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357132eb9a7e47b58a097548ad484f7e4b1025a3
llvm/lldb/source/Expression/ClangExpressionParser.cpp
Greg Clayton 357132eb9a Added the ability to get the min and max instruction byte size for 
an architecture into ArchSpec:

uint32_t
ArchSpec::GetMinimumOpcodeByteSize() const;

uint32_t
ArchSpec::GetMaximumOpcodeByteSize() const;

Added an AddressClass to the Instruction class in Disassembler.h.
This allows decoded instructions to know know if they are code,
code with alternate ISA (thumb), or even data which can be mixed
into code. The instruction does have an address, but it is a good
idea to cache this value so we don't have to look it up more than 
once.

Fixed an issue in Opcode::SetOpcodeBytes() where the length wasn't
getting set.

Changed:

	bool
	SymbolContextList::AppendIfUnique (const SymbolContext& sc);

To:
	bool
	SymbolContextList::AppendIfUnique (const SymbolContext& sc, 
									   bool merge_symbol_into_function);

This function was typically being used when looking up functions
and symbols. Now if you lookup a function, then find the symbol,
they can be merged into the same symbol context and not cause
multiple symbol contexts to appear in a symbol context list that
describes the same function.

Fixed the SymbolContext not equal operator which was causing mixed
mode disassembly to not work ("disassembler --mixed --name main").

Modified the disassembler classes to know about the fact we know,
for a given architecture, what the min and max opcode byte sizes
are. The InstructionList class was modified to return the max
opcode byte size for all of the instructions in its list.
These two fixes means when disassemble a list of instructions and dump 
them and show the opcode bytes, we can format the output more 
intelligently when showing opcode bytes. This affects any architectures
that have varying opcode byte sizes (x86_64 and i386). Knowing the max
opcode byte size also helps us to be able to disassemble N instructions
without having to re-read data if we didn't read enough bytes.

Added the ability to set the architecture for the disassemble command.
This means you can easily cross disassemble data for any supported 
architecture. I also added the ability to specify "thumb" as an 
architecture so that we can force disassembly into thumb mode when
needed. In GDB this was done using a hack of specifying an odd
address when disassembling. I don't want to repeat this hack in LLDB,
so the auto detection between ARM and thumb is failing, just specify
thumb when disassembling:

(lldb) disassemble --arch thumb --name main

You can also have data in say an x86_64 file executable and disassemble
data as any other supported architecture:
% lldb a.out
Current executable set to 'a.out' (x86_64).
(lldb) b main
(lldb) run
(lldb) disassemble --arch thumb --count 2 --start-address 0x0000000100001080 --bytes
0x100001080:  0xb580 push   {r7, lr}
0x100001082:  0xaf00 add    r7, sp, #0

Fixed Target::ReadMemory(...) to be able to deal with Address argument object
that isn't section offset. When an address object was supplied that was
out on the heap or stack, target read memory would fail. Disassembly uses
Target::ReadMemory(...), and the example above where we disassembler thumb
opcodes in an x86 binary was failing do to this bug.

