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llvm-project/lldb/source/Breakpoint/Breakpoint.cpp

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//===-- Breakpoint.cpp ----------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/Casting.h"
#include "lldb/Breakpoint/Breakpoint.h"
#include "lldb/Breakpoint/BreakpointLocation.h"
#include "lldb/Breakpoint/BreakpointLocationCollection.h"
#include "lldb/Breakpoint/BreakpointPrecondition.h"
#include "lldb/Breakpoint/BreakpointResolver.h"
#include "lldb/Breakpoint/BreakpointResolverFileLine.h"
#include "lldb/Core/Address.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleList.h"
#include "lldb/Core/SearchFilter.h"
#include "lldb/Core/Section.h"
#include "lldb/Target/SectionLoadList.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/Function.h"
#include "lldb/Symbol/Symbol.h"
#include "lldb/Symbol/SymbolContext.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/ThreadSpec.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/Stream.h"
#include "lldb/Utility/StreamString.h"
#include <memory>
using namespace lldb;
using namespace lldb_private;
using namespace llvm;
ConstString Breakpoint::GetEventIdentifier() {
static ConstString g_identifier("event-identifier.breakpoint.changed");
return g_identifier;
}
const char *Breakpoint::g_option_names[static_cast<uint32_t>(
Breakpoint::OptionNames::LastOptionName)]{"Names", "Hardware"};
// Breakpoint constructor
Breakpoint::Breakpoint(Target &target, SearchFilterSP &filter_sp,
BreakpointResolverSP &resolver_sp, bool hardware,
bool resolve_indirect_symbols)
: m_being_created(true), m_hardware(hardware), m_target(target),
m_filter_sp(filter_sp), m_resolver_sp(resolver_sp),
m_options_up(new BreakpointOptions(true)), m_locations(*this),
m_resolve_indirect_symbols(resolve_indirect_symbols), m_hit_counter() {
m_being_created = false;
}
Breakpoint::Breakpoint(Target &new_target, const Breakpoint &source_bp)
: m_being_created(true), m_hardware(source_bp.m_hardware),
m_target(new_target), m_name_list(source_bp.m_name_list),
m_options_up(new BreakpointOptions(*source_bp.m_options_up)),
m_locations(*this),
m_resolve_indirect_symbols(source_bp.m_resolve_indirect_symbols),
m_hit_counter() {}
// Destructor
Breakpoint::~Breakpoint() = default;
BreakpointSP Breakpoint::CopyFromBreakpoint(TargetSP new_target,
const Breakpoint& bp_to_copy_from) {
if (!new_target)
return BreakpointSP();
BreakpointSP bp(new Breakpoint(*new_target, bp_to_copy_from));
// Now go through and copy the filter & resolver:
bp->m_resolver_sp = bp_to_copy_from.m_resolver_sp->CopyForBreakpoint(bp);
bp->m_filter_sp = bp_to_copy_from.m_filter_sp->CreateCopy(new_target);
return bp;
}
// Serialization
StructuredData::ObjectSP Breakpoint::SerializeToStructuredData() {
// Serialize the resolver:
StructuredData::DictionarySP breakpoint_dict_sp(
new StructuredData::Dictionary());
StructuredData::DictionarySP breakpoint_contents_sp(
new StructuredData::Dictionary());
if (!m_name_list.empty()) {
StructuredData::ArraySP names_array_sp(new StructuredData::Array());
for (auto name : m_name_list) {
names_array_sp->AddItem(
StructuredData::StringSP(new StructuredData::String(name)));
}
breakpoint_contents_sp->AddItem(Breakpoint::GetKey(OptionNames::Names),
names_array_sp);
}
breakpoint_contents_sp->AddBooleanItem(
Breakpoint::GetKey(OptionNames::Hardware), m_hardware);
StructuredData::ObjectSP resolver_dict_sp(
m_resolver_sp->SerializeToStructuredData());
if (!resolver_dict_sp)
return StructuredData::ObjectSP();
breakpoint_contents_sp->AddItem(BreakpointResolver::GetSerializationKey(),
resolver_dict_sp);
StructuredData::ObjectSP filter_dict_sp(
m_filter_sp->SerializeToStructuredData());
if (!filter_dict_sp)
return StructuredData::ObjectSP();
breakpoint_contents_sp->AddItem(SearchFilter::GetSerializationKey(),
filter_dict_sp);
StructuredData::ObjectSP options_dict_sp(
m_options_up->SerializeToStructuredData());
if (!options_dict_sp)
return StructuredData::ObjectSP();
breakpoint_contents_sp->AddItem(BreakpointOptions::GetSerializationKey(),
options_dict_sp);
breakpoint_dict_sp->AddItem(GetSerializationKey(), breakpoint_contents_sp);
return breakpoint_dict_sp;
}
lldb::BreakpointSP Breakpoint::CreateFromStructuredData(
TargetSP target_sp, StructuredData::ObjectSP &object_data, Status &error) {
BreakpointSP result_sp;
if (!target_sp)
return result_sp;
