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//===-- SectionLoadHistory.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 "lldb/Target/SectionLoadHistory.h"
#include "lldb/Target/SectionLoadList.h"
#include "lldb/Utility/Stream.h"
using namespace lldb;
using namespace lldb_private;
bool SectionLoadHistory::IsEmpty() const {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
return m_stop_id_to_section_load_list.empty();
}
void SectionLoadHistory::Clear() {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
m_stop_id_to_section_load_list.clear();
}
uint32_t SectionLoadHistory::GetLastStopID() const {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (m_stop_id_to_section_load_list.empty())
return 0;
else
return m_stop_id_to_section_load_list.rbegin()->first;
}
SectionLoadList *
SectionLoadHistory::GetSectionLoadListForStopID(uint32_t stop_id,
bool read_only) {
if (!m_stop_id_to_section_load_list.empty()) {
if (read_only) {
// The section load list is for reading data only so we don't need to
// create a new SectionLoadList for the current stop ID, just return the
// section load list for the stop ID that is equal to or less than the
// current stop ID
if (stop_id == eStopIDNow) {
// If we are asking for the latest and greatest value, it is always at
// the end of our list because that will be the highest stop ID.
StopIDToSectionLoadList::reverse_iterator rpos =
m_stop_id_to_section_load_list.rbegin();
return rpos->second.get();
} else {
StopIDToSectionLoadList::iterator pos =
m_stop_id_to_section_load_list.lower_bound(stop_id);
if (pos != m_stop_id_to_section_load_list.end() &&
pos->first == stop_id)
return pos->second.get();
else if (pos != m_stop_id_to_section_load_list.begin()) {
--pos;
return pos->second.get();
}
}
} else {
// You can only use "eStopIDNow" when reading from the section load
// history
assert(stop_id != eStopIDNow);
// We are updating the section load list (not read only), so if the stop
// ID passed in isn't the same as the last stop ID in our collection,
// then create a new node using the current stop ID
StopIDToSectionLoadList::iterator pos =
m_stop_id_to_section_load_list.lower_bound(stop_id);
if (pos != m_stop_id_to_section_load_list.end() &&
pos->first == stop_id) {
// We already have an entry for this value
return pos->second.get();
}
// We must make a new section load list that is based on the last valid
// section load list, so here we copy the last section load list and add
// a new node for the current stop ID.
StopIDToSectionLoadList::reverse_iterator rpos =
m_stop_id_to_section_load_list.rbegin();
SectionLoadListSP section_load_list_sp(
new SectionLoadList(*rpos->second));
m_stop_id_to_section_load_list[stop_id] = section_load_list_sp;
return section_load_list_sp.get();
}
}
SectionLoadListSP section_load_list_sp(new SectionLoadList());
if (stop_id == eStopIDNow)
stop_id = 0;
m_stop_id_to_section_load_list[stop_id] = section_load_list_sp;
return section_load_list_sp.get();
}
SectionLoadList &SectionLoadHistory::GetCurrentSectionLoadList() {
const bool read_only = true;
std::lock_guard<std::recursive_mutex> guard(m_mutex);
SectionLoadList *section_load_list =
GetSectionLoadListForStopID(eStopIDNow, read_only);
assert(section_load_list != nullptr);
return *section_load_list;
}
addr_t
SectionLoadHistory::GetSectionLoadAddress(uint32_t stop_id,
const lldb::SectionSP §ion_sp) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
const bool read_only = true;
SectionLoadList *section_load_list =
GetSectionLoadListForStopID(stop_id, read_only);
return section_load_list->GetSectionLoadAddress(section_sp);
}
bool SectionLoadHistory::ResolveLoadAddress(uint32_t stop_id, addr_t load_addr,
Address &so_addr) {
// First find the top level section that this load address exists in
std::lock_guard<std::recursive_mutex> guard(m_mutex);
const bool read_only = true;
SectionLoadList *section_load_list =
GetSectionLoadListForStopID(stop_id, read_only);
return section_load_list->ResolveLoadAddress(load_addr, so_addr);
}
bool SectionLoadHistory::SetSectionLoadAddress(
uint32_t stop_id, const lldb::SectionSP §ion_sp, addr_t load_addr,
bool warn_multiple) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
const bool read_only = false;
SectionLoadList *section_load_list =
GetSectionLoadListForStopID(stop_id, read_only);
return section_load_list->SetSectionLoadAddress(section_sp, load_addr,
warn_multiple);
}
size_t
SectionLoadHistory::SetSectionUnloaded(uint32_t stop_id,
const lldb::SectionSP §ion_sp) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
const bool read_only = false;
SectionLoadList *section_load_list =
GetSectionLoadListForStopID(stop_id, read_only);
return section_load_list->SetSectionUnloaded(section_sp);
}
bool SectionLoadHistory::SetSectionUnloaded(uint32_t stop_id,
const lldb::SectionSP §ion_sp,
addr_t load_addr) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
const bool read_only = false;
SectionLoadList *section_load_list =
GetSectionLoadListForStopID(stop_id, read_only);
return section_load_list->SetSectionUnloaded(section_sp, load_addr);
}
void SectionLoadHistory::Dump(Stream &s, Target *target) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
StopIDToSectionLoadList::iterator pos,
end = m_stop_id_to_section_load_list.end();
for (pos = m_stop_id_to_section_load_list.begin(); pos != end; ++pos) {
s.Printf("StopID = %u:\n", pos->first);
pos->second->Dump(s, target);
s.EOL();
}
}
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