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

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//===-- 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 "lldb/lldb-python.h"
#include "CommandObjectWatchpoint.h"
#include "CommandObjectWatchpointCommand.h"
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Breakpoint/Watchpoint.h"
#include "lldb/Breakpoint/WatchpointList.h"
#include "lldb/Core/StreamString.h"
#include "lldb/Core/ValueObject.h"
#include "lldb/Core/ValueObjectVariable.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/CommandReturnObject.h"
#include "lldb/Interpreter/CommandCompletions.h"
#include "lldb/Symbol/Variable.h"
#include "lldb/Symbol/VariableList.h"
#include "lldb/Target/Target.h"
#include "llvm/ADT/StringRef.h"
#include <vector>
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 == NULL)
{
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 == NULL)
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;
std::pair<llvm::StringRef, llvm::StringRef> Pair;
size_t i;
int32_t idx;
// Go through the argments and make a canonical form of arg list containing
// only numbers with possible "-" in between.
for (i = 0; i < args.GetArgumentCount(); ++i) {
llvm::StringRef Arg(args.GetArgumentAtIndex(i));
if ((idx = WithRSAIndex(Arg)) == -1) {
StrRefArgs.push_back(Arg);
continue;
}
// The Arg contains the range specifier, split it, then.
Pair = Arg.split(RSA[idx]);
if (!Pair.first.empty())
StrRefArgs.push_back(Pair.first);
StrRefArgs.push_back(Minus);
if (!Pair.second.empty())
StrRefArgs.push_back(Pair.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
//-------------------------------------------------------------------------
#pragma mark List
class CommandObjectWatchpointList : public CommandObjectParsed
{
public:
CommandObjectWatchpointList (CommandInterpreter &interpreter) :
CommandObjectParsed (interpreter,
"watchpoint list",
"List all watchpoints at configurable levels of detail.",
NULL),
m_options(interpreter)
{
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);
}
virtual
~CommandObjectWatchpointList () {}
virtual Options *
GetOptions ()
{
return &m_options;
}
class CommandOptions : public Options
{
public:
CommandOptions (CommandInterpreter &interpreter) :
Options(interpreter),
m_level(lldb::eDescriptionLevelBrief) // Watchpoint List defaults to brief descriptions
{
}
virtual
~CommandOptions () {}
virtual Error
SetOptionValue (uint32_t option_idx, const char *option_arg)
{
Error 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 ()
{
m_level = lldb::eDescriptionLevelFull;
}
const OptionDefinition *
GetDefinitions ()
{
return g_option_table;
}
// Options table: Required for subclasses of Options.
static OptionDefinition g_option_table[];
// Instance variables to hold the values for command options.
lldb::DescriptionLevel m_level;
};
protected:
virtual bool
DoExecute (Args& command, CommandReturnObject &result)
{
Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get();
if (target == NULL)
{
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;
Error 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();
Mutex::Locker locker;
target->GetWatchpointList().GetListMutex(locker);
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;
};
//-------------------------------------------------------------------------
// CommandObjectWatchpointList::Options
//-------------------------------------------------------------------------
#pragma mark List::CommandOptions
OptionDefinition
CommandObjectWatchpointList::CommandOptions::g_option_table[] =
{
{ LLDB_OPT_SET_1, false, "brief", 'b', OptionParser::eNoArgument, NULL, NULL, 0, eArgTypeNone,
"Give a brief description of the watchpoint (no location info)."},
{ LLDB_OPT_SET_2, false, "full", 'f', OptionParser::eNoArgument, NULL, NULL, 0, eArgTypeNone,
"Give a full description of the watchpoint and its locations."},
{ LLDB_OPT_SET_3, false, "verbose", 'v', OptionParser::eNoArgument, NULL, NULL, 0, eArgTypeNone,
"Explain everything we know about the watchpoint (for debugging debugger bugs)." },
{ 0, false, NULL, 0, 0, NULL, NULL, 0, eArgTypeNone, NULL }
};
//-------------------------------------------------------------------------
// 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.",
NULL)
{
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);
}
virtual
~CommandObjectWatchpointEnable () {}
protected:
virtual bool
DoExecute (Args& command,
CommandReturnObject &result)
{
Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get();
if (!CheckTargetForWatchpointOperations(target, result))