StructuredData::Dictionary *breakpoint_dict = object_data->GetAsDictionary();
if (!breakpoint_dict || !breakpoint_dict->IsValid()) {
error.SetErrorString("Can't deserialize from an invalid data object.");
return result_sp;
}
StructuredData::Dictionary *resolver_dict;
bool success = breakpoint_dict->GetValueForKeyAsDictionary(
BreakpointResolver::GetSerializationKey(), resolver_dict);
if (!success) {
error.SetErrorString("Breakpoint data missing toplevel resolver key");
return result_sp;
}
Status create_error;
BreakpointResolverSP resolver_sp =
BreakpointResolver::CreateFromStructuredData(*resolver_dict,
create_error);
if (create_error.Fail()) {
error.SetErrorStringWithFormat(
"Error creating breakpoint resolver from data: %s.",
create_error.AsCString());
return result_sp;
}
StructuredData::Dictionary *filter_dict;
success = breakpoint_dict->GetValueForKeyAsDictionary(
SearchFilter::GetSerializationKey(), filter_dict);
SearchFilterSP filter_sp;
if (!success)
filter_sp =
std::make_shared<SearchFilterForUnconstrainedSearches>(target_sp);
else {
filter_sp = SearchFilter::CreateFromStructuredData(target_sp, *filter_dict,
create_error);
if (create_error.Fail()) {
error.SetErrorStringWithFormat(
"Error creating breakpoint filter from data: %s.",
create_error.AsCString());
return result_sp;
}
}
std::unique_ptr<BreakpointOptions> options_up;
StructuredData::Dictionary *options_dict;
Target& target = *target_sp;
success = breakpoint_dict->GetValueForKeyAsDictionary(
BreakpointOptions::GetSerializationKey(), options_dict);
if (success) {
options_up = BreakpointOptions::CreateFromStructuredData(
target, *options_dict, create_error);
if (create_error.Fail()) {
error.SetErrorStringWithFormat(
"Error creating breakpoint options from data: %s.",
create_error.AsCString());
return result_sp;
}
}
bool hardware = false;
success = breakpoint_dict->GetValueForKeyAsBoolean(
Breakpoint::GetKey(OptionNames::Hardware), hardware);
result_sp = target.CreateBreakpoint(filter_sp, resolver_sp, false,
hardware, true);
if (result_sp && options_up) {
result_sp->m_options_up = std::move(options_up);
}
StructuredData::Array *names_array;
success = breakpoint_dict->GetValueForKeyAsArray(
Breakpoint::GetKey(OptionNames::Names), names_array);
if (success && names_array) {
size_t num_names = names_array->GetSize();
for (size_t i = 0; i < num_names; i++) {
llvm::StringRef name;
Status error;
success = names_array->GetItemAtIndexAsString(i, name);
target.AddNameToBreakpoint(result_sp, name.str().c_str(), error);
}
}
return result_sp;
}
bool Breakpoint::SerializedBreakpointMatchesNames(
StructuredData::ObjectSP &bkpt_object_sp, std::vector<std::string> &names) {
if (!bkpt_object_sp)
return false;
StructuredData::Dictionary *bkpt_dict = bkpt_object_sp->GetAsDictionary();
if (!bkpt_dict)
return false;
if (names.empty())
return true;
StructuredData::Array *names_array;
bool success =
bkpt_dict->GetValueForKeyAsArray(GetKey(OptionNames::Names), names_array);
// If there are no names, it can't match these names;
if (!success)
return false;
size_t num_names = names_array->GetSize();
for (size_t i = 0; i < num_names; i++) {
llvm::StringRef name;
if (names_array->GetItemAtIndexAsString(i, name)) {
if (llvm::is_contained(names, name))
return true;
}
}
return false;
}
const lldb::TargetSP Breakpoint::GetTargetSP() {
return m_target.shared_from_this();
}
bool Breakpoint::IsInternal() const { return LLDB_BREAK_ID_IS_INTERNAL(m_bid); }
BreakpointLocationSP Breakpoint::AddLocation(const Address &addr,
bool *new_location) {
return m_locations.AddLocation(addr, m_resolve_indirect_symbols,
new_location);
}
BreakpointLocationSP Breakpoint::FindLocationByAddress(const Address &addr) {
return m_locations.FindByAddress(addr);
}
break_id_t Breakpoint::FindLocationIDByAddress(const Address &addr) {
return m_locations.FindIDByAddress(addr);
}
BreakpointLocationSP Breakpoint::FindLocationByID(break_id_t bp_loc_id) {
return m_locations.FindByID(bp_loc_id);
}
BreakpointLocationSP Breakpoint::GetLocationAtIndex(size_t index) {
return m_locations.GetByIndex(index);
}
void Breakpoint::RemoveInvalidLocations(const ArchSpec &arch) {
m_locations.RemoveInvalidLocations(arch);
}
// For each of the overall options we need to decide how they propagate to the
// location options. This will determine the precedence of options on the
// breakpoint vs. its locations.
