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

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//===-- CommandObjectExpression.cpp -----------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// C Includes
// C++ Includes
// Other libraries and framework includes
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringRef.h"
// Project includes
#include "CommandObjectExpression.h"
#include "Plugins/ExpressionParser/Clang/ClangExpressionVariable.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Core/Value.h"
#include "lldb/Core/ValueObjectVariable.h"
#include "lldb/DataFormatters/ValueObjectPrinter.h"
#include "lldb/Expression/DWARFExpression.h"
#include "lldb/Expression/REPL.h"
#include "lldb/Expression/UserExpression.h"
#include "lldb/Host/Host.h"
#include "lldb/Host/OptionParser.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/CommandReturnObject.h"
#include "lldb/Interpreter/OptionArgParser.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/Variable.h"
#include "lldb/Target/Language.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/StackFrame.h"
#include "lldb/Target/Target.h"
Centralized a lot of the status information for processes, threads, and stack frame down in the lldb_private::Process, lldb_private::Thread, lldb_private::StackFrameList and the lldb_private::StackFrame classes. We had some command line commands that had duplicate versions of the process status output ("thread list" and "process status" for example). Removed the "file" command and placed it where it should have been: "target create". Made an alias for "file" to "target create" so we stay compatible with GDB commands. We can now have multple usable targets in lldb at the same time. This is nice for comparing two runs of a program or debugging more than one binary at the same time. The new command is "target select <target-idx>" and also to see a list of the current targets you can use the new "target list" command. The flow in a debug session can be: (lldb) target create /path/to/exe/a.out (lldb) breakpoint set --name main (lldb) run ... hit breakpoint (lldb) target create /bin/ls (lldb) run /tmp Process 36001 exited with status = 0 (0x00000000) (lldb) target list Current targets: target #0: /tmp/args/a.out ( arch=x86_64-apple-darwin, platform=localhost, pid=35999, state=stopped ) * target #1: /bin/ls ( arch=x86_64-apple-darwin, platform=localhost, pid=36001, state=exited ) (lldb) target select 0 Current targets: * target #0: /tmp/args/a.out ( arch=x86_64-apple-darwin, platform=localhost, pid=35999, state=stopped ) target #1: /bin/ls ( arch=x86_64-apple-darwin, platform=localhost, pid=36001, state=exited ) (lldb) bt * thread #1: tid = 0x2d03, 0x0000000100000b9a a.out`main + 42 at main.c:16, stop reason = breakpoint 1.1 frame #0: 0x0000000100000b9a a.out`main + 42 at main.c:16 frame #1: 0x0000000100000b64 a.out`start + 52 Above we created a target for "a.out" and ran and hit a breakpoint at "main". Then we created a new target for /bin/ls and ran it. Then we listed the targest and selected our original "a.out" program, so we showed two concurent debug sessions going on at the same time. llvm-svn: 129695
2011-04-18 16:33:37 +08:00
#include "lldb/Target/Thread.h"
using namespace lldb;
using namespace lldb_private;
CommandObjectExpression::CommandOptions::CommandOptions() : OptionGroup() {}
CommandObjectExpression::CommandOptions::~CommandOptions() = default;
static OptionEnumValueElement g_description_verbosity_type[] = {
{eLanguageRuntimeDescriptionDisplayVerbosityCompact, "compact",
"Only show the description string"},
{eLanguageRuntimeDescriptionDisplayVerbosityFull, "full",
"Show the full output, including persistent variable's name and type"},
{0, nullptr, nullptr}};
static OptionDefinition g_expression_options[] = {
// clang-format off
{LLDB_OPT_SET_1 | LLDB_OPT_SET_2, false, "all-threads", 'a', OptionParser::eRequiredArgument, nullptr, nullptr, 0, eArgTypeBoolean, "Should we run all threads if the execution doesn't complete on one thread."},
