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llvm-project/lldb/source/Commands/CommandObjectSource.cpp

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//===-- CommandObjectSource.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 "CommandObjectSource.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Core/FileLineResolver.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Core/SourceManager.h"
#include "lldb/Host/OptionParser.h"
#include "lldb/Interpreter/CommandCompletions.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/CommandReturnObject.h"
#include "lldb/Interpreter/OptionArgParser.h"
#include "lldb/Interpreter/Options.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/Function.h"
#include "lldb/Symbol/Symbol.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/SectionLoadList.h"
#include "lldb/Target/StackFrame.h"
#include "lldb/Target/TargetList.h"
#include "lldb/Utility/FileSpec.h"
using namespace lldb;
using namespace lldb_private;
#pragma mark CommandObjectSourceInfo
// CommandObjectSourceInfo - debug line entries dumping command
#define LLDB_OPTIONS_source_info
#include "CommandOptions.inc"
class CommandObjectSourceInfo : public CommandObjectParsed {
class CommandOptions : public Options {
public:
CommandOptions() : Options() {}
~CommandOptions() override = default;
Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_arg,
ExecutionContext *execution_context) override {
Status error;
const int short_option = GetDefinitions()[option_idx].short_option;
switch (short_option) {
case 'l':
if (option_arg.getAsInteger(0, start_line))
error.SetErrorStringWithFormat("invalid line number: '%s'",
option_arg.str().c_str());
break;
case 'e':
if (option_arg.getAsInteger(0, end_line))
error.SetErrorStringWithFormat("invalid line number: '%s'",
option_arg.str().c_str());
break;
case 'c':
if (option_arg.getAsInteger(0, num_lines))
error.SetErrorStringWithFormat("invalid line count: '%s'",
option_arg.str().c_str());
break;
case 'f':
file_name = option_arg;
break;
case 'n':
symbol_name = option_arg;
break;
case 'a': {
address = OptionArgParser::ToAddress(execution_context, option_arg,
LLDB_INVALID_ADDRESS, &error);
} break;
case 's':
modules.push_back(std::string(option_arg));
break;
default:
error.SetErrorStringWithFormat("unrecognized short option '%c'",
short_option);
break;
}
return error;
}
void OptionParsingStarting(ExecutionContext *execution_context) override {
file_spec.Clear();
file_name.clear();
symbol_name.clear();
address = LLDB_INVALID_ADDRESS;
start_line = 0;
end_line = 0;
num_lines = 0;
modules.clear();
}
llvm::ArrayRef<OptionDefinition> GetDefinitions() override {
return llvm::makeArrayRef(g_source_info_options);
}
// Instance variables to hold the values for command options.
FileSpec file_spec;
std::string file_name;
std::string symbol_name;
lldb::addr_t address;
uint32_t start_line;
uint32_t end_line;
uint32_t num_lines;
STLStringArray modules;
};
public:
CommandObjectSourceInfo(CommandInterpreter &interpreter)
: CommandObjectParsed(
interpreter, "source info",
"Display source line information for the current target "
"process. Defaults to instruction pointer in current stack "
"frame.",
nullptr, eCommandRequiresTarget),
m_options() {}
~CommandObjectSourceInfo() override = default;
Options *GetOptions() override { return &m_options; }
protected:
// Dump the line entries in each symbol context. Return the number of entries
// found. If module_list is set, only dump lines contained in one of the
// modules. If file_spec is set, only dump lines in the file. If the
// start_line option was specified, don't print lines less than start_line.
// If the end_line option was specified, don't print lines greater than
// end_line. If the num_lines option was specified, dont print more than
// num_lines entries.
uint32_t DumpLinesInSymbolContexts(Stream &strm,
const SymbolContextList &sc_list,
const ModuleList &module_list,
const FileSpec &file_spec) {
uint32_t start_line = m_options.start_line;
uint32_t end_line = m_options.end_line;
uint32_t num_lines = m_options.num_lines;
Target *target = m_exe_ctx.GetTargetPtr();
uint32_t num_matches = 0;
bool has_path = false;
if (file_spec) {
assert(file_spec.GetFilename().AsCString());
has_path = (file_spec.GetDirectory().AsCString() != nullptr);
}
// Dump all the line entries for the file in the list.
ConstString last_module_file_name;
uint32_t num_scs = sc_list.GetSize();
for (uint32_t i = 0; i < num_scs; ++i) {
SymbolContext sc;
sc_list.GetContextAtIndex(i, sc);
if (sc.comp_unit) {
Module *module = sc.module_sp.get();
CompileUnit *cu = sc.comp_unit;
const LineEntry &line_entry = sc.line_entry;
assert(module && cu);
// Are we looking for specific modules, files or lines?
if (module_list.GetSize() &&
module_list.GetIndexForModule(module) == LLDB_INVALID_INDEX32)
continue;
if (file_spec &&
!lldb_private::FileSpec::Equal(file_spec, line_entry.file,
has_path))
continue;
if (start_line > 0 && line_entry.line < start_line)
continue;
if (end_line > 0 && line_entry.line > end_line)
continue;
if (num_lines > 0 && num_matches > num_lines)
continue;
// Print a new header if the module changed.
