| //===-- CommandObjectWatchpoint.cpp -----------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "CommandObjectWatchpoint.h" |
| #include "CommandObjectWatchpointCommand.h" |
| |
| // C Includes |
| // C++ Includes |
| #include <vector> |
| |
| // Other libraries and framework includes |
| #include "llvm/ADT/StringRef.h" |
| |
| // Project includes |
| #include "lldb/Breakpoint/Watchpoint.h" |
| #include "lldb/Breakpoint/WatchpointList.h" |
| #include "lldb/Core/ValueObject.h" |
| #include "lldb/Core/ValueObjectVariable.h" |
| #include "lldb/Host/OptionParser.h" |
| #include "lldb/Interpreter/CommandCompletions.h" |
| #include "lldb/Interpreter/CommandInterpreter.h" |
| #include "lldb/Interpreter/CommandReturnObject.h" |
| #include "lldb/Symbol/Variable.h" |
| #include "lldb/Symbol/VariableList.h" |
| #include "lldb/Target/StackFrame.h" |
| #include "lldb/Target/Target.h" |
| #include "lldb/Utility/StreamString.h" |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| static void AddWatchpointDescription(Stream *s, Watchpoint *wp, |
| lldb::DescriptionLevel level) { |
| s->IndentMore(); |
| wp->GetDescription(s, level); |
| s->IndentLess(); |
| s->EOL(); |
| } |
| |
| static bool CheckTargetForWatchpointOperations(Target *target, |
| CommandReturnObject &result) { |
| if (target == nullptr) { |
| result.AppendError("Invalid target. No existing target or watchpoints."); |
| result.SetStatus(eReturnStatusFailed); |
| return false; |
| } |
| bool process_is_valid = |
| target->GetProcessSP() && target->GetProcessSP()->IsAlive(); |
| if (!process_is_valid) { |
| result.AppendError("Thre's no process or it is not alive."); |
| result.SetStatus(eReturnStatusFailed); |
| return false; |
| } |
| // Target passes our checks, return true. |
| return true; |
| } |
| |
| // Equivalent class: {"-", "to", "To", "TO"} of range specifier array. |
| static const char *RSA[4] = {"-", "to", "To", "TO"}; |
| |
| // Return the index to RSA if found; otherwise -1 is returned. |
| static int32_t WithRSAIndex(llvm::StringRef Arg) { |
| |
| uint32_t i; |
| for (i = 0; i < 4; ++i) |
| if (Arg.find(RSA[i]) != llvm::StringRef::npos) |
| return i; |
| return -1; |
| } |
| |
| // Return true if wp_ids is successfully populated with the watch ids. False |
| // otherwise. |
| bool CommandObjectMultiwordWatchpoint::VerifyWatchpointIDs( |
| Target *target, Args &args, std::vector<uint32_t> &wp_ids) { |
| // Pre-condition: args.GetArgumentCount() > 0. |
| if (args.GetArgumentCount() == 0) { |
| if (target == nullptr) |
| return false; |
| WatchpointSP watch_sp = target->GetLastCreatedWatchpoint(); |
| if (watch_sp) { |
| wp_ids.push_back(watch_sp->GetID()); |
| return true; |
| } else |
| return false; |
| } |
| |
| llvm::StringRef Minus("-"); |
| std::vector<llvm::StringRef> StrRefArgs; |
| llvm::StringRef first; |
| llvm::StringRef second; |
| size_t i; |
| int32_t idx; |
| // Go through the arguments and make a canonical form of arg list containing |
| // only numbers with possible "-" in between. |
| for (auto &entry : args.entries()) { |
| if ((idx = WithRSAIndex(entry.ref)) == -1) { |
| StrRefArgs.push_back(entry.ref); |
| continue; |
| } |
| // The Arg contains the range specifier, split it, then. |
| std::tie(first, second) = entry.ref.split(RSA[idx]); |
| if (!first.empty()) |
| StrRefArgs.push_back(first); |
| StrRefArgs.push_back(Minus); |
| if (!second.empty()) |
| StrRefArgs.push_back(second); |
| } |
| // Now process the canonical list and fill in the vector of uint32_t's. If |
| // there is any error, return false and the client should ignore wp_ids. |
| uint32_t beg, end, id; |
| size_t size = StrRefArgs.size(); |
| bool in_range = false; |
| for (i = 0; i < size; ++i) { |
| llvm::StringRef Arg = StrRefArgs[i]; |
| if (in_range) { |
| // Look for the 'end' of the range. Note StringRef::getAsInteger() |
| // returns true to signify error while parsing. |
| if (Arg.getAsInteger(0, end)) |
| return false; |
| // Found a range! Now append the elements. |
| for (id = beg; id <= end; ++id) |
| wp_ids.push_back(id); |
| in_range = false; |
| continue; |
| } |
| if (i < (size - 1) && StrRefArgs[i + 1] == Minus) { |
| if (Arg.getAsInteger(0, beg)) |
| return false; |
| // Turn on the in_range flag, we are looking for end of range next. |
| ++i; |
| in_range = true; |
| continue; |
| } |
| // Otherwise, we have a simple ID. Just append it. |
| if (Arg.getAsInteger(0, beg)) |
| return false; |
| wp_ids.push_back(beg); |
| } |
| // It is an error if after the loop, we're still in_range. |
| if (in_range) |
| return false; |
| |
| return true; // Success! |
| } |
| |
| //------------------------------------------------------------------------- |
| // CommandObjectWatchpointList |
| //------------------------------------------------------------------------- |
| |
| //------------------------------------------------------------------------- |
| // CommandObjectWatchpointList::Options |
| //------------------------------------------------------------------------- |
| #pragma mark List::CommandOptions |
| |
| static OptionDefinition g_watchpoint_list_options[] = { |
