| //===-- CommandObjectExpression.cpp -----------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "CommandObjectExpression.h" |
| |
| // C Includes |
| // C++ Includes |
| // Other libraries and framework includes |
| // Project includes |
| #include "lldb/Interpreter/Args.h" |
| #include "lldb/Core/Value.h" |
| #include "lldb/Core/InputReader.h" |
| #include "lldb/Expression/ClangExpressionVariable.h" |
| #include "lldb/Expression/ClangUserExpression.h" |
| #include "lldb/Expression/ClangFunction.h" |
| #include "lldb/Expression/DWARFExpression.h" |
| #include "lldb/Host/Host.h" |
| #include "lldb/Core/Debugger.h" |
| #include "lldb/Interpreter/CommandInterpreter.h" |
| #include "lldb/Interpreter/CommandReturnObject.h" |
| #include "lldb/Symbol/ObjectFile.h" |
| #include "lldb/Symbol/Variable.h" |
| #include "lldb/Target/Process.h" |
| #include "lldb/Target/StackFrame.h" |
| #include "lldb/Target/Target.h" |
| #include "llvm/ADT/StringRef.h" |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| CommandObjectExpression::CommandOptions::CommandOptions () : |
| Options() |
| { |
| // Keep only one place to reset the values to their defaults |
| ResetOptionValues(); |
| } |
| |
| |
| CommandObjectExpression::CommandOptions::~CommandOptions () |
| { |
| } |
| |
| Error |
| CommandObjectExpression::CommandOptions::SetOptionValue (int option_idx, const char *option_arg) |
| { |
| Error error; |
| |
| char short_option = (char) m_getopt_table[option_idx].val; |
| |
| switch (short_option) |
| { |
| case 'l': |
| if (language.SetLanguageFromCString (option_arg) == false) |
| { |
| error.SetErrorStringWithFormat("Invalid language option argument '%s'.\n", option_arg); |
| } |
| break; |
| |
| case 'g': |
| debug = true; |
| break; |
| |
| case 'f': |
| error = Args::StringToFormat(option_arg, format); |
| break; |
| |
| default: |
| error.SetErrorStringWithFormat("Invalid short option character '%c'.\n", short_option); |
| break; |
| } |
| |
| return error; |
| } |
| |
| void |
| CommandObjectExpression::CommandOptions::ResetOptionValues () |
| { |
| Options::ResetOptionValues(); |
| language.Clear(); |
| debug = false; |
| format = eFormatDefault; |
| show_types = true; |
| show_summary = true; |
| } |
| |
| const lldb::OptionDefinition* |
| CommandObjectExpression::CommandOptions::GetDefinitions () |
| { |
| return g_option_table; |
| } |
| |
| CommandObjectExpression::CommandObjectExpression () : |
| CommandObject ( |
| "expression", |
| "Evaluate a C expression in the current program context, using variables currently in scope.", |
| "expression [<cmd-options>] <expr>"), |
| m_expr_line_count (0), |
| m_expr_lines () |
| { |
| SetHelpLong( |
| "Examples: \n\ |
| \n\ |
| expr my_struct->a = my_array[3] \n\ |
| expr -f bin -- (index * 8) + 5 \n\ |
| expr char c[] = \"foo\"; c[0]\n"); |
| } |
| |
| CommandObjectExpression::~CommandObjectExpression () |
| { |
| } |
| |
| Options * |
| CommandObjectExpression::GetOptions () |
| { |
| return &m_options; |
| } |
| |
| |
| bool |
| CommandObjectExpression::Execute |
| ( |
| CommandInterpreter &interpreter, |
| Args& command, |
| CommandReturnObject &result |
| ) |
| { |
| return false; |
| } |
| |
| |
| size_t |
| CommandObjectExpression::MultiLineExpressionCallback |
| ( |
| void *baton, |
| InputReader &reader, |
| lldb::InputReaderAction notification, |
| const char *bytes, |
| size_t bytes_len |
| ) |
| { |
| CommandObjectExpression *cmd_object_expr = (CommandObjectExpression *) baton; |
| |
| switch (notification) |
| { |
| case eInputReaderActivate: |
| reader.GetDebugger().GetOutputStream().Printf("%s\n", "Enter expressions, then terminate with an empty line to evaluate:"); |
| // Fall through |
| case eInputReaderReactivate: |
| //if (out_fh) |
| // reader.GetDebugger().GetOutputStream().Printf ("%3u: ", cmd_object_expr->m_expr_line_count); |
| break; |
| |
| case eInputReaderDeactivate: |
| break; |
| |
| case eInputReaderGotToken: |
| ++cmd_object_expr->m_expr_line_count; |
| if (bytes && bytes_len) |
| { |
| cmd_object_expr->m_expr_lines.append (bytes, bytes_len + 1); |
| } |
| |
| if (bytes_len == 0) |
| reader.SetIsDone(true); |
| //else if (out_fh && !reader->IsDone()) |
| // ::fprintf (out_fh, "%3u: ", cmd_object_expr->m_expr_line_count); |
| break; |
| |
| case eInputReaderDone: |
| { |
| bool bare = false; |
| cmd_object_expr->EvaluateExpression (cmd_object_expr->m_expr_lines.c_str(), |
| bare, |
| reader.GetDebugger().GetOutputStream(), |
| reader.GetDebugger().GetErrorStream()); |
| } |
| break; |
| } |
| |
| return bytes_len; |
| } |
| |
| bool |
| CommandObjectExpression::EvaluateExpression (const char *expr, bool bare, Stream &output_stream, Stream &error_stream, |
