1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317
|
//===-- BreakpointLocationList.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/Breakpoint/BreakpointLocationList.h"
#include "lldb/Breakpoint/Breakpoint.h"
#include "lldb/Breakpoint/BreakpointLocation.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/Section.h"
#include "lldb/Target/SectionLoadList.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/ArchSpec.h"
using namespace lldb;
using namespace lldb_private;
BreakpointLocationList::BreakpointLocationList(Breakpoint &owner)
: m_owner(owner), m_next_id(0), m_new_location_recorder(nullptr) {}
BreakpointLocationList::~BreakpointLocationList() = default;
BreakpointLocationSP
BreakpointLocationList::Create(const Address &addr,
bool resolve_indirect_symbols) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
// The location ID is just the size of the location list + 1
lldb::break_id_t bp_loc_id = ++m_next_id;
BreakpointLocationSP bp_loc_sp(
new BreakpointLocation(bp_loc_id, m_owner, addr, LLDB_INVALID_THREAD_ID,
m_owner.IsHardware(), resolve_indirect_symbols));
m_locations.push_back(bp_loc_sp);
m_address_to_location[addr] = bp_loc_sp;
return bp_loc_sp;
}
bool BreakpointLocationList::ShouldStop(StoppointCallbackContext *context,
lldb::break_id_t break_id) {
BreakpointLocationSP bp = FindByID(break_id);
if (bp) {
// Let the BreakpointLocation decide if it should stop here (could not have
// reached it's target hit count yet, or it could have a callback that
// decided it shouldn't stop (shared library loads/unloads).
return bp->ShouldStop(context);
}
// We should stop here since this BreakpointLocation isn't valid anymore or
// it doesn't exist.
return true;
}
lldb::break_id_t BreakpointLocationList::FindIDByAddress(const Address &addr) {
BreakpointLocationSP bp_loc_sp = FindByAddress(addr);
if (bp_loc_sp) {
return bp_loc_sp->GetID();
}
return LLDB_INVALID_BREAK_ID;
}
static bool Compare(BreakpointLocationSP lhs, lldb::break_id_t val) {
return lhs->GetID() < val;
}
BreakpointLocationSP
BreakpointLocationList::FindByID(lldb::break_id_t break_id) const {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
collection::const_iterator end = m_locations.end();
collection::const_iterator pos =
llvm::lower_bound(m_locations, break_id, Compare);
if (pos != end && (*pos)->GetID() == break_id)
return *(pos);
else
return BreakpointLocationSP();
}
size_t BreakpointLocationList::FindInModule(
Module *module, BreakpointLocationCollection &bp_loc_list) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
const size_t orig_size = bp_loc_list.GetSize();
collection::iterator pos, end = m_locations.end();
for (pos = m_locations.begin(); pos != end; ++pos) {
BreakpointLocationSP break_loc = (*pos);
SectionSP section_sp(break_loc->GetAddress().GetSection());
if (section_sp && section_sp->GetModule().get() == module) {
bp_loc_list.Add(break_loc);
}
}
return bp_loc_list.GetSize() - orig_size;
}
const BreakpointLocationSP
BreakpointLocationList::FindByAddress(const Address &addr) const {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
BreakpointLocationSP bp_loc_sp;
if (!m_locations.empty()) {
Address so_addr;
if (addr.IsSectionOffset()) {
so_addr = addr;
} else {
// Try and resolve as a load address if possible.
m_owner.GetTarget().GetSectionLoadList().ResolveLoadAddress(
addr.GetOffset(), so_addr);
if (!so_addr.IsValid()) {
// The address didn't resolve, so just set to passed in addr.