{LLDB_OPT_SET_1 | LLDB_OPT_SET_2, false, "ignore-breakpoints", 'i', OptionParser::eRequiredArgument, nullptr, nullptr, 0, eArgTypeBoolean, "Ignore breakpoint hits while running expressions"},
{LLDB_OPT_SET_1 | LLDB_OPT_SET_2, false, "timeout", 't', OptionParser::eRequiredArgument, nullptr, nullptr, 0, eArgTypeUnsignedInteger, "Timeout value (in microseconds) for running the expression."},
{LLDB_OPT_SET_1 | LLDB_OPT_SET_2, false, "unwind-on-error", 'u', OptionParser::eRequiredArgument, nullptr, nullptr, 0, eArgTypeBoolean, "Clean up program state if the expression causes a crash, or raises a signal. "
"Note, unlike gdb hitting a breakpoint is controlled by another option (-i)."},
{LLDB_OPT_SET_1 | LLDB_OPT_SET_2, false, "debug", 'g', OptionParser::eNoArgument, nullptr, nullptr, 0, eArgTypeNone, "When specified, debug the JIT code by setting a breakpoint on the first instruction "
"and forcing breakpoints to not be ignored (-i0) and no unwinding to happen on error (-u0)."},
{LLDB_OPT_SET_1 | LLDB_OPT_SET_2, false, "language", 'l', OptionParser::eRequiredArgument, nullptr, nullptr, 0, eArgTypeLanguage, "Specifies the Language to use when parsing the expression. If not set the target.language "
"setting is used." },
{LLDB_OPT_SET_1 | LLDB_OPT_SET_2, false, "apply-fixits", 'X', OptionParser::eRequiredArgument, nullptr, nullptr, 0, eArgTypeLanguage, "If true, simple fix-it hints will be automatically applied to the expression." },
{LLDB_OPT_SET_1, false, "description-verbosity", 'v', OptionParser::eOptionalArgument, nullptr, g_description_verbosity_type, 0, eArgTypeDescriptionVerbosity, "How verbose should the output of this expression be, if the object description is asked for."},
{LLDB_OPT_SET_1 | LLDB_OPT_SET_2, false, "top-level", 'p', OptionParser::eNoArgument, nullptr, nullptr, 0, eArgTypeNone, "Interpret the expression as a complete translation unit, without injecting it into the local "
"context. Allows declaration of persistent, top-level entities without a $ prefix."},
{LLDB_OPT_SET_1 | LLDB_OPT_SET_2, false, "allow-jit", 'j', OptionParser::eRequiredArgument, nullptr, nullptr, 0, eArgTypeBoolean, "Controls whether the expression can fall back to being JITted if it's not supported by "
"the interpreter (defaults to true)."}
// clang-format on
};
Status CommandObjectExpression::CommandOptions::SetOptionValue(
uint32_t option_idx, llvm::StringRef option_arg,
ExecutionContext *execution_context) {
Status error;
const int short_option = GetDefinitions()[option_idx].short_option;
switch (short_option) {
case 'l':
language = Language::GetLanguageTypeFromString(option_arg);
if (language == eLanguageTypeUnknown)
error.SetErrorStringWithFormat(
"unknown language type: '%s' for expression",
option_arg.str().c_str());
break;
case 'a': {
bool success;
bool result;
result = OptionArgParser::ToBoolean(option_arg, true, &success);
if (!success)
error.SetErrorStringWithFormat(
"invalid all-threads value setting: \"%s\"",
option_arg.str().c_str());
else
try_all_threads = result;
} break;
case 'i': {
bool success;
bool tmp_value = OptionArgParser::ToBoolean(option_arg, true, &success);
if (success)
ignore_breakpoints = tmp_value;
else
error.SetErrorStringWithFormat(
"could not convert \"%s\" to a boolean value.",
option_arg.str().c_str());
break;
}
case 'j': {
bool success;
bool tmp_value = OptionArgParser::ToBoolean(option_arg, true, &success);
if (success)
allow_jit = tmp_value;
else
error.SetErrorStringWithFormat(
"could not convert \"%s\" to a boolean value.",
option_arg.str().c_str());
break;
}
case 't':
if (option_arg.getAsInteger(0, timeout)) {
timeout = 0;
error.SetErrorStringWithFormat("invalid timeout setting \"%s\"",
option_arg.str().c_str());
}
break;
case 'u': {
bool success;
bool tmp_value = OptionArgParser::ToBoolean(option_arg, true, &success);
if (success)
unwind_on_error = tmp_value;
else
error.SetErrorStringWithFormat(
"could not convert \"%s\" to a boolean value.",
option_arg.str().c_str());
break;
}
case 'v':
