forked from OSchip/llvm-project
637 lines
20 KiB
C++
637 lines
20 KiB
C++
//===-- BreakpointLocation.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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// C Includes
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// C++ Includes
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// Other libraries and framework includes
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// Project includes
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#include "lldb/Breakpoint/BreakpointLocation.h"
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#include "lldb/Breakpoint/BreakpointID.h"
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#include "lldb/Breakpoint/StoppointCallbackContext.h"
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#include "lldb/Core/Debugger.h"
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#include "lldb/Core/Log.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/StreamString.h"
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#include "lldb/Core/ValueObject.h"
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#include "lldb/Expression/DiagnosticManager.h"
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#include "lldb/Expression/ExpressionVariable.h"
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#include "lldb/Expression/UserExpression.h"
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#include "lldb/Symbol/CompileUnit.h"
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#include "lldb/Symbol/Symbol.h"
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#include "lldb/Symbol/TypeSystem.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Target/Thread.h"
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#include "lldb/Target/ThreadSpec.h"
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using namespace lldb;
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using namespace lldb_private;
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BreakpointLocation::BreakpointLocation(break_id_t loc_id, Breakpoint &owner,
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const Address &addr, lldb::tid_t tid,
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bool hardware, bool check_for_resolver)
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: StoppointLocation(loc_id, addr.GetOpcodeLoadAddress(&owner.GetTarget()),
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hardware),
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m_being_created(true), m_should_resolve_indirect_functions(false),
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m_is_reexported(false), m_is_indirect(false), m_address(addr),
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m_owner(owner), m_options_ap(), m_bp_site_sp(), m_condition_mutex() {
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if (check_for_resolver) {
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Symbol *symbol = m_address.CalculateSymbolContextSymbol();
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if (symbol && symbol->IsIndirect()) {
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SetShouldResolveIndirectFunctions(true);
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}
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}
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SetThreadID(tid);
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m_being_created = false;
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}
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BreakpointLocation::~BreakpointLocation() { ClearBreakpointSite(); }
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lldb::addr_t BreakpointLocation::GetLoadAddress() const {
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return m_address.GetOpcodeLoadAddress(&m_owner.GetTarget());
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}
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Address &BreakpointLocation::GetAddress() { return m_address; }
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Breakpoint &BreakpointLocation::GetBreakpoint() { return m_owner; }
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Target &BreakpointLocation::GetTarget() { return m_owner.GetTarget(); }
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bool BreakpointLocation::IsEnabled() const {
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if (!m_owner.IsEnabled())
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return false;
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else if (m_options_ap.get() != nullptr)
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return m_options_ap->IsEnabled();
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else
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return true;
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}
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void BreakpointLocation::SetEnabled(bool enabled) {
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GetLocationOptions()->SetEnabled(enabled);
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if (enabled) {
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ResolveBreakpointSite();
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} else {
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ClearBreakpointSite();
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}
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SendBreakpointLocationChangedEvent(enabled ? eBreakpointEventTypeEnabled
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: eBreakpointEventTypeDisabled);
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}
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void BreakpointLocation::SetThreadID(lldb::tid_t thread_id) {
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if (thread_id != LLDB_INVALID_THREAD_ID)
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GetLocationOptions()->SetThreadID(thread_id);
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else {
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// If we're resetting this to an invalid thread id, then
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// don't make an options pointer just to do that.
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if (m_options_ap.get() != nullptr)
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m_options_ap->SetThreadID(thread_id);
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}
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SendBreakpointLocationChangedEvent(eBreakpointEventTypeThreadChanged);
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}
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lldb::tid_t BreakpointLocation::GetThreadID() {
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if (GetOptionsNoCreate()->GetThreadSpecNoCreate())
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return GetOptionsNoCreate()->GetThreadSpecNoCreate()->GetTID();
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else
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return LLDB_INVALID_THREAD_ID;
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}
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void BreakpointLocation::SetThreadIndex(uint32_t index) {
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if (index != 0)
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GetLocationOptions()->GetThreadSpec()->SetIndex(index);
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else {
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// If we're resetting this to an invalid thread id, then
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// don't make an options pointer just to do that.