return false;
Mutex::Locker locker;
target->GetWatchpointList().GetListMutex(locker);
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();
}
private:
};
//-------------------------------------------------------------------------
// 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.",
NULL)
{
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);
}
virtual
~CommandObjectWatchpointDisable () {}
protected:
virtual bool
DoExecute (Args& command, CommandReturnObject &result)
{
Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get();
if (!CheckTargetForWatchpointOperations(target, result))
return false;
Mutex::Locker locker;
target->GetWatchpointList().GetListMutex(locker);
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.",
NULL)
{
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);
}
virtual
~CommandObjectWatchpointDelete () {}
protected:
virtual bool
DoExecute (Args& command, CommandReturnObject &result)
{
Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get();
if (!CheckTargetForWatchpointOperations(target, result))
return false;
Mutex::Locker locker;
target->GetWatchpointList().GetListMutex(locker);
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
//-------------------------------------------------------------------------
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.",
NULL),
m_options (interpreter)
{
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);
}
virtual
~CommandObjectWatchpointIgnore () {}
virtual Options *
GetOptions ()
{
return &m_options;
}
class CommandOptions : public Options
{
public:
CommandOptions (CommandInterpreter &interpreter) :
Options (interpreter),
m_ignore_count (0)
{
}
virtual
~CommandOptions () {}
virtual Error
SetOptionValue (uint32_t option_idx, const char *option_arg)
{
Error error;
const int short_option = m_getopt_table[option_idx].val;
switch (short_option)
{
case 'i':
{
m_ignore_count = Args::StringToUInt32(option_arg, UINT32_MAX, 0);
if (m_ignore_count == UINT32_MAX)
error.SetErrorStringWithFormat ("invalid ignore count '%s'", option_arg);
}
break;
default:
error.SetErrorStringWithFormat ("unrecognized option '%c'", short_option);
break;
}
return error;
}
void
OptionParsingStarting ()
{
m_ignore_count = 0;
}
const OptionDefinition *
GetDefinitions ()
{
return g_option_table;
}
// Options table: Required for subclasses of Options.
static OptionDefinition g_option_table[];
// Instance variables to hold the values for command options.
uint32_t m_ignore_count;
};
protected:
virtual bool
DoExecute (Args& command,
CommandReturnObject &result)
{
Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get();
if (!CheckTargetForWatchpointOperations(target, result))
return false;
Mutex::Locker locker;
target->GetWatchpointList().GetListMutex(locker);
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;
};
#pragma mark Ignore::CommandOptions
OptionDefinition
CommandObjectWatchpointIgnore::CommandOptions::g_option_table[] =
{
{ LLDB_OPT_SET_ALL, true, "ignore-count", 'i', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypeCount, "Set the number of times this watchpoint is skipped before stopping." },
{ 0, false, NULL, 0 , 0, NULL, NULL, 0, eArgTypeNone, NULL }
};
//-------------------------------------------------------------------------
// CommandObjectWatchpointModify
//-------------------------------------------------------------------------
#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.",
NULL),
m_options (interpreter)
{
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);
}
virtual
~CommandObjectWatchpointModify () {}
virtual Options *
GetOptions ()
{
return &m_options;
}
class CommandOptions : public Options
{
public:
CommandOptions (CommandInterpreter &interpreter) :
Options (interpreter),
m_condition (),
m_condition_passed (false)
{
}
virtual
~CommandOptions () {}
virtual Error
SetOptionValue (uint32_t option_idx, const char *option_arg)
{
Error error;
const int short_option = m_getopt_table[option_idx].val;
switch (short_option)
{
case 'c':
if (option_arg != NULL)
m_condition.assign (option_arg);
else
m_condition.clear();
m_condition_passed = true;
break;
default:
error.SetErrorStringWithFormat ("unrecognized option '%c'", short_option);
break;
}
return error;
}
void
OptionParsingStarting ()
{
m_condition.clear();
m_condition_passed = false;
}
const OptionDefinition*
GetDefinitions ()
{
return g_option_table;
}
// Options table: Required for subclasses of Options.
static OptionDefinition g_option_table[];
// Instance variables to hold the values for command options.