if (option_arg.empty()) {
m_verbosity = eLanguageRuntimeDescriptionDisplayVerbosityFull;
break;
}
m_verbosity = (LanguageRuntimeDescriptionDisplayVerbosity)
OptionArgParser::ToOptionEnum(
option_arg, GetDefinitions()[option_idx].enum_values, 0, error);
if (!error.Success())
error.SetErrorStringWithFormat(
"unrecognized value for description-verbosity '%s'",
option_arg.str().c_str());
break;
case 'g':
debug = true;
unwind_on_error = false;
ignore_breakpoints = false;
break;
case 'p':
top_level = true;
break;
case 'X': {
bool success;
bool tmp_value = OptionArgParser::ToBoolean(option_arg, true, &success);
if (success)
auto_apply_fixits = tmp_value ? eLazyBoolYes : eLazyBoolNo;
else
error.SetErrorStringWithFormat(
"could not convert \"%s\" to a boolean value.",
option_arg.str().c_str());
break;
}
default:
error.SetErrorStringWithFormat("invalid short option character '%c'",
short_option);
break;
}
return error;
}
void CommandObjectExpression::CommandOptions::OptionParsingStarting(
ExecutionContext *execution_context) {
auto process_sp =
execution_context ? execution_context->GetProcessSP() : ProcessSP();
if (process_sp) {
ignore_breakpoints = process_sp->GetIgnoreBreakpointsInExpressions();
unwind_on_error = process_sp->GetUnwindOnErrorInExpressions();
} else {
ignore_breakpoints = true;
unwind_on_error = true;
}
show_summary = true;
try_all_threads = true;
timeout = 0;
debug = false;
language = eLanguageTypeUnknown;
m_verbosity = eLanguageRuntimeDescriptionDisplayVerbosityCompact;
auto_apply_fixits = eLazyBoolCalculate;
top_level = false;
allow_jit = true;
}
llvm::ArrayRef<OptionDefinition>
CommandObjectExpression::CommandOptions::GetDefinitions() {
return llvm::makeArrayRef(g_expression_options);
}
CommandObjectExpression::CommandObjectExpression(
CommandInterpreter &interpreter)
: CommandObjectRaw(
interpreter, "expression", "Evaluate an expression on the current "
"thread. Displays any returned value "
"with LLDB's default formatting.",
"", eCommandProcessMustBePaused | eCommandTryTargetAPILock),
IOHandlerDelegate(IOHandlerDelegate::Completion::Expression),
m_option_group(), m_format_options(eFormatDefault),
m_repl_option(LLDB_OPT_SET_1, false, "repl", 'r', "Drop into REPL", false,
true),
m_command_options(), m_expr_line_count(0), m_expr_lines() {
SetHelpLong(
R"(
Single and multi-line expressions:
)"
" The expression provided on the command line must be a complete expression \
with no newlines. To evaluate a multi-line expression, \
hit a return after an empty expression, and lldb will enter the multi-line expression editor. \
Hit return on an empty line to end the multi-line expression."
R"(
Timeouts:
)"
" If the expression can be evaluated statically (without running code) then it will be. \
Otherwise, by default the expression will run on the current thread with a short timeout: \
currently .25 seconds. If it doesn't return in that time, the evaluation will be interrupted \
and resumed with all threads running. You can use the -a option to disable retrying on all \
threads. You can use the -t option to set a shorter timeout."
R"(
User defined variables:
)"
" You can define your own variables for convenience or to be used in subsequent expressions. \
You define them the same way you would define variables in C. If the first character of \
your user defined variable is a $, then the variable's value will be available in future \
expressions, otherwise it will just be available in the current expression."
R"(
Continuing evaluation after a breakpoint:
)"
" If the \"-i false\" option is used, and execution is interrupted by a breakpoint hit, once \
you are done with your investigation, you can either remove the expression execution frames \
from the stack with \"thread return -x\" or if you are still interested in the expression result \
you can issue the \"continue\" command and the expression evaluation will complete and the \
expression result will be available using the \"thread.completed-expression\" key in the thread \
format."