// Disable at the breakpoint level should override the location settings. That
// way you can conveniently turn off a whole breakpoint without messing up the
// individual settings.
void Breakpoint::SetEnabled(bool enable) {
if (enable == m_options_up->IsEnabled())
return;
m_options_up->SetEnabled(enable);
if (enable)
m_locations.ResolveAllBreakpointSites();
else
m_locations.ClearAllBreakpointSites();
SendBreakpointChangedEvent(enable ? eBreakpointEventTypeEnabled
: eBreakpointEventTypeDisabled);
}
bool Breakpoint::IsEnabled() { return m_options_up->IsEnabled(); }
void Breakpoint::SetIgnoreCount(uint32_t n) {
if (m_options_up->GetIgnoreCount() == n)
return;
m_options_up->SetIgnoreCount(n);
SendBreakpointChangedEvent(eBreakpointEventTypeIgnoreChanged);
}
void Breakpoint::DecrementIgnoreCount() {
uint32_t ignore = m_options_up->GetIgnoreCount();
if (ignore != 0)
m_options_up->SetIgnoreCount(ignore - 1);
}
uint32_t Breakpoint::GetIgnoreCount() const {
return m_options_up->GetIgnoreCount();
}
bool Breakpoint::IgnoreCountShouldStop() {
uint32_t ignore = GetIgnoreCount();
if (ignore != 0) {
// When we get here we know the location that caused the stop doesn't have
// an ignore count, since by contract we call it first... So we don't have
// to find & decrement it, we only have to decrement our own ignore count.
DecrementIgnoreCount();
return false;
} else
return true;
}
uint32_t Breakpoint::GetHitCount() const { return m_hit_counter.GetValue(); }
bool Breakpoint::IsOneShot() const { return m_options_up->IsOneShot(); }
void Breakpoint::SetOneShot(bool one_shot) {
m_options_up->SetOneShot(one_shot);
}
bool Breakpoint::IsAutoContinue() const {
return m_options_up->IsAutoContinue();
}
void Breakpoint::SetAutoContinue(bool auto_continue) {
m_options_up->SetAutoContinue(auto_continue);
}
void Breakpoint::SetThreadID(lldb::tid_t thread_id) {
if (m_options_up->GetThreadSpec()->GetTID() == thread_id)
return;
m_options_up->GetThreadSpec()->SetTID(thread_id);
SendBreakpointChangedEvent(eBreakpointEventTypeThreadChanged);
}
lldb::tid_t Breakpoint::GetThreadID() const {
if (m_options_up->GetThreadSpecNoCreate() == nullptr)
return LLDB_INVALID_THREAD_ID;
else
return m_options_up->GetThreadSpecNoCreate()->GetTID();
}
void Breakpoint::SetThreadIndex(uint32_t index) {
if (m_options_up->GetThreadSpec()->GetIndex() == index)
return;
m_options_up->GetThreadSpec()->SetIndex(index);
SendBreakpointChangedEvent(eBreakpointEventTypeThreadChanged);
}
uint32_t Breakpoint::GetThreadIndex() const {
if (m_options_up->GetThreadSpecNoCreate() == nullptr)
return 0;
else
return m_options_up->GetThreadSpecNoCreate()->GetIndex();
}
void Breakpoint::SetThreadName(const char *thread_name) {
if (m_options_up->GetThreadSpec()->GetName() != nullptr &&
::strcmp(m_options_up->GetThreadSpec()->GetName(), thread_name) == 0)
return;
m_options_up->GetThreadSpec()->SetName(thread_name);
SendBreakpointChangedEvent(eBreakpointEventTypeThreadChanged);
}
const char *Breakpoint::GetThreadName() const {
if (m_options_up->GetThreadSpecNoCreate() == nullptr)
return nullptr;
else
return m_options_up->GetThreadSpecNoCreate()->GetName();
}
void Breakpoint::SetQueueName(const char *queue_name) {
if (m_options_up->GetThreadSpec()->GetQueueName() != nullptr &&
::strcmp(m_options_up->GetThreadSpec()->GetQueueName(), queue_name) == 0)
return;
m_options_up->GetThreadSpec()->SetQueueName(queue_name);
SendBreakpointChangedEvent(eBreakpointEventTypeThreadChanged);
}
const char *Breakpoint::GetQueueName() const {
if (m_options_up->GetThreadSpecNoCreate() == nullptr)
return nullptr;
else
return m_options_up->GetThreadSpecNoCreate()->GetQueueName();
}
void Breakpoint::SetCondition(const char *condition) {
m_options_up->SetCondition(condition);
SendBreakpointChangedEvent(eBreakpointEventTypeConditionChanged);
}
const char *Breakpoint::GetConditionText() const {
return m_options_up->GetConditionText();
}
// This function is used when "baton" doesn't need to be freed
void Breakpoint::SetCallback(BreakpointHitCallback callback, void *baton,
bool is_synchronous) {
// The default "Baton" class will keep a copy of "baton" and won't free or
// delete it when it goes goes out of scope.
