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

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//===-- CommandObjectThread.cpp -------------------------------------------===//
//
// 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 "CommandObjectThread.h"
#include "lldb/Core/ValueObject.h"
#include "lldb/Host/OptionParser.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/CommandReturnObject.h"
#include "lldb/Interpreter/OptionArgParser.h"
#include "lldb/Interpreter/OptionGroupPythonClassWithDict.h"
#include "lldb/Interpreter/Options.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/Function.h"
#include "lldb/Symbol/LineEntry.h"
#include "lldb/Symbol/LineTable.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/SystemRuntime.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Thread.h"
#include "lldb/Target/ThreadPlan.h"
#include "lldb/Target/ThreadPlanStepInRange.h"
#include "lldb/Utility/State.h"
using namespace lldb;
using namespace lldb_private;
// CommandObjectIterateOverThreads
class CommandObjectIterateOverThreads : public CommandObjectParsed {
class UniqueStack {
public:
UniqueStack(std::stack<lldb::addr_t> stack_frames, uint32_t thread_index_id)
: m_stack_frames(stack_frames) {
m_thread_index_ids.push_back(thread_index_id);
}
void AddThread(uint32_t thread_index_id) const {
m_thread_index_ids.push_back(thread_index_id);
}
const std::vector<uint32_t> &GetUniqueThreadIndexIDs() const {
return m_thread_index_ids;
}
lldb::tid_t GetRepresentativeThread() const {
return m_thread_index_ids.front();
}
friend bool inline operator<(const UniqueStack &lhs,
const UniqueStack &rhs) {
return lhs.m_stack_frames < rhs.m_stack_frames;
}
protected:
// Mark the thread index as mutable, as we don't care about it from a const
// perspective, we only care about m_stack_frames so we keep our std::set
// sorted.
mutable std::vector<uint32_t> m_thread_index_ids;
std::stack<lldb::addr_t> m_stack_frames;
};
public:
CommandObjectIterateOverThreads(CommandInterpreter &interpreter,
const char *name, const char *help,
const char *syntax, uint32_t flags)
: CommandObjectParsed(interpreter, name, help, syntax, flags) {}
~CommandObjectIterateOverThreads() override = default;
bool DoExecute(Args &command, CommandReturnObject &result) override {
result.SetStatus(m_success_return);
bool all_threads = false;
if (command.GetArgumentCount() == 0) {
Thread *thread = m_exe_ctx.GetThreadPtr();
if (!thread || !HandleOneThread(thread->GetID(), result))
return false;
return result.Succeeded();
} else if (command.GetArgumentCount() == 1) {
all_threads = ::strcmp(command.GetArgumentAtIndex(0), "all") == 0;
m_unique_stacks = ::strcmp(command.GetArgumentAtIndex(0), "unique") == 0;
}
// Use tids instead of ThreadSPs to prevent deadlocking problems which
// result from JIT-ing code while iterating over the (locked) ThreadSP
// list.
std::vector<lldb::tid_t> tids;
if (all_threads || m_unique_stacks) {
Process *process = m_exe_ctx.GetProcessPtr();
for (ThreadSP thread_sp : process->Threads())
tids.push_back(thread_sp->GetID());
} else {
const size_t num_args = command.GetArgumentCount();
Process *process = m_exe_ctx.GetProcessPtr();
std::lock_guard<std::recursive_mutex> guard(
process->GetThreadList().GetMutex());
for (size_t i = 0; i < num_args; i++) {
uint32_t thread_idx;
if (!llvm::to_integer(command.GetArgumentAtIndex(i), thread_idx)) {
result.AppendErrorWithFormat("invalid thread specification: \"%s\"\n",
command.GetArgumentAtIndex(i));
result.SetStatus(eReturnStatusFailed);
return false;
}
ThreadSP thread =
process->GetThreadList().FindThreadByIndexID(thread_idx);
if (!thread) {
result.AppendErrorWithFormat("no thread with index: \"%s\"\n",
command.GetArgumentAtIndex(i));
result.SetStatus(eReturnStatusFailed);
return false;
}
tids.push_back(thread->GetID());
}
}
if (m_unique_stacks) {
// Iterate over threads, finding unique stack buckets.
std::set<UniqueStack> unique_stacks;
for (const lldb::tid_t &tid : tids) {
if (!BucketThread(tid, unique_stacks, result)) {
return false;
}
}
// Write the thread id's and unique call stacks to the output stream
Stream &strm = result.GetOutputStream();
Process *process = m_exe_ctx.GetProcessPtr();
for (const UniqueStack &stack : unique_stacks) {
// List the common thread ID's
const std::vector<uint32_t> &thread_index_ids =
stack.GetUniqueThreadIndexIDs();
strm.Format("{0} thread(s) ", thread_index_ids.size());
for (const uint32_t &thread_index_id : thread_index_ids) {
strm.Format("#{0} ", thread_index_id);
}
strm.EOL();
// List the shared call stack for this set of threads
uint32_t representative_thread_id = stack.GetRepresentativeThread();
ThreadSP thread = process->GetThreadList().FindThreadByIndexID(
representative_thread_id);
if (!HandleOneThread(thread->GetID(), result)) {
return false;
}
}
} else {
uint32_t idx = 0;
for (const lldb::tid_t &tid : tids) {
if (idx != 0 && m_add_return)
result.AppendMessage("");
if (!HandleOneThread(tid, result))
return false;
++idx;
}
}
return result.Succeeded();
}
protected:
// Override this to do whatever you need to do for one thread.
//
// If you return false, the iteration will stop, otherwise it will proceed.
// The result is set to m_success_return (defaults to
// eReturnStatusSuccessFinishResult) before the iteration, so you only need
// to set the return status in HandleOneThread if you want to indicate an
// error. If m_add_return is true, a blank line will be inserted between each
// of the listings (except the last one.)
virtual bool HandleOneThread(lldb::tid_t, CommandReturnObject &result) = 0;
bool BucketThread(lldb::tid_t tid, std::set<UniqueStack> &unique_stacks,
CommandReturnObject &result) {
// Grab the corresponding thread for the given thread id.
Process *process = m_exe_ctx.GetProcessPtr();
Thread *thread = process->GetThreadList().FindThreadByID(tid).get();
if (thread == nullptr) {
result.AppendErrorWithFormatv("Failed to process thread #{0}.\n", tid);
result.SetStatus(eReturnStatusFailed);
return false;
}
// Collect the each frame's address for this call-stack
std::stack<lldb::addr_t> stack_frames;
const uint32_t frame_count = thread->GetStackFrameCount();
for (uint32_t frame_index = 0; frame_index < frame_count; frame_index++) {
const lldb::StackFrameSP frame_sp =
thread->GetStackFrameAtIndex(frame_index);
const lldb::addr_t pc = frame_sp->GetStackID().GetPC();
stack_frames.push(pc);
}
uint32_t thread_index_id = thread->GetIndexID();
UniqueStack new_unique_stack(stack_frames, thread_index_id);
// Try to match the threads stack to and existing entry.
std::set<UniqueStack>::iterator matching_stack =
unique_stacks.find(new_unique_stack);
if (matching_stack != unique_stacks.end()) {
matching_stack->AddThread(thread_index_id);
} else {
unique_stacks.insert(new_unique_stack);
}
return true;
}
ReturnStatus m_success_return = eReturnStatusSuccessFinishResult;
bool m_unique_stacks = false;
bool m_add_return = true;
};
// CommandObjectThreadBacktrace
#define LLDB_OPTIONS_thread_backtrace
#include "CommandOptions.inc"
class CommandObjectThreadBacktrace : public CommandObjectIterateOverThreads {
public:
class CommandOptions : public Options {
public:
CommandOptions() : Options() {
// Keep default values of all options in one place: OptionParsingStarting
// ()
OptionParsingStarting(nullptr);
}
~CommandOptions() override = default;
Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_arg,
ExecutionContext *execution_context) override {
Status error;
const int short_option = m_getopt_table[option_idx].val;
switch (short_option) {
case 'c': {
int32_t input_count = 0;
if (option_arg.getAsInteger(0, m_count)) {
m_count = UINT32_MAX;
error.SetErrorStringWithFormat(
"invalid integer value for option '%c'", short_option);
} else if (input_count < 0)
m_count = UINT32_MAX;
} break;
case 's':
if (option_arg.getAsInteger(0, m_start))
error.SetErrorStringWithFormat(
"invalid integer value for option '%c'", short_option);
break;
case 'e': {
bool success;
m_extended_backtrace =
OptionArgParser::ToBoolean(option_arg, false, &success);
if (!success)
error.SetErrorStringWithFormat(
"invalid boolean value for option '%c'", short_option);
} break;
default:
llvm_unreachable("Unimplemented option");
}
return error;
}
void OptionParsingStarting(ExecutionContext *execution_context) override {
m_count = UINT32_MAX;
m_start = 0;
m_extended_backtrace = false;
}
llvm::ArrayRef<OptionDefinition> GetDefinitions() override {
return llvm::makeArrayRef(g_thread_backtrace_options);
}
// Instance variables to hold the values for command options.