llvm-svn: 128347
2011-03-26 19:14:58 +00:00

762 lines
27 KiB
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//===-- ClangExpressionParser.cpp -------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Expression/ClangExpressionParser.h"
#include "lldb/Core/ArchSpec.h"
#include "lldb/Core/DataBufferHeap.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Core/Disassembler.h"
#include "lldb/Core/Stream.h"
#include "lldb/Core/StreamString.h"
#include "lldb/Expression/ClangASTSource.h"
#include "lldb/Expression/ClangExpression.h"
#include "lldb/Expression/IRDynamicChecks.h"
#include "lldb/Expression/IRForTarget.h"
#include "lldb/Expression/IRToDWARF.h"
#include "lldb/Expression/RecordingMemoryManager.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/ObjCLanguageRuntime.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Target.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/ExternalASTSource.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/Version.h"
#include "clang/CodeGen/CodeGenAction.h"
#include "clang/CodeGen/ModuleBuilder.h"
#include "clang/Driver/CC1Options.h"
#include "clang/Driver/OptTable.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/CompilerInvocation.h"
#include "clang/Frontend/FrontendActions.h"
#include "clang/Frontend/FrontendDiagnostic.h"
#include "clang/Frontend/FrontendPluginRegistry.h"
#include "clang/Frontend/TextDiagnosticBuffer.h"
#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "clang/Frontend/VerifyDiagnosticsClient.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Parse/ParseAST.h"
#include "clang/Rewrite/FrontendActions.h"
#include "clang/Sema/SemaConsumer.h"
#include "clang/StaticAnalyzer/Frontend/FrontendActions.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ExecutionEngine/ExecutionEngine.h"
#include "llvm/ExecutionEngine/JIT.h"
#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/Signals.h"
#include "llvm/Target/TargetRegistry.h"
#include "llvm/Target/TargetSelect.h"
using namespace clang;
using namespace llvm;
using namespace lldb_private;
//===----------------------------------------------------------------------===//
// Utility Methods for Clang
//===----------------------------------------------------------------------===//
std::string GetBuiltinIncludePath(const char *Argv0) {
llvm::sys::Path P =
llvm::sys::Path::GetMainExecutable(Argv0,
(void*)(intptr_t) GetBuiltinIncludePath);
if (!P.isEmpty()) {
P.eraseComponent(); // Remove /clang from foo/bin/clang
P.eraseComponent(); // Remove /bin from foo/bin
// Get foo/lib/clang/<version>/include
P.appendComponent("lib");
P.appendComponent("clang");
P.appendComponent(CLANG_VERSION_STRING);
P.appendComponent("include");
}
return P.str();
}
//===----------------------------------------------------------------------===//
// Main driver for Clang
//===----------------------------------------------------------------------===//
static void LLVMErrorHandler(void *UserData, const std::string &Message) {
Diagnostic &Diags = *static_cast<Diagnostic*>(UserData);
Diags.Report(diag::err_fe_error_backend) << Message;
// We cannot recover from llvm errors.
exit(1);
}
static FrontendAction *CreateFrontendBaseAction(CompilerInstance &CI) {
using namespace clang::frontend;
switch (CI.getFrontendOpts().ProgramAction) {
default:
llvm_unreachable("Invalid program action!");
case ASTDump: return new ASTDumpAction();
case ASTPrint: return new ASTPrintAction();
case ASTDumpXML: return new ASTDumpXMLAction();
case ASTView: return new ASTViewAction();
case BoostCon: return new BoostConAction();
case DumpRawTokens: return new DumpRawTokensAction();
case DumpTokens: return new DumpTokensAction();
case EmitAssembly: return new EmitAssemblyAction();
case EmitBC: return new EmitBCAction();
case EmitHTML: return new HTMLPrintAction();
case EmitLLVM: return new EmitLLVMAction();
case EmitLLVMOnly: return new EmitLLVMOnlyAction();
case EmitCodeGenOnly: return new EmitCodeGenOnlyAction();
case EmitObj: return new EmitObjAction();
case FixIt: return new FixItAction();
case GeneratePCH: return new GeneratePCHAction();
case GeneratePTH: return new GeneratePTHAction();
case InitOnly: return new InitOnlyAction();
case ParseSyntaxOnly: return new SyntaxOnlyAction();
case PluginAction: {
for (FrontendPluginRegistry::iterator it =