so_addr = addr;
}
}
addr_map::const_iterator pos = m_address_to_location.find(so_addr);
if (pos != m_address_to_location.end())
bp_loc_sp = pos->second;
}
return bp_loc_sp;
}
void BreakpointLocationList::Dump(Stream *s) const {
s->Printf("%p: ", static_cast<const void *>(this));
// s->Indent();
std::lock_guard<std::recursive_mutex> guard(m_mutex);
s->Printf("BreakpointLocationList with %" PRIu64 " BreakpointLocations:\n",
(uint64_t)m_locations.size());
s->IndentMore();
collection::const_iterator pos, end = m_locations.end();
for (pos = m_locations.begin(); pos != end; ++pos)
(*pos)->Dump(s);
s->IndentLess();
}
BreakpointLocationSP BreakpointLocationList::GetByIndex(size_t i) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
BreakpointLocationSP bp_loc_sp;
if (i < m_locations.size())
bp_loc_sp = m_locations[i];
return bp_loc_sp;
}
const BreakpointLocationSP BreakpointLocationList::GetByIndex(size_t i) const {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
BreakpointLocationSP bp_loc_sp;
if (i < m_locations.size())
bp_loc_sp = m_locations[i];
return bp_loc_sp;
}
void BreakpointLocationList::ClearAllBreakpointSites() {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
collection::iterator pos, end = m_locations.end();
for (pos = m_locations.begin(); pos != end; ++pos)
(*pos)->ClearBreakpointSite();
}
void BreakpointLocationList::ResolveAllBreakpointSites() {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
collection::iterator pos, end = m_locations.end();
for (pos = m_locations.begin(); pos != end; ++pos) {
if ((*pos)->IsEnabled())
(*pos)->ResolveBreakpointSite();
}
}
uint32_t BreakpointLocationList::GetHitCount() const {
uint32_t hit_count = 0;
std::lock_guard<std::recursive_mutex> guard(m_mutex);
collection::const_iterator pos, end = m_locations.end();
for (pos = m_locations.begin(); pos != end; ++pos)
hit_count += (*pos)->GetHitCount();
return hit_count;
}
void BreakpointLocationList::ResetHitCount() {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
for (auto &loc : m_locations)
loc->ResetHitCount();
}
size_t BreakpointLocationList::GetNumResolvedLocations() const {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
size_t resolve_count = 0;
collection::const_iterator pos, end = m_locations.end();
for (pos = m_locations.begin(); pos != end; ++pos) {
if ((*pos)->IsResolved())
++resolve_count;
}
return resolve_count;
}
void BreakpointLocationList::GetDescription(Stream *s,
lldb::DescriptionLevel level) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
collection::iterator pos, end = m_locations.end();
for (pos = m_locations.begin(); pos != end; ++pos) {
s->Printf(" ");
(*pos)->GetDescription(s, level);
}
}
BreakpointLocationSP BreakpointLocationList::AddLocation(
const Address &addr, bool resolve_indirect_symbols, bool *new_location) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (new_location)
*new_location = false;
BreakpointLocationSP bp_loc_sp(FindByAddress(addr));
if (!bp_loc_sp) {
bp_loc_sp = Create(addr, resolve_indirect_symbols);
if (bp_loc_sp) {
bp_loc_sp->ResolveBreakpointSite();
if (new_location)
*new_location = true;
if (m_new_location_recorder) {
m_new_location_recorder->Add(bp_loc_sp);
}
}
}
return bp_loc_sp;
}
void BreakpointLocationList::SwapLocation(
BreakpointLocationSP to_location_sp,
BreakpointLocationSP from_location_sp) {
if (!from_location_sp || !to_location_sp)
return;
m_address_to_location.erase(to_location_sp->GetAddress());
to_location_sp->SwapLocation(from_location_sp);
RemoveLocation(from_location_sp);
m_address_to_location[to_location_sp->GetAddress()] = to_location_sp;
to_location_sp->ResolveBreakpointSite();
}
bool BreakpointLocationList::RemoveLocation(
const lldb::BreakpointLocationSP &bp_loc_sp) {
if (bp_loc_sp) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
m_address_to_location.erase(bp_loc_sp->GetAddress());
size_t num_locations = m_locations.size();
for (size_t idx = 0; idx < num_locations; idx++) {
if (m_locations[idx].get() == bp_loc_sp.get()) {
RemoveLocationByIndex(idx);
return true;
}
}
}
return false;
}
void BreakpointLocationList::RemoveLocationByIndex(size_t idx) {
assert (idx < m_locations.size());
m_address_to_location.erase(m_locations[idx]->GetAddress());
m_locations.erase(m_locations.begin() + idx);
}
void BreakpointLocationList::RemoveInvalidLocations(const ArchSpec &arch) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
size_t idx = 0;
// Don't cache m_location.size() as it will change since we might remove
// locations from our vector...
while (idx < m_locations.size()) {
BreakpointLocation *bp_loc = m_locations[idx].get();
if (bp_loc->GetAddress().SectionWasDeleted()) {
// Section was deleted which means this breakpoint comes from a module
// that is no longer valid, so we should remove it.
RemoveLocationByIndex(idx);
continue;
}
if (arch.IsValid()) {
ModuleSP module_sp(bp_loc->GetAddress().GetModule());
if (module_sp) {
if (!arch.IsCompatibleMatch(module_sp->GetArchitecture())) {
// The breakpoint was in a module whose architecture is no longer
// compatible with "arch", so we need to remove it
RemoveLocationByIndex(idx);
continue;
}
}
}
// Only increment the index if we didn't remove the locations at index
// "idx"
++idx;
}
}
void BreakpointLocationList::StartRecordingNewLocations(
BreakpointLocationCollection &new_locations) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
assert(m_new_location_recorder == nullptr);
m_new_location_recorder = &new_locations;
}
void BreakpointLocationList::StopRecordingNewLocations() {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
m_new_location_recorder = nullptr;
}
void BreakpointLocationList::Compact() {
lldb::break_id_t highest_id = 0;
for (BreakpointLocationSP loc_sp : m_locations) {
lldb::break_id_t cur_id = loc_sp->GetID();
if (cur_id > highest_id)
highest_id = cur_id;
}
m_next_id = highest_id;
}
|