uint32_t m_count;
uint32_t m_start;
bool m_extended_backtrace;
};
CommandObjectThreadBacktrace(CommandInterpreter &interpreter)
: CommandObjectIterateOverThreads(
interpreter, "thread backtrace",
"Show thread call stacks. Defaults to the current thread, thread "
"indexes can be specified as arguments.\n"
"Use the thread-index \"all\" to see all threads.\n"
"Use the thread-index \"unique\" to see threads grouped by unique "
"call stacks.\n"
"Use 'settings set frame-format' to customize the printing of "
"frames in the backtrace and 'settings set thread-format' to "
"customize the thread header.",
nullptr,
eCommandRequiresProcess | eCommandRequiresThread |
eCommandTryTargetAPILock | eCommandProcessMustBeLaunched |
eCommandProcessMustBePaused),
m_options() {}
~CommandObjectThreadBacktrace() override = default;
Options *GetOptions() override { return &m_options; }
protected:
void DoExtendedBacktrace(Thread *thread, CommandReturnObject &result) {
SystemRuntime *runtime = thread->GetProcess()->GetSystemRuntime();
if (runtime) {
Stream &strm = result.GetOutputStream();
const std::vector<ConstString> &types =
runtime->GetExtendedBacktraceTypes();
for (auto type : types) {
ThreadSP ext_thread_sp = runtime->GetExtendedBacktraceThread(
thread->shared_from_this(), type);
if (ext_thread_sp && ext_thread_sp->IsValid()) {
const uint32_t num_frames_with_source = 0;
const bool stop_format = false;
if (ext_thread_sp->GetStatus(strm, m_options.m_start,
m_options.m_count,
num_frames_with_source, stop_format)) {
DoExtendedBacktrace(ext_thread_sp.get(), result);
}
}
}
}
}
bool HandleOneThread(lldb::tid_t tid, CommandReturnObject &result) override {
ThreadSP thread_sp =
m_exe_ctx.GetProcessPtr()->GetThreadList().FindThreadByID(tid);
if (!thread_sp) {
result.AppendErrorWithFormat(
"thread disappeared while computing backtraces: 0x%" PRIx64 "\n",
tid);
result.SetStatus(eReturnStatusFailed);
return false;
}
Thread *thread = thread_sp.get();
Stream &strm = result.GetOutputStream();
// Only dump stack info if we processing unique stacks.
const bool only_stacks = m_unique_stacks;
// Don't show source context when doing backtraces.
const uint32_t num_frames_with_source = 0;
const bool stop_format = true;
if (!thread->GetStatus(strm, m_options.m_start, m_options.m_count,
num_frames_with_source, stop_format, only_stacks)) {
result.AppendErrorWithFormat(
"error displaying backtrace for thread: \"0x%4.4x\"\n",
thread->GetIndexID());
result.SetStatus(eReturnStatusFailed);
return false;
}
if (m_options.m_extended_backtrace) {
DoExtendedBacktrace(thread, result);
}
return true;
}
CommandOptions m_options;
};
enum StepScope { eStepScopeSource, eStepScopeInstruction };
static constexpr OptionEnumValueElement g_tri_running_mode[] = {
{eOnlyThisThread, "this-thread", "Run only this thread"},
{eAllThreads, "all-threads", "Run all threads"},
{eOnlyDuringStepping, "while-stepping",
"Run only this thread while stepping"}};
static constexpr OptionEnumValues TriRunningModes() {
return OptionEnumValues(g_tri_running_mode);
}
#define LLDB_OPTIONS_thread_step_scope
#include "CommandOptions.inc"
class ThreadStepScopeOptionGroup : public OptionGroup {
public:
ThreadStepScopeOptionGroup() : OptionGroup() {
// Keep default values of all options in one place: OptionParsingStarting
// ()
OptionParsingStarting(nullptr);
}
~ThreadStepScopeOptionGroup() override = default;
llvm::ArrayRef<OptionDefinition> GetDefinitions() override {
return llvm::makeArrayRef(g_thread_step_scope_options);
}
Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_arg,
ExecutionContext *execution_context) override {
Status error;
const int short_option =
g_thread_step_scope_options[option_idx].short_option;
switch (short_option) {
case 'a': {
bool success;
bool avoid_no_debug =
OptionArgParser::ToBoolean(option_arg, true, &success);
if (!success)
error.SetErrorStringWithFormat("invalid boolean value for option '%c'",
short_option);
else {
m_step_in_avoid_no_debug = avoid_no_debug ? eLazyBoolYes : eLazyBoolNo;
}
} break;
case 'A': {
bool success;
bool avoid_no_debug =
OptionArgParser::ToBoolean(option_arg, true, &success);
if (!success)
error.SetErrorStringWithFormat("invalid boolean value for option '%c'",
short_option);
else {
m_step_out_avoid_no_debug = avoid_no_debug ? eLazyBoolYes : eLazyBoolNo;
}
} break;
case 'c':
if (option_arg.getAsInteger(0, m_step_count))
error.SetErrorStringWithFormat("invalid step count '%s'",
option_arg.str().c_str());
break;
case 'm': {
auto enum_values = GetDefinitions()[option_idx].enum_values;
m_run_mode = (lldb::RunMode)OptionArgParser::ToOptionEnum(
option_arg, enum_values, eOnlyDuringStepping, error);
} break;
case 'e':
if (option_arg == "block") {
m_end_line_is_block_end = true;
break;
}
if (option_arg.getAsInteger(0, m_end_line))
error.SetErrorStringWithFormat("invalid end line number '%s'",
option_arg.str().c_str());
break;
case 'r':
m_avoid_regexp.clear();
m_avoid_regexp.assign(std::string(option_arg));
break;
case 't':
m_step_in_target.clear();
m_step_in_target.assign(std::string(option_arg));
break;
default:
llvm_unreachable("Unimplemented option");
}
return error;
}
void OptionParsingStarting(ExecutionContext *execution_context) override {
m_step_in_avoid_no_debug = eLazyBoolCalculate;
m_step_out_avoid_no_debug = eLazyBoolCalculate;
m_run_mode = eOnlyDuringStepping;
// Check if we are in Non-Stop mode
TargetSP target_sp =
execution_context ? execution_context->GetTargetSP() : TargetSP();
if (target_sp && target_sp->GetNonStopModeEnabled()) {
// NonStopMode runs all threads by definition, so when it is on we don't
// need to check the process setting for runs all threads.
m_run_mode = eOnlyThisThread;
} else {
ProcessSP process_sp =
execution_context ? execution_context->GetProcessSP() : ProcessSP();
if (process_sp && process_sp->GetSteppingRunsAllThreads())
m_run_mode = eAllThreads;
}
m_avoid_regexp.clear();
m_step_in_target.clear();
m_step_count = 1;
m_end_line = LLDB_INVALID_LINE_NUMBER;
m_end_line_is_block_end = false;
}
// Instance variables to hold the values for command options.
LazyBool m_step_in_avoid_no_debug;
LazyBool m_step_out_avoid_no_debug;
RunMode m_run_mode;
std::string m_avoid_regexp;
std::string m_step_in_target;
uint32_t m_step_count;
uint32_t m_end_line;
bool m_end_line_is_block_end;
};
class CommandObjectThreadStepWithTypeAndScope : public CommandObjectParsed {
public:
CommandObjectThreadStepWithTypeAndScope(CommandInterpreter &interpreter,
const char *name, const char *help,
const char *syntax,
StepType step_type,
StepScope step_scope)
: CommandObjectParsed(interpreter, name, help, syntax,
eCommandRequiresProcess | eCommandRequiresThread |
eCommandTryTargetAPILock |
eCommandProcessMustBeLaunched |
eCommandProcessMustBePaused),
m_step_type(step_type), m_step_scope(step_scope), m_options(),
m_class_options("scripted step") {
CommandArgumentEntry arg;
CommandArgumentData thread_id_arg;
// Define the first (and only) variant of this arg.
thread_id_arg.arg_type = eArgTypeThreadID;
thread_id_arg.arg_repetition = eArgRepeatOptional;
// There is only one variant this argument could be; put it into the
// argument entry.
arg.push_back(thread_id_arg);
// Push the data for the first argument into the m_arguments vector.
