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| //===-- ThreadPlanRunToAddress.cpp ------------------------------*- C++ -*-===//
//
// 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 "lldb/Target/ThreadPlanRunToAddress.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Thread.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/Stream.h"
using namespace lldb;
using namespace lldb_private;
// ThreadPlanRunToAddress: Continue plan
ThreadPlanRunToAddress::ThreadPlanRunToAddress(Thread &thread, Address &address,
bool stop_others)
: ThreadPlan(ThreadPlan::eKindRunToAddress, "Run to address plan", thread,
eVoteNoOpinion, eVoteNoOpinion),
m_stop_others(stop_others), m_addresses(), m_break_ids() {
m_addresses.push_back(
address.GetOpcodeLoadAddress(m_thread.CalculateTarget().get()));
SetInitialBreakpoints();
}
ThreadPlanRunToAddress::ThreadPlanRunToAddress(Thread &thread,
lldb::addr_t address,
bool stop_others)
: ThreadPlan(ThreadPlan::eKindRunToAddress, "Run to address plan", thread,
eVoteNoOpinion, eVoteNoOpinion),
m_stop_others(stop_others), m_addresses(), m_break_ids() {
m_addresses.push_back(
m_thread.CalculateTarget()->GetOpcodeLoadAddress(address));
SetInitialBreakpoints();
}
ThreadPlanRunToAddress::ThreadPlanRunToAddress(
Thread &thread, const std::vector<lldb::addr_t> &addresses,
bool stop_others)
: ThreadPlan(ThreadPlan::eKindRunToAddress, "Run to address plan", thread,
eVoteNoOpinion, eVoteNoOpinion),
m_stop_others(stop_others), m_addresses(addresses), m_break_ids() {
// Convert all addresses into opcode addresses to make sure we set
// breakpoints at the correct address.
Target &target = thread.GetProcess()->GetTarget();
std::vector<lldb::addr_t>::iterator pos, end = m_addresses.end();
for (pos = m_addresses.begin(); pos != end; ++pos)
*pos = target.GetOpcodeLoadAddress(*pos);
SetInitialBreakpoints();
}
void ThreadPlanRunToAddress::SetInitialBreakpoints() {
size_t num_addresses = m_addresses.size();
m_break_ids.resize(num_addresses);
for (size_t i = 0; i < num_addresses; i++) {
Breakpoint *breakpoint;
breakpoint = m_thread.CalculateTarget()
->CreateBreakpoint(m_addresses[i], true, false)
.get();
if (breakpoint != nullptr) {
if (breakpoint->IsHardware() && !breakpoint->HasResolvedLocations())
m_could_not_resolve_hw_bp = true;
m_break_ids[i] = breakpoint->GetID();
breakpoint->SetThreadID(m_thread.GetID());
breakpoint->SetBreakpointKind("run-to-address");
}
}
}
ThreadPlanRunToAddress::~ThreadPlanRunToAddress() {
size_t num_break_ids = m_break_ids.size();
for (size_t i = 0; i < num_break_ids; i++) {
m_thread.CalculateTarget()->RemoveBreakpointByID(m_break_ids[i]);
}
m_could_not_resolve_hw_bp = false;
}
void ThreadPlanRunToAddress::GetDescription(Stream *s,
lldb::DescriptionLevel level) {
size_t num_addresses = m_addresses.size();
if (level == lldb::eDescriptionLevelBrief) {
if (num_addresses == 0) {
s->Printf("run to address with no addresses given.");
return;
} else if (num_addresses == 1)
s->Printf("run to address: ");
else
s->Printf("run to addresses: ");
for (size_t i = 0; i < num_addresses; i++) {
s->Address(m_addresses[i], sizeof(addr_t));
s->Printf(" ");
}
} else {
if (num_addresses == 0) {
s->Printf("run to address with no addresses given.");
return;
} else if (num_addresses == 1)
s->Printf("Run to address: ");
else {
s->Printf("Run to addresses: ");
}
for (size_t i = 0; i < num_addresses; i++) {
if (num_addresses > 1) {
s->Printf("\n");
s->Indent();
}
s->Address(m_addresses[i], sizeof(addr_t));
s->Printf(" using breakpoint: %d - ", m_break_ids[i]);
Breakpoint *breakpoint =
m_thread.CalculateTarget()->GetBreakpointByID(m_break_ids[i]).get();
if (breakpoint)
breakpoint->Dump(s);
else
s->Printf("but the breakpoint has been deleted.");
}
}
}
bool ThreadPlanRunToAddress::ValidatePlan(Stream *error) {
if (m_could_not_resolve_hw_bp) {
if (error)
error->Printf("Could not set hardware breakpoint(s)");
return false;
}
// If we couldn't set the breakpoint for some reason, then this won't work.
bool all_bps_good = true;
size_t num_break_ids = m_break_ids.size();
for (size_t i = 0; i < num_break_ids; i++) {
if (m_break_ids[i] == LLDB_INVALID_BREAK_ID) {
all_bps_good = false;
if (error) {
error->Printf("Could not set breakpoint for address: ");
error->Address(m_addresses[i], sizeof(addr_t));
error->Printf("\n");
}
}
}
return all_bps_good;
}
bool ThreadPlanRunToAddress::DoPlanExplainsStop(Event *event_ptr) {
return AtOurAddress();
}
bool ThreadPlanRunToAddress::ShouldStop(Event *event_ptr) {
return AtOurAddress();
}
bool ThreadPlanRunToAddress::StopOthers() { return m_stop_others; }
void ThreadPlanRunToAddress::SetStopOthers(bool new_value) {
m_stop_others = new_value;
}
StateType ThreadPlanRunToAddress::GetPlanRunState() { return eStateRunning; }
bool ThreadPlanRunToAddress::WillStop() { return true; }
bool ThreadPlanRunToAddress::MischiefManaged() {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_STEP));
if (AtOurAddress()) {
// Remove the breakpoint
size_t num_break_ids = m_break_ids.size();
for (size_t i = 0; i < num_break_ids; i++) {
if (m_break_ids[i] != LLDB_INVALID_BREAK_ID) {
m_thread.CalculateTarget()->RemoveBreakpointByID(m_break_ids[i]);
m_break_ids[i] = LLDB_INVALID_BREAK_ID;
}
}
LLDB_LOGF(log, "Completed run to address plan.");
ThreadPlan::MischiefManaged();
return true;
} else
return false;
}
bool ThreadPlanRunToAddress::AtOurAddress() {
lldb::addr_t current_address = m_thread.GetRegisterContext()->GetPC();
bool found_it = false;
size_t num_addresses = m_addresses.size();
for (size_t i = 0; i < num_addresses; i++) {
if (m_addresses[i] == current_address) {
found_it = true;
break;
}
}
return found_it;
}
|