xref: /llvm-project/lldb/source/Commands/CommandObjectScripting.cpp (revision 4494c54326fe33d19c14df851188f867b14ded2a)
1 //===-- CommandObjectScripting.cpp ----------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "CommandObjectScripting.h"
10 #include "lldb/Core/Debugger.h"
11 #include "lldb/Core/PluginManager.h"
12 #include "lldb/DataFormatters/DataVisualization.h"
13 #include "lldb/Host/Config.h"
14 #include "lldb/Host/OptionParser.h"
15 #include "lldb/Interpreter/CommandInterpreter.h"
16 #include "lldb/Interpreter/CommandOptionArgumentTable.h"
17 #include "lldb/Interpreter/CommandReturnObject.h"
18 #include "lldb/Interpreter/Interfaces/ScriptedInterfaceUsages.h"
19 #include "lldb/Interpreter/OptionArgParser.h"
20 #include "lldb/Interpreter/ScriptInterpreter.h"
21 #include "lldb/Utility/Args.h"
22 
23 using namespace lldb;
24 using namespace lldb_private;
25 
26 #define LLDB_OPTIONS_scripting_run
27 #include "CommandOptions.inc"
28 
29 class CommandObjectScriptingRun : public CommandObjectRaw {
30 public:
31   CommandObjectScriptingRun(CommandInterpreter &interpreter)
32       : CommandObjectRaw(
33             interpreter, "scripting run",
34             "Invoke the script interpreter with provided code and display any "
35             "results.  Start the interactive interpreter if no code is "
36             "supplied.",
37             "scripting run [--language <scripting-language> --] "
38             "[<script-code>]") {}
39 
40   ~CommandObjectScriptingRun() override = default;
41 
42   Options *GetOptions() override { return &m_options; }
43 
44   class CommandOptions : public Options {
45   public:
46     CommandOptions() = default;
47     ~CommandOptions() override = default;
48     Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_arg,
49                           ExecutionContext *execution_context) override {
50       Status error;
51       const int short_option = m_getopt_table[option_idx].val;
52 
53       switch (short_option) {
54       case 'l':
55         language = (lldb::ScriptLanguage)OptionArgParser::ToOptionEnum(
56             option_arg, GetDefinitions()[option_idx].enum_values,
57             eScriptLanguageNone, error);
58         if (!error.Success())
59           error = Status::FromErrorStringWithFormat(
60               "unrecognized value for language '%s'", option_arg.str().c_str());
61         break;
62       default:
63         llvm_unreachable("Unimplemented option");
64       }
65 
66       return error;
67     }
68 
69     void OptionParsingStarting(ExecutionContext *execution_context) override {
70       language = lldb::eScriptLanguageNone;
71     }
72 
73     llvm::ArrayRef<OptionDefinition> GetDefinitions() override {
74       return llvm::ArrayRef(g_scripting_run_options);
75     }
76 
77     lldb::ScriptLanguage language = lldb::eScriptLanguageNone;
78   };
79 
80 protected:
81   void DoExecute(llvm::StringRef command,
82                  CommandReturnObject &result) override {
83     // Try parsing the language option but when the command contains a raw part
84     // separated by the -- delimiter.
85     OptionsWithRaw raw_args(command);
86     if (raw_args.HasArgs()) {
87       if (!ParseOptions(raw_args.GetArgs(), result))
88         return;
89       command = raw_args.GetRawPart();
90     }
91 
92     lldb::ScriptLanguage language =
93         (m_options.language == lldb::eScriptLanguageNone)
94             ? m_interpreter.GetDebugger().GetScriptLanguage()
95             : m_options.language;
96 
97     if (language == lldb::eScriptLanguageNone) {
98       result.AppendError(
99           "the script-lang setting is set to none - scripting not available");
100       return;
101     }
102 
103     ScriptInterpreter *script_interpreter =
104         GetDebugger().GetScriptInterpreter(true, language);
105 
106     if (script_interpreter == nullptr) {
107       result.AppendError("no script interpreter");
108       return;
109     }
110 
111     // Script might change Python code we use for formatting. Make sure we keep
112     // up to date with it.
113     DataVisualization::ForceUpdate();
114 
115     if (command.empty()) {
116       script_interpreter->ExecuteInterpreterLoop();
117       result.SetStatus(eReturnStatusSuccessFinishNoResult);
118       return;
119     }
120 
121     // We can do better when reporting the status of one-liner script execution.