R"(
Examples:
expr my_struct->a = my_array[3]
expr -f bin -- (index * 8) + 5
expr unsigned int $foo = 5
expr char c[] = \"foo\"; c[0])");
CommandArgumentEntry arg;
CommandArgumentData expression_arg;
// Define the first (and only) variant of this arg.
expression_arg.arg_type = eArgTypeExpression;
expression_arg.arg_repetition = eArgRepeatPlain;
// There is only one variant this argument could be; put it into the argument
// entry.
arg.push_back(expression_arg);
// Push the data for the first argument into the m_arguments vector.
m_arguments.push_back(arg);
// Add the "--format" and "--gdb-format"
m_option_group.Append(&m_format_options,
OptionGroupFormat::OPTION_GROUP_FORMAT |
OptionGroupFormat::OPTION_GROUP_GDB_FMT,
LLDB_OPT_SET_1);
m_option_group.Append(&m_command_options);
m_option_group.Append(&m_varobj_options, LLDB_OPT_SET_ALL,
LLDB_OPT_SET_1 | LLDB_OPT_SET_2);
m_option_group.Append(&m_repl_option, LLDB_OPT_SET_ALL, LLDB_OPT_SET_3);
m_option_group.Finalize();
}
CommandObjectExpression::~CommandObjectExpression() = default;
Options *CommandObjectExpression::GetOptions() { return &m_option_group; }
static lldb_private::Status
CanBeUsedForElementCountPrinting(ValueObject &valobj) {
CompilerType type(valobj.GetCompilerType());
CompilerType pointee;
if (!type.IsPointerType(&pointee))
return Status("as it does not refer to a pointer");
if (pointee.IsVoidType())
return Status("as it refers to a pointer to void");
return Status();
}
bool CommandObjectExpression::EvaluateExpression(llvm::StringRef expr,
Stream *output_stream,
Stream *error_stream,
CommandReturnObject *result) {
// Don't use m_exe_ctx as this might be called asynchronously after the
// command object DoExecute has finished when doing multi-line expression
// that use an input reader...
ExecutionContext exe_ctx(m_interpreter.GetExecutionContext());
Target *target = exe_ctx.GetTargetPtr();
if (!target)
target = GetDummyTarget();
if (target) {
lldb::ValueObjectSP result_valobj_sp;
bool keep_in_memory = true;
StackFrame *frame = exe_ctx.GetFramePtr();
EvaluateExpressionOptions options;
options.SetCoerceToId(m_varobj_options.use_objc);
options.SetUnwindOnError(m_command_options.unwind_on_error);
options.SetIgnoreBreakpoints(m_command_options.ignore_breakpoints);
options.SetKeepInMemory(keep_in_memory);
options.SetUseDynamic(m_varobj_options.use_dynamic);
options.SetTryAllThreads(m_command_options.try_all_threads);
options.SetDebug(m_command_options.debug);
options.SetLanguage(m_command_options.language);
options.SetExecutionPolicy(
m_command_options.allow_jit
? EvaluateExpressionOptions::default_execution_policy
: lldb_private::eExecutionPolicyNever);
bool auto_apply_fixits;
if (m_command_options.auto_apply_fixits == eLazyBoolCalculate)
auto_apply_fixits = target->GetEnableAutoApplyFixIts();
else
auto_apply_fixits =
m_command_options.auto_apply_fixits == eLazyBoolYes ? true : false;
options.SetAutoApplyFixIts(auto_apply_fixits);
if (m_command_options.top_level)
options.SetExecutionPolicy(eExecutionPolicyTopLevel);
// If there is any chance we are going to stop and want to see what went
// wrong with our expression, we should generate debug info
if (!m_command_options.ignore_breakpoints ||
!m_command_options.unwind_on_error)
options.SetGenerateDebugInfo(true);
if (m_command_options.timeout > 0)
options.SetTimeout(std::chrono::microseconds(m_command_options.timeout));
Modified LLDB expressions to not have to JIT and run code just to see variable values or persistent expression variables. Now if an expression consists of a value that is a child of a variable, or of a persistent variable only, we will create a value object for it and make a ValueObjectConstResult from it to freeze the value (for program variables only, not persistent variables) and avoid running JITed code. For everything else we still parse up and JIT code and run it in the inferior. There was also a lot of clean up in the expression code. I made the ClangExpressionVariables be stored in collections of shared pointers instead of in collections of objects. This will help stop a lot of copy constructors on these large objects and also cleans up the code considerably. The persistent clang expression variables were moved over to the Target to ensure they persist across process executions. Added the ability for lldb_private::Target objects to evaluate expressions. We want to evaluate expressions at the target level in case we aren't running yet, or we have just completed running. We still want to be able to access the persistent expression variables between runs, and also evaluate constant expressions. Added extra logging to the dynamic loader plug-in for MacOSX. ModuleList objects can now dump their contents with the UUID, arch and full paths being logged with appropriate prefix values. Thread hardened the Communication class a bit by making the connection auto_ptr member into a shared pointer member and then making a local copy of the shared pointer in each method that uses it to make sure another thread can't nuke the connection object while it is being used by another thread. Added a new file to the lldb/test/load_unload test that causes the test a.out file to link to the libd.dylib file all the time. This will allow us to test using the DYLD_LIBRARY_PATH environment variable after moving libd.dylib somewhere else. llvm-svn: 121745
2010-12-14 10:59:59 +08:00
else
options.SetTimeout(llvm::None);
ExpressionResults success = target->EvaluateExpression(
expr, frame, result_valobj_sp, options, &m_fixed_expression);
// We only tell you about the FixIt if we applied it. The compiler errors
// will suggest the FixIt if it parsed.
