forked from OSchip/llvm-project
1235 lines
44 KiB
C++
1235 lines
44 KiB
C++
//===-- CommandObjectWatchpoint.cpp -----------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "CommandObjectWatchpoint.h"
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#include "CommandObjectWatchpointCommand.h"
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// C Includes
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// C++ Includes
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#include <vector>
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// Other libraries and framework includes
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#include "llvm/ADT/StringRef.h"
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// Project includes
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#include "lldb/Breakpoint/Watchpoint.h"
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#include "lldb/Breakpoint/WatchpointList.h"
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#include "lldb/Core/ValueObject.h"
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#include "lldb/Core/ValueObjectVariable.h"
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#include "lldb/Host/OptionParser.h"
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#include "lldb/Interpreter/CommandCompletions.h"
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#include "lldb/Interpreter/CommandInterpreter.h"
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#include "lldb/Interpreter/CommandReturnObject.h"
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#include "lldb/Symbol/Variable.h"
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#include "lldb/Symbol/VariableList.h"
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#include "lldb/Target/StackFrame.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Utility/StreamString.h"
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using namespace lldb;
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using namespace lldb_private;
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static void AddWatchpointDescription(Stream *s, Watchpoint *wp,
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lldb::DescriptionLevel level) {
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s->IndentMore();
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wp->GetDescription(s, level);
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s->IndentLess();
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s->EOL();
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}
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static bool CheckTargetForWatchpointOperations(Target *target,
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CommandReturnObject &result) {
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if (target == nullptr) {
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result.AppendError("Invalid target. No existing target or watchpoints.");
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result.SetStatus(eReturnStatusFailed);
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return false;
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}
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bool process_is_valid =
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target->GetProcessSP() && target->GetProcessSP()->IsAlive();
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if (!process_is_valid) {
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result.AppendError("Thre's no process or it is not alive.");
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result.SetStatus(eReturnStatusFailed);
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return false;
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}
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// Target passes our checks, return true.
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return true;
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}
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// Equivalent class: {"-", "to", "To", "TO"} of range specifier array.
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static const char *RSA[4] = {"-", "to", "To", "TO"};
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// Return the index to RSA if found; otherwise -1 is returned.
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static int32_t WithRSAIndex(llvm::StringRef Arg) {
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uint32_t i;
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for (i = 0; i < 4; ++i)
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if (Arg.find(RSA[i]) != llvm::StringRef::npos)
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return i;
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return -1;
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}
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// Return true if wp_ids is successfully populated with the watch ids.
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// False otherwise.
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bool CommandObjectMultiwordWatchpoint::VerifyWatchpointIDs(
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Target *target, Args &args, std::vector<uint32_t> &wp_ids) {
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// Pre-condition: args.GetArgumentCount() > 0.
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if (args.GetArgumentCount() == 0) {
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if (target == nullptr)
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return false;
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WatchpointSP watch_sp = target->GetLastCreatedWatchpoint();
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if (watch_sp) {
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wp_ids.push_back(watch_sp->GetID());
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return true;
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} else
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return false;
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}
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llvm::StringRef Minus("-");
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std::vector<llvm::StringRef> StrRefArgs;
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llvm::StringRef first;
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llvm::StringRef second;
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size_t i;
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int32_t idx;
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// Go through the arguments and make a canonical form of arg list containing
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// only numbers with possible "-" in between.
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for (auto &entry : args.entries()) {
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if ((idx = WithRSAIndex(entry.ref)) == -1) {
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StrRefArgs.push_back(entry.ref);
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continue;
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}
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// The Arg contains the range specifier, split it, then.
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std::tie(first, second) = entry.ref.split(RSA[idx]);
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if (!first.empty())
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StrRefArgs.push_back(first);
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StrRefArgs.push_back(Minus);
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if (!second.empty())
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StrRefArgs.push_back(second);
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}
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// Now process the canonical list and fill in the vector of uint32_t's.