m_arguments.push_back(arg);
if (step_type == eStepTypeScripted) {
m_all_options.Append(&m_class_options, LLDB_OPT_SET_1 | LLDB_OPT_SET_2,
LLDB_OPT_SET_1);
}
m_all_options.Append(&m_options);
m_all_options.Finalize();
}
~CommandObjectThreadStepWithTypeAndScope() override = default;
void
HandleArgumentCompletion(CompletionRequest &request,
OptionElementVector &opt_element_vector) override {
if (request.GetCursorIndex())
return;
CommandCompletions::InvokeCommonCompletionCallbacks(
GetCommandInterpreter(), CommandCompletions::eThreadIndexCompletion,
request, nullptr);
}
Options *GetOptions() override { return &m_all_options; }
protected:
bool DoExecute(Args &command, CommandReturnObject &result) override {
Process *process = m_exe_ctx.GetProcessPtr();
bool synchronous_execution = m_interpreter.GetSynchronous();
const uint32_t num_threads = process->GetThreadList().GetSize();
Thread *thread = nullptr;
if (command.GetArgumentCount() == 0) {
thread = GetDefaultThread();
if (thread == nullptr) {
result.AppendError("no selected thread in process");
result.SetStatus(eReturnStatusFailed);
return false;
}
} else {
const char *thread_idx_cstr = command.GetArgumentAtIndex(0);
uint32_t step_thread_idx;
if (!llvm::to_integer(thread_idx_cstr, step_thread_idx)) {
result.AppendErrorWithFormat("invalid thread index '%s'.\n",
thread_idx_cstr);
result.SetStatus(eReturnStatusFailed);
return false;
}
thread =
process->GetThreadList().FindThreadByIndexID(step_thread_idx).get();
if (thread == nullptr) {
result.AppendErrorWithFormat(
"Thread index %u is out of range (valid values are 0 - %u).\n",
step_thread_idx, num_threads);
result.SetStatus(eReturnStatusFailed);
return false;
}
}
if (m_step_type == eStepTypeScripted) {
if (m_class_options.GetName().empty()) {
result.AppendErrorWithFormat("empty class name for scripted step.");
result.SetStatus(eReturnStatusFailed);
return false;
} else if (!GetDebugger().GetScriptInterpreter()->CheckObjectExists(
m_class_options.GetName().c_str())) {
result.AppendErrorWithFormat(
"class for scripted step: \"%s\" does not exist.",
m_class_options.GetName().c_str());
result.SetStatus(eReturnStatusFailed);
return false;
}
}
if (m_options.m_end_line != LLDB_INVALID_LINE_NUMBER &&
m_step_type != eStepTypeInto) {
result.AppendErrorWithFormat(
"end line option is only valid for step into");
result.SetStatus(eReturnStatusFailed);
return false;
}
const bool abort_other_plans = false;
const lldb::RunMode stop_other_threads = m_options.m_run_mode;
// This is a bit unfortunate, but not all the commands in this command
// object support only while stepping, so I use the bool for them.
bool bool_stop_other_threads;
if (m_options.m_run_mode == eAllThreads)
bool_stop_other_threads = false;
else if (m_options.m_run_mode == eOnlyDuringStepping)
bool_stop_other_threads = (m_step_type != eStepTypeOut);
else
bool_stop_other_threads = true;
ThreadPlanSP new_plan_sp;
Status new_plan_status;
if (m_step_type == eStepTypeInto) {
StackFrame *frame = thread->GetStackFrameAtIndex(0).get();
assert(frame != nullptr);
if (frame->HasDebugInformation()) {
AddressRange range;
SymbolContext sc = frame->GetSymbolContext(eSymbolContextEverything);
if (m_options.m_end_line != LLDB_INVALID_LINE_NUMBER) {
Status error;
if (!sc.GetAddressRangeFromHereToEndLine(m_options.m_end_line, range,
error)) {
result.AppendErrorWithFormat("invalid end-line option: %s.",
error.AsCString());
result.SetStatus(eReturnStatusFailed);
return false;
}
} else if (m_options.m_end_line_is_block_end) {
Status error;
Block *block = frame->GetSymbolContext(eSymbolContextBlock).block;
if (!block) {
result.AppendErrorWithFormat("Could not find the current block.");
result.SetStatus(eReturnStatusFailed);
return false;
}
AddressRange block_range;
Address pc_address = frame->GetFrameCodeAddress();
block->GetRangeContainingAddress(pc_address, block_range);
if (!block_range.GetBaseAddress().IsValid()) {
result.AppendErrorWithFormat(
"Could not find the current block address.");
result.SetStatus(eReturnStatusFailed);
return false;
}
lldb::addr_t pc_offset_in_block =
pc_address.GetFileAddress() -
block_range.GetBaseAddress().GetFileAddress();
lldb::addr_t range_length =
block_range.GetByteSize() - pc_offset_in_block;
range = AddressRange(pc_address, range_length);
} else {
range = sc.line_entry.range;
}
new_plan_sp = thread->QueueThreadPlanForStepInRange(
abort_other_plans, range,
frame->GetSymbolContext(eSymbolContextEverything),
m_options.m_step_in_target.c_str(), stop_other_threads,
new_plan_status, m_options.m_step_in_avoid_no_debug,
m_options.m_step_out_avoid_no_debug);
if (new_plan_sp && !m_options.m_avoid_regexp.empty()) {
ThreadPlanStepInRange *step_in_range_plan =
static_cast<ThreadPlanStepInRange *>(new_plan_sp.get());
step_in_range_plan->SetAvoidRegexp(m_options.m_avoid_regexp.c_str());
}
} else
new_plan_sp = thread->QueueThreadPlanForStepSingleInstruction(
false, abort_other_plans, bool_stop_other_threads, new_plan_status);
} else if (m_step_type == eStepTypeOver) {
StackFrame *frame = thread->GetStackFrameAtIndex(0).get();
if (frame->HasDebugInformation())
new_plan_sp = thread->QueueThreadPlanForStepOverRange(
abort_other_plans,
frame->GetSymbolContext(eSymbolContextEverything).line_entry,
frame->GetSymbolContext(eSymbolContextEverything),
stop_other_threads, new_plan_status,
m_options.m_step_out_avoid_no_debug);
else
new_plan_sp = thread->QueueThreadPlanForStepSingleInstruction(
true, abort_other_plans, bool_stop_other_threads, new_plan_status);
} else if (m_step_type == eStepTypeTrace) {
new_plan_sp = thread->QueueThreadPlanForStepSingleInstruction(
false, abort_other_plans, bool_stop_other_threads, new_plan_status);
} else if (m_step_type == eStepTypeTraceOver) {
new_plan_sp = thread->QueueThreadPlanForStepSingleInstruction(
true, abort_other_plans, bool_stop_other_threads, new_plan_status);
} else if (m_step_type == eStepTypeOut) {
new_plan_sp = thread->QueueThreadPlanForStepOut(
abort_other_plans, nullptr, false, bool_stop_other_threads, eVoteYes,
eVoteNoOpinion, thread->GetSelectedFrameIndex(), new_plan_status,
m_options.m_step_out_avoid_no_debug);
} else if (m_step_type == eStepTypeScripted) {
new_plan_sp = thread->QueueThreadPlanForStepScripted(
abort_other_plans, m_class_options.GetName().c_str(),
m_class_options.GetStructuredData(), bool_stop_other_threads,
new_plan_status);
} else {
result.AppendError("step type is not supported");
result.SetStatus(eReturnStatusFailed);
return false;
}
// If we got a new plan, then set it to be a master plan (User level Plans
// should be master plans so that they can be interruptible). Then resume
// the process.
if (new_plan_sp) {
new_plan_sp->SetIsMasterPlan(true);
new_plan_sp->SetOkayToDiscard(false);
if (m_options.m_step_count > 1) {
if (!new_plan_sp->SetIterationCount(m_options.m_step_count)) {
result.AppendWarning(
"step operation does not support iteration count.");
}
}
process->GetThreadList().SetSelectedThreadByID(thread->GetID());
const uint32_t iohandler_id = process->GetIOHandlerID();
StreamString stream;
Status error;
if (synchronous_execution)
error = process->ResumeSynchronous(&stream);
else
error = process->Resume();
if (!error.Success()) {
result.AppendMessage(error.AsCString());
result.SetStatus(eReturnStatusFailed);
return false;
}
// There is a race condition where this thread will return up the call
// stack to the main command handler and show an (lldb) prompt before
// HandlePrivateEvent (from PrivateStateThread) has a chance to call
// PushProcessIOHandler().
process->SyncIOHandler(iohandler_id, std::chrono::seconds(2));
if (synchronous_execution) {
// If any state changed events had anything to say, add that to the
// result
if (stream.GetSize() > 0)
result.AppendMessage(stream.GetString());
process->GetThreadList().SetSelectedThreadByID(thread->GetID());
result.SetDidChangeProcessState(true);
result.SetStatus(eReturnStatusSuccessFinishNoResult);
} else {
result.SetStatus(eReturnStatusSuccessContinuingNoResult);
}
} else {
result.SetError(new_plan_status);
result.SetStatus(eReturnStatusFailed);
}
return result.Succeeded();
}
StepType m_step_type;
StepScope m_step_scope;
ThreadStepScopeOptionGroup m_options;
OptionGroupPythonClassWithDict m_class_options;
OptionGroupOptions m_all_options;
};
// CommandObjectThreadContinue
class CommandObjectThreadContinue : public CommandObjectParsed {
public:
CommandObjectThreadContinue(CommandInterpreter &interpreter)
: CommandObjectParsed(
interpreter, "thread continue",
"Continue execution of the current target process. One "
"or more threads may be specified, by default all "
"threads continue.",
nullptr,
eCommandRequiresThread | eCommandTryTargetAPILock |
eCommandProcessMustBeLaunched | eCommandProcessMustBePaused) {
CommandArgumentEntry arg;
CommandArgumentData thread_idx_arg;
// Define the first (and only) variant of this arg.
thread_idx_arg.arg_type = eArgTypeThreadIndex;
thread_idx_arg.arg_repetition = eArgRepeatPlus;
// There is only one variant this argument could be; put it into the
// argument entry.