| // clang-format off |
| { LLDB_OPT_SET_1, false, "brief", 'b', OptionParser::eNoArgument, nullptr, nullptr, 0, eArgTypeNone, "Give a brief description of the watchpoint (no location info)." }, |
| { LLDB_OPT_SET_2, false, "full", 'f', OptionParser::eNoArgument, nullptr, nullptr, 0, eArgTypeNone, "Give a full description of the watchpoint and its locations." }, |
| { LLDB_OPT_SET_3, false, "verbose", 'v', OptionParser::eNoArgument, nullptr, nullptr, 0, eArgTypeNone, "Explain everything we know about the watchpoint (for debugging debugger bugs)." } |
| // clang-format on |
| }; |
| |
| #pragma mark List |
| |
| class CommandObjectWatchpointList : public CommandObjectParsed { |
| public: |
| CommandObjectWatchpointList(CommandInterpreter &interpreter) |
| : CommandObjectParsed( |
| interpreter, "watchpoint list", |
| "List all watchpoints at configurable levels of detail.", nullptr), |
| m_options() { |
| CommandArgumentEntry arg; |
| CommandObject::AddIDsArgumentData(arg, eArgTypeWatchpointID, |
| eArgTypeWatchpointIDRange); |
| // Add the entry for the first argument for this command to the object's |
| // arguments vector. |
| m_arguments.push_back(arg); |
| } |
| |
| ~CommandObjectWatchpointList() override = default; |
| |
| Options *GetOptions() override { return &m_options; } |
| |
| class CommandOptions : public Options { |
| public: |
| CommandOptions() |
| : Options(), |
| m_level(lldb::eDescriptionLevelBrief) // Watchpoint List defaults to |
| // brief descriptions |
| {} |
| |
| ~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 'b': |
| m_level = lldb::eDescriptionLevelBrief; |
| break; |
| case 'f': |
| m_level = lldb::eDescriptionLevelFull; |
| break; |
| case 'v': |
| m_level = lldb::eDescriptionLevelVerbose; |
| break; |
| default: |
| error.SetErrorStringWithFormat("unrecognized option '%c'", |
| short_option); |
| break; |
| } |
| |
| return error; |
| } |
| |
| void OptionParsingStarting(ExecutionContext *execution_context) override { |
| m_level = lldb::eDescriptionLevelFull; |
| } |
| |
| llvm::ArrayRef<OptionDefinition> GetDefinitions() override { |
| return llvm::makeArrayRef(g_watchpoint_list_options); |
| } |
| |
| // Instance variables to hold the values for command options. |
| |
| lldb::DescriptionLevel m_level; |
| }; |
| |
| protected: |
| bool DoExecute(Args &command, CommandReturnObject &result) override { |
| Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get(); |
| if (target == nullptr) { |
| result.AppendError("Invalid target. No current target or watchpoints."); |
| result.SetStatus(eReturnStatusSuccessFinishNoResult); |
| return true; |
| } |
| |
| if (target->GetProcessSP() && target->GetProcessSP()->IsAlive()) { |
| uint32_t num_supported_hardware_watchpoints; |
| Status error = target->GetProcessSP()->GetWatchpointSupportInfo( |
| num_supported_hardware_watchpoints); |
| if (error.Success()) |
| result.AppendMessageWithFormat( |
| "Number of supported hardware watchpoints: %u\n", |
| num_supported_hardware_watchpoints); |
| } |
| |
| const WatchpointList &watchpoints = target->GetWatchpointList(); |
| |
| std::unique_lock<std::recursive_mutex> lock; |
| target->GetWatchpointList().GetListMutex(lock); |
| |
| size_t num_watchpoints = watchpoints.GetSize(); |
| |
| if (num_watchpoints == 0) { |
| result.AppendMessage("No watchpoints currently set."); |
| result.SetStatus(eReturnStatusSuccessFinishNoResult); |
| return true; |
| } |
| |
| Stream &output_stream = result.GetOutputStream(); |
| |
| if (command.GetArgumentCount() == 0) { |
| // No watchpoint selected; show info about all currently set watchpoints. |
| result.AppendMessage("Current watchpoints:"); |
| for (size_t i = 0; i < num_watchpoints; ++i) { |
| Watchpoint *wp = watchpoints.GetByIndex(i).get(); |
| AddWatchpointDescription(&output_stream, wp, m_options.m_level); |
| } |
| result.SetStatus(eReturnStatusSuccessFinishNoResult); |
| } else { |
| // Particular watchpoints selected; enable them. |
| std::vector<uint32_t> wp_ids; |
| if (!CommandObjectMultiwordWatchpoint::VerifyWatchpointIDs( |
| target, command, wp_ids)) { |
| result.AppendError("Invalid watchpoints specification."); |
| result.SetStatus(eReturnStatusFailed); |
| return false; |
| } |
| |
| const size_t size = wp_ids.size(); |
| for (size_t i = 0; i < size; ++i) { |
| Watchpoint *wp = watchpoints.FindByID(wp_ids[i]).get(); |
| if (wp) |
| AddWatchpointDescription(&output_stream, wp, m_options.m_level); |
| result.SetStatus(eReturnStatusSuccessFinishNoResult); |
| } |
| } |
| |
| return result.Succeeded(); |
| } |
| |
| private: |
| CommandOptions m_options; |
| }; |
| |
| //------------------------------------------------------------------------- |
| // CommandObjectWatchpointEnable |
| //------------------------------------------------------------------------- |
| #pragma mark Enable |
| |
| class CommandObjectWatchpointEnable : public CommandObjectParsed { |
| public: |
| CommandObjectWatchpointEnable(CommandInterpreter &interpreter) |
| : CommandObjectParsed(interpreter, "enable", |
| "Enable the specified disabled watchpoint(s). If " |