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// If there is any error, return false and the client should ignore wp_ids.
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uint32_t beg, end, id;
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size_t size = StrRefArgs.size();
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bool in_range = false;
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for (i = 0; i < size; ++i) {
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llvm::StringRef Arg = StrRefArgs[i];
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if (in_range) {
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// Look for the 'end' of the range. Note StringRef::getAsInteger()
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// returns true to signify error while parsing.
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if (Arg.getAsInteger(0, end))
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return false;
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// Found a range! Now append the elements.
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for (id = beg; id <= end; ++id)
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wp_ids.push_back(id);
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in_range = false;
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continue;
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}
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if (i < (size - 1) && StrRefArgs[i + 1] == Minus) {
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if (Arg.getAsInteger(0, beg))
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return false;
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// Turn on the in_range flag, we are looking for end of range next.
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++i;
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in_range = true;
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continue;
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}
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// Otherwise, we have a simple ID. Just append it.
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if (Arg.getAsInteger(0, beg))
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return false;
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wp_ids.push_back(beg);
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}
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// It is an error if after the loop, we're still in_range.
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if (in_range)
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return false;
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return true; // Success!
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}
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//-------------------------------------------------------------------------
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// CommandObjectWatchpointList
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//-------------------------------------------------------------------------
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//-------------------------------------------------------------------------
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// CommandObjectWatchpointList::Options
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//-------------------------------------------------------------------------
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#pragma mark List::CommandOptions
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static OptionDefinition g_watchpoint_list_options[] = {
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// clang-format off
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{ LLDB_OPT_SET_1, false, "brief", 'b', OptionParser::eNoArgument, nullptr, nullptr, 0, eArgTypeNone, "Give a brief description of the watchpoint (no location info)." },
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{ LLDB_OPT_SET_2, false, "full", 'f', OptionParser::eNoArgument, nullptr, nullptr, 0, eArgTypeNone, "Give a full description of the watchpoint and its locations." },
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{ LLDB_OPT_SET_3, false, "verbose", 'v', OptionParser::eNoArgument, nullptr, nullptr, 0, eArgTypeNone, "Explain everything we know about the watchpoint (for debugging debugger bugs)." }
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// clang-format on
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};
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#pragma mark List
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class CommandObjectWatchpointList : public CommandObjectParsed {
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public:
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CommandObjectWatchpointList(CommandInterpreter &interpreter)
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: CommandObjectParsed(
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interpreter, "watchpoint list",
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"List all watchpoints at configurable levels of detail.", nullptr),
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m_options() {
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CommandArgumentEntry arg;
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CommandObject::AddIDsArgumentData(arg, eArgTypeWatchpointID,
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eArgTypeWatchpointIDRange);
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// Add the entry for the first argument for this command to the object's
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// arguments vector.
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m_arguments.push_back(arg);
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}
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~CommandObjectWatchpointList() override = default;
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Options *GetOptions() override { return &m_options; }
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class CommandOptions : public Options {
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public:
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CommandOptions()
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: Options(),
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m_level(lldb::eDescriptionLevelBrief) // Watchpoint List defaults to
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// brief descriptions
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{}
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~CommandOptions() override = default;
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Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_arg,
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ExecutionContext *execution_context) override {
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Status error;
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const int short_option = m_getopt_table[option_idx].val;
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switch (short_option) {
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case 'b':
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m_level = lldb::eDescriptionLevelBrief;
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break;
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case 'f':
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m_level = lldb::eDescriptionLevelFull;
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break;
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case 'v':
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m_level = lldb::eDescriptionLevelVerbose;
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break;
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default:
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error.SetErrorStringWithFormat("unrecognized option '%c'",
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short_option);
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break;
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}
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return error;
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}
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void OptionParsingStarting(ExecutionContext *execution_context) override {
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m_level = lldb::eDescriptionLevelFull;
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}
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llvm::ArrayRef<OptionDefinition> GetDefinitions() override {
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return llvm::makeArrayRef(g_watchpoint_list_options);
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}
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// Instance variables to hold the values for command options.