arg.push_back(thread_idx_arg);
// Push the data for the first argument into the m_arguments vector.
m_arguments.push_back(arg);
}
~CommandObjectThreadContinue() override = default;
void
HandleArgumentCompletion(CompletionRequest &request,
OptionElementVector &opt_element_vector) override {
CommandCompletions::InvokeCommonCompletionCallbacks(
GetCommandInterpreter(), CommandCompletions::eThreadIndexCompletion,
request, nullptr);
}
bool DoExecute(Args &command, CommandReturnObject &result) override {
bool synchronous_execution = m_interpreter.GetSynchronous();
Process *process = m_exe_ctx.GetProcessPtr();
if (process == nullptr) {
result.AppendError("no process exists. Cannot continue");
result.SetStatus(eReturnStatusFailed);
return false;
}
StateType state = process->GetState();
if ((state == eStateCrashed) || (state == eStateStopped) ||
(state == eStateSuspended)) {
const size_t argc = command.GetArgumentCount();
if (argc > 0) {
// These two lines appear at the beginning of both blocks in this
// if..else, but that is because we need to release the lock before
// calling process->Resume below.
std::lock_guard<std::recursive_mutex> guard(
process->GetThreadList().GetMutex());
const uint32_t num_threads = process->GetThreadList().GetSize();
std::vector<Thread *> resume_threads;
for (auto &entry : command.entries()) {
uint32_t thread_idx;
if (entry.ref().getAsInteger(0, thread_idx)) {
result.AppendErrorWithFormat(
"invalid thread index argument: \"%s\".\n", entry.c_str());
result.SetStatus(eReturnStatusFailed);
return false;
}
Thread *thread =
process->GetThreadList().FindThreadByIndexID(thread_idx).get();
if (thread) {
resume_threads.push_back(thread);
} else {
result.AppendErrorWithFormat("invalid thread index %u.\n",
thread_idx);
result.SetStatus(eReturnStatusFailed);
return false;
}
}
if (resume_threads.empty()) {
result.AppendError("no valid thread indexes were specified");
result.SetStatus(eReturnStatusFailed);
return false;
} else {
if (resume_threads.size() == 1)
result.AppendMessageWithFormat("Resuming thread: ");
else
result.AppendMessageWithFormat("Resuming threads: ");
for (uint32_t idx = 0; idx < num_threads; ++idx) {
Thread *thread =
process->GetThreadList().GetThreadAtIndex(idx).get();
std::vector<Thread *>::iterator this_thread_pos =
find(resume_threads.begin(), resume_threads.end(), thread);
if (this_thread_pos != resume_threads.end()) {
resume_threads.erase(this_thread_pos);
if (!resume_threads.empty())
result.AppendMessageWithFormat("%u, ", thread->GetIndexID());
else
result.AppendMessageWithFormat("%u ", thread->GetIndexID());
const bool override_suspend = true;
thread->SetResumeState(eStateRunning, override_suspend);
} else {
thread->SetResumeState(eStateSuspended);
}
}
result.AppendMessageWithFormat("in process %" PRIu64 "\n",
process->GetID());
}
} else {
// These two lines appear at the beginning of both blocks in this
// if..else, but that is because we need to release the lock before
// calling process->Resume below.
std::lock_guard<std::recursive_mutex> guard(
process->GetThreadList().GetMutex());
const uint32_t num_threads = process->GetThreadList().GetSize();
Thread *current_thread = GetDefaultThread();
if (current_thread == nullptr) {
result.AppendError("the process doesn't have a current thread");
result.SetStatus(eReturnStatusFailed);
return false;
}
// Set the actions that the threads should each take when resuming
for (uint32_t idx = 0; idx < num_threads; ++idx) {
Thread *thread = process->GetThreadList().GetThreadAtIndex(idx).get();
if (thread == current_thread) {
result.AppendMessageWithFormat("Resuming thread 0x%4.4" PRIx64
" in process %" PRIu64 "\n",
thread->GetID(), process->GetID());
const bool override_suspend = true;
thread->SetResumeState(eStateRunning, override_suspend);
} else {
thread->SetResumeState(eStateSuspended);
}
}
}
StreamString stream;
Status error;
if (synchronous_execution)
error = process->ResumeSynchronous(&stream);
else
error = process->Resume();
// We should not be holding the thread list lock when we do this.
if (error.Success()) {
result.AppendMessageWithFormat("Process %" PRIu64 " resuming\n",
process->GetID());
if (synchronous_execution) {
// If any state changed events had anything to say, add that to the
// result
if (stream.GetSize() > 0)
result.AppendMessage(stream.GetString());
result.SetDidChangeProcessState(true);
result.SetStatus(eReturnStatusSuccessFinishNoResult);
} else {
result.SetStatus(eReturnStatusSuccessContinuingNoResult);
}
} else {
result.AppendErrorWithFormat("Failed to resume process: %s\n",
error.AsCString());
result.SetStatus(eReturnStatusFailed);
}
} else {
result.AppendErrorWithFormat(
"Process cannot be continued from its current state (%s).\n",
StateAsCString(state));
result.SetStatus(eReturnStatusFailed);
}
return result.Succeeded();
}
};
// CommandObjectThreadUntil
static constexpr OptionEnumValueElement g_duo_running_mode[] = {
{eOnlyThisThread, "this-thread", "Run only this thread"},
{eAllThreads, "all-threads", "Run all threads"}};
static constexpr OptionEnumValues DuoRunningModes() {
return OptionEnumValues(g_duo_running_mode);
}
#define LLDB_OPTIONS_thread_until
#include "CommandOptions.inc"
class CommandObjectThreadUntil : public CommandObjectParsed {
public:
class CommandOptions : public Options {
public:
uint32_t m_thread_idx;
uint32_t m_frame_idx;
CommandOptions()
: Options(), m_thread_idx(LLDB_INVALID_THREAD_ID),
m_frame_idx(LLDB_INVALID_FRAME_ID) {
// Keep default values of all options in one place: OptionParsingStarting
// ()
OptionParsingStarting(nullptr);
}
~CommandOptions() override = default;
Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_arg,
ExecutionContext *execution_context) override {
Status error;
const int short_option = m_getopt_table[option_idx].val;
switch (short_option) {
case 'a': {
lldb::addr_t tmp_addr = OptionArgParser::ToAddress(
execution_context, option_arg, LLDB_INVALID_ADDRESS, &error);
if (error.Success())
m_until_addrs.push_back(tmp_addr);
} break;
case 't':
if (option_arg.getAsInteger(0, m_thread_idx)) {
m_thread_idx = LLDB_INVALID_INDEX32;
error.SetErrorStringWithFormat("invalid thread index '%s'",
option_arg.str().c_str());
}
break;
case 'f':
if (option_arg.getAsInteger(0, m_frame_idx)) {
m_frame_idx = LLDB_INVALID_FRAME_ID;
error.SetErrorStringWithFormat("invalid frame index '%s'",
option_arg.str().c_str());
}
break;
case 'm': {
auto enum_values = GetDefinitions()[option_idx].enum_values;
lldb::RunMode run_mode = (lldb::RunMode)OptionArgParser::ToOptionEnum(
option_arg, enum_values, eOnlyDuringStepping, error);
if (error.Success()) {
if (run_mode == eAllThreads)
m_stop_others = false;
else
m_stop_others = true;
}
} break;
default:
llvm_unreachable("Unimplemented option");
}
return error;
}
void OptionParsingStarting(ExecutionContext *execution_context) override {
m_thread_idx = LLDB_INVALID_THREAD_ID;
m_frame_idx = 0;
m_stop_others = false;
m_until_addrs.clear();
}
llvm::ArrayRef<OptionDefinition> GetDefinitions() override {
return llvm::makeArrayRef(g_thread_until_options);
}
uint32_t m_step_thread_idx;
bool m_stop_others;
std::vector<lldb::addr_t> m_until_addrs;
// Instance variables to hold the values for command options.