ConstString module_file_name =
module->GetFileSpec().GetFilename();
assert(module_file_name);
if (module_file_name != last_module_file_name) {
if (num_matches > 0)
strm << "\n\n";
strm << "Lines found in module `" << module_file_name << "\n";
}
// Dump the line entry.
line_entry.GetDescription(&strm, lldb::eDescriptionLevelBrief, cu,
target, /*show_address_only=*/false);
strm << "\n";
last_module_file_name = module_file_name;
num_matches++;
}
}
return num_matches;
}
// Dump the requested line entries for the file in the compilation unit.
// Return the number of entries found. If module_list is set, only dump lines
// contained in one of the modules. If the start_line option was specified,
// don't print lines less than start_line. If the end_line option was
// specified, don't print lines greater than end_line. If the num_lines
// option was specified, dont print more than num_lines entries.
uint32_t DumpFileLinesInCompUnit(Stream &strm, Module *module,
CompileUnit *cu, const FileSpec &file_spec) {
uint32_t start_line = m_options.start_line;
uint32_t end_line = m_options.end_line;
uint32_t num_lines = m_options.num_lines;
Target *target = m_exe_ctx.GetTargetPtr();
uint32_t num_matches = 0;
assert(module);
if (cu) {
assert(file_spec.GetFilename().AsCString());
bool has_path = (file_spec.GetDirectory().AsCString() != nullptr);
const FileSpecList &cu_file_list = cu->GetSupportFiles();
size_t file_idx = cu_file_list.FindFileIndex(0, file_spec, has_path);
if (file_idx != UINT32_MAX) {
// Update the file to how it appears in the CU.
const FileSpec &cu_file_spec =
cu_file_list.GetFileSpecAtIndex(file_idx);
// Dump all matching lines at or above start_line for the file in the
// CU.
ConstString file_spec_name = file_spec.GetFilename();
ConstString module_file_name =
module->GetFileSpec().GetFilename();
bool cu_header_printed = false;
uint32_t line = start_line;
while (true) {
LineEntry line_entry;
// Find the lowest index of a line entry with a line equal to or
// higher than 'line'.
uint32_t start_idx = 0;
start_idx = cu->FindLineEntry(start_idx, line, &cu_file_spec,
/*exact=*/false, &line_entry);
if (start_idx == UINT32_MAX)
// No more line entries for our file in this CU.
break;
if (end_line > 0 && line_entry.line > end_line)
break;
// Loop through to find any other entries for this line, dumping
// each.
line = line_entry.line;
do {
num_matches++;
if (num_lines > 0 && num_matches > num_lines)
break;
assert(lldb_private::FileSpec::Equal(cu_file_spec, line_entry.file,
has_path));
if (!cu_header_printed) {
if (num_matches > 0)
strm << "\n\n";
strm << "Lines found for file " << file_spec_name
<< " in compilation unit " << cu->GetFilename() << " in `"
<< module_file_name << "\n";
cu_header_printed = true;
}
line_entry.GetDescription(&strm, lldb::eDescriptionLevelBrief, cu,
target, /*show_address_only=*/false);
strm << "\n";
// Anymore after this one?
start_idx++;
start_idx = cu->FindLineEntry(start_idx, line, &cu_file_spec,
/*exact=*/true, &line_entry);
} while (start_idx != UINT32_MAX);
// Try the next higher line, starting over at start_idx 0.
line++;
}
}
}
return num_matches;
}
// Dump the requested line entries for the file in the module. Return the
// number of entries found. If module_list is set, only dump lines contained
// in one of the modules. If the start_line option was specified, don't print
// lines less than start_line. If the end_line option was specified, don't
// print lines greater than end_line. If the num_lines option was specified,
// dont print more than num_lines entries.
uint32_t DumpFileLinesInModule(Stream &strm, Module *module,
const FileSpec &file_spec) {
uint32_t num_matches = 0;
if (module) {
// Look through all the compilation units (CUs) in this module for ones
// that contain lines of code from this source file.
for (size_t i = 0; i < module->GetNumCompileUnits(); i++) {
// Look for a matching source file in this CU.
CompUnitSP cu_sp(module->GetCompileUnitAtIndex(i));
if (cu_sp) {
num_matches +=
DumpFileLinesInCompUnit(strm, module, cu_sp.get(), file_spec);
}
}
}
return num_matches;
}
// Given an address and a list of modules, append the symbol contexts of all
// line entries containing the address found in the modules and return the
// count of matches. If none is found, return an error in 'error_strm'.
size_t GetSymbolContextsForAddress(const ModuleList &module_list,
lldb::addr_t addr,
SymbolContextList &sc_list,
StreamString &error_strm) {
Address so_addr;
size_t num_matches = 0;
assert(module_list.GetSize() > 0);
Target *target = m_exe_ctx.GetTargetPtr();
if (target->GetSectionLoadList().IsEmpty()) {
// The target isn't loaded yet, we need to lookup the file address in all
// modules. Note: the module list option does not apply to addresses.