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lldb::DescriptionLevel m_level;
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};
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protected:
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bool DoExecute(Args &command, CommandReturnObject &result) override {
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Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get();
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if (target == nullptr) {
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result.AppendError("Invalid target. No current target or watchpoints.");
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result.SetStatus(eReturnStatusSuccessFinishNoResult);
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return true;
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}
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if (target->GetProcessSP() && target->GetProcessSP()->IsAlive()) {
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uint32_t num_supported_hardware_watchpoints;
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Status error = target->GetProcessSP()->GetWatchpointSupportInfo(
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num_supported_hardware_watchpoints);
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if (error.Success())
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result.AppendMessageWithFormat(
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"Number of supported hardware watchpoints: %u\n",
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num_supported_hardware_watchpoints);
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}
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const WatchpointList &watchpoints = target->GetWatchpointList();
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std::unique_lock<std::recursive_mutex> lock;
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target->GetWatchpointList().GetListMutex(lock);
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size_t num_watchpoints = watchpoints.GetSize();
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if (num_watchpoints == 0) {
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result.AppendMessage("No watchpoints currently set.");
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result.SetStatus(eReturnStatusSuccessFinishNoResult);
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return true;
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}
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Stream &output_stream = result.GetOutputStream();
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if (command.GetArgumentCount() == 0) {
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// No watchpoint selected; show info about all currently set watchpoints.
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result.AppendMessage("Current watchpoints:");
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for (size_t i = 0; i < num_watchpoints; ++i) {
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Watchpoint *wp = watchpoints.GetByIndex(i).get();
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AddWatchpointDescription(&output_stream, wp, m_options.m_level);
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}
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result.SetStatus(eReturnStatusSuccessFinishNoResult);
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} else {
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// Particular watchpoints selected; enable them.
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std::vector<uint32_t> wp_ids;
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if (!CommandObjectMultiwordWatchpoint::VerifyWatchpointIDs(
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target, command, wp_ids)) {
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result.AppendError("Invalid watchpoints specification.");
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result.SetStatus(eReturnStatusFailed);
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return false;
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}
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const size_t size = wp_ids.size();
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for (size_t i = 0; i < size; ++i) {
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Watchpoint *wp = watchpoints.FindByID(wp_ids[i]).get();
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if (wp)
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AddWatchpointDescription(&output_stream, wp, m_options.m_level);
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result.SetStatus(eReturnStatusSuccessFinishNoResult);
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}
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}
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return result.Succeeded();
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}
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private:
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CommandOptions m_options;
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};
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//-------------------------------------------------------------------------
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// CommandObjectWatchpointEnable
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//-------------------------------------------------------------------------
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#pragma mark Enable
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class CommandObjectWatchpointEnable : public CommandObjectParsed {
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public:
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CommandObjectWatchpointEnable(CommandInterpreter &interpreter)
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: CommandObjectParsed(interpreter, "enable",
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"Enable the specified disabled watchpoint(s). If "
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"no watchpoints are specified, enable all of them.",
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nullptr) {
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CommandArgumentEntry arg;
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CommandObject::AddIDsArgumentData(arg, eArgTypeWatchpointID,
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eArgTypeWatchpointIDRange);
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// Add the entry for the first argument for this command to the object's
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// arguments vector.
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m_arguments.push_back(arg);
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}
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~CommandObjectWatchpointEnable() override = default;
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protected:
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bool DoExecute(Args &command, CommandReturnObject &result) override {
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Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get();
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if (!CheckTargetForWatchpointOperations(target, result))
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return false;
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std::unique_lock<std::recursive_mutex> lock;
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target->GetWatchpointList().GetListMutex(lock);
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const WatchpointList &watchpoints = target->GetWatchpointList();
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size_t num_watchpoints = watchpoints.GetSize();
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if (num_watchpoints == 0) {
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result.AppendError("No watchpoints exist to be enabled.");
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result.SetStatus(eReturnStatusFailed);
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return false;
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}
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if (command.GetArgumentCount() == 0) {
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// No watchpoint selected; enable all currently set watchpoints.