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if (m_options_ap.get() != nullptr)
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m_options_ap->GetThreadSpec()->SetIndex(index);
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}
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SendBreakpointLocationChangedEvent(eBreakpointEventTypeThreadChanged);
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}
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uint32_t BreakpointLocation::GetThreadIndex() const {
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if (GetOptionsNoCreate()->GetThreadSpecNoCreate())
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return GetOptionsNoCreate()->GetThreadSpecNoCreate()->GetIndex();
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else
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return 0;
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}
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void BreakpointLocation::SetThreadName(const char *thread_name) {
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if (thread_name != nullptr)
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GetLocationOptions()->GetThreadSpec()->SetName(thread_name);
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else {
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// If we're resetting this to an invalid thread id, then
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// don't make an options pointer just to do that.
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if (m_options_ap.get() != nullptr)
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m_options_ap->GetThreadSpec()->SetName(thread_name);
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}
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SendBreakpointLocationChangedEvent(eBreakpointEventTypeThreadChanged);
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}
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const char *BreakpointLocation::GetThreadName() const {
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if (GetOptionsNoCreate()->GetThreadSpecNoCreate())
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return GetOptionsNoCreate()->GetThreadSpecNoCreate()->GetName();
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else
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return nullptr;
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}
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void BreakpointLocation::SetQueueName(const char *queue_name) {
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if (queue_name != nullptr)
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GetLocationOptions()->GetThreadSpec()->SetQueueName(queue_name);
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else {
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// If we're resetting this to an invalid thread id, then
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// don't make an options pointer just to do that.
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if (m_options_ap.get() != nullptr)
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m_options_ap->GetThreadSpec()->SetQueueName(queue_name);
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}
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SendBreakpointLocationChangedEvent(eBreakpointEventTypeThreadChanged);
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}
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const char *BreakpointLocation::GetQueueName() const {
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if (GetOptionsNoCreate()->GetThreadSpecNoCreate())
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return GetOptionsNoCreate()->GetThreadSpecNoCreate()->GetQueueName();
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else
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return nullptr;
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}
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bool BreakpointLocation::InvokeCallback(StoppointCallbackContext *context) {
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if (m_options_ap.get() != nullptr && m_options_ap->HasCallback())
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return m_options_ap->InvokeCallback(context, m_owner.GetID(), GetID());
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else
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return m_owner.InvokeCallback(context, GetID());
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}
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void BreakpointLocation::SetCallback(BreakpointHitCallback callback,
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void *baton, bool is_synchronous) {
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// The default "Baton" class will keep a copy of "baton" and won't free
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// or delete it when it goes goes out of scope.