const size_t num_modules = module_list.GetSize();
for (size_t i = 0; i < num_modules; ++i) {
ModuleSP module_sp(module_list.GetModuleAtIndex(i));
if (!module_sp)
continue;
if (module_sp->ResolveFileAddress(addr, so_addr)) {
SymbolContext sc;
sc.Clear(true);
if (module_sp->ResolveSymbolContextForAddress(
so_addr, eSymbolContextEverything, sc) &
eSymbolContextLineEntry) {
sc_list.AppendIfUnique(sc, /*merge_symbol_into_function=*/false);
++num_matches;
}
}
}
if (num_matches == 0)
error_strm.Printf("Source information for file address 0x%" PRIx64
" not found in any modules.\n",
addr);
} else {
// The target has some things loaded, resolve this address to a compile
// unit + file + line and display
if (target->GetSectionLoadList().ResolveLoadAddress(addr, so_addr)) {
ModuleSP module_sp(so_addr.GetModule());
// Check to make sure this module is in our list.
if (module_sp &&
module_list.GetIndexForModule(module_sp.get()) !=
LLDB_INVALID_INDEX32) {
SymbolContext sc;
sc.Clear(true);
if (module_sp->ResolveSymbolContextForAddress(
so_addr, eSymbolContextEverything, sc) &
eSymbolContextLineEntry) {
sc_list.AppendIfUnique(sc, /*merge_symbol_into_function=*/false);
++num_matches;
} else {
StreamString addr_strm;
so_addr.Dump(&addr_strm, nullptr,
Address::DumpStyleModuleWithFileAddress);
error_strm.Printf(
"Address 0x%" PRIx64 " resolves to %s, but there is"
" no source information available for this address.\n",
addr, addr_strm.GetData());
}
} else {
StreamString addr_strm;
so_addr.Dump(&addr_strm, nullptr,
Address::DumpStyleModuleWithFileAddress);
error_strm.Printf("Address 0x%" PRIx64
" resolves to %s, but it cannot"
" be found in any modules.\n",
addr, addr_strm.GetData());
}
} else
error_strm.Printf("Unable to resolve address 0x%" PRIx64 ".\n", addr);
}
return num_matches;
}
// Dump the line entries found in functions matching the name specified in
// the option.
bool DumpLinesInFunctions(CommandReturnObject &result) {
SymbolContextList sc_list_funcs;
ConstString name(m_options.symbol_name.c_str());
SymbolContextList sc_list_lines;
Target *target = m_exe_ctx.GetTargetPtr();
uint32_t addr_byte_size = target->GetArchitecture().GetAddressByteSize();
// Note: module_list can't be const& because FindFunctionSymbols isn't
// const.
ModuleList module_list =
(m_module_list.GetSize() > 0) ? m_module_list : target->GetImages();
size_t num_matches =
module_list.FindFunctions(name, eFunctionNameTypeAuto,
/*include_symbols=*/false,
/*include_inlines=*/true,
/*append=*/true, sc_list_funcs);
if (!num_matches) {
// If we didn't find any functions with that name, try searching for
// symbols that line up exactly with function addresses.
SymbolContextList sc_list_symbols;
size_t num_symbol_matches = module_list.FindFunctionSymbols(
name, eFunctionNameTypeAuto, sc_list_symbols);
for (size_t i = 0; i < num_symbol_matches; i++) {
SymbolContext sc;
sc_list_symbols.GetContextAtIndex(i, sc);
if (sc.symbol && sc.symbol->ValueIsAddress()) {
const Address &base_address = sc.symbol->GetAddressRef();
Function *function = base_address.CalculateSymbolContextFunction();
if (function) {
sc_list_funcs.Append(SymbolContext(function));
num_matches++;
}
}
}
}
if (num_matches == 0) {
result.AppendErrorWithFormat("Could not find function named \'%s\'.\n",
m_options.symbol_name.c_str());
return false;
}
for (size_t i = 0; i < num_matches; i++) {
SymbolContext sc;
sc_list_funcs.GetContextAtIndex(i, sc);
bool context_found_for_symbol = false;
// Loop through all the ranges in the function.
AddressRange range;
for (uint32_t r = 0;
sc.GetAddressRange(eSymbolContextEverything, r,
/*use_inline_block_range=*/true, range);
++r) {
// Append the symbol contexts for each address in the range to
// sc_list_lines.
const Address &base_address = range.GetBaseAddress();
const addr_t size = range.GetByteSize();
lldb::addr_t start_addr = base_address.GetLoadAddress(target);
if (start_addr == LLDB_INVALID_ADDRESS)
start_addr = base_address.GetFileAddress();
lldb::addr_t end_addr = start_addr + size;
for (lldb::addr_t addr = start_addr; addr < end_addr;
addr += addr_byte_size) {
StreamString error_strm;
if (!GetSymbolContextsForAddress(module_list, addr, sc_list_lines,
error_strm))
result.AppendWarningWithFormat("in symbol '%s': %s",
sc.GetFunctionName().AsCString(),
error_strm.GetData());
else
context_found_for_symbol = true;
}
}
if (!context_found_for_symbol)
result.AppendWarningWithFormat("Unable to find line information"
" for matching symbol '%s'.\n",
sc.GetFunctionName().AsCString());
}
if (sc_list_lines.GetSize() == 0) {
result.AppendErrorWithFormat("No line information could be found"
" for any symbols matching '%s'.\n",
name.AsCString());
return false;
}
FileSpec file_spec;
if (!DumpLinesInSymbolContexts(result.GetOutputStream(), sc_list_lines,
module_list, file_spec)) {
result.AppendErrorWithFormat(
"Unable to dump line information for symbol '%s'.\n",
name.AsCString());
return false;
}
return true;
}
// Dump the line entries found for the address specified in the option.