m_options_up->SetCallback(callback, std::make_shared<UntypedBaton>(baton),
is_synchronous);
SendBreakpointChangedEvent(eBreakpointEventTypeCommandChanged);
}
// This function is used when a baton needs to be freed and therefore is
// contained in a "Baton" subclass.
void Breakpoint::SetCallback(BreakpointHitCallback callback,
const BatonSP &callback_baton_sp,
bool is_synchronous) {
m_options_up->SetCallback(callback, callback_baton_sp, is_synchronous);
}
void Breakpoint::ClearCallback() { m_options_up->ClearCallback(); }
bool Breakpoint::InvokeCallback(StoppointCallbackContext *context,
break_id_t bp_loc_id) {
return m_options_up->InvokeCallback(context, GetID(), bp_loc_id);
}
BreakpointOptions *Breakpoint::GetOptions() { return m_options_up.get(); }
const BreakpointOptions *Breakpoint::GetOptions() const {
return m_options_up.get();
}
void Breakpoint::ResolveBreakpoint() {
if (m_resolver_sp)
m_resolver_sp->ResolveBreakpoint(*m_filter_sp);
}
void Breakpoint::ResolveBreakpointInModules(
ModuleList &module_list, BreakpointLocationCollection &new_locations) {
m_locations.StartRecordingNewLocations(new_locations);
m_resolver_sp->ResolveBreakpointInModules(*m_filter_sp, module_list);
m_locations.StopRecordingNewLocations();
}
void Breakpoint::ResolveBreakpointInModules(ModuleList &module_list,
bool send_event) {
if (m_resolver_sp) {
// If this is not an internal breakpoint, set up to record the new
// locations, then dispatch an event with the new locations.
if (!IsInternal() && send_event) {
BreakpointEventData *new_locations_event = new BreakpointEventData(
eBreakpointEventTypeLocationsAdded, shared_from_this());
ResolveBreakpointInModules(
module_list, new_locations_event->GetBreakpointLocationCollection());
if (new_locations_event->GetBreakpointLocationCollection().GetSize() !=
0) {
SendBreakpointChangedEvent(new_locations_event);
} else
delete new_locations_event;
} else {
m_resolver_sp->ResolveBreakpointInModules(*m_filter_sp, module_list);
}
}
}
void Breakpoint::ClearAllBreakpointSites() {
m_locations.ClearAllBreakpointSites();
}
// ModulesChanged: Pass in a list of new modules, and
void Breakpoint::ModulesChanged(ModuleList &module_list, bool load,
bool delete_locations) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
LLDB_LOGF(log,
"Breakpoint::ModulesChanged: num_modules: %zu load: %i "
"delete_locations: %i\n",
module_list.GetSize(), load, delete_locations);
if (load) {
// The logic for handling new modules is:
// 1) If the filter rejects this module, then skip it. 2) Run through the
// current location list and if there are any locations
// for that module, we mark the module as "seen" and we don't try to
// re-resolve
// breakpoint locations for that module.
// However, we do add breakpoint sites to these locations if needed.
// 3) If we don't see this module in our breakpoint location list, call
// ResolveInModules.
ModuleList new_modules; // We'll stuff the "unseen" modules in this list,
// and then resolve
// them after the locations pass. Have to do it this way because resolving
// breakpoints will add new locations potentially.
for (ModuleSP module_sp : module_list.Modules()) {
bool seen = false;
if (!m_filter_sp->ModulePasses(module_sp))
continue;
BreakpointLocationCollection locations_with_no_section;
for (BreakpointLocationSP break_loc_sp :
m_locations.BreakpointLocations()) {
// If the section for this location was deleted, that means it's Module
// has gone away but somebody forgot to tell us. Let's clean it up
// here.