};
CommandObjectThreadUntil(CommandInterpreter &interpreter)
: CommandObjectParsed(
interpreter, "thread until",
"Continue until a line number or address is reached by the "
"current or specified thread. Stops when returning from "
"the current function as a safety measure. "
"The target line number(s) are given as arguments, and if more "
"than one"
" is provided, stepping will stop when the first one is hit.",
nullptr,
eCommandRequiresThread | eCommandTryTargetAPILock |
eCommandProcessMustBeLaunched | eCommandProcessMustBePaused),
m_options() {
CommandArgumentEntry arg;
CommandArgumentData line_num_arg;
// Define the first (and only) variant of this arg.
line_num_arg.arg_type = eArgTypeLineNum;
line_num_arg.arg_repetition = eArgRepeatPlain;
// There is only one variant this argument could be; put it into the
// argument entry.
arg.push_back(line_num_arg);
// Push the data for the first argument into the m_arguments vector.
m_arguments.push_back(arg);
}
~CommandObjectThreadUntil() override = default;
Options *GetOptions() override { return &m_options; }
protected:
bool DoExecute(Args &command, CommandReturnObject &result) override {
bool synchronous_execution = m_interpreter.GetSynchronous();
Target *target = &GetSelectedTarget();
Process *process = m_exe_ctx.GetProcessPtr();
if (process == nullptr) {
result.AppendError("need a valid process to step");
result.SetStatus(eReturnStatusFailed);
} else {
Thread *thread = nullptr;
std::vector<uint32_t> line_numbers;
if (command.GetArgumentCount() >= 1) {
size_t num_args = command.GetArgumentCount();
for (size_t i = 0; i < num_args; i++) {
uint32_t line_number;
if (!llvm::to_integer(command.GetArgumentAtIndex(i), line_number)) {
result.AppendErrorWithFormat("invalid line number: '%s'.\n",
command.GetArgumentAtIndex(i));
result.SetStatus(eReturnStatusFailed);
return false;
} else
line_numbers.push_back(line_number);
}
} else if (m_options.m_until_addrs.empty()) {
result.AppendErrorWithFormat("No line number or address provided:\n%s",
GetSyntax().str().c_str());
result.SetStatus(eReturnStatusFailed);
return false;
}
if (m_options.m_thread_idx == LLDB_INVALID_THREAD_ID) {
thread = GetDefaultThread();
} else {
thread = process->GetThreadList()
.FindThreadByIndexID(m_options.m_thread_idx)
.get();
}
if (thread == nullptr) {
const uint32_t num_threads = process->GetThreadList().GetSize();
result.AppendErrorWithFormat(
"Thread index %u is out of range (valid values are 0 - %u).\n",
m_options.m_thread_idx, num_threads);
result.SetStatus(eReturnStatusFailed);
return false;
}
const bool abort_other_plans = false;
StackFrame *frame =
thread->GetStackFrameAtIndex(m_options.m_frame_idx).get();
if (frame == nullptr) {
result.AppendErrorWithFormat(
"Frame index %u is out of range for thread %u.\n",
m_options.m_frame_idx, m_options.m_thread_idx);
result.SetStatus(eReturnStatusFailed);
return false;
}
ThreadPlanSP new_plan_sp;
Status new_plan_status;
if (frame->HasDebugInformation()) {
// Finally we got here... Translate the given line number to a bunch
// of addresses:
SymbolContext sc(frame->GetSymbolContext(eSymbolContextCompUnit));
LineTable *line_table = nullptr;
if (sc.comp_unit)
line_table = sc.comp_unit->GetLineTable();
if (line_table == nullptr) {
result.AppendErrorWithFormat("Failed to resolve the line table for "
"frame %u of thread index %u.\n",
m_options.m_frame_idx,
m_options.m_thread_idx);
result.SetStatus(eReturnStatusFailed);
return false;
}
LineEntry function_start;
uint32_t index_ptr = 0, end_ptr;
std::vector<addr_t> address_list;
// Find the beginning & end index of the
AddressRange fun_addr_range = sc.function->GetAddressRange();
Address fun_start_addr = fun_addr_range.GetBaseAddress();
line_table->FindLineEntryByAddress(fun_start_addr, function_start,
&index_ptr);
Address fun_end_addr(fun_start_addr.GetSection(),
fun_start_addr.GetOffset() +
fun_addr_range.GetByteSize());
bool all_in_function = true;
line_table->FindLineEntryByAddress(fun_end_addr, function_start,
&end_ptr);
for (uint32_t line_number : line_numbers) {
uint32_t start_idx_ptr = index_ptr;
while (start_idx_ptr <= end_ptr) {
LineEntry line_entry;
const bool exact = false;
start_idx_ptr = sc.comp_unit->FindLineEntry(
start_idx_ptr, line_number, nullptr, exact, &line_entry);
if (start_idx_ptr == UINT32_MAX)
break;
addr_t address =
line_entry.range.GetBaseAddress().GetLoadAddress(target);
if (address != LLDB_INVALID_ADDRESS) {
if (fun_addr_range.ContainsLoadAddress(address, target))
address_list.push_back(address);
else
all_in_function = false;
}
start_idx_ptr++;
}
}
for (lldb::addr_t address : m_options.m_until_addrs) {
if (fun_addr_range.ContainsLoadAddress(address, target))
address_list.push_back(address);
else
all_in_function = false;
}
if (address_list.empty()) {
if (all_in_function)
result.AppendErrorWithFormat(
"No line entries matching until target.\n");
else
result.AppendErrorWithFormat(
"Until target outside of the current function.\n");
result.SetStatus(eReturnStatusFailed);
return false;
}
new_plan_sp = thread->QueueThreadPlanForStepUntil(
abort_other_plans, &address_list.front(), address_list.size(),
m_options.m_stop_others, m_options.m_frame_idx, new_plan_status);
if (new_plan_sp) {
// User level plans should be master plans so they can be interrupted
// (e.g. by hitting a breakpoint) and other plans executed by the
// user (stepping around the breakpoint) and then a "continue" will
// resume the original plan.
new_plan_sp->SetIsMasterPlan(true);
new_plan_sp->SetOkayToDiscard(false);
} else {
result.SetError(new_plan_status);
result.SetStatus(eReturnStatusFailed);
return false;
}
} else {
result.AppendErrorWithFormat(
"Frame index %u of thread %u has no debug information.\n",
m_options.m_frame_idx, m_options.m_thread_idx);
result.SetStatus(eReturnStatusFailed);
return false;
}
process->GetThreadList().SetSelectedThreadByID(m_options.m_thread_idx);
StreamString stream;
Status error;
if (synchronous_execution)
error = process->ResumeSynchronous(&stream);
else
error = process->Resume();
if (error.Success()) {
result.AppendMessageWithFormat("Process %" PRIu64 " resuming\n",
process->GetID());
if (synchronous_execution) {
// If any state changed events had anything to say, add that to the
// result
if (stream.GetSize() > 0)
result.AppendMessage(stream.GetString());
result.SetDidChangeProcessState(true);
result.SetStatus(eReturnStatusSuccessFinishNoResult);
} else {
result.SetStatus(eReturnStatusSuccessContinuingNoResult);
}
} else {
result.AppendErrorWithFormat("Failed to resume process: %s.\n",
error.AsCString());
result.SetStatus(eReturnStatusFailed);
}
}
return result.Succeeded();
}
CommandOptions m_options;
};
// CommandObjectThreadSelect
class CommandObjectThreadSelect : public CommandObjectParsed {
public:
CommandObjectThreadSelect(CommandInterpreter &interpreter)
: CommandObjectParsed(interpreter, "thread select",
"Change the currently selected thread.", nullptr,
eCommandRequiresProcess | eCommandTryTargetAPILock |
eCommandProcessMustBeLaunched |
eCommandProcessMustBePaused) {
CommandArgumentEntry arg;
CommandArgumentData thread_idx_arg;
// Define the first (and only) variant of this arg.
thread_idx_arg.arg_type = eArgTypeThreadIndex;
thread_idx_arg.arg_repetition = eArgRepeatPlain;
// There is only one variant this argument could be; put it into the
// argument entry.
arg.push_back(thread_idx_arg);
// Push the data for the first argument into the m_arguments vector.