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target->EnableAllWatchpoints();
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result.AppendMessageWithFormat("All watchpoints enabled. (%" PRIu64
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" watchpoints)\n",
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(uint64_t)num_watchpoints);
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result.SetStatus(eReturnStatusSuccessFinishNoResult);
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} else {
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// Particular watchpoints selected; enable them.
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std::vector<uint32_t> wp_ids;
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if (!CommandObjectMultiwordWatchpoint::VerifyWatchpointIDs(
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target, command, wp_ids)) {
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result.AppendError("Invalid watchpoints specification.");
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result.SetStatus(eReturnStatusFailed);
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return false;
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}
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int count = 0;
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const size_t size = wp_ids.size();
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for (size_t i = 0; i < size; ++i)
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if (target->EnableWatchpointByID(wp_ids[i]))
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++count;
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result.AppendMessageWithFormat("%d watchpoints enabled.\n", count);
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result.SetStatus(eReturnStatusSuccessFinishNoResult);
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}
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return result.Succeeded();
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}
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};
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//-------------------------------------------------------------------------
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// CommandObjectWatchpointDisable
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//-------------------------------------------------------------------------
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#pragma mark Disable
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class CommandObjectWatchpointDisable : public CommandObjectParsed {
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public:
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CommandObjectWatchpointDisable(CommandInterpreter &interpreter)
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: CommandObjectParsed(interpreter, "watchpoint disable",
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"Disable the specified watchpoint(s) without "
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"removing it/them. If no watchpoints are "
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"specified, disable them all.",
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nullptr) {
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CommandArgumentEntry arg;
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CommandObject::AddIDsArgumentData(arg, eArgTypeWatchpointID,
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eArgTypeWatchpointIDRange);
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// Add the entry for the first argument for this command to the object's
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// arguments vector.
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m_arguments.push_back(arg);
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}
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~CommandObjectWatchpointDisable() override = default;
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protected:
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bool DoExecute(Args &command, CommandReturnObject &result) override {
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Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get();
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if (!CheckTargetForWatchpointOperations(target, result))
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return false;
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std::unique_lock<std::recursive_mutex> lock;
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target->GetWatchpointList().GetListMutex(lock);
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const WatchpointList &watchpoints = target->GetWatchpointList();
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size_t num_watchpoints = watchpoints.GetSize();
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if (num_watchpoints == 0) {
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result.AppendError("No watchpoints exist to be disabled.");
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result.SetStatus(eReturnStatusFailed);
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return false;
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}
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if (command.GetArgumentCount() == 0) {
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// No watchpoint selected; disable all currently set watchpoints.
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if (target->DisableAllWatchpoints()) {
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result.AppendMessageWithFormat("All watchpoints disabled. (%" PRIu64
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" watchpoints)\n",
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(uint64_t)num_watchpoints);
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result.SetStatus(eReturnStatusSuccessFinishNoResult);
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} else {
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result.AppendError("Disable all watchpoints failed\n");
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result.SetStatus(eReturnStatusFailed);
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}
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} else {
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// Particular watchpoints selected; disable them.