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GetLocationOptions()->SetCallback(
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callback, std::make_shared<UntypedBaton>(baton), is_synchronous);
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SendBreakpointLocationChangedEvent(eBreakpointEventTypeCommandChanged);
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}
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void BreakpointLocation::SetCallback(BreakpointHitCallback callback,
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const BatonSP &baton_sp,
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bool is_synchronous) {
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GetLocationOptions()->SetCallback(callback, baton_sp, is_synchronous);
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SendBreakpointLocationChangedEvent(eBreakpointEventTypeCommandChanged);
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}
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void BreakpointLocation::ClearCallback() {
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GetLocationOptions()->ClearCallback();
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}
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void BreakpointLocation::SetCondition(const char *condition) {
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GetLocationOptions()->SetCondition(condition);
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SendBreakpointLocationChangedEvent(eBreakpointEventTypeConditionChanged);
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}
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const char *BreakpointLocation::GetConditionText(size_t *hash) const {
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return GetOptionsNoCreate()->GetConditionText(hash);
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}
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bool BreakpointLocation::ConditionSaysStop(ExecutionContext &exe_ctx,
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Error &error) {
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Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS);
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std::lock_guard<std::mutex> guard(m_condition_mutex);
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size_t condition_hash;
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const char *condition_text = GetConditionText(&condition_hash);
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if (!condition_text) {
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m_user_expression_sp.reset();
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return false;
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}
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error.Clear();
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DiagnosticManager diagnostics;
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if (condition_hash != m_condition_hash || !m_user_expression_sp ||
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!m_user_expression_sp->MatchesContext(exe_ctx)) {
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LanguageType language = eLanguageTypeUnknown;
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// See if we can figure out the language from the frame, otherwise use the
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// default language:
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CompileUnit *comp_unit = m_address.CalculateSymbolContextCompileUnit();
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if (comp_unit)
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language = comp_unit->GetLanguage();
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m_user_expression_sp.reset(GetTarget().GetUserExpressionForLanguage(
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condition_text, llvm::StringRef(), language, Expression::eResultTypeAny,
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EvaluateExpressionOptions(), error));
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if (error.Fail()) {
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if (log)
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log->Printf("Error getting condition expression: %s.",
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error.AsCString());
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m_user_expression_sp.reset();
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return true;
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}
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if (!m_user_expression_sp->Parse(diagnostics, exe_ctx,
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eExecutionPolicyOnlyWhenNeeded, true,
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false)) {
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error.SetErrorStringWithFormat(
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"Couldn't parse conditional expression:\n%s",
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diagnostics.GetString().c_str());
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m_user_expression_sp.reset();
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return true;
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}
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m_condition_hash = condition_hash;
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}
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// We need to make sure the user sees any parse errors in their condition, so
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// we'll hook the
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// constructor errors up to the debugger's Async I/O.
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ValueObjectSP result_value_sp;
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EvaluateExpressionOptions options;
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options.SetUnwindOnError(true);
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options.SetIgnoreBreakpoints(true);
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options.SetTryAllThreads(true);
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options.SetResultIsInternal(
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true); // Don't generate a user variable for condition expressions.
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Error expr_error;
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diagnostics.Clear();
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ExpressionVariableSP result_variable_sp;
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ExpressionResults result_code = m_user_expression_sp->Execute(
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diagnostics, exe_ctx, options, m_user_expression_sp, result_variable_sp);
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bool ret;
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if (result_code == eExpressionCompleted) {
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if (!result_variable_sp) {
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error.SetErrorString("Expression did not return a result");
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return false;
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}
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result_value_sp = result_variable_sp->GetValueObject();
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if (result_value_sp) {
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ret = result_value_sp->IsLogicalTrue(error);
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if (log) {
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if (error.Success()) {
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log->Printf("Condition successfully evaluated, result is %s.\n",
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ret ? "true" : "false");
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} else {
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error.SetErrorString(
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"Failed to get an integer result from the expression");
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ret = false;
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}
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}
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} else {
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ret = false;
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error.SetErrorString("Failed to get any result from the expression");
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}
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} else {
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ret = false;
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error.SetErrorStringWithFormat("Couldn't execute expression:\n%s",
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diagnostics.GetString().c_str());
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}
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return ret;
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}
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uint32_t BreakpointLocation::GetIgnoreCount() {
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return GetOptionsNoCreate()->GetIgnoreCount();
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}
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void BreakpointLocation::SetIgnoreCount(uint32_t n) {
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GetLocationOptions()->SetIgnoreCount(n);
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SendBreakpointLocationChangedEvent(eBreakpointEventTypeIgnoreChanged);
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}
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void BreakpointLocation::DecrementIgnoreCount() {
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if (m_options_ap.get() != nullptr) {
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uint32_t loc_ignore = m_options_ap->GetIgnoreCount();
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if (loc_ignore != 0)
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m_options_ap->SetIgnoreCount(loc_ignore - 1);
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}
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}
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bool BreakpointLocation::IgnoreCountShouldStop() {
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if (m_options_ap.get() != nullptr) {
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uint32_t loc_ignore = m_options_ap->GetIgnoreCount();
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if (loc_ignore != 0) {
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m_owner.DecrementIgnoreCount();
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DecrementIgnoreCount(); // Have to decrement our owners' ignore count,
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// since it won't get a
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// chance to.