m_arguments.push_back(arg);
}
~CommandObjectThreadSelect() override = default;
void
HandleArgumentCompletion(CompletionRequest &request,
OptionElementVector &opt_element_vector) override {
if (request.GetCursorIndex())
return;
CommandCompletions::InvokeCommonCompletionCallbacks(
GetCommandInterpreter(), CommandCompletions::eThreadIndexCompletion,
request, nullptr);
}
protected:
bool DoExecute(Args &command, CommandReturnObject &result) override {
Process *process = m_exe_ctx.GetProcessPtr();
if (process == nullptr) {
result.AppendError("no process");
result.SetStatus(eReturnStatusFailed);
return false;
} else if (command.GetArgumentCount() != 1) {
result.AppendErrorWithFormat(
"'%s' takes exactly one thread index argument:\nUsage: %s\n",
m_cmd_name.c_str(), m_cmd_syntax.c_str());
result.SetStatus(eReturnStatusFailed);
return false;
}
uint32_t index_id;
if (!llvm::to_integer(command.GetArgumentAtIndex(0), index_id)) {
result.AppendErrorWithFormat("Invalid thread index '%s'",
command.GetArgumentAtIndex(0));
result.SetStatus(eReturnStatusFailed);
return false;
}
Thread *new_thread =
process->GetThreadList().FindThreadByIndexID(index_id).get();
if (new_thread == nullptr) {
result.AppendErrorWithFormat("invalid thread #%s.\n",
command.GetArgumentAtIndex(0));
result.SetStatus(eReturnStatusFailed);
return false;
}
process->GetThreadList().SetSelectedThreadByID(new_thread->GetID(), true);
result.SetStatus(eReturnStatusSuccessFinishNoResult);
return result.Succeeded();
}
};
// CommandObjectThreadList
class CommandObjectThreadList : public CommandObjectParsed {
public:
CommandObjectThreadList(CommandInterpreter &interpreter)
: CommandObjectParsed(
interpreter, "thread list",
"Show a summary of each thread in the current target process. "
"Use 'settings set thread-format' to customize the individual "
"thread listings.",
"thread list",
eCommandRequiresProcess | eCommandTryTargetAPILock |
eCommandProcessMustBeLaunched | eCommandProcessMustBePaused) {}
~CommandObjectThreadList() override = default;
protected:
bool DoExecute(Args &command, CommandReturnObject &result) override {
Stream &strm = result.GetOutputStream();
result.SetStatus(eReturnStatusSuccessFinishNoResult);
Process *process = m_exe_ctx.GetProcessPtr();
const bool only_threads_with_stop_reason = false;
const uint32_t start_frame = 0;
const uint32_t num_frames = 0;
const uint32_t num_frames_with_source = 0;
process->GetStatus(strm);
process->GetThreadStatus(strm, only_threads_with_stop_reason, start_frame,
num_frames, num_frames_with_source, false);
return result.Succeeded();
}
};
// CommandObjectThreadInfo
#define LLDB_OPTIONS_thread_info
#include "CommandOptions.inc"
class CommandObjectThreadInfo : public CommandObjectIterateOverThreads {
public:
class CommandOptions : public Options {
public:
CommandOptions() : Options() { OptionParsingStarting(nullptr); }
~CommandOptions() override = default;
void OptionParsingStarting(ExecutionContext *execution_context) override {
m_json_thread = false;
m_json_stopinfo = false;
}
Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_arg,
ExecutionContext *execution_context) override {
const int short_option = m_getopt_table[option_idx].val;
Status error;
switch (short_option) {
case 'j':
m_json_thread = true;
break;
case 's':
m_json_stopinfo = true;
break;
default:
llvm_unreachable("Unimplemented option");
}
return error;
}
llvm::ArrayRef<OptionDefinition> GetDefinitions() override {
return llvm::makeArrayRef(g_thread_info_options);
}
bool m_json_thread;
bool m_json_stopinfo;
};
CommandObjectThreadInfo(CommandInterpreter &interpreter)
: CommandObjectIterateOverThreads(
interpreter, "thread info",
"Show an extended summary of one or "
"more threads. Defaults to the "
"current thread.",
"thread info",
eCommandRequiresProcess | eCommandTryTargetAPILock |
eCommandProcessMustBeLaunched | eCommandProcessMustBePaused),
m_options() {
m_add_return = false;
}
~CommandObjectThreadInfo() override = default;
void
HandleArgumentCompletion(CompletionRequest &request,
OptionElementVector &opt_element_vector) override {
CommandCompletions::InvokeCommonCompletionCallbacks(
GetCommandInterpreter(), CommandCompletions::eThreadIndexCompletion,
request, nullptr);
}
Options *GetOptions() override { return &m_options; }
bool HandleOneThread(lldb::tid_t tid, CommandReturnObject &result) override {
ThreadSP thread_sp =
m_exe_ctx.GetProcessPtr()->GetThreadList().FindThreadByID(tid);
if (!thread_sp) {
result.AppendErrorWithFormat("thread no longer exists: 0x%" PRIx64 "\n",
tid);
result.SetStatus(eReturnStatusFailed);
return false;
}
Thread *thread = thread_sp.get();
Stream &strm = result.GetOutputStream();
if (!thread->GetDescription(strm, eDescriptionLevelFull,
m_options.m_json_thread,
m_options.m_json_stopinfo)) {
result.AppendErrorWithFormat("error displaying info for thread: \"%d\"\n",
thread->GetIndexID());
result.SetStatus(eReturnStatusFailed);
return false;
}
return true;
}
CommandOptions m_options;
};
// CommandObjectThreadException
class CommandObjectThreadException : public CommandObjectIterateOverThreads {
public:
CommandObjectThreadException(CommandInterpreter &interpreter)
: CommandObjectIterateOverThreads(
interpreter, "thread exception",
"Display the current exception object for a thread. Defaults to "
"the current thread.",
"thread exception",
eCommandRequiresProcess | eCommandTryTargetAPILock |
eCommandProcessMustBeLaunched | eCommandProcessMustBePaused) {}
~CommandObjectThreadException() override = default;
void
HandleArgumentCompletion(CompletionRequest &request,
OptionElementVector &opt_element_vector) override {
CommandCompletions::InvokeCommonCompletionCallbacks(
GetCommandInterpreter(), CommandCompletions::eThreadIndexCompletion,
request, nullptr);
}
bool HandleOneThread(lldb::tid_t tid, CommandReturnObject &result) override {
ThreadSP thread_sp =
m_exe_ctx.GetProcessPtr()->GetThreadList().FindThreadByID(tid);
if (!thread_sp) {
result.AppendErrorWithFormat("thread no longer exists: 0x%" PRIx64 "\n",
tid);
result.SetStatus(eReturnStatusFailed);
return false;
}
Stream &strm = result.GetOutputStream();
ValueObjectSP exception_object_sp = thread_sp->GetCurrentException();
if (exception_object_sp) {
exception_object_sp->Dump(strm);
}
ThreadSP exception_thread_sp = thread_sp->GetCurrentExceptionBacktrace();
if (exception_thread_sp && exception_thread_sp->IsValid()) {
const uint32_t num_frames_with_source = 0;
const bool stop_format = false;
exception_thread_sp->GetStatus(strm, 0, UINT32_MAX,
num_frames_with_source, stop_format);
}
return true;
}
};
// CommandObjectThreadReturn
#define LLDB_OPTIONS_thread_return
#include "CommandOptions.inc"
class CommandObjectThreadReturn : public CommandObjectRaw {
public:
class CommandOptions : public Options {
public:
CommandOptions() : Options(), m_from_expression(false) {
// Keep default values of all options in one place: OptionParsingStarting
// ()
OptionParsingStarting(nullptr);
}
~CommandOptions() override = default;
Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_arg,
ExecutionContext *execution_context) override {
Status error;
const int short_option = m_getopt_table[option_idx].val;
switch (short_option) {
case 'x': {
bool success;
bool tmp_value =
OptionArgParser::ToBoolean(option_arg, false, &success);
if (success)
m_from_expression = tmp_value;
else {
error.SetErrorStringWithFormat(
"invalid boolean value '%s' for 'x' option",
option_arg.str().c_str());
}
} break;
default:
llvm_unreachable("Unimplemented option");
}
return error;
}
void OptionParsingStarting(ExecutionContext *execution_context) override {
m_from_expression = false;
}
llvm::ArrayRef<OptionDefinition> GetDefinitions() override {
return llvm::makeArrayRef(g_thread_return_options);
}
bool m_from_expression;
// Instance variables to hold the values for command options.
};
CommandObjectThreadReturn(CommandInterpreter &interpreter)
: CommandObjectRaw(interpreter, "thread return",
"Prematurely return from a stack frame, "
"short-circuiting execution of newer frames "
"and optionally yielding a specified value. Defaults "
"to the exiting the current stack "
"frame.",
"thread return",
eCommandRequiresFrame | eCommandTryTargetAPILock |
eCommandProcessMustBeLaunched |
eCommandProcessMustBePaused),
m_options() {
CommandArgumentEntry arg;
CommandArgumentData expression_arg;
// Define the first (and only) variant of this arg.
expression_arg.arg_type = eArgTypeExpression;
expression_arg.arg_repetition = eArgRepeatOptional;
// 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);
}
~CommandObjectThreadReturn() override = default;
Options *GetOptions() override { return &m_options; }
protected:
bool DoExecute(llvm::StringRef command,
CommandReturnObject &result) override {
// I am going to handle this by hand, because I don't want you to have to
// say:
// "thread return -- -5".