| "no watchpoints are specified, enable all of them.", |
| nullptr) { |
| CommandArgumentEntry arg; |
| CommandObject::AddIDsArgumentData(arg, eArgTypeWatchpointID, |
| eArgTypeWatchpointIDRange); |
| // Add the entry for the first argument for this command to the object's |
| // arguments vector. |
| m_arguments.push_back(arg); |
| } |
| |
| ~CommandObjectWatchpointEnable() override = default; |
| |
| protected: |
| bool DoExecute(Args &command, CommandReturnObject &result) override { |
| Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get(); |
| if (!CheckTargetForWatchpointOperations(target, result)) |
| return false; |
| |
| std::unique_lock<std::recursive_mutex> lock; |
| target->GetWatchpointList().GetListMutex(lock); |
| |
| const WatchpointList &watchpoints = target->GetWatchpointList(); |
| |
| size_t num_watchpoints = watchpoints.GetSize(); |
| |
| if (num_watchpoints == 0) { |
| result.AppendError("No watchpoints exist to be enabled."); |
| result.SetStatus(eReturnStatusFailed); |
| return false; |
| } |
| |
| if (command.GetArgumentCount() == 0) { |
| // No watchpoint selected; enable all currently set watchpoints. |
| target->EnableAllWatchpoints(); |
| result.AppendMessageWithFormat("All watchpoints enabled. (%" PRIu64 |
| " watchpoints)\n", |
| (uint64_t)num_watchpoints); |
| result.SetStatus(eReturnStatusSuccessFinishNoResult); |
| } else { |
| // Particular watchpoints selected; enable them. |
| std::vector<uint32_t> wp_ids; |
| if (!CommandObjectMultiwordWatchpoint::VerifyWatchpointIDs( |
| target, command, wp_ids)) { |
| result.AppendError("Invalid watchpoints specification."); |
| result.SetStatus(eReturnStatusFailed); |
| return false; |
| } |
| |
| int count = 0; |
| const size_t size = wp_ids.size(); |
| for (size_t i = 0; i < size; ++i) |
| if (target->EnableWatchpointByID(wp_ids[i])) |
| ++count; |
| result.AppendMessageWithFormat("%d watchpoints enabled.\n", count); |
| result.SetStatus(eReturnStatusSuccessFinishNoResult); |
| } |
| |
| return result.Succeeded(); |
| } |
| }; |
| |
| //------------------------------------------------------------------------- |
| // CommandObjectWatchpointDisable |
| //------------------------------------------------------------------------- |
| #pragma mark Disable |
| |
| class CommandObjectWatchpointDisable : public CommandObjectParsed { |
| public: |
| CommandObjectWatchpointDisable(CommandInterpreter &interpreter) |
| : CommandObjectParsed(interpreter, "watchpoint disable", |
| "Disable the specified watchpoint(s) without " |
| "removing it/them. If no watchpoints are " |
| "specified, disable them all.", |
| nullptr) { |
| CommandArgumentEntry arg; |
| CommandObject::AddIDsArgumentData(arg, eArgTypeWatchpointID, |
| eArgTypeWatchpointIDRange); |
| // Add the entry for the first argument for this command to the object's |
| // arguments vector. |
| m_arguments.push_back(arg); |
| } |
| |
| ~CommandObjectWatchpointDisable() override = default; |
| |
| protected: |
| bool DoExecute(Args &command, CommandReturnObject &result) override { |
| Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get(); |
| if (!CheckTargetForWatchpointOperations(target, result)) |
| return false; |
| |
| std::unique_lock<std::recursive_mutex> lock; |
| target->GetWatchpointList().GetListMutex(lock); |
| |
| const WatchpointList &watchpoints = target->GetWatchpointList(); |
| size_t num_watchpoints = watchpoints.GetSize(); |
| |
| if (num_watchpoints == 0) { |
| result.AppendError("No watchpoints exist to be disabled."); |
| result.SetStatus(eReturnStatusFailed); |
| return false; |
| } |
| |
| if (command.GetArgumentCount() == 0) { |
| // No watchpoint selected; disable all currently set watchpoints. |
| if (target->DisableAllWatchpoints()) { |
| result.AppendMessageWithFormat("All watchpoints disabled. (%" PRIu64 |
| " watchpoints)\n", |
| (uint64_t)num_watchpoints); |
| result.SetStatus(eReturnStatusSuccessFinishNoResult); |
| } else { |
| result.AppendError("Disable all watchpoints failed\n"); |
| result.SetStatus(eReturnStatusFailed); |
| } |
| } else { |
| // Particular watchpoints selected; disable them. |
| std::vector<uint32_t> wp_ids; |
| if (!CommandObjectMultiwordWatchpoint::VerifyWatchpointIDs( |
| target, command, wp_ids)) { |
| result.AppendError("Invalid watchpoints specification."); |
| result.SetStatus(eReturnStatusFailed); |
| return false; |
| } |
| |
| int count = 0; |
| const size_t size = wp_ids.size(); |
| for (size_t i = 0; i < size; ++i) |
| if (target->DisableWatchpointByID(wp_ids[i])) |
| ++count; |
| result.AppendMessageWithFormat("%d watchpoints disabled.\n", count); |
| result.SetStatus(eReturnStatusSuccessFinishNoResult); |
| } |
| |
| return result.Succeeded(); |
| } |
| }; |
| |
| //------------------------------------------------------------------------- |
| // CommandObjectWatchpointDelete |
| //------------------------------------------------------------------------- |
| #pragma mark Delete |
| |
| class CommandObjectWatchpointDelete : public CommandObjectParsed { |
| public: |
| CommandObjectWatchpointDelete(CommandInterpreter &interpreter) |