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std::vector<uint32_t> wp_ids;
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if (!CommandObjectMultiwordWatchpoint::VerifyWatchpointIDs(
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target, command, wp_ids)) {
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result.AppendError("Invalid watchpoints specification.");
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result.SetStatus(eReturnStatusFailed);
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return false;
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}
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int count = 0;
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const size_t size = wp_ids.size();
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for (size_t i = 0; i < size; ++i)
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if (target->DisableWatchpointByID(wp_ids[i]))
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++count;
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result.AppendMessageWithFormat("%d watchpoints disabled.\n", count);
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result.SetStatus(eReturnStatusSuccessFinishNoResult);
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}
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return result.Succeeded();
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}
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};
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//-------------------------------------------------------------------------
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// CommandObjectWatchpointDelete
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//-------------------------------------------------------------------------
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#pragma mark Delete
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class CommandObjectWatchpointDelete : public CommandObjectParsed {
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public:
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CommandObjectWatchpointDelete(CommandInterpreter &interpreter)
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: CommandObjectParsed(interpreter, "watchpoint delete",
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"Delete the specified watchpoint(s). If no "
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"watchpoints are specified, delete them all.",
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nullptr) {
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CommandArgumentEntry arg;
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CommandObject::AddIDsArgumentData(arg, eArgTypeWatchpointID,
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eArgTypeWatchpointIDRange);
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// Add the entry for the first argument for this command to the object's
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// arguments vector.
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m_arguments.push_back(arg);
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}
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~CommandObjectWatchpointDelete() override = default;
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protected:
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bool DoExecute(Args &command, CommandReturnObject &result) override {
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Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get();
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if (!CheckTargetForWatchpointOperations(target, result))
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return false;
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std::unique_lock<std::recursive_mutex> lock;
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target->GetWatchpointList().GetListMutex(lock);
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const WatchpointList &watchpoints = target->GetWatchpointList();
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size_t num_watchpoints = watchpoints.GetSize();
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if (num_watchpoints == 0) {
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result.AppendError("No watchpoints exist to be deleted.");
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result.SetStatus(eReturnStatusFailed);
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return false;
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}
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if (command.GetArgumentCount() == 0) {
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if (!m_interpreter.Confirm(
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"About to delete all watchpoints, do you want to do that?",
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true)) {
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result.AppendMessage("Operation cancelled...");
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} else {
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target->RemoveAllWatchpoints();
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result.AppendMessageWithFormat("All watchpoints removed. (%" PRIu64
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" watchpoints)\n",
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(uint64_t)num_watchpoints);
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}
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result.SetStatus(eReturnStatusSuccessFinishNoResult);
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} else {
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// Particular watchpoints selected; delete them.
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std::vector<uint32_t> wp_ids;
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if (!CommandObjectMultiwordWatchpoint::VerifyWatchpointIDs(
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target, command, wp_ids)) {
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result.AppendError("Invalid watchpoints specification.");
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result.SetStatus(eReturnStatusFailed);
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return false;
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}
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int count = 0;
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const size_t size = wp_ids.size();
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for (size_t i = 0; i < size; ++i)
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|
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), true,
|
|
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(const char *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();
|
|
|
|
Args command(raw_command);
|
|
const char *expr = nullptr;
|
|
if (raw_command[0] == '-') {
|
|
// We have some options and these options MUST end with --.
|
|
const char *end_options = nullptr;
|
|
const char *s = raw_command;
|
|
while (s && s[0]) {
|
|
end_options = ::strstr(s, "--");
|
|
if (end_options) {
|
|
end_options += 2; // Get past the "--"
|
|
if (::isspace(end_options[0])) {
|
|
expr = end_options;
|
|
while (::isspace(*expr))
|
|
++expr;
|
|
break;
|
|
}
|
|
}
|
|
s = end_options;
|
|
}
|
|
|
|
if (end_options) {
|
|
Args args(llvm::StringRef(raw_command, end_options - raw_command));
|
|
if (!ParseOptions(args, result))
|
|
return false;
|
|
|
|
Status error(m_option_group.NotifyOptionParsingFinished(&exe_ctx));
|
|
if (error.Fail()) {
|
|
result.AppendError(error.AsCString());
|
|
result.SetStatus(eReturnStatusFailed);
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (expr == nullptr)
|
|
expr = raw_command;
|
|
|
|
// 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 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().Printf("expression evaluated: %s\n", expr);
|
|
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;
|