| CommandReturnObject *result) |
| { |
| if (!m_exe_ctx.process) |
| { |
| error_stream.Printf ("Execution context doesn't contain a process\n"); |
| return false; |
| } |
| |
| if (!m_exe_ctx.process->GetDynamicCheckers()) |
| { |
| DynamicCheckerFunctions *dynamic_checkers = new DynamicCheckerFunctions(); |
| |
| StreamString install_errors; |
| |
| if (!dynamic_checkers->Install(install_errors, m_exe_ctx)) |
| { |
| error_stream.Printf("Couldn't install dynamic checkers into the execution context: %s\n", install_errors.GetData()); |
| return false; |
| } |
| |
| m_exe_ctx.process->SetDynamicCheckers(dynamic_checkers); |
| } |
| |
| ClangUserExpression user_expression (expr); |
| |
| if (!user_expression.Parse (error_stream, m_exe_ctx)) |
| { |
| error_stream.Printf ("Couldn't parse the expresssion\n"); |
| return false; |
| } |
| |
| ClangExpressionVariable *expr_result; |
| |
| if (!user_expression.Execute (error_stream, m_exe_ctx, expr_result)) |
| { |
| error_stream.Printf ("Couldn't execute the expresssion\n"); |
| return false; |
| } |
| |
| if (expr_result) |
| { |
| StreamString ss; |
| |
| Error rc = expr_result->Print (ss, |
| m_exe_ctx, |
| m_options.format, |
| m_options.show_types, |
| m_options.show_summary, |
| m_options.debug); |
| |
| if (rc.Fail()) { |
| error_stream.Printf ("Couldn't print result : %s\n", rc.AsCString()); |
| return false; |
| } |
| |
| output_stream.PutCString(ss.GetString().c_str()); |
| if (result) |
| result->SetStatus (eReturnStatusSuccessFinishResult); |
| } |
| else |
| { |
| error_stream.Printf ("Expression produced no result\n"); |
| if (result) |
| result->SetStatus (eReturnStatusSuccessFinishNoResult); |
| } |
| |
| return true; |
| } |
| |
| bool |
| CommandObjectExpression::ExecuteRawCommandString |
| ( |
| CommandInterpreter &interpreter, |
| const char *command, |
| CommandReturnObject &result |
| ) |
| { |
| m_exe_ctx = interpreter.GetDebugger().GetExecutionContext(); |
| |
| m_options.ResetOptionValues(); |
| |
| const char * expr = NULL; |
| |
| if (command[0] == '\0') |
| { |
| m_expr_lines.clear(); |
| m_expr_line_count = 0; |
| |
| InputReaderSP reader_sp (new InputReader(interpreter.GetDebugger())); |
| if (reader_sp) |
| { |
| Error err (reader_sp->Initialize (CommandObjectExpression::MultiLineExpressionCallback, |
| this, // baton |
| eInputReaderGranularityLine, // token size, to pass to callback function |
| NULL, // end token |
| NULL, // prompt |
| true)); // echo input |
| if (err.Success()) |
| { |
| interpreter.GetDebugger().PushInputReader (reader_sp); |
| result.SetStatus (eReturnStatusSuccessFinishNoResult); |
| } |
| else |
| { |
| result.AppendError (err.AsCString()); |
| result.SetStatus (eReturnStatusFailed); |
| } |
| } |
| else |
| { |
| result.AppendError("out of memory"); |
| result.SetStatus (eReturnStatusFailed); |
| } |
| return result.Succeeded(); |
| } |
| |
| if (command[0] == '-') |
| { |
| // We have some options and these options MUST end with --. |
| const char *end_options = NULL; |
| const char *s = command; |
| while (s && s[0]) |
| { |
| end_options = ::strstr (s, "--"); |
| if (end_options) |
| { |
| end_options += 2; // Get past the "--" |
| if (::isspace (end_options[0])) |
| { |
| expr = end_options; |
| while (::isspace (*expr)) |
| ++expr; |
| break; |
| } |
| } |
| s = end_options; |
| } |
| |
| if (end_options) |
| { |
| Args args (command, end_options - command); |
| if (!ParseOptions (interpreter, args, result)) |
| return false; |
| } |
| } |
| |
| if (expr == NULL) |
| expr = command; |
| |
| if (EvaluateExpression (expr, false, result.GetOutputStream(), result.GetErrorStream(), &result)) |
| return true; |
| |
| result.SetStatus (eReturnStatusFailed); |
| return false; |
| } |
| |
| lldb::OptionDefinition |
| CommandObjectExpression::CommandOptions::g_option_table[] = |
| { |
| { LLDB_OPT_SET_ALL, false, "language", 'l', required_argument, NULL, 0, "[c|c++|objc|objc++]", "Sets the language to use when parsing the expression."}, |
| { LLDB_OPT_SET_ALL, false, "format", 'f', required_argument, NULL, 0, "[ [bool|b] | [bin] | [char|c] | [oct|o] | [dec|i|d|u] | [hex|x] | [float|f] | [cstr|s] ]", "Specify the format that the expression output should use."}, |
| { LLDB_OPT_SET_ALL, false, "debug", 'g', no_argument, NULL, 0, NULL, "Enable verbose debug logging of the expression parsing and evaluation."}, |
| { LLDB_OPT_SET_ALL, false, "use-ir", 'i', no_argument, NULL, 0, NULL, "[Temporary] Instructs the expression evaluator to use IR instead of ASTs."}, |
| { 0, false, NULL, 0, 0, NULL, NULL, NULL, NULL } |
| }; |
| |