if (command.startswith("-x")) {
if (command.size() != 2U)
result.AppendWarning("Return values ignored when returning from user "
"called expressions");
Thread *thread = m_exe_ctx.GetThreadPtr();
Status error;
error = thread->UnwindInnermostExpression();
if (!error.Success()) {
result.AppendErrorWithFormat("Unwinding expression failed - %s.",
error.AsCString());
result.SetStatus(eReturnStatusFailed);
} else {
bool success =
thread->SetSelectedFrameByIndexNoisily(0, result.GetOutputStream());
if (success) {
m_exe_ctx.SetFrameSP(thread->GetSelectedFrame());
result.SetStatus(eReturnStatusSuccessFinishResult);
} else {
result.AppendErrorWithFormat(
"Could not select 0th frame after unwinding expression.");
result.SetStatus(eReturnStatusFailed);
}
}
return result.Succeeded();
}
ValueObjectSP return_valobj_sp;
StackFrameSP frame_sp = m_exe_ctx.GetFrameSP();
uint32_t frame_idx = frame_sp->GetFrameIndex();
if (frame_sp->IsInlined()) {
result.AppendError("Don't know how to return from inlined frames.");
result.SetStatus(eReturnStatusFailed);
return false;
}
if (!command.empty()) {
Target *target = m_exe_ctx.GetTargetPtr();
EvaluateExpressionOptions options;
options.SetUnwindOnError(true);
options.SetUseDynamic(eNoDynamicValues);
ExpressionResults exe_results = eExpressionSetupError;
exe_results = target->EvaluateExpression(command, frame_sp.get(),
return_valobj_sp, options);
if (exe_results != eExpressionCompleted) {
if (return_valobj_sp)
result.AppendErrorWithFormat(
"Error evaluating result expression: %s",
return_valobj_sp->GetError().AsCString());
else
result.AppendErrorWithFormat(
"Unknown error evaluating result expression.");
result.SetStatus(eReturnStatusFailed);
return false;
}
}
Status error;
ThreadSP thread_sp = m_exe_ctx.GetThreadSP();
const bool broadcast = true;
error = thread_sp->ReturnFromFrame(frame_sp, return_valobj_sp, broadcast);
if (!error.Success()) {
result.AppendErrorWithFormat(
"Error returning from frame %d of thread %d: %s.", frame_idx,
thread_sp->GetIndexID(), error.AsCString());
result.SetStatus(eReturnStatusFailed);
return false;
}
result.SetStatus(eReturnStatusSuccessFinishResult);
return true;
}
CommandOptions m_options;
};
// CommandObjectThreadJump
#define LLDB_OPTIONS_thread_jump
#include "CommandOptions.inc"
class CommandObjectThreadJump : public CommandObjectParsed {
public:
class CommandOptions : public Options {
public:
CommandOptions() : Options() { OptionParsingStarting(nullptr); }
~CommandOptions() override = default;
void OptionParsingStarting(ExecutionContext *execution_context) override {
m_filenames.Clear();
m_line_num = 0;
m_line_offset = 0;
m_load_addr = LLDB_INVALID_ADDRESS;
m_force = false;
}
Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_arg,
ExecutionContext *execution_context) override {
const int short_option = m_getopt_table[option_idx].val;
Status error;
switch (short_option) {
case 'f':
m_filenames.AppendIfUnique(FileSpec(option_arg));
if (m_filenames.GetSize() > 1)
return Status("only one source file expected.");
break;
case 'l':
if (option_arg.getAsInteger(0, m_line_num))
return Status("invalid line number: '%s'.", option_arg.str().c_str());
break;
case 'b':
if (option_arg.getAsInteger(0, m_line_offset))
return Status("invalid line offset: '%s'.", option_arg.str().c_str());
break;
case 'a':
m_load_addr = OptionArgParser::ToAddress(execution_context, option_arg,
LLDB_INVALID_ADDRESS, &error);
break;
case 'r':
m_force = true;
break;
default:
llvm_unreachable("Unimplemented option");
}
return error;
}
llvm::ArrayRef<OptionDefinition> GetDefinitions() override {
return llvm::makeArrayRef(g_thread_jump_options);
}
FileSpecList m_filenames;
uint32_t m_line_num;
int32_t m_line_offset;
lldb::addr_t m_load_addr;
bool m_force;
};
CommandObjectThreadJump(CommandInterpreter &interpreter)
: CommandObjectParsed(
interpreter, "thread jump",
"Sets the program counter to a new address.", "thread jump",
eCommandRequiresFrame | eCommandTryTargetAPILock |
eCommandProcessMustBeLaunched | eCommandProcessMustBePaused),
m_options() {}
~CommandObjectThreadJump() override = default;
Options *GetOptions() override { return &m_options; }
protected:
bool DoExecute(Args &args, CommandReturnObject &result) override {
RegisterContext *reg_ctx = m_exe_ctx.GetRegisterContext();
StackFrame *frame = m_exe_ctx.GetFramePtr();
Thread *thread = m_exe_ctx.GetThreadPtr();
Target *target = m_exe_ctx.GetTargetPtr();
const SymbolContext &sym_ctx =
frame->GetSymbolContext(eSymbolContextLineEntry);
if (m_options.m_load_addr != LLDB_INVALID_ADDRESS) {
// Use this address directly.
Address dest = Address(m_options.m_load_addr);
lldb::addr_t callAddr = dest.GetCallableLoadAddress(target);
if (callAddr == LLDB_INVALID_ADDRESS) {
result.AppendErrorWithFormat("Invalid destination address.");
result.SetStatus(eReturnStatusFailed);
return false;
}
if (!reg_ctx->SetPC(callAddr)) {
result.AppendErrorWithFormat("Error changing PC value for thread %d.",
thread->GetIndexID());
result.SetStatus(eReturnStatusFailed);
return false;
}
} else {
// Pick either the absolute line, or work out a relative one.
int32_t line = (int32_t)m_options.m_line_num;
if (line == 0)
line = sym_ctx.line_entry.line + m_options.m_line_offset;
// Try the current file, but override if asked.
FileSpec file = sym_ctx.line_entry.file;
if (m_options.m_filenames.GetSize() == 1)
file = m_options.m_filenames.GetFileSpecAtIndex(0);
if (!file) {
result.AppendErrorWithFormat(
"No source file available for the current location.");
result.SetStatus(eReturnStatusFailed);
return false;
}
std::string warnings;
Status err = thread->JumpToLine(file, line, m_options.m_force, &warnings);
if (err.Fail()) {
result.SetError(err);
return false;
}
if (!warnings.empty())
result.AppendWarning(warnings.c_str());
}
result.SetStatus(eReturnStatusSuccessFinishResult);
return true;
}
CommandOptions m_options;
};
// Next are the subcommands of CommandObjectMultiwordThreadPlan
// CommandObjectThreadPlanList
#define LLDB_OPTIONS_thread_plan_list
#include "CommandOptions.inc"
class CommandObjectThreadPlanList : public CommandObjectIterateOverThreads {
public:
class CommandOptions : public Options {
public:
CommandOptions() : Options() {
// Keep default values of all options in one place: OptionParsingStarting
// ()
OptionParsingStarting(nullptr);
}
~CommandOptions() override = default;
Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_arg,
ExecutionContext *execution_context) override {
const int short_option = m_getopt_table[option_idx].val;
switch (short_option) {
case 'i':
m_internal = true;
break;
case 't':
lldb::tid_t tid;
if (option_arg.getAsInteger(0, tid))
return Status("invalid tid: '%s'.", option_arg.str().c_str());
m_tids.push_back(tid);
break;
case 'u':
m_unreported = false;
break;
case 'v':
m_verbose = true;
break;
default:
llvm_unreachable("Unimplemented option");
}
return {};
}
void OptionParsingStarting(ExecutionContext *execution_context) override {
m_verbose = false;
m_internal = false;
m_unreported = true; // The variable is "skip unreported" and we want to
// skip unreported by default.
m_tids.clear();
}
llvm::ArrayRef<OptionDefinition> GetDefinitions() override {
return llvm::makeArrayRef(g_thread_plan_list_options);
}
// Instance variables to hold the values for command options.
bool m_verbose;
bool m_internal;
bool m_unreported;
std::vector<lldb::tid_t> m_tids;
};
CommandObjectThreadPlanList(CommandInterpreter &interpreter)
: CommandObjectIterateOverThreads(
interpreter, "thread plan list",
"Show thread plans for one or more threads. If no threads are "
"specified, show the "
"current thread. Use the thread-index \"all\" to see all threads.",
nullptr,
eCommandRequiresProcess | eCommandRequiresThread |
eCommandTryTargetAPILock | eCommandProcessMustBeLaunched |
eCommandProcessMustBePaused),
m_options() {}
~CommandObjectThreadPlanList() override = default;
Options *GetOptions() override { return &m_options; }
bool DoExecute(Args &command, CommandReturnObject &result) override {
// If we are reporting all threads, dispatch to the Process to do that:
if (command.GetArgumentCount() == 0 && m_options.m_tids.empty()) {
Stream &strm = result.GetOutputStream();
DescriptionLevel desc_level = m_options.m_verbose
? eDescriptionLevelVerbose
: eDescriptionLevelFull;
m_exe_ctx.GetProcessPtr()->DumpThreadPlans(
strm, desc_level, m_options.m_internal, true, m_options.m_unreported);
result.SetStatus(eReturnStatusSuccessFinishResult);
return true;
} else {
// Do any TID's that the user may have specified as TID, then do any
// Thread Indexes...
if (!m_options.m_tids.empty()) {
Process *process = m_exe_ctx.GetProcessPtr();
StreamString tmp_strm;
for (lldb::tid_t tid : m_options.m_tids) {
bool success = process->DumpThreadPlansForTID(
tmp_strm, tid, eDescriptionLevelFull, m_options.m_internal,
true /* condense_trivial */, m_options.m_unreported);
// If we didn't find a TID, stop here and return an error.
if (!success) {
result.SetError("Error dumping plans:");
result.AppendError(tmp_strm.GetString());
result.SetStatus(eReturnStatusFailed);
return false;
}
// Otherwise, add our data to the output:
result.GetOutputStream() << tmp_strm.GetString();
}
}
return CommandObjectIterateOverThreads::DoExecute(command, result);
}
}
protected:
bool HandleOneThread(lldb::tid_t tid, CommandReturnObject &result) override {
// If we have already handled this from a -t option, skip it here.