Address section_addr(break_loc_sp->GetAddress());
if (section_addr.SectionWasDeleted()) {
locations_with_no_section.Add(break_loc_sp);
continue;
}
if (!break_loc_sp->IsEnabled())
continue;
SectionSP section_sp(section_addr.GetSection());
// If we don't have a Section, that means this location is a raw
// address that we haven't resolved to a section yet. So we'll have to
// look in all the new modules to resolve this location. Otherwise, if
// it was set in this module, re-resolve it here.
if (section_sp && section_sp->GetModule() == module_sp) {
if (!seen)
seen = true;
if (!break_loc_sp->ResolveBreakpointSite()) {
LLDB_LOGF(log,
"Warning: could not set breakpoint site for "
"breakpoint location %d of breakpoint %d.\n",
break_loc_sp->GetID(), GetID());
}
}
}
size_t num_to_delete = locations_with_no_section.GetSize();
for (size_t i = 0; i < num_to_delete; i++)
m_locations.RemoveLocation(locations_with_no_section.GetByIndex(i));
if (!seen)
new_modules.AppendIfNeeded(module_sp);
}
if (new_modules.GetSize() > 0) {
ResolveBreakpointInModules(new_modules);
}
} else {
// Go through the currently set locations and if any have breakpoints in
// the module list, then remove their breakpoint sites, and their locations
// if asked to.
BreakpointEventData *removed_locations_event;
if (!IsInternal())
removed_locations_event = new BreakpointEventData(
eBreakpointEventTypeLocationsRemoved, shared_from_this());
else
removed_locations_event = nullptr;
for (ModuleSP module_sp : module_list.Modules()) {
if (m_filter_sp->ModulePasses(module_sp)) {
size_t loc_idx = 0;
size_t num_locations = m_locations.GetSize();
BreakpointLocationCollection locations_to_remove;
for (loc_idx = 0; loc_idx < num_locations; loc_idx++) {
BreakpointLocationSP break_loc_sp(m_locations.GetByIndex(loc_idx));
SectionSP section_sp(break_loc_sp->GetAddress().GetSection());
if (section_sp && section_sp->GetModule() == module_sp) {
// Remove this breakpoint since the shared library is unloaded, but
// keep the breakpoint location around so we always get complete
// hit count and breakpoint lifetime info
break_loc_sp->ClearBreakpointSite();
if (removed_locations_event) {
removed_locations_event->GetBreakpointLocationCollection().Add(
break_loc_sp);
}
if (delete_locations)
locations_to_remove.Add(break_loc_sp);
}
}
if (delete_locations) {
size_t num_locations_to_remove = locations_to_remove.GetSize();
for (loc_idx = 0; loc_idx < num_locations_to_remove; loc_idx++)
m_locations.RemoveLocation(locations_to_remove.GetByIndex(loc_idx));
}
}
}
SendBreakpointChangedEvent(removed_locations_event);
}
}
namespace {
static bool SymbolContextsMightBeEquivalent(SymbolContext &old_sc,
SymbolContext &new_sc) {
bool equivalent_scs = false;
if (old_sc.module_sp.get() == new_sc.module_sp.get()) {
// If these come from the same module, we can directly compare the
// pointers:
if (old_sc.comp_unit && new_sc.comp_unit &&
(old_sc.comp_unit == new_sc.comp_unit)) {
if (old_sc.function && new_sc.function &&
(old_sc.function == new_sc.function)) {
equivalent_scs = true;
}
} else if (old_sc.symbol && new_sc.symbol &&
(old_sc.symbol == new_sc.symbol)) {
equivalent_scs = true;
}
} else {
// Otherwise we will compare by name...
if (old_sc.comp_unit && new_sc.comp_unit) {
if (old_sc.comp_unit->GetPrimaryFile() ==
new_sc.comp_unit->GetPrimaryFile()) {
// Now check the functions:
if (old_sc.function && new_sc.function &&
(old_sc.function->GetName() == new_sc.function->GetName())) {
equivalent_scs = true;
}
}
} else if (old_sc.symbol && new_sc.symbol) {
if (Mangled::Compare(old_sc.symbol->GetMangled(),
new_sc.symbol->GetMangled()) == 0) {
equivalent_scs = true;
}
}
}
return equivalent_scs;
}
} // anonymous namespace
void Breakpoint::ModuleReplaced(ModuleSP old_module_sp,
ModuleSP new_module_sp) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
LLDB_LOGF(log, "Breakpoint::ModulesReplaced for %s\n",
old_module_sp->GetSpecificationDescription().c_str());
// First find all the locations that are in the old module
BreakpointLocationCollection old_break_locs;
for (BreakpointLocationSP break_loc_sp : m_locations.BreakpointLocations()) {
SectionSP section_sp = break_loc_sp->GetAddress().GetSection();
if (section_sp && section_sp->GetModule() == old_module_sp) {
old_break_locs.Add(break_loc_sp);
}
}
size_t num_old_locations = old_break_locs.GetSize();
if (num_old_locations == 0) {
// There were no locations in the old module, so we just need to check if
// there were any in the new module.
ModuleList temp_list;
temp_list.Append(new_module_sp);
ResolveBreakpointInModules(temp_list);
} else {
// First search the new module for locations. Then compare this with the
// old list, copy over locations that "look the same" Then delete the old
// locations. Finally remember to post the creation event.