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return false;
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}
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}
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return true;
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}
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const BreakpointOptions *BreakpointLocation::GetOptionsNoCreate() const {
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if (m_options_ap.get() != nullptr)
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return m_options_ap.get();
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else
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return m_owner.GetOptions();
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}
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BreakpointOptions *BreakpointLocation::GetLocationOptions() {
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// If we make the copy we don't copy the callbacks because that is potentially
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// expensive and we don't want to do that for the simple case where someone is
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// just disabling the location.
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if (m_options_ap.get() == nullptr)
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m_options_ap.reset(
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BreakpointOptions::CopyOptionsNoCallback(*m_owner.GetOptions()));
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return m_options_ap.get();
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}
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bool BreakpointLocation::ValidForThisThread(Thread *thread) {
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return thread->MatchesSpec(GetOptionsNoCreate()->GetThreadSpecNoCreate());
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}
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// RETURNS - true if we should stop at this breakpoint, false if we
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// should continue. Note, we don't check the thread spec for the breakpoint
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// here, since if the breakpoint is not for this thread, then the event won't
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// even get reported, so the check is redundant.
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bool BreakpointLocation::ShouldStop(StoppointCallbackContext *context) {
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bool should_stop = true;
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Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS);
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// Do this first, if a location is disabled, it shouldn't increment its hit
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// count.
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if (!IsEnabled())
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return false;
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if (!IgnoreCountShouldStop())
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return false;
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if (!m_owner.IgnoreCountShouldStop())
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return false;
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// We only run synchronous callbacks in ShouldStop:
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context->is_synchronous = true;
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should_stop = InvokeCallback(context);
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if (log) {
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StreamString s;
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GetDescription(&s, lldb::eDescriptionLevelVerbose);
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log->Printf("Hit breakpoint location: %s, %s.\n", s.GetData(),
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should_stop ? "stopping" : "continuing");
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}
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return should_stop;
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}
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void BreakpointLocation::BumpHitCount() {
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if (IsEnabled()) {
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// Step our hit count, and also step the hit count of the owner.
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IncrementHitCount();
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m_owner.IncrementHitCount();
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}
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}
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void BreakpointLocation::UndoBumpHitCount() {
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if (IsEnabled()) {
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// Step our hit count, and also step the hit count of the owner.
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DecrementHitCount();
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m_owner.DecrementHitCount();
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}
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}
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bool BreakpointLocation::IsResolved() const {
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return m_bp_site_sp.get() != nullptr;
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}
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lldb::BreakpointSiteSP BreakpointLocation::GetBreakpointSite() const {
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return m_bp_site_sp;
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}
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bool BreakpointLocation::ResolveBreakpointSite() {
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if (m_bp_site_sp)
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return true;
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Process *process = m_owner.GetTarget().GetProcessSP().get();
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if (process == nullptr)
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return false;
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lldb::break_id_t new_id =
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process->CreateBreakpointSite(shared_from_this(), m_owner.IsHardware());
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if (new_id == LLDB_INVALID_BREAK_ID) {
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Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS);
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if (log)
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log->Warning("Tried to add breakpoint site at 0x%" PRIx64
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" but it was already present.\n",
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m_address.GetOpcodeLoadAddress(&m_owner.GetTarget()));
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return false;
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}
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return true;
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}
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bool BreakpointLocation::SetBreakpointSite(BreakpointSiteSP &bp_site_sp) {
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m_bp_site_sp = bp_site_sp;
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SendBreakpointLocationChangedEvent(eBreakpointEventTypeLocationsResolved);
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return true;
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}
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bool BreakpointLocation::ClearBreakpointSite() {
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if (m_bp_site_sp.get()) {
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ProcessSP process_sp(m_owner.GetTarget().GetProcessSP());
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// If the process exists, get it to remove the owner, it will remove the
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// physical implementation
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// of the breakpoint as well if there are no more owners. Otherwise just
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// remove this owner.