| : CommandObjectParsed(interpreter, "watchpoint delete", |
| "Delete the specified watchpoint(s). If no " |
| "watchpoints are specified, delete them all.", |
| nullptr) { |
| CommandArgumentEntry arg; |
| CommandObject::AddIDsArgumentData(arg, eArgTypeWatchpointID, |
| eArgTypeWatchpointIDRange); |
| // Add the entry for the first argument for this command to the object's |
| // arguments vector. |
| m_arguments.push_back(arg); |
| } |
| |
| ~CommandObjectWatchpointDelete() override = default; |
| |
| protected: |
| bool DoExecute(Args &command, CommandReturnObject &result) override { |
| Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get(); |
| if (!CheckTargetForWatchpointOperations(target, result)) |
| return false; |
| |
| std::unique_lock<std::recursive_mutex> lock; |
| target->GetWatchpointList().GetListMutex(lock); |
| |
| const WatchpointList &watchpoints = target->GetWatchpointList(); |
| |
| size_t num_watchpoints = watchpoints.GetSize(); |
| |
| if (num_watchpoints == 0) { |
| result.AppendError("No watchpoints exist to be deleted."); |
| result.SetStatus(eReturnStatusFailed); |
| return false; |
| } |
| |
| if (command.GetArgumentCount() == 0) { |
| if (!m_interpreter.Confirm( |
| "About to delete all watchpoints, do you want to do that?", |
| true)) { |
| result.AppendMessage("Operation cancelled..."); |
| } else { |
| target->RemoveAllWatchpoints(); |
| result.AppendMessageWithFormat("All watchpoints removed. (%" PRIu64 |
| " watchpoints)\n", |
| (uint64_t)num_watchpoints); |
| } |
| result.SetStatus(eReturnStatusSuccessFinishNoResult); |
| } else { |
| // Particular watchpoints selected; delete them. |
| std::vector<uint32_t> wp_ids; |
| if (!CommandObjectMultiwordWatchpoint::VerifyWatchpointIDs( |
| target, command, wp_ids)) { |
| result.AppendError("Invalid watchpoints specification."); |
| result.SetStatus(eReturnStatusFailed); |
| return false; |
| } |
| |
| int count = 0; |
| const size_t size = wp_ids.size(); |
| for (size_t i = 0; i < size; ++i) |
| if (target->RemoveWatchpointByID(wp_ids[i])) |
| ++count; |
| result.AppendMessageWithFormat("%d watchpoints deleted.\n", count); |
| result.SetStatus(eReturnStatusSuccessFinishNoResult); |
| } |
| |
| return result.Succeeded(); |
| } |
| }; |
| |
| //------------------------------------------------------------------------- |
| // CommandObjectWatchpointIgnore |
| //------------------------------------------------------------------------- |
| |
| #pragma mark Ignore::CommandOptions |
| static OptionDefinition g_watchpoint_ignore_options[] = { |
| // clang-format off |
| { LLDB_OPT_SET_ALL, true, "ignore-count", 'i', OptionParser::eRequiredArgument, nullptr, nullptr, 0, eArgTypeCount, "Set the number of times this watchpoint is skipped before stopping." } |
| // clang-format on |
| }; |
| |
| class CommandObjectWatchpointIgnore : public CommandObjectParsed { |
| public: |
| CommandObjectWatchpointIgnore(CommandInterpreter &interpreter) |
| : CommandObjectParsed(interpreter, "watchpoint ignore", |
| "Set ignore count on the specified watchpoint(s). " |
| "If no watchpoints are specified, set them all.", |
| nullptr), |
| m_options() { |
| CommandArgumentEntry arg; |
| CommandObject::AddIDsArgumentData(arg, eArgTypeWatchpointID, |
| eArgTypeWatchpointIDRange); |
| // Add the entry for the first argument for this command to the object's |
| // arguments vector. |
| m_arguments.push_back(arg); |
| } |
| |
| ~CommandObjectWatchpointIgnore() override = default; |
| |
| Options *GetOptions() override { return &m_options; } |
| |
| class CommandOptions : public Options { |
| public: |
| CommandOptions() : Options(), m_ignore_count(0) {} |
| |
| ~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 'i': |
| if (option_arg.getAsInteger(0, m_ignore_count)) |
| error.SetErrorStringWithFormat("invalid ignore count '%s'", |
| option_arg.str().c_str()); |
| break; |
| default: |
| error.SetErrorStringWithFormat("unrecognized option '%c'", |
| short_option); |
| break; |
| } |
| |
| return error; |
| } |
| |
| void OptionParsingStarting(ExecutionContext *execution_context) override { |
| m_ignore_count = 0; |
| } |
| |
| llvm::ArrayRef<OptionDefinition> GetDefinitions() override { |
| return llvm::makeArrayRef(g_watchpoint_ignore_options); |
| } |
| |
| // Instance variables to hold the values for command options. |
| |
| uint32_t m_ignore_count; |
| }; |
| |
| protected: |
| bool DoExecute(Args &command, CommandReturnObject &result) override { |
| Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get(); |
| if (!CheckTargetForWatchpointOperations(target, result)) |
| return false; |
| |
| std::unique_lock<std::recursive_mutex> lock; |
| target->GetWatchpointList().GetListMutex(lock); |
| |
| const WatchpointList &watchpoints = target->GetWatchpointList(); |
| |
| size_t num_watchpoints = watchpoints.GetSize(); |
| |
| if (num_watchpoints == 0) { |
| result.AppendError("No watchpoints exist to be ignored."); |
| result.SetStatus(eReturnStatusFailed); |
| return false; |
| } |
| |
| if (command.GetArgumentCount() == 0) { |
| target->IgnoreAllWatchpoints(m_options.m_ignore_count); |