if (llvm::is_contained(m_options.m_tids, tid))
return true;
Process *process = m_exe_ctx.GetProcessPtr();
Stream &strm = result.GetOutputStream();
DescriptionLevel desc_level = eDescriptionLevelFull;
if (m_options.m_verbose)
desc_level = eDescriptionLevelVerbose;
process->DumpThreadPlansForTID(strm, tid, desc_level, m_options.m_internal,
true /* condense_trivial */,
m_options.m_unreported);
return true;
}
CommandOptions m_options;
};
class CommandObjectThreadPlanDiscard : public CommandObjectParsed {
public:
CommandObjectThreadPlanDiscard(CommandInterpreter &interpreter)
: CommandObjectParsed(interpreter, "thread plan discard",
"Discards thread plans up to and including the "
"specified index (see 'thread plan list'.) "
"Only user visible plans can be discarded.",
nullptr,
eCommandRequiresProcess | eCommandRequiresThread |
eCommandTryTargetAPILock |
eCommandProcessMustBeLaunched |
eCommandProcessMustBePaused) {
CommandArgumentEntry arg;
CommandArgumentData plan_index_arg;
// Define the first (and only) variant of this arg.
plan_index_arg.arg_type = eArgTypeUnsignedInteger;
plan_index_arg.arg_repetition = eArgRepeatPlain;
// There is only one variant this argument could be; put it into the
// argument entry.
arg.push_back(plan_index_arg);
// Push the data for the first argument into the m_arguments vector.
m_arguments.push_back(arg);
}
~CommandObjectThreadPlanDiscard() override = default;
void
HandleArgumentCompletion(CompletionRequest &request,
OptionElementVector &opt_element_vector) override {
if (!m_exe_ctx.HasThreadScope() || request.GetCursorIndex())
return;
m_exe_ctx.GetThreadPtr()->AutoCompleteThreadPlans(request);
}
bool DoExecute(Args &args, CommandReturnObject &result) override {
Thread *thread = m_exe_ctx.GetThreadPtr();
if (args.GetArgumentCount() != 1) {
result.AppendErrorWithFormat("Too many arguments, expected one - the "
"thread plan index - but got %zu.",
args.GetArgumentCount());
result.SetStatus(eReturnStatusFailed);
return false;
}
uint32_t thread_plan_idx;
if (!llvm::to_integer(args.GetArgumentAtIndex(0), thread_plan_idx)) {
result.AppendErrorWithFormat(
"Invalid thread index: \"%s\" - should be unsigned int.",
args.GetArgumentAtIndex(0));
result.SetStatus(eReturnStatusFailed);
return false;
}
if (thread_plan_idx == 0) {
result.AppendErrorWithFormat(
"You wouldn't really want me to discard the base thread plan.");
result.SetStatus(eReturnStatusFailed);
return false;
}
if (thread->DiscardUserThreadPlansUpToIndex(thread_plan_idx)) {
result.SetStatus(eReturnStatusSuccessFinishNoResult);
return true;
} else {
result.AppendErrorWithFormat(
"Could not find User thread plan with index %s.",
args.GetArgumentAtIndex(0));
result.SetStatus(eReturnStatusFailed);
return false;
}
}
};
class CommandObjectThreadPlanPrune : public CommandObjectParsed {
public:
CommandObjectThreadPlanPrune(CommandInterpreter &interpreter)
: CommandObjectParsed(interpreter, "thread plan prune",
"Removes any thread plans associated with "
"currently unreported threads. "
"Specify one or more TID's to remove, or if no "
"TID's are provides, remove threads for all "
"unreported threads",
nullptr,
eCommandRequiresProcess |
eCommandTryTargetAPILock |
eCommandProcessMustBeLaunched |
eCommandProcessMustBePaused) {
CommandArgumentEntry arg;
CommandArgumentData tid_arg;
// Define the first (and only) variant of this arg.
tid_arg.arg_type = eArgTypeThreadID;
tid_arg.arg_repetition = eArgRepeatStar;
// There is only one variant this argument could be; put it into the
// argument entry.
arg.push_back(tid_arg);
// Push the data for the first argument into the m_arguments vector.
m_arguments.push_back(arg);
}
~CommandObjectThreadPlanPrune() override = default;
bool DoExecute(Args &args, CommandReturnObject &result) override {
Process *process = m_exe_ctx.GetProcessPtr();
if (args.GetArgumentCount() == 0) {
process->PruneThreadPlans();
result.SetStatus(eReturnStatusSuccessFinishNoResult);
return true;
}
const size_t num_args = args.GetArgumentCount();
std::lock_guard<std::recursive_mutex> guard(
process->GetThreadList().GetMutex());
for (size_t i = 0; i < num_args; i++) {
lldb::tid_t tid;
if (!llvm::to_integer(args.GetArgumentAtIndex(i), tid)) {
result.AppendErrorWithFormat("invalid thread specification: \"%s\"\n",
args.GetArgumentAtIndex(i));
result.SetStatus(eReturnStatusFailed);
return false;
}
if (!process->PruneThreadPlansForTID(tid)) {
result.AppendErrorWithFormat("Could not find unreported tid: \"%s\"\n",
args.GetArgumentAtIndex(i));
result.SetStatus(eReturnStatusFailed);
return false;
}
}
result.SetStatus(eReturnStatusSuccessFinishNoResult);
return true;
}
};
// CommandObjectMultiwordThreadPlan
class CommandObjectMultiwordThreadPlan : public CommandObjectMultiword {
public:
CommandObjectMultiwordThreadPlan(CommandInterpreter &interpreter)
: CommandObjectMultiword(
interpreter, "plan",
"Commands for managing thread plans that control execution.",
"thread plan <subcommand> [<subcommand objects]") {
LoadSubCommand(
"list", CommandObjectSP(new CommandObjectThreadPlanList(interpreter)));
LoadSubCommand(
"discard",
CommandObjectSP(new CommandObjectThreadPlanDiscard(interpreter)));
LoadSubCommand(
"prune",
CommandObjectSP(new CommandObjectThreadPlanPrune(interpreter)));
}
~CommandObjectMultiwordThreadPlan() override = default;
};
// CommandObjectMultiwordThread
CommandObjectMultiwordThread::CommandObjectMultiwordThread(
CommandInterpreter &interpreter)
: CommandObjectMultiword(interpreter, "thread",
"Commands for operating on "
"one or more threads in "
"the current process.",
"thread <subcommand> [<subcommand-options>]") {
LoadSubCommand("backtrace", CommandObjectSP(new CommandObjectThreadBacktrace(
interpreter)));
LoadSubCommand("continue",
CommandObjectSP(new CommandObjectThreadContinue(interpreter)));
LoadSubCommand("list",
CommandObjectSP(new CommandObjectThreadList(interpreter)));
LoadSubCommand("return",
CommandObjectSP(new CommandObjectThreadReturn(interpreter)));
LoadSubCommand("jump",
CommandObjectSP(new CommandObjectThreadJump(interpreter)));
LoadSubCommand("select",
CommandObjectSP(new CommandObjectThreadSelect(interpreter)));
LoadSubCommand("until",
CommandObjectSP(new CommandObjectThreadUntil(interpreter)));
LoadSubCommand("info",
CommandObjectSP(new CommandObjectThreadInfo(interpreter)));
LoadSubCommand("exception", CommandObjectSP(new CommandObjectThreadException(
interpreter)));
LoadSubCommand("step-in",
CommandObjectSP(new CommandObjectThreadStepWithTypeAndScope(
interpreter, "thread step-in",
"Source level single step, stepping into calls. Defaults "
"to current thread unless specified.",
nullptr, eStepTypeInto, eStepScopeSource)));
LoadSubCommand("step-out",
CommandObjectSP(new CommandObjectThreadStepWithTypeAndScope(
interpreter, "thread step-out",
"Finish executing the current stack frame and stop after "
"returning. Defaults to current thread unless specified.",
nullptr, eStepTypeOut, eStepScopeSource)));
LoadSubCommand("step-over",
CommandObjectSP(new CommandObjectThreadStepWithTypeAndScope(
interpreter, "thread step-over",
"Source level single step, stepping over calls. Defaults "
"to current thread unless specified.",
nullptr, eStepTypeOver, eStepScopeSource)));
LoadSubCommand("step-inst",
CommandObjectSP(new CommandObjectThreadStepWithTypeAndScope(
interpreter, "thread step-inst",
"Instruction level single step, stepping into calls. "
"Defaults to current thread unless specified.",
nullptr, eStepTypeTrace, eStepScopeInstruction)));
LoadSubCommand("step-inst-over",
CommandObjectSP(new CommandObjectThreadStepWithTypeAndScope(
interpreter, "thread step-inst-over",
"Instruction level single step, stepping over calls. "
"Defaults to current thread unless specified.",
nullptr, eStepTypeTraceOver, eStepScopeInstruction)));
LoadSubCommand(
"step-scripted",
CommandObjectSP(new CommandObjectThreadStepWithTypeAndScope(
interpreter, "thread step-scripted",
"Step as instructed by the script class passed in the -C option. "
"You can also specify a dictionary of key (-k) and value (-v) pairs "
"that will be used to populate an SBStructuredData Dictionary, which "
"will be passed to the constructor of the class implementing the "
"scripted step. See the Python Reference for more details.",
nullptr, eStepTypeScripted, eStepScopeSource)));
LoadSubCommand("plan", CommandObjectSP(new CommandObjectMultiwordThreadPlan(
interpreter)));
}
CommandObjectMultiwordThread::~CommandObjectMultiwordThread() = default;
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