FrontendPluginRegistry::begin(), ie = FrontendPluginRegistry::end();
it != ie; ++it) {
if (it->getName() == CI.getFrontendOpts().ActionName) {
llvm::OwningPtr<PluginASTAction> P(it->instantiate());
if (!P->ParseArgs(CI, CI.getFrontendOpts().PluginArgs))
return 0;
return P.take();
}
}
CI.getDiagnostics().Report(diag::err_fe_invalid_plugin_name)
<< CI.getFrontendOpts().ActionName;
return 0;
}
case PrintDeclContext: return new DeclContextPrintAction();
case PrintPreamble: return new PrintPreambleAction();
case PrintPreprocessedInput: return new PrintPreprocessedAction();
case RewriteMacros: return new RewriteMacrosAction();
case RewriteObjC: return new RewriteObjCAction();
case RewriteTest: return new RewriteTestAction();
//case RunAnalysis: return new AnalysisAction();
case RunPreprocessorOnly: return new PreprocessOnlyAction();
}
}
static FrontendAction *CreateFrontendAction(CompilerInstance &CI) {
// Create the underlying action.
FrontendAction *Act = CreateFrontendBaseAction(CI);
if (!Act)
return 0;
// If there are any AST files to merge, create a frontend action
// adaptor to perform the merge.
if (!CI.getFrontendOpts().ASTMergeFiles.empty())
Act = new ASTMergeAction(Act, &CI.getFrontendOpts().ASTMergeFiles[0],
CI.getFrontendOpts().ASTMergeFiles.size());
return Act;
}
//===----------------------------------------------------------------------===//
// Implementation of ClangExpressionParser
//===----------------------------------------------------------------------===//
ClangExpressionParser::ClangExpressionParser (ExecutionContextScope *exe_scope,
ClangExpression &expr) :
m_expr (expr),
m_compiler (),
m_code_generator (NULL),
m_execution_engine (),
m_jitted_functions ()
{
// Initialize targets first, so that --version shows registered targets.
static struct InitializeLLVM {
InitializeLLVM() {
llvm::InitializeAllTargets();
llvm::InitializeAllAsmPrinters();
}
} InitializeLLVM;
// 1. Create a new compiler instance.
m_compiler.reset(new CompilerInstance());
// 2. Set options.
// Parse expressions as Objective C++ regardless of context.
// Our hook into Clang's lookup mechanism only works in C++.
m_compiler->getLangOpts().CPlusPlus = true;
// Setup objective C
m_compiler->getLangOpts().ObjC1 = true;
m_compiler->getLangOpts().ObjC2 = true;
Process *process = NULL;
if (exe_scope)
process = exe_scope->CalculateProcess();
if (process)
{
if (process->GetObjCLanguageRuntime())
{
if (process->GetObjCLanguageRuntime()->GetRuntimeVersion() == eAppleObjC_V2)
{
m_compiler->getLangOpts().ObjCNonFragileABI = true; // NOT i386
m_compiler->getLangOpts().ObjCNonFragileABI2 = true; // NOT i386
}
}
}
m_compiler->getLangOpts().ThreadsafeStatics = false;
m_compiler->getLangOpts().AccessControl = false; // Debuggers get universal access
m_compiler->getLangOpts().DollarIdents = true; // $ indicates a persistent variable name
// Set CodeGen options
m_compiler->getCodeGenOpts().EmitDeclMetadata = true;
m_compiler->getCodeGenOpts().InstrumentFunctions = false;
// Disable some warnings.
m_compiler->getDiagnosticOpts().Warnings.push_back("no-unused-value");
// Set the target triple.
Target *target = NULL;
if (exe_scope)
target = exe_scope->CalculateTarget();
// TODO: figure out what to really do when we don't have a valid target.
// Sometimes this will be ok to just use the host target triple (when we
// evaluate say "2+3", but other expressions like breakpoint conditions
// and other things that _are_ target specific really shouldn't just be
// using the host triple. This needs to be fixed in a better way.
if (target && target->GetArchitecture().IsValid())
m_compiler->getTargetOpts().Triple = target->GetArchitecture().GetTriple().str();
else
m_compiler->getTargetOpts().Triple = llvm::sys::getHostTriple();
// 3. Set up various important bits of infrastructure.
m_compiler->createDiagnostics(0, 0);
// Create the target instance.
m_compiler->setTarget(TargetInfo::CreateTargetInfo(m_compiler->getDiagnostics(),
m_compiler->getTargetOpts()));
assert (m_compiler->hasTarget());
// Inform the target of the language options
//
// FIXME: We shouldn't need to do this, the target should be immutable once
// created. This complexity should be lifted elsewhere.
m_compiler->getTarget().setForcedLangOptions(m_compiler->getLangOpts());