| result.AppendMessageWithFormat("All watchpoints ignored. (%" PRIu64 |
| " watchpoints)\n", |
| (uint64_t)num_watchpoints); |
| result.SetStatus(eReturnStatusSuccessFinishNoResult); |
| } else { |
| // Particular watchpoints selected; ignore them. |
| std::vector<uint32_t> wp_ids; |
| if (!CommandObjectMultiwordWatchpoint::VerifyWatchpointIDs( |
| target, command, wp_ids)) { |
| result.AppendError("Invalid watchpoints specification."); |
| result.SetStatus(eReturnStatusFailed); |
| return false; |
| } |
| |
| int count = 0; |
| const size_t size = wp_ids.size(); |
| for (size_t i = 0; i < size; ++i) |
| if (target->IgnoreWatchpointByID(wp_ids[i], m_options.m_ignore_count)) |
| ++count; |
| result.AppendMessageWithFormat("%d watchpoints ignored.\n", count); |
| result.SetStatus(eReturnStatusSuccessFinishNoResult); |
| } |
| |
| return result.Succeeded(); |
| } |
| |
| private: |
| CommandOptions m_options; |
| }; |
| |
| //------------------------------------------------------------------------- |
| // CommandObjectWatchpointModify |
| //------------------------------------------------------------------------- |
| |
| #pragma mark Modify::CommandOptions |
| |
| static OptionDefinition g_watchpoint_modify_options[] = { |
| // clang-format off |
| { LLDB_OPT_SET_ALL, false, "condition", 'c', OptionParser::eRequiredArgument, nullptr, nullptr, 0, eArgTypeExpression, "The watchpoint stops only if this condition expression evaluates to true." } |
| // clang-format on |
| }; |
| |
| #pragma mark Modify |
| |
| class CommandObjectWatchpointModify : public CommandObjectParsed { |
| public: |
| CommandObjectWatchpointModify(CommandInterpreter &interpreter) |
| : CommandObjectParsed( |
| interpreter, "watchpoint modify", |
| "Modify the options on a watchpoint or set of watchpoints in the " |
| "executable. " |
| "If no watchpoint is specified, act on the last created " |
| "watchpoint. " |
| "Passing an empty argument clears the modification.", |
| nullptr), |
| m_options() { |
| CommandArgumentEntry arg; |
| CommandObject::AddIDsArgumentData(arg, eArgTypeWatchpointID, |
| eArgTypeWatchpointIDRange); |
| // Add the entry for the first argument for this command to the object's |
| // arguments vector. |
| m_arguments.push_back(arg); |
| } |
| |
| ~CommandObjectWatchpointModify() override = default; |
| |
| Options *GetOptions() override { return &m_options; } |
| |
| class CommandOptions : public Options { |
| public: |
| CommandOptions() : Options(), m_condition(), m_condition_passed(false) {} |
| |
| ~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': |
| m_condition = option_arg; |
| m_condition_passed = true; |
| break; |
| default: |
| error.SetErrorStringWithFormat("unrecognized option '%c'", |
| short_option); |
| break; |
| } |
| |
| return error; |
| } |
| |
| void OptionParsingStarting(ExecutionContext *execution_context) override { |
| m_condition.clear(); |
| m_condition_passed = false; |
| } |
| |
| llvm::ArrayRef<OptionDefinition> GetDefinitions() override { |
| return llvm::makeArrayRef(g_watchpoint_modify_options); |
| } |
| |
| // Instance variables to hold the values for command options. |
| |
| std::string m_condition; |
| bool m_condition_passed; |
| }; |
| |
| protected: |
| bool DoExecute(Args &command, CommandReturnObject &result) override { |
| Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get(); |
| if (!CheckTargetForWatchpointOperations(target, result)) |
| return false; |
| |
| std::unique_lock<std::recursive_mutex> lock; |
| target->GetWatchpointList().GetListMutex(lock); |
| |
| const WatchpointList &watchpoints = target->GetWatchpointList(); |
| |
| size_t num_watchpoints = watchpoints.GetSize(); |
| |
| if (num_watchpoints == 0) { |
| result.AppendError("No watchpoints exist to be modified."); |
| result.SetStatus(eReturnStatusFailed); |
| return false; |
| } |
| |
| if (command.GetArgumentCount() == 0) { |
| WatchpointSP wp_sp = target->GetLastCreatedWatchpoint(); |
| wp_sp->SetCondition(m_options.m_condition.c_str()); |
| result.SetStatus(eReturnStatusSuccessFinishNoResult); |
| } else { |
| // Particular watchpoints selected; set condition on them. |
| std::vector<uint32_t> wp_ids; |
| if (!CommandObjectMultiwordWatchpoint::VerifyWatchpointIDs( |
| target, command, wp_ids)) { |
| result.AppendError("Invalid watchpoints specification."); |
| result.SetStatus(eReturnStatusFailed); |
| return false; |
| } |
| |
| int count = 0; |
| const size_t size = wp_ids.size(); |
| for (size_t i = 0; i < size; ++i) { |
| WatchpointSP wp_sp = watchpoints.FindByID(wp_ids[i]); |
| if (wp_sp) { |
| wp_sp->SetCondition(m_options.m_condition.c_str()); |
| ++count; |
| } |
| } |
| result.AppendMessageWithFormat("%d watchpoints modified.\n", count); |
| result.SetStatus(eReturnStatusSuccessFinishNoResult); |
| } |
| |
| return result.Succeeded(); |
| } |
| |
| private: |
| CommandOptions m_options; |
| }; |
| |
| //------------------------------------------------------------------------- |
| // CommandObjectWatchpointSetVariable |
| //------------------------------------------------------------------------- |
| #pragma mark SetVariable |