bool DumpLinesForAddress(CommandReturnObject &result) {
Target *target = m_exe_ctx.GetTargetPtr();
SymbolContextList sc_list;
StreamString error_strm;
if (!GetSymbolContextsForAddress(target->GetImages(), m_options.address,
sc_list, error_strm)) {
result.AppendErrorWithFormat("%s.\n", error_strm.GetData());
return false;
}
ModuleList module_list;
FileSpec file_spec;
if (!DumpLinesInSymbolContexts(result.GetOutputStream(), sc_list,
module_list, file_spec)) {
result.AppendErrorWithFormat("No modules contain load address 0x%" PRIx64
".\n",
m_options.address);
return false;
}
return true;
}
// Dump the line entries found in the file specified in the option.
bool DumpLinesForFile(CommandReturnObject &result) {
FileSpec file_spec(m_options.file_name);
const char *filename = m_options.file_name.c_str();
Target *target = m_exe_ctx.GetTargetPtr();
const ModuleList &module_list =
(m_module_list.GetSize() > 0) ? m_module_list : target->GetImages();
bool displayed_something = false;
const size_t num_modules = module_list.GetSize();
for (uint32_t i = 0; i < num_modules; ++i) {
// Dump lines for this module.
Module *module = module_list.GetModulePointerAtIndex(i);
assert(module);
if (DumpFileLinesInModule(result.GetOutputStream(), module, file_spec))
displayed_something = true;
}
if (!displayed_something) {
result.AppendErrorWithFormat("No source filenames matched '%s'.\n",
filename);
return false;
}
return true;
}
// Dump the line entries for the current frame.
bool DumpLinesForFrame(CommandReturnObject &result) {
StackFrame *cur_frame = m_exe_ctx.GetFramePtr();
if (cur_frame == nullptr) {
result.AppendError(
"No selected frame to use to find the default source.");
return false;
} else if (!cur_frame->HasDebugInformation()) {
result.AppendError("No debug info for the selected frame.");
return false;
} else {
const SymbolContext &sc =
cur_frame->GetSymbolContext(eSymbolContextLineEntry);
SymbolContextList sc_list;
sc_list.Append(sc);
ModuleList module_list;
FileSpec file_spec;
if (!DumpLinesInSymbolContexts(result.GetOutputStream(), sc_list,
module_list, file_spec)) {
result.AppendError(
"No source line info available for the selected frame.");
return false;
}
}
return true;
}
bool DoExecute(Args &command, CommandReturnObject &result) override {
const size_t argc = command.GetArgumentCount();
if (argc != 0) {
result.AppendErrorWithFormat("'%s' takes no arguments, only flags.\n",
GetCommandName().str().c_str());
result.SetStatus(eReturnStatusFailed);
return false;
}
Target *target = m_exe_ctx.GetTargetPtr();
if (target == nullptr) {
target = GetDebugger().GetSelectedTarget().get();
if (target == nullptr) {
result.AppendError("invalid target, create a debug target using the "
"'target create' command.");
result.SetStatus(eReturnStatusFailed);
return false;
}
}
uint32_t addr_byte_size = target->GetArchitecture().GetAddressByteSize();
result.GetOutputStream().SetAddressByteSize(addr_byte_size);
result.GetErrorStream().SetAddressByteSize(addr_byte_size);
// Collect the list of modules to search.
m_module_list.Clear();
if (!m_options.modules.empty()) {
for (size_t i = 0, e = m_options.modules.size(); i < e; ++i) {
FileSpec module_file_spec(m_options.modules[i]);
if (module_file_spec) {
ModuleSpec module_spec(module_file_spec);
if (target->GetImages().FindModules(module_spec, m_module_list) == 0)
result.AppendWarningWithFormat("No module found for '%s'.\n",
m_options.modules[i].c_str());
}
}
if (!m_module_list.GetSize()) {
result.AppendError("No modules match the input.");
result.SetStatus(eReturnStatusFailed);
return false;
}
} else if (target->GetImages().GetSize() == 0) {
result.AppendError("The target has no associated executable images.");
result.SetStatus(eReturnStatusFailed);
return false;
}
// Check the arguments to see what lines we should dump.
if (!m_options.symbol_name.empty()) {
// Print lines for symbol.
if (DumpLinesInFunctions(result))
result.SetStatus(eReturnStatusSuccessFinishResult);
else
result.SetStatus(eReturnStatusFailed);
} else if (m_options.address != LLDB_INVALID_ADDRESS) {
// Print lines for an address.
if (DumpLinesForAddress(result))
result.SetStatus(eReturnStatusSuccessFinishResult);
else
result.SetStatus(eReturnStatusFailed);
} else if (!m_options.file_name.empty()) {
// Dump lines for a file.
if (DumpLinesForFile(result))
result.SetStatus(eReturnStatusSuccessFinishResult);
else
result.SetStatus(eReturnStatusFailed);
} else {
// Dump the line for the current frame.