// 4. Set up the diagnostic buffer for reporting errors
m_compiler->getDiagnostics().setClient(new clang::TextDiagnosticBuffer);
// 5. Set up the source management objects inside the compiler
clang::FileSystemOptions file_system_options;
m_file_manager.reset(new clang::FileManager(file_system_options));
if (!m_compiler->hasSourceManager())
m_compiler->createSourceManager(*m_file_manager.get());
m_compiler->createFileManager();
m_compiler->createPreprocessor();
// 6. Most of this we get from the CompilerInstance, but we
// also want to give the context an ExternalASTSource.
m_selector_table.reset(new SelectorTable());
m_builtin_context.reset(new Builtin::Context(m_compiler->getTarget()));
std::auto_ptr<clang::ASTContext> ast_context(new ASTContext(m_compiler->getLangOpts(),
m_compiler->getSourceManager(),
m_compiler->getTarget(),
m_compiler->getPreprocessor().getIdentifierTable(),
*m_selector_table.get(),
*m_builtin_context.get(),
0));
ClangExpressionDeclMap *decl_map = m_expr.DeclMap();
if (decl_map)
{
OwningPtr<clang::ExternalASTSource> ast_source(new ClangASTSource(*ast_context, *decl_map));
ast_context->setExternalSource(ast_source);
}
m_compiler->setASTContext(ast_context.release());
std::string module_name("$__lldb_module");
m_llvm_context.reset(new LLVMContext());
m_code_generator.reset(CreateLLVMCodeGen(m_compiler->getDiagnostics(),
module_name,
m_compiler->getCodeGenOpts(),
*m_llvm_context));
}
ClangExpressionParser::~ClangExpressionParser()
{
}
unsigned
ClangExpressionParser::Parse (Stream &stream)
{
TextDiagnosticBuffer *diag_buf = static_cast<TextDiagnosticBuffer*>(m_compiler->getDiagnostics().getClient());
diag_buf->FlushDiagnostics (m_compiler->getDiagnostics());
MemoryBuffer *memory_buffer = MemoryBuffer::getMemBufferCopy(m_expr.Text(), __FUNCTION__);
FileID memory_buffer_file_id = m_compiler->getSourceManager().createMainFileIDForMemBuffer (memory_buffer);
diag_buf->BeginSourceFile(m_compiler->getLangOpts(), &m_compiler->getPreprocessor());
ASTConsumer *ast_transformer = m_expr.ASTTransformer(m_code_generator.get());
if (ast_transformer)
ParseAST(m_compiler->getPreprocessor(), ast_transformer, m_compiler->getASTContext());
else
ParseAST(m_compiler->getPreprocessor(), m_code_generator.get(), m_compiler->getASTContext());
diag_buf->EndSourceFile();
TextDiagnosticBuffer::const_iterator diag_iterator;
int num_errors = 0;
for (diag_iterator = diag_buf->warn_begin();
diag_iterator != diag_buf->warn_end();
++diag_iterator)
stream.Printf("warning: %s\n", (*diag_iterator).second.c_str());
num_errors = 0;
for (diag_iterator = diag_buf->err_begin();
diag_iterator != diag_buf->err_end();
++diag_iterator)
{
num_errors++;
stream.Printf("error: %s\n", (*diag_iterator).second.c_str());
}
for (diag_iterator = diag_buf->note_begin();
diag_iterator != diag_buf->note_end();
++diag_iterator)
stream.Printf("note: %s\n", (*diag_iterator).second.c_str());
return num_errors;
}
static bool FindFunctionInModule (std::string &mangled_name,
llvm::Module *module,
const char *orig_name)
{
for (llvm::Module::iterator fi = module->getFunctionList().begin(), fe = module->getFunctionList().end();
fi != fe;
++fi)
{
if (fi->getName().str().find(orig_name) != std::string::npos)
{
mangled_name = fi->getName().str();
return true;
}
}
return false;
}
Error
ClangExpressionParser::MakeDWARF ()
{
Error err;
llvm::Module *module = m_code_generator->GetModule();
if (!module)
{
err.SetErrorToGenericError();
err.SetErrorString("IR doesn't contain a module");
return err;
}
ClangExpressionVariableList *local_variables = m_expr.LocalVariables();
ClangExpressionDeclMap *decl_map = m_expr.DeclMap();
if (!local_variables)
{
err.SetErrorToGenericError();
err.SetErrorString("Can't convert an expression without a VariableList to DWARF");
return err;
}
if (!decl_map)
{
err.SetErrorToGenericError();
err.SetErrorString("Can't convert an expression without a DeclMap to DWARF");
return err;
}
std::string function_name;
if (!FindFunctionInModule(function_name, module, m_expr.FunctionName()))
{
err.SetErrorToGenericError();
err.SetErrorStringWithFormat("Couldn't find %s() in the module", m_expr.FunctionName());
return err;
}
IRToDWARF ir_to_dwarf(*local_variables, decl_map, m_expr.DwarfOpcodeStream(), function_name.c_str());