| |
| class CommandObjectWatchpointSetVariable : public CommandObjectParsed { |
| public: |
| CommandObjectWatchpointSetVariable(CommandInterpreter &interpreter) |
| : CommandObjectParsed( |
| interpreter, "watchpoint set variable", |
| "Set a watchpoint on a variable. " |
| "Use the '-w' option to specify the type of watchpoint and " |
| "the '-s' option to specify the byte size to watch for. " |
| "If no '-w' option is specified, it defaults to write. " |
| "If no '-s' option is specified, it defaults to the variable's " |
| "byte size. " |
| "Note that there are limited hardware resources for watchpoints. " |
| "If watchpoint setting fails, consider disable/delete existing " |
| "ones " |
| "to free up resources.", |
| nullptr, |
| eCommandRequiresFrame | eCommandTryTargetAPILock | |
| eCommandProcessMustBeLaunched | eCommandProcessMustBePaused), |
| m_option_group(), m_option_watchpoint() { |
| SetHelpLong( |
| R"( |
| Examples: |
| |
| (lldb) watchpoint set variable -w read_write my_global_var |
| |
| )" |
| " Watches my_global_var for read/write access, with the region to watch \ |
| corresponding to the byte size of the data type."); |
| |
| CommandArgumentEntry arg; |
| CommandArgumentData var_name_arg; |
| |
| // Define the only variant of this arg. |
| var_name_arg.arg_type = eArgTypeVarName; |
| var_name_arg.arg_repetition = eArgRepeatPlain; |
| |
| // Push the variant into the argument entry. |
| arg.push_back(var_name_arg); |
| |
| // Push the data for the only argument into the m_arguments vector. |
| m_arguments.push_back(arg); |
| |
| // Absorb the '-w' and '-s' options into our option group. |
| m_option_group.Append(&m_option_watchpoint, LLDB_OPT_SET_ALL, |
| LLDB_OPT_SET_1); |
| m_option_group.Finalize(); |
| } |
| |
| ~CommandObjectWatchpointSetVariable() override = default; |
| |
| Options *GetOptions() override { return &m_option_group; } |
| |
| protected: |
| static size_t GetVariableCallback(void *baton, const char *name, |
| VariableList &variable_list) { |
| Target *target = static_cast<Target *>(baton); |
| if (target) { |
| return target->GetImages().FindGlobalVariables(ConstString(name), |
| UINT32_MAX, variable_list); |
| } |
| return 0; |
| } |
| |
| bool DoExecute(Args &command, CommandReturnObject &result) override { |
| Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get(); |
| StackFrame *frame = m_exe_ctx.GetFramePtr(); |
| |
| // If no argument is present, issue an error message. There's no way to |
| // set a watchpoint. |
| if (command.GetArgumentCount() <= 0) { |
| result.GetErrorStream().Printf("error: required argument missing; " |
| "specify your program variable to watch " |
| "for\n"); |
| result.SetStatus(eReturnStatusFailed); |
| return false; |
| } |
| |
| // If no '-w' is specified, default to '-w write'. |
| if (!m_option_watchpoint.watch_type_specified) { |
| m_option_watchpoint.watch_type = OptionGroupWatchpoint::eWatchWrite; |
| } |
| |
| // We passed the sanity check for the command. Proceed to set the |
| // watchpoint now. |
| lldb::addr_t addr = 0; |
| size_t size = 0; |
| |
| VariableSP var_sp; |
| ValueObjectSP valobj_sp; |
| Stream &output_stream = result.GetOutputStream(); |
| |
| // A simple watch variable gesture allows only one argument. |
| if (command.GetArgumentCount() != 1) { |
| result.GetErrorStream().Printf( |
| "error: specify exactly one variable to watch for\n"); |
| result.SetStatus(eReturnStatusFailed); |
| return false; |
| } |
| |
| // Things have checked out ok... |
| Status error; |
| uint32_t expr_path_options = |
| StackFrame::eExpressionPathOptionCheckPtrVsMember | |
| StackFrame::eExpressionPathOptionsAllowDirectIVarAccess; |
| valobj_sp = frame->GetValueForVariableExpressionPath( |
| command.GetArgumentAtIndex(0), eNoDynamicValues, expr_path_options, |
| var_sp, error); |
| |
| if (!valobj_sp) { |
| // Not in the frame; let's check the globals. |
| |
| VariableList variable_list; |
| ValueObjectList valobj_list; |
| |
| Status error(Variable::GetValuesForVariableExpressionPath( |
| command.GetArgumentAtIndex(0), |
| m_exe_ctx.GetBestExecutionContextScope(), GetVariableCallback, target, |
| variable_list, valobj_list)); |
| |
| if (valobj_list.GetSize()) |
| valobj_sp = valobj_list.GetValueObjectAtIndex(0); |
| } |
| |
| CompilerType compiler_type; |
| |
| if (valobj_sp) { |
| AddressType addr_type; |
| addr = valobj_sp->GetAddressOf(false, &addr_type); |
| if (addr_type == eAddressTypeLoad) { |
| // We're in business. |
| // Find out the size of this variable. |
| size = m_option_watchpoint.watch_size == 0 |
| ? valobj_sp->GetByteSize() |
| : m_option_watchpoint.watch_size; |
| } |
| compiler_type = valobj_sp->GetCompilerType(); |
| } else { |
| const char *error_cstr = error.AsCString(nullptr); |
| if (error_cstr) |
| result.GetErrorStream().Printf("error: %s\n", error_cstr); |
| else |
| result.GetErrorStream().Printf("error: unable to find any variable " |
| "expression path that matches '%s'\n", |
| command.GetArgumentAtIndex(0)); |
| return false; |
| } |
| |
| // Now it's time to create the watchpoint. |
| uint32_t watch_type = m_option_watchpoint.watch_type; |