if (DumpLinesForFrame(result))
result.SetStatus(eReturnStatusSuccessFinishResult);
else
result.SetStatus(eReturnStatusFailed);
}
return result.Succeeded();
}
CommandOptions m_options;
ModuleList m_module_list;
};
#pragma mark CommandObjectSourceList
// CommandObjectSourceList
#define LLDB_OPTIONS_source_list
#include "CommandOptions.inc"
class CommandObjectSourceList : public CommandObjectParsed {
class CommandOptions : public Options {
public:
CommandOptions() : Options() {}
~CommandOptions() override = default;
Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_arg,
ExecutionContext *execution_context) override {
Status error;
const int short_option = GetDefinitions()[option_idx].short_option;
switch (short_option) {
case 'l':
if (option_arg.getAsInteger(0, start_line))
error.SetErrorStringWithFormat("invalid line number: '%s'",
option_arg.str().c_str());
break;
case 'c':
if (option_arg.getAsInteger(0, num_lines))
error.SetErrorStringWithFormat("invalid line count: '%s'",
option_arg.str().c_str());
break;
case 'f':
file_name = option_arg;
break;
case 'n':
symbol_name = option_arg;
break;
case 'a': {
address = OptionArgParser::ToAddress(execution_context, option_arg,
LLDB_INVALID_ADDRESS, &error);
} break;
case 's':
modules.push_back(std::string(option_arg));
break;
case 'b':
show_bp_locs = true;
break;
case 'r':
reverse = true;
break;
default:
error.SetErrorStringWithFormat("unrecognized short option '%c'",
short_option);
break;
}
return error;
}
void OptionParsingStarting(ExecutionContext *execution_context) override {
file_spec.Clear();
file_name.clear();
symbol_name.clear();
address = LLDB_INVALID_ADDRESS;
start_line = 0;
num_lines = 0;
show_bp_locs = false;
reverse = false;
modules.clear();
}
llvm::ArrayRef<OptionDefinition> GetDefinitions() override {
return llvm::makeArrayRef(g_source_list_options);
}
// Instance variables to hold the values for command options.
FileSpec file_spec;
std::string file_name;
std::string symbol_name;
lldb::addr_t address;
uint32_t start_line;
uint32_t num_lines;
STLStringArray modules;
bool show_bp_locs;
bool reverse;
};
public:
CommandObjectSourceList(CommandInterpreter &interpreter)
: CommandObjectParsed(interpreter, "source list",
"Display source code for the current target "
"process as specified by options.",
nullptr, eCommandRequiresTarget),
m_options() {}
~CommandObjectSourceList() override = default;
Options *GetOptions() override { return &m_options; }
const char *GetRepeatCommand(Args &current_command_args,
uint32_t index) override {
// This is kind of gross, but the command hasn't been parsed yet so we
// can't look at the option values for this invocation... I have to scan
// the arguments directly.
auto iter =
llvm::find_if(current_command_args, [](const Args::ArgEntry &e) {
return e.ref == "-r" || e.ref == "--reverse";
});
if (iter == current_command_args.end())
return m_cmd_name.c_str();
if (m_reverse_name.empty()) {
m_reverse_name = m_cmd_name;
m_reverse_name.append(" -r");
}
return m_reverse_name.c_str();
}
protected:
struct SourceInfo {
ConstString function;
LineEntry line_entry;
SourceInfo(ConstString name, const LineEntry &line_entry)
: function(name), line_entry(line_entry) {}
SourceInfo() : function(), line_entry() {}
bool IsValid() const { return (bool)function && line_entry.IsValid(); }
bool operator==(const SourceInfo &rhs) const {
return function == rhs.function &&
line_entry.original_file == rhs.line_entry.original_file &&
line_entry.line == rhs.line_entry.line;
}
bool operator!=(const SourceInfo &rhs) const {
return function != rhs.function ||
line_entry.original_file != rhs.line_entry.original_file ||
line_entry.line != rhs.line_entry.line;
}
bool operator<(const SourceInfo &rhs) const {
if (function.GetCString() < rhs.function.GetCString())
return true;
if (line_entry.file.GetDirectory().GetCString() <
rhs.line_entry.file.GetDirectory().GetCString())
return true;
if (line_entry.file.GetFilename().GetCString() <
rhs.line_entry.file.GetFilename().GetCString())
return true;
if (line_entry.line < rhs.line_entry.line)
return true;
return false;
}
};
size_t DisplayFunctionSource(const SymbolContext &sc, SourceInfo &source_info,
CommandReturnObject &result) {
if (!source_info.IsValid()) {
source_info.function = sc.GetFunctionName();
source_info.line_entry = sc.GetFunctionStartLineEntry();
}
if (sc.function) {
Target *target = m_exe_ctx.GetTargetPtr();
FileSpec start_file;
uint32_t start_line;
uint32_t end_line;
FileSpec end_file;
if (sc.block == nullptr) {
// Not an inlined function
sc.function->GetStartLineSourceInfo(start_file, start_line);
if (start_line == 0) {
result.AppendErrorWithFormat("Could not find line information for "
"start of function: \"%s\".\n",
source_info.function.GetCString());
result.SetStatus(eReturnStatusFailed);
return 0;
}
sc.function->GetEndLineSourceInfo(end_file, end_line);
} else {
// We have an inlined function
start_file = source_info.line_entry.file;
start_line = source_info.line_entry.line;
end_line = start_line + m_options.num_lines;
}
// This is a little hacky, but the first line table entry for a function
// points to the "{" that starts the function block. It would be nice to
// actually get the function declaration in there too. So back up a bit,
// but not further than what you're going to display.