std::string m_condition;
bool m_condition_passed;
};
protected:
virtual bool
DoExecute (Args& command, CommandReturnObject &result)
{
Target *target = m_interpreter.GetDebugger().GetSelectedTarget().get();
if (!CheckTargetForWatchpointOperations(target, result))
return false;
Mutex::Locker locker;
target->GetWatchpointList().GetListMutex(locker);
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;
};
#pragma mark Modify::CommandOptions
OptionDefinition
CommandObjectWatchpointModify::CommandOptions::g_option_table[] =
{
{ LLDB_OPT_SET_ALL, false, "condition", 'c', OptionParser::eRequiredArgument, NULL, NULL, 0, eArgTypeExpression, "The watchpoint stops only if this condition expression evaluates to true."},
{ 0, false, NULL, 0 , 0, NULL, NULL, 0, eArgTypeNone, NULL }
};
//-------------------------------------------------------------------------
// 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 '-x' option to specify the byte size to watch for. "
"If no '-w' option is specified, it defaults to write. "
"If no '-x' 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.",
NULL,
eFlagRequiresFrame |
eFlagTryTargetAPILock |
eFlagProcessMustBeLaunched |
eFlagProcessMustBePaused ),
m_option_group (interpreter),
m_option_watchpoint ()
{
SetHelpLong(
"Examples: \n\
\n\
watchpoint set variable -w read_write my_global_var \n\
# Watch my_global_var for read/write access, with the region to watch corresponding to the byte size of the data type.\n");
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 '-x' options into our option group.
m_option_group.Append (&m_option_watchpoint, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1);
m_option_group.Finalize();
}
virtual
~CommandObjectWatchpointSetVariable () {}
virtual Options *
GetOptions ()
{
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;
}
virtual bool
DoExecute (Args& command, CommandReturnObject &result)
{
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...
Error 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;
Error 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);
}
ClangASTType clang_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;
}
clang_type = valobj_sp->GetClangType();
}
else
{
const char *error_cstr = error.AsCString(NULL);
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, &clang_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(NULL))
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 '-x' option to specify the byte size to watch for. "
"If no '-w' option is specified, it defaults to write. "
"If no '-x' 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.",
NULL,
eFlagRequiresFrame |
eFlagTryTargetAPILock |
eFlagProcessMustBeLaunched |
eFlagProcessMustBePaused ),
m_option_group (interpreter),
m_option_watchpoint ()
{
SetHelpLong(
"Examples: \n\
\n\
watchpoint set expression -w write -x 1 -- foo + 32\n\
# Watch write access for the 1-byte region pointed to by the address 'foo + 32'.\n");
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 '-x' options into our option group.
m_option_group.Append (&m_option_watchpoint, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1);
m_option_group.Finalize();
}
virtual
~CommandObjectWatchpointSetExpression () {}
// Overrides base class's behavior where WantsCompletion = !WantsRawCommandString.
virtual bool
WantsCompletion() { return true; }
virtual Options *
GetOptions ()
{
return &m_option_group;
}
protected:
virtual bool
DoExecute (const char *raw_command, CommandReturnObject &result)
{
m_option_group.NotifyOptionParsingStarting(); // 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 = NULL;
if (raw_command[0] == '-')
{
// We have some options and these options MUST end with --.
const char *end_options = NULL;
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 (raw_command, end_options - raw_command);
if (!ParseOptions (args, result))
return false;
Error error (m_option_group.NotifyOptionParsingFinished());
if (error.Fail())
{
result.AppendError (error.AsCString());
result.SetStatus (eReturnStatusFailed);
return false;
}
}
}
if (expr == NULL)
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.SetTimeoutUsec(0);
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.
ClangASTType clang_type(valobj_sp->GetClangType());
Error error;
Watchpoint *wp = target->CreateWatchpoint(addr, size, &clang_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(NULL))
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",
"A set of commands for setting a watchpoint.",
"watchpoint set <subcommand> [<subcommand-options>]")
{
LoadSubCommand ("variable", CommandObjectSP (new CommandObjectWatchpointSetVariable (interpreter)));
LoadSubCommand ("expression", CommandObjectSP (new CommandObjectWatchpointSetExpression (interpreter)));
}
virtual
~CommandObjectWatchpointSet () {}
};
//-------------------------------------------------------------------------
// CommandObjectMultiwordWatchpoint
//-------------------------------------------------------------------------
#pragma mark MultiwordWatchpoint
CommandObjectMultiwordWatchpoint::CommandObjectMultiwordWatchpoint(CommandInterpreter &interpreter) :
CommandObjectMultiword (interpreter,
"watchpoint",
"A set of commands for operating on watchpoints.",
"watchpoint <command> [<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()
{
}
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