| |
| error.Clear(); |
| Watchpoint *wp = |
| target->CreateWatchpoint(addr, size, &compiler_type, watch_type, error) |
| .get(); |
| if (wp) { |
| wp->SetWatchSpec(command.GetArgumentAtIndex(0)); |
| wp->SetWatchVariable(true); |
| if (var_sp && var_sp->GetDeclaration().GetFile()) { |
| StreamString ss; |
| // True to show fullpath for declaration file. |
| var_sp->GetDeclaration().DumpStopContext(&ss, true); |
| wp->SetDeclInfo(ss.GetString()); |
| } |
| output_stream.Printf("Watchpoint created: "); |
| wp->GetDescription(&output_stream, lldb::eDescriptionLevelFull); |
| output_stream.EOL(); |
| result.SetStatus(eReturnStatusSuccessFinishResult); |
| } else { |
| result.AppendErrorWithFormat( |
| "Watchpoint creation failed (addr=0x%" PRIx64 ", size=%" PRIu64 |
| ", variable expression='%s').\n", |
| addr, (uint64_t)size, command.GetArgumentAtIndex(0)); |
| if (error.AsCString(nullptr)) |
| result.AppendError(error.AsCString()); |
| result.SetStatus(eReturnStatusFailed); |
| } |
| |
| return result.Succeeded(); |
| } |
| |
| private: |
| OptionGroupOptions m_option_group; |
| OptionGroupWatchpoint m_option_watchpoint; |
| }; |
| |
| //------------------------------------------------------------------------- |
| // CommandObjectWatchpointSetExpression |
| //------------------------------------------------------------------------- |
| #pragma mark Set |
| |
| class CommandObjectWatchpointSetExpression : public CommandObjectRaw { |
| public: |
| CommandObjectWatchpointSetExpression(CommandInterpreter &interpreter) |
| : CommandObjectRaw( |
| interpreter, "watchpoint set expression", |
| "Set a watchpoint on an address by supplying an expression. " |
| "Use the '-w' option to specify the type of watchpoint and " |
| "the '-s' option to specify the byte size to watch for. " |
| "If no '-w' option is specified, it defaults to write. " |
| "If no '-s' option is specified, it defaults to the target's " |
| "pointer byte size. " |
| "Note that there are limited hardware resources for watchpoints. " |
| "If watchpoint setting fails, consider disable/delete existing " |
| "ones " |
| "to free up resources.", |
| "", |
| eCommandRequiresFrame | eCommandTryTargetAPILock | |
| eCommandProcessMustBeLaunched | eCommandProcessMustBePaused), |
| m_option_group(), m_option_watchpoint() { |
| SetHelpLong( |
| R"( |
| Examples: |
| |
| (lldb) watchpoint set expression -w write -s 1 -- foo + 32 |
| |
| Watches write access for the 1-byte region pointed to by the address 'foo + 32')"); |
| |
| CommandArgumentEntry arg; |
| CommandArgumentData expression_arg; |
| |
| // Define the only variant of this arg. |
| expression_arg.arg_type = eArgTypeExpression; |
| expression_arg.arg_repetition = eArgRepeatPlain; |
| |
| // Push the only variant into the argument entry. |
| arg.push_back(expression_arg); |
| |
| // Push the data for the only argument into the m_arguments vector. |
| m_arguments.push_back(arg); |
| |
| // Absorb the '-w' and '-s' options into our option group. |
| m_option_group.Append(&m_option_watchpoint, LLDB_OPT_SET_ALL, |
| LLDB_OPT_SET_1); |
| m_option_group.Finalize(); |
| } |
| |
| ~CommandObjectWatchpointSetExpression() override = default; |
| |
| // Overrides base class's behavior where WantsCompletion = |
| // !WantsRawCommandString. |
| bool WantsCompletion() override { return true; } |
| |
| Options *GetOptions() override { return &m_option_group; } |
| |
| protected: |
| bool DoExecute(llvm::StringRef raw_command, |
| CommandReturnObject &result) override { |
| auto exe_ctx = GetCommandInterpreter().GetExecutionContext(); |
| m_option_group.NotifyOptionParsingStarting( |
| &exe_ctx); // This is a raw command, so notify the option group |
| |
| Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get(); |
| StackFrame *frame = m_exe_ctx.GetFramePtr(); |
| |
| OptionsWithRaw args(raw_command); |
| |
| llvm::StringRef expr = args.GetRawPart(); |
| |
| if (args.HasArgs()) |
| if (!ParseOptionsAndNotify(args.GetArgs(), result, m_option_group, |
| exe_ctx)) |
| return false; |
| |
| // If no argument is present, issue an error message. There's no way to |
| // set a watchpoint. |
| if (raw_command.trim().empty()) { |
| result.GetErrorStream().Printf("error: required argument missing; " |
| "specify an expression to evaulate into " |
| "the address to watch for\n"); |
| result.SetStatus(eReturnStatusFailed); |
| return false; |
| } |
| |
| // If no '-w' is specified, default to '-w write'. |
| if (!m_option_watchpoint.watch_type_specified) { |
| m_option_watchpoint.watch_type = OptionGroupWatchpoint::eWatchWrite; |
| } |
| |
| // We passed the sanity check for the command. Proceed to set the |
| // watchpoint now. |
| lldb::addr_t addr = 0; |
| size_t size = 0; |
| |
| ValueObjectSP valobj_sp; |
| |
| // Use expression evaluation to arrive at the address to watch. |
| EvaluateExpressionOptions options; |
| options.SetCoerceToId(false); |
| options.SetUnwindOnError(true); |
| options.SetKeepInMemory(false); |
| options.SetTryAllThreads(true); |
| options.SetTimeout(llvm::None); |
| |
| ExpressionResults expr_result = |