uint32_t extra_lines;
if (m_options.num_lines >= 10)
extra_lines = 5;
else
extra_lines = m_options.num_lines / 2;
uint32_t line_no;
if (start_line <= extra_lines)
line_no = 1;
else
line_no = start_line - extra_lines;
// For fun, if the function is shorter than the number of lines we're
// supposed to display, only display the function...
if (end_line != 0) {
if (m_options.num_lines > end_line - line_no)
m_options.num_lines = end_line - line_no + extra_lines;
}
m_breakpoint_locations.Clear();
if (m_options.show_bp_locs) {
const bool show_inlines = true;
m_breakpoint_locations.Reset(start_file, 0, show_inlines);
SearchFilterForUnconstrainedSearches target_search_filter(
m_exe_ctx.GetTargetSP());
target_search_filter.Search(m_breakpoint_locations);
}
result.AppendMessageWithFormat("File: %s\n",
start_file.GetPath().c_str());
// We don't care about the column here.
const uint32_t column = 0;
return target->GetSourceManager().DisplaySourceLinesWithLineNumbers(
start_file, line_no, column, 0, m_options.num_lines, "",
&result.GetOutputStream(), GetBreakpointLocations());
} else {
result.AppendErrorWithFormat(
"Could not find function info for: \"%s\".\n",
m_options.symbol_name.c_str());
}
return 0;
}
// From Jim: The FindMatchingFunctions / FindMatchingFunctionSymbols
// functions "take a possibly empty vector of strings which are names of
// modules, and run the two search functions on the subset of the full module
// list that matches the strings in the input vector". If we wanted to put
// these somewhere, there should probably be a module-filter-list that can be
// passed to the various ModuleList::Find* calls, which would either be a
// vector of string names or a ModuleSpecList.
size_t FindMatchingFunctions(Target *target, ConstString name,
SymbolContextList &sc_list) {
// Displaying the source for a symbol:
bool include_inlines = true;
bool append = true;
bool include_symbols = false;
size_t num_matches = 0;
if (m_options.num_lines == 0)
m_options.num_lines = 10;
const size_t num_modules = m_options.modules.size();
if (num_modules > 0) {
ModuleList matching_modules;
for (size_t i = 0; i < num_modules; ++i) {
FileSpec module_file_spec(m_options.modules[i]);
if (module_file_spec) {
ModuleSpec module_spec(module_file_spec);
matching_modules.Clear();
target->GetImages().FindModules(module_spec, matching_modules);
num_matches += matching_modules.FindFunctions(
name, eFunctionNameTypeAuto, include_symbols, include_inlines,
append, sc_list);
}
}
} else {
num_matches = target->GetImages().FindFunctions(
name, eFunctionNameTypeAuto, include_symbols, include_inlines, append,
sc_list);
}
return num_matches;
}
size_t FindMatchingFunctionSymbols(Target *target, ConstString name,
SymbolContextList &sc_list) {
size_t num_matches = 0;
const size_t num_modules = m_options.modules.size();
if (num_modules > 0) {
ModuleList matching_modules;
for (size_t i = 0; i < num_modules; ++i) {
FileSpec module_file_spec(m_options.modules[i]);
if (module_file_spec) {
ModuleSpec module_spec(module_file_spec);
matching_modules.Clear();
target->GetImages().FindModules(module_spec, matching_modules);
num_matches += matching_modules.FindFunctionSymbols(
name, eFunctionNameTypeAuto, sc_list);
}
}
} else {
num_matches = target->GetImages().FindFunctionSymbols(
name, eFunctionNameTypeAuto, sc_list);
}
return num_matches;
}
bool DoExecute(Args &command, CommandReturnObject &result) override {
const size_t argc = command.GetArgumentCount();
if (argc != 0) {
result.AppendErrorWithFormat("'%s' takes no arguments, only flags.\n",
GetCommandName().str().c_str());
result.SetStatus(eReturnStatusFailed);
return false;
}
Target *target = m_exe_ctx.GetTargetPtr();
if (!m_options.symbol_name.empty()) {
SymbolContextList sc_list;
ConstString name(m_options.symbol_name.c_str());
// Displaying the source for a symbol. Search for function named name.
size_t num_matches = FindMatchingFunctions(target, name, sc_list);
if (!num_matches) {
// If we didn't find any functions with that name, try searching for
// symbols that line up exactly with function addresses.