if (error_stream && !m_fixed_expression.empty() &&
target->GetEnableNotifyAboutFixIts()) {
if (success == eExpressionCompleted)
error_stream->Printf(
" Fix-it applied, fixed expression was: \n %s\n",
m_fixed_expression.c_str());
}
if (result_valobj_sp) {
Format format = m_format_options.GetFormat();
if (result_valobj_sp->GetError().Success()) {
if (format != eFormatVoid) {
if (format != eFormatDefault)
result_valobj_sp->SetFormat(format);
if (m_varobj_options.elem_count > 0) {
Status error(CanBeUsedForElementCountPrinting(*result_valobj_sp));
if (error.Fail()) {
result->AppendErrorWithFormat(
"expression cannot be used with --element-count %s\n",
error.AsCString(""));
result->SetStatus(eReturnStatusFailed);
return false;
}
}
DumpValueObjectOptions options(m_varobj_options.GetAsDumpOptions(
m_command_options.m_verbosity, format));
options.SetVariableFormatDisplayLanguage(
result_valobj_sp->GetPreferredDisplayLanguage());
result_valobj_sp->Dump(*output_stream, options);
if (result)
result->SetStatus(eReturnStatusSuccessFinishResult);
}
} else {
if (result_valobj_sp->GetError().GetError() ==
UserExpression::kNoResult) {
if (format != eFormatVoid &&
m_interpreter.GetDebugger().GetNotifyVoid()) {
error_stream->PutCString("(void)\n");
}
if (result)
result->SetStatus(eReturnStatusSuccessFinishResult);
} else {
const char *error_cstr = result_valobj_sp->GetError().AsCString();
if (error_cstr && error_cstr[0]) {
const size_t error_cstr_len = strlen(error_cstr);
const bool ends_with_newline =
error_cstr[error_cstr_len - 1] == '\n';
if (strstr(error_cstr, "error:") != error_cstr)
error_stream->PutCString("error: ");
error_stream->Write(error_cstr, error_cstr_len);
if (!ends_with_newline)
error_stream->EOL();
} else {
error_stream->PutCString("error: unknown error\n");
}
if (result)
result->SetStatus(eReturnStatusFailed);
}
}
}
} else {
error_stream->Printf("error: invalid execution context for expression\n");
return false;
}
return true;
}
void CommandObjectExpression::IOHandlerInputComplete(IOHandler &io_handler,
std::string &line) {
io_handler.SetIsDone(true);
// StreamSP output_stream =
// io_handler.GetDebugger().GetAsyncOutputStream();
// StreamSP error_stream = io_handler.GetDebugger().GetAsyncErrorStream();
StreamFileSP output_sp(io_handler.GetOutputStreamFile());
StreamFileSP error_sp(io_handler.GetErrorStreamFile());
EvaluateExpression(line.c_str(), output_sp.get(), error_sp.get());
if (output_sp)
output_sp->Flush();
if (error_sp)
error_sp->Flush();
}
bool CommandObjectExpression::IOHandlerIsInputComplete(IOHandler &io_handler,
StringList &lines) {
// An empty lines is used to indicate the end of input
const size_t num_lines = lines.GetSize();
if (num_lines > 0 && lines[num_lines - 1].empty()) {
// Remove the last empty line from "lines" so it doesn't appear in our
// resulting input and return true to indicate we are done getting lines
lines.PopBack();
return true;
}
return false;
}
void CommandObjectExpression::GetMultilineExpression() {
m_expr_lines.clear();
m_expr_line_count = 0;
Debugger &debugger = GetCommandInterpreter().GetDebugger();
bool color_prompt = debugger.GetUseColor();
const bool multiple_lines = true; // Get multiple lines
IOHandlerSP io_handler_sp(
new IOHandlerEditline(debugger, IOHandler::Type::Expression,
"lldb-expr", // Name of input reader for history
llvm::StringRef(), // No prompt
llvm::StringRef(), // Continuation prompt
multiple_lines, color_prompt,
1, // Show line numbers starting at 1
*this));
