1 //===-- CommandObjectArgs.cpp -----------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
12 // Other libraries and framework includes
14 #include "CommandObjectArgs.h"
15 #include "Plugins/ExpressionParser/Clang/ClangExpressionVariable.h"
16 #include "lldb/Core/Debugger.h"
17 #include "lldb/Core/Module.h"
18 #include "lldb/Core/Value.h"
19 #include "lldb/Host/Host.h"
20 #include "lldb/Host/OptionParser.h"
21 #include "lldb/Interpreter/Args.h"
22 #include "lldb/Interpreter/CommandInterpreter.h"
23 #include "lldb/Interpreter/CommandReturnObject.h"
24 #include "lldb/Symbol/ClangASTContext.h"
25 #include "lldb/Symbol/ObjectFile.h"
26 #include "lldb/Symbol/Variable.h"
27 #include "lldb/Target/ABI.h"
28 #include "lldb/Target/Process.h"
29 #include "lldb/Target/StackFrame.h"
30 #include "lldb/Target/Target.h"
31 #include "lldb/Target/Thread.h"
33 #include "llvm/ADT/StringSwitch.h"
36 using namespace lldb_private;
38 // This command is a toy. I'm just using it to have a way to construct the
43 static OptionDefinition g_arg_options[] = {
45 { LLDB_OPT_SET_1, false, "debug", 'g', OptionParser::eNoArgument, nullptr, nullptr, 0, eArgTypeNone, "Enable verbose debug logging of the expression parsing and evaluation." },
49 CommandObjectArgs::CommandOptions::CommandOptions(
50 CommandInterpreter &interpreter)
52 // Keep only one place to reset the values to their defaults
53 OptionParsingStarting(nullptr);
56 CommandObjectArgs::CommandOptions::~CommandOptions() = default;
58 Status CommandObjectArgs::CommandOptions::SetOptionValue(
59 uint32_t option_idx, llvm::StringRef option_arg,
60 ExecutionContext *execution_context) {
63 const int short_option = m_getopt_table[option_idx].val;
64 error.SetErrorStringWithFormat("invalid short option character '%c'",
70 void CommandObjectArgs::CommandOptions::OptionParsingStarting(
71 ExecutionContext *execution_context) {}
73 llvm::ArrayRef<OptionDefinition>
74 CommandObjectArgs::CommandOptions::GetDefinitions() {
75 return llvm::makeArrayRef(g_arg_options);
78 CommandObjectArgs::CommandObjectArgs(CommandInterpreter &interpreter)
79 : CommandObjectParsed(interpreter, "args",
80 "When stopped at the start of a function, reads "
81 "function arguments of type (u?)int(8|16|32|64)_t, "
84 m_options(interpreter) {}
86 CommandObjectArgs::~CommandObjectArgs() = default;
88 Options *CommandObjectArgs::GetOptions() { return &m_options; }
90 bool CommandObjectArgs::DoExecute(Args &args, CommandReturnObject &result) {
91 ConstString target_triple;
93 Process *process = m_exe_ctx.GetProcessPtr();
95 result.AppendError("Args found no process.");
96 result.SetStatus(eReturnStatusFailed);
100 const ABI *abi = process->GetABI().get();
102 result.AppendError("The current process has no ABI.");
103 result.SetStatus(eReturnStatusFailed);
108 result.AppendError("args requires at least one argument");
109 result.SetStatus(eReturnStatusFailed);
113 Thread *thread = m_exe_ctx.GetThreadPtr();
116 result.AppendError("args found no thread.");
117 result.SetStatus(eReturnStatusFailed);
121 lldb::StackFrameSP thread_cur_frame = thread->GetSelectedFrame();
122 if (!thread_cur_frame) {
123 result.AppendError("The current thread has no current frame.");
124 result.SetStatus(eReturnStatusFailed);
128 ModuleSP thread_module_sp(
129 thread_cur_frame->GetFrameCodeAddress().GetModule());
130 if (!thread_module_sp) {
131 result.AppendError("The PC has no associated module.");
132 result.SetStatus(eReturnStatusFailed);
136 TypeSystem *type_system =
137 thread_module_sp->GetTypeSystemForLanguage(eLanguageTypeC);
138 if (type_system == nullptr) {
139 result.AppendError("Unable to create C type system.");
140 result.SetStatus(eReturnStatusFailed);
144 ValueList value_list;
146 for (auto &arg_entry : args.entries()) {
147 llvm::StringRef arg_type = arg_entry.ref;
149 value.SetValueType(Value::eValueTypeScalar);
150 CompilerType compiler_type;
152 std::size_t int_pos = arg_type.find("int");
153 if (int_pos != llvm::StringRef::npos) {
154 Encoding encoding = eEncodingSint;
159 result.AppendErrorWithFormat("Invalid format: %s.\n",
161 result.SetStatus(eReturnStatusFailed);
164 if (int_pos == 1 && arg_type[0] != 'u') {
165 result.AppendErrorWithFormat("Invalid format: %s.\n",
167 result.SetStatus(eReturnStatusFailed);
170 if (arg_type[0] == 'u') {
171 encoding = eEncodingUint;
174 llvm::StringRef width_spec = arg_type.drop_front(int_pos + 3);
176 auto exp_result = llvm::StringSwitch<llvm::Optional<int>>(width_spec)
181 .Default(llvm::None);
182 if (!exp_result.hasValue()) {
183 result.AppendErrorWithFormat("Invalid format: %s.\n",
185 result.SetStatus(eReturnStatusFailed);
191 type_system->GetBuiltinTypeForEncodingAndBitSize(encoding, width);
193 if (!compiler_type.IsValid()) {
194 result.AppendErrorWithFormat(
195 "Couldn't get Clang type for format %s (%s integer, width %d).\n",
197 (encoding == eEncodingSint ? "signed" : "unsigned"), width);
199 result.SetStatus(eReturnStatusFailed);
202 } else if (arg_type == "void*") {
204 type_system->GetBasicTypeFromAST(eBasicTypeVoid).GetPointerType();
205 } else if (arg_type == "char*") {
207 type_system->GetBasicTypeFromAST(eBasicTypeChar).GetPointerType();
209 result.AppendErrorWithFormat("Invalid format: %s.\n", arg_entry.c_str());
210 result.SetStatus(eReturnStatusFailed);
214 value.SetCompilerType(compiler_type);
215 value_list.PushValue(value);
218 if (!abi->GetArgumentValues(*thread, value_list)) {
219 result.AppendError("Couldn't get argument values");
220 result.SetStatus(eReturnStatusFailed);
224 result.GetOutputStream().Printf("Arguments : \n");
226 for (auto entry : llvm::enumerate(args.entries())) {
227 result.GetOutputStream().Printf(
228 "%" PRIu64 " (%s): ", (uint64_t)entry.index(), entry.value().c_str());
229 value_list.GetValueAtIndex(entry.index())->Dump(&result.GetOutputStream());
230 result.GetOutputStream().Printf("\n");
233 return result.Succeeded();