SymbolContextList sc_list_symbols;
size_t num_symbol_matches =
FindMatchingFunctionSymbols(target, name, sc_list_symbols);
for (size_t i = 0; i < num_symbol_matches; i++) {
SymbolContext sc;
sc_list_symbols.GetContextAtIndex(i, sc);
if (sc.symbol && sc.symbol->ValueIsAddress()) {
const Address &base_address = sc.symbol->GetAddressRef();
Function *function = base_address.CalculateSymbolContextFunction();
if (function) {
sc_list.Append(SymbolContext(function));
num_matches++;
break;
}
}
}
}
if (num_matches == 0) {
result.AppendErrorWithFormat("Could not find function named: \"%s\".\n",
m_options.symbol_name.c_str());
result.SetStatus(eReturnStatusFailed);
return false;
}
if (num_matches > 1) {
std::set<SourceInfo> source_match_set;
bool displayed_something = false;
for (size_t i = 0; i < num_matches; i++) {
SymbolContext sc;
sc_list.GetContextAtIndex(i, sc);
SourceInfo source_info(sc.GetFunctionName(),
sc.GetFunctionStartLineEntry());
if (source_info.IsValid()) {
if (source_match_set.find(source_info) == source_match_set.end()) {
source_match_set.insert(source_info);
if (DisplayFunctionSource(sc, source_info, result))
displayed_something = true;
}
}
}
if (displayed_something)
result.SetStatus(eReturnStatusSuccessFinishResult);
else
result.SetStatus(eReturnStatusFailed);
} else {
SymbolContext sc;
sc_list.GetContextAtIndex(0, sc);
SourceInfo source_info;
if (DisplayFunctionSource(sc, source_info, result)) {
result.SetStatus(eReturnStatusSuccessFinishResult);
} else {
result.SetStatus(eReturnStatusFailed);
}
}
return result.Succeeded();
} else if (m_options.address != LLDB_INVALID_ADDRESS) {
Address so_addr;
StreamString error_strm;
SymbolContextList sc_list;
if (target->GetSectionLoadList().IsEmpty()) {
// The target isn't loaded yet, we need to lookup the file address in
// all modules
const ModuleList &module_list = target->GetImages();
const size_t num_modules = module_list.GetSize();
for (size_t i = 0; i < num_modules; ++i) {
ModuleSP module_sp(module_list.GetModuleAtIndex(i));
if (module_sp &&
module_sp->ResolveFileAddress(m_options.address, so_addr)) {
SymbolContext sc;
sc.Clear(true);
if (module_sp->ResolveSymbolContextForAddress(
so_addr, eSymbolContextEverything, sc) &
eSymbolContextLineEntry)
sc_list.Append(sc);
}
}
if (sc_list.GetSize() == 0) {
result.AppendErrorWithFormat(
"no modules have source information for file address 0x%" PRIx64
".\n",
m_options.address);
result.SetStatus(eReturnStatusFailed);
return false;
}
} else {
// The target has some things loaded, resolve this address to a compile
// unit + file + line and display
if (target->GetSectionLoadList().ResolveLoadAddress(m_options.address,
so_addr)) {
ModuleSP module_sp(so_addr.GetModule());
if (module_sp) {
SymbolContext sc;
sc.Clear(true);
if (module_sp->ResolveSymbolContextForAddress(
so_addr, eSymbolContextEverything, sc) &
eSymbolContextLineEntry) {
sc_list.Append(sc);
} else {
so_addr.Dump(&error_strm, nullptr,
Address::DumpStyleModuleWithFileAddress);
result.AppendErrorWithFormat("address resolves to %s, but there "
"is no line table information "
"available for this address.\n",
error_strm.GetData());
result.SetStatus(eReturnStatusFailed);
return false;
}
}
}
if (sc_list.GetSize() == 0) {
result.AppendErrorWithFormat(
"no modules contain load address 0x%" PRIx64 ".\n",
m_options.address);
result.SetStatus(eReturnStatusFailed);
return false;
}
}
uint32_t num_matches = sc_list.GetSize();
for (uint32_t i = 0; i < num_matches; ++i) {
SymbolContext sc;
sc_list.GetContextAtIndex(i, sc);
if (sc.comp_unit) {
if (m_options.show_bp_locs) {
m_breakpoint_locations.Clear();
const bool show_inlines = true;
m_breakpoint_locations.Reset(*sc.comp_unit, 0, show_inlines);
SearchFilterForUnconstrainedSearches target_search_filter(
target->shared_from_this());
target_search_filter.Search(m_breakpoint_locations);
}
bool show_fullpaths = true;
bool show_module = true;
bool show_inlined_frames = true;
const bool show_function_arguments = true;
const bool show_function_name = true;
sc.DumpStopContext(&result.GetOutputStream(),
m_exe_ctx.GetBestExecutionContextScope(),
sc.line_entry.range.GetBaseAddress(),
show_fullpaths, show_module, show_inlined_frames,
show_function_arguments, show_function_name);
result.GetOutputStream().EOL();
if (m_options.num_lines == 0)
m_options.num_lines = 10;
size_t lines_to_back_up =
m_options.num_lines >= 10 ? 5 : m_options.num_lines / 2;
const uint32_t column =
(GetDebugger().GetStopShowColumn() != eStopShowColumnNone)
? sc.line_entry.column
: 0;
target->GetSourceManager().DisplaySourceLinesWithLineNumbers(
sc.comp_unit, sc.line_entry.line, column, lines_to_back_up,
m_options.num_lines - lines_to_back_up, "->",
&result.GetOutputStream(), GetBreakpointLocations());
result.SetStatus(eReturnStatusSuccessFinishResult);