if (!ir_to_dwarf.runOnModule(*module))
{
err.SetErrorToGenericError();
err.SetErrorString("Couldn't convert the expression to DWARF");
return err;
}
err.Clear();
return err;
}
Error
ClangExpressionParser::MakeJIT (lldb::addr_t &func_allocation_addr,
lldb::addr_t &func_addr,
lldb::addr_t &func_end,
ExecutionContext &exe_ctx,
lldb::ClangExpressionVariableSP *const_result)
{
func_allocation_addr = LLDB_INVALID_ADDRESS;
func_addr = LLDB_INVALID_ADDRESS;
func_end = LLDB_INVALID_ADDRESS;
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
Error err;
llvm::Module *module = m_code_generator->ReleaseModule();
if (!module)
{
err.SetErrorToGenericError();
err.SetErrorString("IR doesn't contain a module");
return err;
}
// Find the actual name of the function (it's often mangled somehow)
std::string function_name;
if (!FindFunctionInModule(function_name, module, m_expr.FunctionName()))
{
err.SetErrorToGenericError();
err.SetErrorStringWithFormat("Couldn't find %s() in the module", m_expr.FunctionName());
return err;
}
else
{
if(log)
log->Printf("Found function %s for %s", function_name.c_str(), m_expr.FunctionName());
}
ClangExpressionDeclMap *decl_map = m_expr.DeclMap(); // result can be NULL
if (decl_map)
{
Stream *error_stream = NULL;
if (exe_ctx.target)
error_stream = &exe_ctx.target->GetDebugger().GetErrorStream();
IRForTarget ir_for_target(decl_map,
m_expr.NeedsVariableResolution(),
const_result,
error_stream,
function_name.c_str());
if (!ir_for_target.runOnModule(*module))
{
err.SetErrorToGenericError();
err.SetErrorString("Couldn't convert the expression to DWARF");
return err;
}
if (m_expr.NeedsValidation() && exe_ctx.process->GetDynamicCheckers())
{
IRDynamicChecks ir_dynamic_checks(*exe_ctx.process->GetDynamicCheckers(), function_name.c_str());
if (!ir_dynamic_checks.runOnModule(*module))
{
err.SetErrorToGenericError();
err.SetErrorString("Couldn't add dynamic checks to the expression");
return err;
}
}
}
// llvm will own this pointer when llvm::ExecutionEngine::createJIT is called
// below so we don't need to free it.
RecordingMemoryManager *jit_memory_manager = new RecordingMemoryManager();
std::string error_string;
llvm::TargetMachine::setRelocationModel(llvm::Reloc::PIC_);
m_execution_engine.reset(llvm::ExecutionEngine::createJIT (module,
&error_string,
jit_memory_manager,
CodeGenOpt::Less,
true,
CodeModel::Small));
if (!m_execution_engine.get())
{
err.SetErrorToGenericError();
err.SetErrorStringWithFormat("Couldn't JIT the function: %s", error_string.c_str());
return err;
}
m_execution_engine->DisableLazyCompilation();
llvm::Function *function = module->getFunction (function_name.c_str());
// We don't actually need the function pointer here, this just forces it to get resolved.
void *fun_ptr = m_execution_engine->getPointerToFunction(function);
// Errors usually cause failures in the JIT, but if we're lucky we get here.
if (!fun_ptr)
{
err.SetErrorToGenericError();
err.SetErrorString("Couldn't JIT the function");
return err;
}
m_jitted_functions.push_back (ClangExpressionParser::JittedFunction(function_name.c_str(), (lldb::addr_t)fun_ptr));
ExecutionContext &exc_context(exe_ctx);
if (exc_context.process == NULL)
{
err.SetErrorToGenericError();
err.SetErrorString("Couldn't write the JIT compiled code into the target because there is no target");
return err;
}
// Look over the regions allocated for the function compiled. The JIT
// tries to allocate the functions & stubs close together, so we should try to
// write them that way too...
// For now I only write functions with no stubs, globals, exception tables,
// etc. So I only need to write the functions.
size_t alloc_size = 0;
std::map<uint8_t *, uint8_t *>::iterator fun_pos = jit_memory_manager->m_functions.begin();
std::map<uint8_t *, uint8_t *>::iterator fun_end = jit_memory_manager->m_functions.end();
for (; fun_pos != fun_end; ++fun_pos)
alloc_size += (*fun_pos).second - (*fun_pos).first;
Error alloc_error;
func_allocation_addr = exc_context.process->AllocateMemory (alloc_size,
lldb::ePermissionsReadable|lldb::ePermissionsExecutable,
alloc_error);
if (func_allocation_addr == LLDB_INVALID_ADDRESS)
{
err.SetErrorToGenericError();
err.SetErrorStringWithFormat("Couldn't allocate memory for the JITted function: %s", alloc_error.AsCString("unknown error"));