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if (process_sp)
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process_sp->RemoveOwnerFromBreakpointSite(GetBreakpoint().GetID(),
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GetID(), m_bp_site_sp);
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else
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m_bp_site_sp->RemoveOwner(GetBreakpoint().GetID(), GetID());
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m_bp_site_sp.reset();
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return true;
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}
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return false;
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}
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void BreakpointLocation::GetDescription(Stream *s,
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lldb::DescriptionLevel level) {
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SymbolContext sc;
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// If the description level is "initial" then the breakpoint is printing out
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// our initial state,
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// and we should let it decide how it wants to print our label.
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if (level != eDescriptionLevelInitial) {
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s->Indent();
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BreakpointID::GetCanonicalReference(s, m_owner.GetID(), GetID());
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}
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if (level == lldb::eDescriptionLevelBrief)
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return;
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if (level != eDescriptionLevelInitial)
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s->PutCString(": ");
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if (level == lldb::eDescriptionLevelVerbose)
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s->IndentMore();
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if (m_address.IsSectionOffset()) {
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m_address.CalculateSymbolContext(&sc);
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if (level == lldb::eDescriptionLevelFull ||
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level == eDescriptionLevelInitial) {
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if (IsReExported())
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s->PutCString("re-exported target = ");
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else
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s->PutCString("where = ");
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sc.DumpStopContext(s, m_owner.GetTarget().GetProcessSP().get(), m_address,
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false, true, false, true, true);
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} else {
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if (sc.module_sp) {
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s->EOL();
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s->Indent("module = ");
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sc.module_sp->GetFileSpec().Dump(s);
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}
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if (sc.comp_unit != nullptr) {
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s->EOL();
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s->Indent("compile unit = ");
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static_cast<FileSpec *>(sc.comp_unit)->GetFilename().Dump(s);
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if (sc.function != nullptr) {
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s->EOL();
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s->Indent("function = ");
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s->PutCString(sc.function->GetName().AsCString("<unknown>"));