}
}
} else if (m_options.file_name.empty()) {
// Last valid source manager context, or the current frame if no valid
// last context in source manager. One little trick here, if you type the
// exact same list command twice in a row, it is more likely because you
// typed it once, then typed it again
if (m_options.start_line == 0) {
if (target->GetSourceManager().DisplayMoreWithLineNumbers(
&result.GetOutputStream(), m_options.num_lines,
m_options.reverse, GetBreakpointLocations())) {
result.SetStatus(eReturnStatusSuccessFinishResult);
}
} else {
if (m_options.num_lines == 0)
m_options.num_lines = 10;
if (m_options.show_bp_locs) {
SourceManager::FileSP last_file_sp(
target->GetSourceManager().GetLastFile());
if (last_file_sp) {
const bool show_inlines = true;
m_breakpoint_locations.Reset(last_file_sp->GetFileSpec(), 0,
show_inlines);
SearchFilterForUnconstrainedSearches target_search_filter(
target->shared_from_this());
target_search_filter.Search(m_breakpoint_locations);
}
} else
m_breakpoint_locations.Clear();
const uint32_t column = 0;
if (target->GetSourceManager()
.DisplaySourceLinesWithLineNumbersUsingLastFile(
m_options.start_line, // Line to display
m_options.num_lines, // Lines after line to
UINT32_MAX, // Don't mark "line"
column,
"", // Don't mark "line"
&result.GetOutputStream(), GetBreakpointLocations())) {
result.SetStatus(eReturnStatusSuccessFinishResult);
}
}
} else {
const char *filename = m_options.file_name.c_str();
bool check_inlines = false;
SymbolContextList sc_list;
size_t num_matches = 0;
if (!m_options.modules.empty()) {
ModuleList matching_modules;
for (size_t i = 0, e = m_options.modules.size(); i < e; ++i) {
FileSpec module_file_spec(m_options.modules[i]);
if (module_file_spec) {
ModuleSpec module_spec(module_file_spec);
matching_modules.Clear();
target->GetImages().FindModules(module_spec, matching_modules);
num_matches += matching_modules.ResolveSymbolContextForFilePath(
filename, 0, check_inlines,
SymbolContextItem(eSymbolContextModule |
eSymbolContextCompUnit),
sc_list);
}
}
} else {
num_matches = target->GetImages().ResolveSymbolContextForFilePath(
filename, 0, check_inlines,
eSymbolContextModule | eSymbolContextCompUnit, sc_list);
}
if (num_matches == 0) {
result.AppendErrorWithFormat("Could not find source file \"%s\".\n",
m_options.file_name.c_str());
result.SetStatus(eReturnStatusFailed);
return false;
}
if (num_matches > 1) {
bool got_multiple = false;
FileSpec *test_cu_spec = nullptr;
for (unsigned i = 0; i < num_matches; i++) {
SymbolContext sc;
sc_list.GetContextAtIndex(i, sc);
if (sc.comp_unit) {
if (test_cu_spec) {
if (test_cu_spec != static_cast<FileSpec *>(sc.comp_unit))
got_multiple = true;
break;
} else
test_cu_spec = sc.comp_unit;
}
}
if (got_multiple) {
result.AppendErrorWithFormat(
"Multiple source files found matching: \"%s.\"\n",
m_options.file_name.c_str());
result.SetStatus(eReturnStatusFailed);
return false;
}
}
SymbolContext sc;
if (sc_list.GetContextAtIndex(0, sc)) {
if (sc.comp_unit) {
if (m_options.show_bp_locs) {
const bool show_inlines = true;
m_breakpoint_locations.Reset(*sc.comp_unit, 0, show_inlines);
SearchFilterForUnconstrainedSearches target_search_filter(
target->shared_from_this());
target_search_filter.Search(m_breakpoint_locations);
} else
m_breakpoint_locations.Clear();
if (m_options.num_lines == 0)
m_options.num_lines = 10;
const uint32_t column = 0;
target->GetSourceManager().DisplaySourceLinesWithLineNumbers(
sc.comp_unit, m_options.start_line, column,
0, m_options.num_lines,
"", &result.GetOutputStream(), GetBreakpointLocations());
result.SetStatus(eReturnStatusSuccessFinishResult);
} else {
result.AppendErrorWithFormat("No comp unit found for: \"%s.\"\n",
m_options.file_name.c_str());
result.SetStatus(eReturnStatusFailed);
return false;
}
}
}
return result.Succeeded();
}
const SymbolContextList *GetBreakpointLocations() {
if (m_breakpoint_locations.GetFileLineMatches().GetSize() > 0)
return &m_breakpoint_locations.GetFileLineMatches();
return nullptr;
}
CommandOptions m_options;
FileLineResolver m_breakpoint_locations;
std::string m_reverse_name;
};
#pragma mark CommandObjectMultiwordSource
// CommandObjectMultiwordSource
CommandObjectMultiwordSource::CommandObjectMultiwordSource(
CommandInterpreter &interpreter)
: CommandObjectMultiword(interpreter, "source", "Commands for examining "
"source code described by "
"debug information for the "
"current target process.",
"source <subcommand> [<subcommand-options>]") {
LoadSubCommand("info",
CommandObjectSP(new CommandObjectSourceInfo(interpreter)));
LoadSubCommand("list",
CommandObjectSP(new CommandObjectSourceList(interpreter)));
}
CommandObjectMultiwordSource::~CommandObjectMultiwordSource() = default;
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