//
// Two locations are the same if they have the same comp unit & function
// (by name) and there are the same number of locations in the old function
// as in the new one.
ModuleList temp_list;
temp_list.Append(new_module_sp);
BreakpointLocationCollection new_break_locs;
ResolveBreakpointInModules(temp_list, new_break_locs);
BreakpointLocationCollection locations_to_remove;
BreakpointLocationCollection locations_to_announce;
size_t num_new_locations = new_break_locs.GetSize();
if (num_new_locations > 0) {
// Break out the case of one location -> one location since that's the
// most common one, and there's no need to build up the structures needed
// for the merge in that case.
if (num_new_locations == 1 && num_old_locations == 1) {
bool equivalent_locations = false;
SymbolContext old_sc, new_sc;
// The only way the old and new location can be equivalent is if they
// have the same amount of information:
BreakpointLocationSP old_loc_sp = old_break_locs.GetByIndex(0);
BreakpointLocationSP new_loc_sp = new_break_locs.GetByIndex(0);
if (old_loc_sp->GetAddress().CalculateSymbolContext(&old_sc) ==
new_loc_sp->GetAddress().CalculateSymbolContext(&new_sc)) {
equivalent_locations =
SymbolContextsMightBeEquivalent(old_sc, new_sc);
}
if (equivalent_locations) {
m_locations.SwapLocation(old_loc_sp, new_loc_sp);
} else {
locations_to_remove.Add(old_loc_sp);
locations_to_announce.Add(new_loc_sp);
}
} else {
// We don't want to have to keep computing the SymbolContexts for these
// addresses over and over, so lets get them up front:
typedef std::map<lldb::break_id_t, SymbolContext> IDToSCMap;
IDToSCMap old_sc_map;
for (size_t idx = 0; idx < num_old_locations; idx++) {
SymbolContext sc;
BreakpointLocationSP bp_loc_sp = old_break_locs.GetByIndex(idx);
lldb::break_id_t loc_id = bp_loc_sp->GetID();
bp_loc_sp->GetAddress().CalculateSymbolContext(&old_sc_map[loc_id]);
}
std::map<lldb::break_id_t, SymbolContext> new_sc_map;
for (size_t idx = 0; idx < num_new_locations; idx++) {
SymbolContext sc;
BreakpointLocationSP bp_loc_sp = new_break_locs.GetByIndex(idx);
lldb::break_id_t loc_id = bp_loc_sp->GetID();
bp_loc_sp->GetAddress().CalculateSymbolContext(&new_sc_map[loc_id]);
}
// Take an element from the old Symbol Contexts
while (old_sc_map.size() > 0) {
lldb::break_id_t old_id = old_sc_map.begin()->first;
SymbolContext &old_sc = old_sc_map.begin()->second;
// Count the number of entries equivalent to this SC for the old
// list:
std::vector<lldb::break_id_t> old_id_vec;
old_id_vec.push_back(old_id);
IDToSCMap::iterator tmp_iter;
for (tmp_iter = ++old_sc_map.begin(); tmp_iter != old_sc_map.end();
tmp_iter++) {
if (SymbolContextsMightBeEquivalent(old_sc, tmp_iter->second))
old_id_vec.push_back(tmp_iter->first);
}
// Now find all the equivalent locations in the new list.
std::vector<lldb::break_id_t> new_id_vec;
for (tmp_iter = new_sc_map.begin(); tmp_iter != new_sc_map.end();
tmp_iter++) {
if (SymbolContextsMightBeEquivalent(old_sc, tmp_iter->second))
new_id_vec.push_back(tmp_iter->first);
}
// Alright, if we have the same number of potentially equivalent
// locations in the old and new modules, we'll just map them one to
// one in ascending ID order (assuming the resolver's order would
// match the equivalent ones. Otherwise, we'll dump all the old ones,
// and just take the new ones, erasing the elements from both maps as
// we go.
if (old_id_vec.size() == new_id_vec.size()) {
llvm::sort(old_id_vec);
llvm::sort(new_id_vec);
size_t num_elements = old_id_vec.size();
for (size_t idx = 0; idx < num_elements; idx++) {
BreakpointLocationSP old_loc_sp =
old_break_locs.FindByIDPair(GetID(), old_id_vec[idx]);
BreakpointLocationSP new_loc_sp =
new_break_locs.FindByIDPair(GetID(), new_id_vec[idx]);
m_locations.SwapLocation(old_loc_sp, new_loc_sp);
old_sc_map.erase(old_id_vec[idx]);
new_sc_map.erase(new_id_vec[idx]);
}
} else {
for (lldb::break_id_t old_id : old_id_vec) {
locations_to_remove.Add(
old_break_locs.FindByIDPair(GetID(), old_id));
old_sc_map.erase(old_id);
}
for (lldb::break_id_t new_id : new_id_vec) {
locations_to_announce.Add(
new_break_locs.FindByIDPair(GetID(), new_id));
new_sc_map.erase(new_id);
}
}
}
}
}
// Now remove the remaining old locations, and cons up a removed locations
// event. Note, we don't put the new locations that were swapped with an
// old location on the locations_to_remove list, so we don't need to worry
// about telling the world about removing a location we didn't tell them
// about adding.