return err;
}
lldb::addr_t cursor = func_allocation_addr;
for (fun_pos = jit_memory_manager->m_functions.begin(); fun_pos != fun_end; fun_pos++)
{
lldb::addr_t lstart = (lldb::addr_t) (*fun_pos).first;
lldb::addr_t lend = (lldb::addr_t) (*fun_pos).second;
size_t size = lend - lstart;
Error write_error;
if (exc_context.process->WriteMemory(cursor, (void *) lstart, size, write_error) != size)
{
err.SetErrorToGenericError();
err.SetErrorStringWithFormat("Couldn't copy JITted function into the target: %s", write_error.AsCString("unknown error"));
return err;
}
jit_memory_manager->AddToLocalToRemoteMap (lstart, size, cursor);
cursor += size;
}
std::vector<JittedFunction>::iterator pos, end = m_jitted_functions.end();
for (pos = m_jitted_functions.begin(); pos != end; pos++)
{
(*pos).m_remote_addr = jit_memory_manager->GetRemoteAddressForLocal ((*pos).m_local_addr);
if (!(*pos).m_name.compare(function_name.c_str()))
{
func_end = jit_memory_manager->GetRemoteRangeForLocal ((*pos).m_local_addr).second;
func_addr = (*pos).m_remote_addr;
}
}
if (log)
{
log->Printf("Code can be run in the target.");
StreamString disassembly_stream;
Error err = DisassembleFunction(disassembly_stream, exe_ctx, jit_memory_manager);
if (!err.Success())
{
log->Printf("Couldn't disassemble function : %s", err.AsCString("unknown error"));
}
else
{
log->Printf("Function disassembly:\n%s", disassembly_stream.GetData());
}
}
err.Clear();
return err;
}
Error
ClangExpressionParser::DisassembleFunction (Stream &stream, ExecutionContext &exe_ctx, RecordingMemoryManager *jit_memory_manager)
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
const char *name = m_expr.FunctionName();
Error ret;
ret.Clear();
lldb::addr_t func_local_addr = LLDB_INVALID_ADDRESS;
lldb::addr_t func_remote_addr = LLDB_INVALID_ADDRESS;
std::vector<JittedFunction>::iterator pos, end = m_jitted_functions.end();
for (pos = m_jitted_functions.begin(); pos < end; pos++)
{
if (strstr(pos->m_name.c_str(), name))
{
func_local_addr = pos->m_local_addr;
func_remote_addr = pos->m_remote_addr;
}
}
if (func_local_addr == LLDB_INVALID_ADDRESS)
{
ret.SetErrorToGenericError();
ret.SetErrorStringWithFormat("Couldn't find function %s for disassembly", name);
return ret;
}
if(log)
log->Printf("Found function, has local address 0x%llx and remote address 0x%llx", (uint64_t)func_local_addr, (uint64_t)func_remote_addr);
std::pair <lldb::addr_t, lldb::addr_t> func_range;
func_range = jit_memory_manager->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", name);
return ret;
}
if(log)
log->Printf("Function's code range is [0x%llx-0x%llx]", func_range.first, func_range.second);
if (!exe_ctx.target)
{
ret.SetErrorToGenericError();
ret.SetErrorString("Couldn't find the target");
}
lldb::DataBufferSP buffer_sp(new DataBufferHeap(func_range.second - func_remote_addr, 0));
Error err;
exe_ctx.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(exe_ctx.target->GetArchitecture());
Disassembler *disassembler = Disassembler::FindPlugin(arch, NULL);
if (disassembler == NULL)
{
ret.SetErrorToGenericError();
ret.SetErrorStringWithFormat("Unable to find disassembler plug-in for %s architecture.", arch.GetArchitectureName());
return ret;
}
if (!exe_ctx.process)
{
ret.SetErrorToGenericError();
ret.SetErrorString("Couldn't find the process");
return ret;
}
DataExtractor extractor(buffer_sp,
exe_ctx.process->GetByteOrder(),
exe_ctx.target->GetArchitecture().GetAddressByteSize());
if (log)
{
log->Printf("Function data has contents:");
extractor.PutToLog (log.get(),
0,
extractor.GetByteSize(),
func_remote_addr,
16,
DataExtractor::TypeUInt8);
}
disassembler->DecodeInstructions (Address (NULL, func_remote_addr), extractor, 0, UINT32_MAX, false);
InstructionList &instruction_list = disassembler->GetInstructionList();
const uint32_t max_opcode_byte_size = instruction_list.GetMaxOpcocdeByteSize();
for (uint32_t instruction_index = 0, num_instructions = instruction_list.GetSize();
instruction_index < num_instructions;
++instruction_index)
{
Instruction *instruction = instruction_list.GetInstructionAtIndex(instruction_index).get();
instruction->Dump (&stream,
max_opcode_byte_size,
true,
true,
&exe_ctx,
true);
stream.PutChar('\n');
}
return ret;
}
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