log, 0, record.m_size, record.m_host_address, 16,
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DataExtractor::TypeUInt8);
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}
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}
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}
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func_addr = m_function_load_addr;
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func_end = m_function_end_load_addr;
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return;
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}
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IRExecutionUnit::~IRExecutionUnit() {
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m_module_ap.reset();
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m_execution_engine_ap.reset();
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m_context_ap.reset();
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}
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IRExecutionUnit::MemoryManager::MemoryManager(IRExecutionUnit &parent)
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: m_default_mm_ap(new llvm::SectionMemoryManager()), m_parent(parent) {}
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IRExecutionUnit::MemoryManager::~MemoryManager() {}
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lldb::SectionType IRExecutionUnit::GetSectionTypeFromSectionName(
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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;
|
|
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_")) {
|
|
#if 0
|
|
const uint32_t name_idx = name[0] == '_' ? 8 : 7;
|
|
llvm::StringRef apple_name(name.substr(name_idx));
|
|
switch (apple_name[0])
|
|
{
|
|
case 'n':
|
|
if (apple_name.equals("names"))
|
|
sect_type = lldb::eSectionTypeDWARFAppleNames;
|
|
else if (apple_name.equals("namespac") || apple_name.equals("namespaces"))
|
|
sect_type = lldb::eSectionTypeDWARFAppleNamespaces;
|
|
break;
|
|
case 't':
|
|
if (apple_name.equals("types"))
|
|
sect_type = lldb::eSectionTypeDWARFAppleTypes;
|
|
break;
|
|
case 'o':
|
|
if (apple_name.equals("objc"))
|
|
sect_type = lldb::eSectionTypeDWARFAppleObjC;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
#else
|
|
sect_type = lldb::eSectionTypeInvalid;
|
|
#endif
|
|
} 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_ap->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_ap->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(const 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;
|
|
uint32_t mask;
|
|
|
|
SearchSpec(ConstString n, uint32_t m = lldb::eFunctionNameTypeFull)
|
|
: name(n), mask(m) {}
|
|
};
|
|
|
|
void IRExecutionUnit::CollectCandidateCNames(
|
|
std::vector<IRExecutionUnit::SearchSpec> &C_specs,
|
|
const 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) {
|
|
const 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) {
|
|
const 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) {
|
|
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](
|
|
lldb::addr_t &load_address, SymbolContextList &sc_list,
|
|
const lldb_private::SymbolContext &sc) -> lldb::addr_t {
|
|
load_address = LLDB_INVALID_ADDRESS;
|
|
|
|
for (size_t si = 0, se = sc_list.GetSize(); si < se; ++si) {
|
|
SymbolContext candidate_sc;
|
|
|
|
sc_list.GetContextAtIndex(si, candidate_sc);
|
|
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
};
|
|
|
|
if (sc.module_sp) {
|
|
sc.module_sp->FindFunctions(spec.name, NULL, 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;
|
|
}
|
|
|
|
ObjCLanguageRuntime *runtime = process_sp->GetObjCLanguageRuntime();
|
|
|
|
if (runtime) {
|
|
for (const SearchSpec &spec : specs) {
|
|
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(const lldb_private::ConstString &name) {
|
|
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);
|
|
if (ret == LLDB_INVALID_ADDRESS)
|
|
ret = FindInRuntimes(candidate_C_names, m_sym_ctx);
|
|
|
|
if (ret == LLDB_INVALID_ADDRESS)
|
|
ret = FindInUserDefinedSymbols(candidate_C_names, m_sym_ctx);
|
|
|
|
if (ret == LLDB_INVALID_ADDRESS) {
|
|
CollectCandidateCPlusPlusNames(candidate_CPlusPlus_names, candidate_C_names,
|
|
m_sym_ctx);
|
|
ret = FindInSymbols(candidate_CPlusPlus_names, m_sym_ctx);
|
|
}
|
|
|
|
if (ret == LLDB_INVALID_ADDRESS) {
|
|
std::vector<SearchSpec> candidate_fallback_names;
|
|
|
|
CollectFallbackNames(candidate_fallback_names, candidate_C_names);
|
|
ret = FindInSymbols(candidate_fallback_names, m_sym_ctx);
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
uint64_t
|
|
IRExecutionUnit::MemoryManager::getSymbolAddress(const std::string &Name) {
|
|
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
|
|
|
|
ConstString name_cs(Name.c_str());
|
|
|
|
lldb::addr_t ret = m_parent.FindSymbol(name_cs);
|
|
|
|
if (ret == LLDB_INVALID_ADDRESS) {
|
|
if (log)
|
|
log->Printf(
|
|
"IRExecutionUnit::getSymbolAddress(Name=\"%s\") = <not found>",
|
|
Name.c_str());
|
|
|
|
m_parent.ReportSymbolLookupError(name_cs);
|
|
return 0xbad0bad0;
|
|
} 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) {
|
|
assert(sizeof(void *) == 8);
|
|
|
|
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::eSectionTypeDWARFDebugFrame:
|
|
case lldb::eSectionTypeDWARFDebugInfo:
|
|
case lldb::eSectionTypeDWARFDebugLine:
|
|
case lldb::eSectionTypeDWARFDebugLoc:
|
|
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:
|
|
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 §ion_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);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool IRExecutionUnit::GetArchitecture(lldb_private::ArchSpec &arch) {
|
|
ExecutionContext exe_ctx(GetBestExecutionContextScope());
|
|
Target *target = exe_ctx.GetTargetPtr();
|
|
if (target)
|
|
arch = target->GetArchitecture();
|
|
else
|
|
arch.Clear();
|
|
return arch.IsValid();
|
|
}
|
|
|
|
lldb::ModuleSP IRExecutionUnit::GetJITModule() {
|
|
ExecutionContext exe_ctx(GetBestExecutionContextScope());
|
|
Target *target = exe_ctx.GetTargetPtr();
|
|
if (target) {
|
|
lldb::ModuleSP jit_module_sp = lldb_private::Module::CreateJITModule(
|
|
std::static_pointer_cast<lldb_private::ObjectFileJITDelegate>(
|
|
shared_from_this()));
|
|
if (jit_module_sp) {
|
|
bool changed = false;
|
|
jit_module_sp->SetLoadAddress(*target, 0, true, changed);
|
|
}
|
|
return jit_module_sp;
|
|
}
|
|
return lldb::ModuleSP();
|
|
}
|