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}
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if (sc.line_entry.line > 0) {
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s->EOL();
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s->Indent("location = ");
|
|
sc.line_entry.DumpStopContext(s, true);
|
|
}
|
|
|
|
} else {
|
|
// If we don't have a comp unit, see if we have a symbol we can print.
|
|
if (sc.symbol) {
|
|
s->EOL();
|
|
if (IsReExported())
|
|
s->Indent("re-exported target = ");
|
|
else
|
|
s->Indent("symbol = ");
|
|
s->PutCString(sc.symbol->GetName().AsCString("<unknown>"));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (level == lldb::eDescriptionLevelVerbose) {
|
|
s->EOL();
|
|
s->Indent();
|
|
}
|
|
|
|
if (m_address.IsSectionOffset() &&
|
|
(level == eDescriptionLevelFull || level == eDescriptionLevelInitial))
|
|
s->Printf(", ");
|
|
s->Printf("address = ");
|
|
|
|
ExecutionContextScope *exe_scope = nullptr;
|
|
Target *target = &m_owner.GetTarget();
|
|
if (target)
|
|
exe_scope = target->GetProcessSP().get();
|
|
if (exe_scope == nullptr)
|
|
exe_scope = target;
|
|
|
|
if (level == eDescriptionLevelInitial)
|
|
m_address.Dump(s, exe_scope, Address::DumpStyleLoadAddress,
|
|
Address::DumpStyleFileAddress);
|
|
else
|
|
m_address.Dump(s, exe_scope, Address::DumpStyleLoadAddress,
|
|
Address::DumpStyleModuleWithFileAddress);
|
|
|
|
if (IsIndirect() && m_bp_site_sp) {
|
|
Address resolved_address;
|
|
resolved_address.SetLoadAddress(m_bp_site_sp->GetLoadAddress(), target);
|
|
Symbol *resolved_symbol = resolved_address.CalculateSymbolContextSymbol();
|
|
if (resolved_symbol) {
|
|
if (level == eDescriptionLevelFull || level == eDescriptionLevelInitial)
|
|
s->Printf(", ");
|
|
else if (level == lldb::eDescriptionLevelVerbose) {
|
|
s->EOL();
|
|
s->Indent();
|
|
}
|
|
s->Printf("indirect target = %s",
|
|
resolved_symbol->GetName().GetCString());
|
|
}
|
|
}
|
|
|
|
if (level == lldb::eDescriptionLevelVerbose) {
|
|
s->EOL();
|
|
s->Indent();
|
|
s->Printf("resolved = %s\n", IsResolved() ? "true" : "false");
|
|
|
|
s->Indent();
|
|
s->Printf("hit count = %-4u\n", GetHitCount());
|
|
|
|
if (m_options_ap.get()) {
|
|
s->Indent();
|
|
m_options_ap->GetDescription(s, level);
|
|
s->EOL();
|
|
}
|
|
s->IndentLess();
|
|
} else if (level != eDescriptionLevelInitial) {
|
|
s->Printf(", %sresolved, hit count = %u ", (IsResolved() ? "" : "un"),
|
|
GetHitCount());
|
|
if (m_options_ap.get()) {
|
|
m_options_ap->GetDescription(s, level);
|
|
}
|
|
}
|
|
}
|
|
|
|
void BreakpointLocation::Dump(Stream *s) const {
|
|
if (s == nullptr)
|
|
return;
|
|
|
|
s->Printf(
|
|
"BreakpointLocation %u: tid = %4.4" PRIx64 " load addr = 0x%8.8" PRIx64
|
|
" state = %s type = %s breakpoint "
|
|
"hw_index = %i hit_count = %-4u ignore_count = %-4u",
|
|
GetID(), GetOptionsNoCreate()->GetThreadSpecNoCreate()->GetTID(),
|
|
(uint64_t)m_address.GetOpcodeLoadAddress(&m_owner.GetTarget()),
|
|
(m_options_ap.get() ? m_options_ap->IsEnabled() : m_owner.IsEnabled())
|
|
? "enabled "
|
|
: "disabled",
|
|
IsHardware() ? "hardware" : "software", GetHardwareIndex(), GetHitCount(),
|
|
GetOptionsNoCreate()->GetIgnoreCount());
|
|
}
|
|
|
|
void BreakpointLocation::SendBreakpointLocationChangedEvent(
|
|
lldb::BreakpointEventType eventKind) {
|
|
if (!m_being_created && !m_owner.IsInternal() &&
|
|
m_owner.GetTarget().EventTypeHasListeners(
|
|
Target::eBroadcastBitBreakpointChanged)) {
|
|
Breakpoint::BreakpointEventData *data = new Breakpoint::BreakpointEventData(
|
|
eventKind, m_owner.shared_from_this());
|
|
data->GetBreakpointLocationCollection().Add(shared_from_this());
|
|
m_owner.GetTarget().BroadcastEvent(Target::eBroadcastBitBreakpointChanged,
|
|
data);
|
|
}
|
|
}
|
|
|
|
void BreakpointLocation::SwapLocation(BreakpointLocationSP swap_from) {
|
|
m_address = swap_from->m_address;
|
|
m_should_resolve_indirect_functions =
|
|
swap_from->m_should_resolve_indirect_functions;
|
|
m_is_reexported = swap_from->m_is_reexported;
|
|
m_is_indirect = swap_from->m_is_indirect;
|
|
m_user_expression_sp.reset();
|
|
}
|