| target->EvaluateExpression(expr, frame, valobj_sp, options); |
| if (expr_result != eExpressionCompleted) { |
| result.GetErrorStream().Printf( |
| "error: expression evaluation of address to watch failed\n"); |
| result.GetErrorStream() << "expression evaluated: \n" << expr << "\n"; |
| result.SetStatus(eReturnStatusFailed); |
| return false; |
| } |
| |
| // Get the address to watch. |
| bool success = false; |
| addr = valobj_sp->GetValueAsUnsigned(0, &success); |
| if (!success) { |
| result.GetErrorStream().Printf( |
| "error: expression did not evaluate to an address\n"); |
| result.SetStatus(eReturnStatusFailed); |
| return false; |
| } |
| |
| if (m_option_watchpoint.watch_size != 0) |
| size = m_option_watchpoint.watch_size; |
| else |
| size = target->GetArchitecture().GetAddressByteSize(); |
| |
| // Now it's time to create the watchpoint. |
| uint32_t watch_type = m_option_watchpoint.watch_type; |
| |
| // Fetch the type from the value object, the type of the watched object is |
| // the pointee type |
| /// of the expression, so convert to that if we found a valid type. |
| CompilerType compiler_type(valobj_sp->GetCompilerType()); |
| |
| Status error; |
| Watchpoint *wp = |
| target->CreateWatchpoint(addr, size, &compiler_type, watch_type, error) |
| .get(); |
| if (wp) { |
| Stream &output_stream = result.GetOutputStream(); |
| output_stream.Printf("Watchpoint created: "); |
| wp->GetDescription(&output_stream, lldb::eDescriptionLevelFull); |
| output_stream.EOL(); |
| result.SetStatus(eReturnStatusSuccessFinishResult); |
| } else { |
| result.AppendErrorWithFormat("Watchpoint creation failed (addr=0x%" PRIx64 |
| ", size=%" PRIu64 ").\n", |
| addr, (uint64_t)size); |
| if (error.AsCString(nullptr)) |
| result.AppendError(error.AsCString()); |
| result.SetStatus(eReturnStatusFailed); |
| } |
| |
| return result.Succeeded(); |
| } |
| |
| private: |
| OptionGroupOptions m_option_group; |
| OptionGroupWatchpoint m_option_watchpoint; |
| }; |
| |
| //------------------------------------------------------------------------- |
| // CommandObjectWatchpointSet |
| //------------------------------------------------------------------------- |
| #pragma mark Set |
| |
| class CommandObjectWatchpointSet : public CommandObjectMultiword { |
| public: |
| CommandObjectWatchpointSet(CommandInterpreter &interpreter) |
| : CommandObjectMultiword( |
| interpreter, "watchpoint set", "Commands for setting a watchpoint.", |
| "watchpoint set <subcommand> [<subcommand-options>]") { |
| |
| LoadSubCommand( |
| "variable", |
| CommandObjectSP(new CommandObjectWatchpointSetVariable(interpreter))); |
| LoadSubCommand( |
| "expression", |
| CommandObjectSP(new CommandObjectWatchpointSetExpression(interpreter))); |
| } |
| |
| ~CommandObjectWatchpointSet() override = default; |
| }; |
| |
| //------------------------------------------------------------------------- |
| // CommandObjectMultiwordWatchpoint |
| //------------------------------------------------------------------------- |
| #pragma mark MultiwordWatchpoint |
| |
| CommandObjectMultiwordWatchpoint::CommandObjectMultiwordWatchpoint( |
| CommandInterpreter &interpreter) |
| : CommandObjectMultiword(interpreter, "watchpoint", |
| "Commands for operating on watchpoints.", |
| "watchpoint <subcommand> [<command-options>]") { |
| CommandObjectSP list_command_object( |
| new CommandObjectWatchpointList(interpreter)); |
| CommandObjectSP enable_command_object( |
| new CommandObjectWatchpointEnable(interpreter)); |
| CommandObjectSP disable_command_object( |
| new CommandObjectWatchpointDisable(interpreter)); |
| CommandObjectSP delete_command_object( |
| new CommandObjectWatchpointDelete(interpreter)); |
| CommandObjectSP ignore_command_object( |
| new CommandObjectWatchpointIgnore(interpreter)); |
| CommandObjectSP command_command_object( |
| new CommandObjectWatchpointCommand(interpreter)); |
| CommandObjectSP modify_command_object( |
| new CommandObjectWatchpointModify(interpreter)); |
| CommandObjectSP set_command_object( |
| new CommandObjectWatchpointSet(interpreter)); |
| |
| list_command_object->SetCommandName("watchpoint list"); |
| enable_command_object->SetCommandName("watchpoint enable"); |
| disable_command_object->SetCommandName("watchpoint disable"); |
| delete_command_object->SetCommandName("watchpoint delete"); |
| ignore_command_object->SetCommandName("watchpoint ignore"); |
| command_command_object->SetCommandName("watchpoint command"); |
| modify_command_object->SetCommandName("watchpoint modify"); |
| set_command_object->SetCommandName("watchpoint set"); |
| |
| LoadSubCommand("list", list_command_object); |
| LoadSubCommand("enable", enable_command_object); |
| LoadSubCommand("disable", disable_command_object); |
| LoadSubCommand("delete", delete_command_object); |
| LoadSubCommand("ignore", ignore_command_object); |
| LoadSubCommand("command", command_command_object); |
| LoadSubCommand("modify", modify_command_object); |
| LoadSubCommand("set", set_command_object); |
| } |
| |
| CommandObjectMultiwordWatchpoint::~CommandObjectMultiwordWatchpoint() = default; |