BreakpointEventData *locations_event;
if (!IsInternal())
locations_event = new BreakpointEventData(
eBreakpointEventTypeLocationsRemoved, shared_from_this());
else
locations_event = nullptr;
for (BreakpointLocationSP loc_sp :
locations_to_remove.BreakpointLocations()) {
m_locations.RemoveLocation(loc_sp);
if (locations_event)
locations_event->GetBreakpointLocationCollection().Add(loc_sp);
}
SendBreakpointChangedEvent(locations_event);
// And announce the new ones.
if (!IsInternal()) {
locations_event = new BreakpointEventData(
eBreakpointEventTypeLocationsAdded, shared_from_this());
for (BreakpointLocationSP loc_sp :
locations_to_announce.BreakpointLocations())
locations_event->GetBreakpointLocationCollection().Add(loc_sp);
SendBreakpointChangedEvent(locations_event);
}
m_locations.Compact();
}
}
void Breakpoint::Dump(Stream *) {}
size_t Breakpoint::GetNumResolvedLocations() const {
// Return the number of breakpoints that are actually resolved and set down
// in the inferior process.
return m_locations.GetNumResolvedLocations();
}
bool Breakpoint::HasResolvedLocations() const {
return GetNumResolvedLocations() > 0;
}
size_t Breakpoint::GetNumLocations() const { return m_locations.GetSize(); }
bool Breakpoint::AddName(llvm::StringRef new_name) {
m_name_list.insert(new_name.str().c_str());
return true;
}
void Breakpoint::GetDescription(Stream *s, lldb::DescriptionLevel level,
bool show_locations) {
assert(s != nullptr);
if (!m_kind_description.empty()) {
if (level == eDescriptionLevelBrief) {
s->PutCString(GetBreakpointKind());
return;
} else
s->Printf("Kind: %s\n", GetBreakpointKind());
}
const size_t num_locations = GetNumLocations();
const size_t num_resolved_locations = GetNumResolvedLocations();
// They just made the breakpoint, they don't need to be told HOW they made
// it... Also, we'll print the breakpoint number differently depending on
// whether there is 1 or more locations.
if (level != eDescriptionLevelInitial) {
s->Printf("%i: ", GetID());
GetResolverDescription(s);
GetFilterDescription(s);
}
switch (level) {
case lldb::eDescriptionLevelBrief:
case lldb::eDescriptionLevelFull:
if (num_locations > 0) {
s->Printf(", locations = %" PRIu64, (uint64_t)num_locations);
if (num_resolved_locations > 0)
s->Printf(", resolved = %" PRIu64 ", hit count = %d",
(uint64_t)num_resolved_locations, GetHitCount());
} else {
// Don't print the pending notification for exception resolvers since we
// don't generally know how to set them until the target is run.
if (m_resolver_sp->getResolverID() !=
BreakpointResolver::ExceptionResolver)
s->Printf(", locations = 0 (pending)");
}
GetOptions()->GetDescription(s, level);
if (m_precondition_sp)
m_precondition_sp->GetDescription(*s, level);
if (level == lldb::eDescriptionLevelFull) {
if (!m_name_list.empty()) {
s->EOL();
s->Indent();
s->Printf("Names:");
s->EOL();
s->IndentMore();
for (std::string name : m_name_list) {
s->Indent();
s->Printf("%s\n", name.c_str());
}
s->IndentLess();
}
s->IndentLess();
s->EOL();
}
break;
case lldb::eDescriptionLevelInitial:
s->Printf("Breakpoint %i: ", GetID());
if (num_locations == 0) {
s->Printf("no locations (pending).");
} else if (num_locations == 1 && !show_locations) {
// There is only one location, so we'll just print that location
// information.
GetLocationAtIndex(0)->GetDescription(s, level);
} else {
s->Printf("%" PRIu64 " locations.", static_cast<uint64_t>(num_locations));
}
s->EOL();
break;
case lldb::eDescriptionLevelVerbose:
// Verbose mode does a debug dump of the breakpoint
Dump(s);
s->EOL();
// s->Indent();
GetOptions()->GetDescription(s, level);
break;
default:
break;
}
// The brief description is just the location name (1.2 or whatever). That's
// pointless to show in the breakpoint's description, so suppress it.
if (show_locations && level != lldb::eDescriptionLevelBrief) {
s->IndentMore();
for (size_t i = 0; i < num_locations; ++i) {
BreakpointLocation *loc = GetLocationAtIndex(i).get();
loc->GetDescription(s, level);
s->EOL();
}
s->IndentLess();
}
}
void Breakpoint::GetResolverDescription(Stream *s) {
if (m_resolver_sp)
m_resolver_sp->GetDescription(s);
}
bool Breakpoint::GetMatchingFileLine(ConstString filename,
uint32_t line_number,
BreakpointLocationCollection &loc_coll) {
// TODO: To be correct, this method needs to fill the breakpoint location
// collection
// with the location IDs which match the filename and line_number.