122     if (script_interpreter->ExecuteOneLine(command, &result))
123       result.SetStatus(eReturnStatusSuccessFinishNoResult);
124     else
125       result.SetStatus(eReturnStatusFailed);
126   }
127 
128 private:
129   CommandOptions m_options;
130 };
131 
132 #define LLDB_OPTIONS_scripting_extension_list
133 #include "CommandOptions.inc"
134 
135 class CommandObjectScriptingExtensionList : public CommandObjectParsed {
136 public:
137   CommandObjectScriptingExtensionList(CommandInterpreter &interpreter)
138       : CommandObjectParsed(
139             interpreter, "scripting extension list",
140             "List all the available scripting extension templates. ",
141             "scripting template list [--language <scripting-language> --]") {}
142 
143   ~CommandObjectScriptingExtensionList() override = default;
144 
145   Options *GetOptions() override { return &m_options; }
146 
147   class CommandOptions : public Options {
148   public:
149     CommandOptions() = default;
150     ~CommandOptions() override = default;
151     Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_arg,
152                           ExecutionContext *execution_context) override {
153       Status error;
154       const int short_option = m_getopt_table[option_idx].val;
155 
156       switch (short_option) {
157       case 'l':
158         m_language = (lldb::ScriptLanguage)OptionArgParser::ToOptionEnum(
159             option_arg, GetDefinitions()[option_idx].enum_values,
160             eScriptLanguageNone, error);
161         if (!error.Success())
162           error = Status::FromErrorStringWithFormatv(
163               "unrecognized value for language '{0}'", option_arg);
164         break;
165       default:
166         llvm_unreachable("Unimplemented option");
167       }
168 
169       return error;
170     }
171 
172     void OptionParsingStarting(ExecutionContext *execution_context) override {
173       m_language = lldb::eScriptLanguageDefault;
174     }
175 
176     llvm::ArrayRef<OptionDefinition> GetDefinitions() override {
177       return llvm::ArrayRef(g_scripting_extension_list_options);
178     }
179 
180     lldb::ScriptLanguage m_language = lldb::eScriptLanguageDefault;
181   };
182 
183 protected:
184   void DoExecute(Args &command, CommandReturnObject &result) override {
185     Stream &s = result.GetOutputStream();
186     s.Printf("Available scripted extension templates:");
187 
188     auto print_field = [&s](llvm::StringRef key, llvm::StringRef value) {
189       if (!value.empty()) {
190         s.IndentMore();
191         s.Indent();
192         s << key << ": " << value << '\n';
193         s.IndentLess();
194       }
195     };
196 
197     size_t num_listed_interface = 0;
198     size_t num_extensions = PluginManager::GetNumScriptedInterfaces();
199     for (size_t i = 0; i < num_extensions; i++) {
200       llvm::StringRef plugin_name =
201           PluginManager::GetScriptedInterfaceNameAtIndex(i);
202       if (plugin_name.empty())
203         break;
204 
205       lldb::ScriptLanguage lang =
206           PluginManager::GetScriptedInterfaceLanguageAtIndex(i);
207       if (lang != m_options.m_language)
208         continue;
209 
210       if (!num_listed_interface)
211         s.EOL();
212 
213       num_listed_interface++;
214 
215       llvm::StringRef desc =
216           PluginManager::GetScriptedInterfaceDescriptionAtIndex(i);
217       ScriptedInterfaceUsages usages =
218           PluginManager::GetScriptedInterfaceUsagesAtIndex(i);
219 
220       print_field("Name", plugin_name);
221       print_field("Language", ScriptInterpreter::LanguageToString(lang));
222       print_field("Description", desc);
223       usages.Dump(s, ScriptedInterfaceUsages::UsageKind::API);
224       usages.Dump(s, ScriptedInterfaceUsages::UsageKind::CommandInterpreter);
225 
226       if (i != num_extensions - 1)
227         s.EOL();
228     }
229 
230     if (!num_listed_interface)
231       s << " None\n";
232   }
233 
234 private:
235   CommandOptions m_options;
236 };
237 
238 class CommandObjectMultiwordScriptingExtension : public CommandObjectMultiword {
239 public:
240   CommandObjectMultiwordScriptingExtension(CommandInterpreter &interpreter)
241       : CommandObjectMultiword(
242             interpreter, "scripting extension",
243             "Commands for operating on the scripting extensions.",
244             "scripting extension [<subcommand-options>]") {
245     LoadSubCommand(
246         "list",
247         CommandObjectSP(new CommandObjectScriptingExtensionList(interpreter)));
248   }
249 
250   ~CommandObjectMultiwordScriptingExtension() override = default;
251 };
252 
253 CommandObjectMultiwordScripting::CommandObjectMultiwordScripting(
254     CommandInterpreter &interpreter)
255     : CommandObjectMultiword(
256           interpreter, "scripting",
257           "Commands for operating on the scripting functionalities.",
258           "scripting <subcommand> [<subcommand-options>]") {
259   LoadSubCommand("run",
260                  CommandObjectSP(new CommandObjectScriptingRun(interpreter)));
261   LoadSubCommand("extension",
262                  CommandObjectSP(new CommandObjectMultiwordScriptingExtension(
263                      interpreter)));
264 }
265 
266 CommandObjectMultiwordScripting::~CommandObjectMultiwordScripting() = default;
267