StreamFileSP output_sp(io_handler_sp->GetOutputStreamFile());
if (output_sp) {
output_sp->PutCString(
"Enter expressions, then terminate with an empty line to evaluate:\n");
output_sp->Flush();
}
debugger.PushIOHandler(io_handler_sp);
}
bool CommandObjectExpression::DoExecute(llvm::StringRef command,
CommandReturnObject &result) {
m_fixed_expression.clear();
auto exe_ctx = GetCommandInterpreter().GetExecutionContext();
m_option_group.NotifyOptionParsingStarting(&exe_ctx);
if (command.empty()) {
GetMultilineExpression();
return result.Succeeded();
}
OptionsWithRaw args(command);
llvm::StringRef expr = args.GetRawPart();
if (args.HasArgs()) {
if (!ParseOptionsAndNotify(args.GetArgs(), result, m_option_group, exe_ctx))
return false;
if (m_repl_option.GetOptionValue().GetCurrentValue()) {
Target *target = m_interpreter.GetExecutionContext().GetTargetPtr();
if (target) {
// Drop into REPL
m_expr_lines.clear();
m_expr_line_count = 0;
Debugger &debugger = target->GetDebugger();
// Check if the LLDB command interpreter is sitting on top of a REPL
// that launched it...
if (debugger.CheckTopIOHandlerTypes(IOHandler::Type::CommandInterpreter,
IOHandler::Type::REPL)) {
// the LLDB command interpreter is sitting on top of a REPL that
// launched it, so just say the command interpreter is done and
// fall back to the existing REPL
m_interpreter.GetIOHandler(false)->SetIsDone(true);
} else {
// We are launching the REPL on top of the current LLDB command
// interpreter, so just push one
bool initialize = false;
Status repl_error;
REPLSP repl_sp(target->GetREPL(repl_error, m_command_options.language,
nullptr, false));
if (!repl_sp) {
initialize = true;
repl_sp = target->GetREPL(repl_error, m_command_options.language,
nullptr, true);
if (!repl_error.Success()) {
result.SetError(repl_error);
return result.Succeeded();
}
}
if (repl_sp) {
if (initialize) {
repl_sp->SetCommandOptions(m_command_options);
repl_sp->SetFormatOptions(m_format_options);
repl_sp->SetValueObjectDisplayOptions(m_varobj_options);
}
IOHandlerSP io_handler_sp(repl_sp->GetIOHandler());
io_handler_sp->SetIsDone(false);
debugger.PushIOHandler(io_handler_sp);
} else {
repl_error.SetErrorStringWithFormat(
"Couldn't create a REPL for %s",
Language::GetNameForLanguageType(m_command_options.language));
result.SetError(repl_error);
return result.Succeeded();
}
}
}
}
// No expression following options
else if (expr.empty()) {
GetMultilineExpression();
return result.Succeeded();
}
}
Target *target = GetSelectedOrDummyTarget();
if (EvaluateExpression(expr, &(result.GetOutputStream()),
&(result.GetErrorStream()), &result)) {
if (!m_fixed_expression.empty() && target->GetEnableNotifyAboutFixIts()) {
CommandHistory &history = m_interpreter.GetCommandHistory();
// FIXME: Can we figure out what the user actually typed (e.g. some alias
// for expr???)
// If we can it would be nice to show that.
std::string fixed_command("expression ");
if (args.HasArgs()) {
// Add in any options that might have been in the original command:
fixed_command.append(args.GetArgStringWithDelimiter());
fixed_command.append(m_fixed_expression);
} else
fixed_command.append(m_fixed_expression);
history.AppendString(fixed_command);
}
// Increment statistics to record this expression evaluation success.
target->IncrementStats(StatisticKind::ExpressionSuccessful);
return true;
}
// Increment statistics to record this expression evaluation failure.
target->IncrementStats(StatisticKind::ExpressionFailure);
result.SetStatus(eReturnStatusFailed);
return false;
}