//
if (m_resolver_sp) {
BreakpointResolverFileLine *resolverFileLine =
dyn_cast<BreakpointResolverFileLine>(m_resolver_sp.get());
if (resolverFileLine &&
resolverFileLine->m_file_spec.GetFilename() == filename &&
resolverFileLine->m_line_number == line_number) {
return true;
}
}
return false;
}
void Breakpoint::GetFilterDescription(Stream *s) {
m_filter_sp->GetDescription(s);
}
bool Breakpoint::EvaluatePrecondition(StoppointCallbackContext &context) {
if (!m_precondition_sp)
return true;
return m_precondition_sp->EvaluatePrecondition(context);
}
void Breakpoint::SendBreakpointChangedEvent(
lldb::BreakpointEventType eventKind) {
if (!m_being_created && !IsInternal() &&
GetTarget().EventTypeHasListeners(
Target::eBroadcastBitBreakpointChanged)) {
BreakpointEventData *data =
new Breakpoint::BreakpointEventData(eventKind, shared_from_this());
GetTarget().BroadcastEvent(Target::eBroadcastBitBreakpointChanged, data);
}
}
void Breakpoint::SendBreakpointChangedEvent(BreakpointEventData *data) {
if (data == nullptr)
return;
if (!m_being_created && !IsInternal() &&
GetTarget().EventTypeHasListeners(Target::eBroadcastBitBreakpointChanged))
GetTarget().BroadcastEvent(Target::eBroadcastBitBreakpointChanged, data);
else
delete data;
}
Breakpoint::BreakpointEventData::BreakpointEventData(
BreakpointEventType sub_type, const BreakpointSP &new_breakpoint_sp)
: EventData(), m_breakpoint_event(sub_type),
m_new_breakpoint_sp(new_breakpoint_sp) {}
Breakpoint::BreakpointEventData::~BreakpointEventData() = default;
ConstString Breakpoint::BreakpointEventData::GetFlavorString() {
static ConstString g_flavor("Breakpoint::BreakpointEventData");
return g_flavor;
}
ConstString Breakpoint::BreakpointEventData::GetFlavor() const {
return BreakpointEventData::GetFlavorString();
}
BreakpointSP &Breakpoint::BreakpointEventData::GetBreakpoint() {
return m_new_breakpoint_sp;
}
BreakpointEventType
Breakpoint::BreakpointEventData::GetBreakpointEventType() const {
return m_breakpoint_event;
}
void Breakpoint::BreakpointEventData::Dump(Stream *s) const {}
const Breakpoint::BreakpointEventData *
Breakpoint::BreakpointEventData::GetEventDataFromEvent(const Event *event) {
if (event) {
const EventData *event_data = event->GetData();
if (event_data &&
event_data->GetFlavor() == BreakpointEventData::GetFlavorString())
return static_cast<const BreakpointEventData *>(event->GetData());
}
return nullptr;
}
BreakpointEventType
Breakpoint::BreakpointEventData::GetBreakpointEventTypeFromEvent(
const EventSP &event_sp) {
const BreakpointEventData *data = GetEventDataFromEvent(event_sp.get());
if (data == nullptr)
return eBreakpointEventTypeInvalidType;
else
return data->GetBreakpointEventType();
}
BreakpointSP Breakpoint::BreakpointEventData::GetBreakpointFromEvent(
const EventSP &event_sp) {
BreakpointSP bp_sp;
const BreakpointEventData *data = GetEventDataFromEvent(event_sp.get());
if (data)
bp_sp = data->m_new_breakpoint_sp;
return bp_sp;
}
size_t Breakpoint::BreakpointEventData::GetNumBreakpointLocationsFromEvent(
const EventSP &event_sp) {
const BreakpointEventData *data = GetEventDataFromEvent(event_sp.get());
if (data)
return data->m_locations.GetSize();
return 0;
}
lldb::BreakpointLocationSP
Breakpoint::BreakpointEventData::GetBreakpointLocationAtIndexFromEvent(
const lldb::EventSP &event_sp, uint32_t bp_loc_idx) {
lldb::BreakpointLocationSP bp_loc_sp;
const BreakpointEventData *data = GetEventDataFromEvent(event_sp.get());
if (data) {
bp_loc_sp = data->m_locations.GetByIndex(bp_loc_idx);
}
return bp_loc_sp;
}
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