1 //===-- BreakpointSiteList.cpp ----------------------------------*- C++ -*-===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 #include "lldb/Breakpoint/BreakpointSiteList.h"
11 #include "lldb/Utility/Stream.h"
15 using namespace lldb_private;
17 BreakpointSiteList::BreakpointSiteList() : m_mutex(), m_bp_site_list() {}
19 BreakpointSiteList::~BreakpointSiteList() {}
21 // Add breakpoint site to the list. However, if the element already exists in
22 // the list, then we don't add it, and return LLDB_INVALID_BREAK_ID.
24 lldb::break_id_t BreakpointSiteList::Add(const BreakpointSiteSP &bp) {
25 lldb::addr_t bp_site_load_addr = bp->GetLoadAddress();
26 std::lock_guard<std::recursive_mutex> guard(m_mutex);
27 collection::iterator iter = m_bp_site_list.find(bp_site_load_addr);
29 if (iter == m_bp_site_list.end()) {
30 m_bp_site_list.insert(iter, collection::value_type(bp_site_load_addr, bp));
33 return LLDB_INVALID_BREAK_ID;
37 bool BreakpointSiteList::ShouldStop(StoppointCallbackContext *context,
38 lldb::break_id_t site_id) {
39 BreakpointSiteSP site_sp(FindByID(site_id));
41 // Let the BreakpointSite decide if it should stop here (could not have
42 // reached it's target hit count yet, or it could have a callback that
43 // decided it shouldn't stop (shared library loads/unloads).
44 return site_sp->ShouldStop(context);
46 // We should stop here since this BreakpointSite isn't valid anymore or it
50 lldb::break_id_t BreakpointSiteList::FindIDByAddress(lldb::addr_t addr) {
51 BreakpointSiteSP bp = FindByAddress(addr);
53 // DBLogIf(PD_LOG_BREAKPOINTS, "BreakpointSiteList::%s ( addr = 0x%8.8"
54 // PRIx64 " ) => %u", __FUNCTION__, (uint64_t)addr, bp->GetID());
55 return bp.get()->GetID();
57 // DBLogIf(PD_LOG_BREAKPOINTS, "BreakpointSiteList::%s ( addr = 0x%8.8"
59 // " ) => NONE", __FUNCTION__, (uint64_t)addr);
60 return LLDB_INVALID_BREAK_ID;
63 bool BreakpointSiteList::Remove(lldb::break_id_t break_id) {
64 std::lock_guard<std::recursive_mutex> guard(m_mutex);
65 collection::iterator pos = GetIDIterator(break_id); // Predicate
66 if (pos != m_bp_site_list.end()) {
67 m_bp_site_list.erase(pos);
73 bool BreakpointSiteList::RemoveByAddress(lldb::addr_t address) {
74 std::lock_guard<std::recursive_mutex> guard(m_mutex);
75 collection::iterator pos = m_bp_site_list.find(address);
76 if (pos != m_bp_site_list.end()) {
77 m_bp_site_list.erase(pos);
83 class BreakpointSiteIDMatches {
85 BreakpointSiteIDMatches(lldb::break_id_t break_id) : m_break_id(break_id) {}
87 bool operator()(std::pair<lldb::addr_t, BreakpointSiteSP> val_pair) const {
88 return m_break_id == val_pair.second->GetID();
92 const lldb::break_id_t m_break_id;
95 BreakpointSiteList::collection::iterator
96 BreakpointSiteList::GetIDIterator(lldb::break_id_t break_id) {
97 std::lock_guard<std::recursive_mutex> guard(m_mutex);
98 return std::find_if(m_bp_site_list.begin(),
99 m_bp_site_list.end(), // Search full range
100 BreakpointSiteIDMatches(break_id)); // Predicate
103 BreakpointSiteList::collection::const_iterator
104 BreakpointSiteList::GetIDConstIterator(lldb::break_id_t break_id) const {
105 std::lock_guard<std::recursive_mutex> guard(m_mutex);
106 return std::find_if(m_bp_site_list.begin(),
107 m_bp_site_list.end(), // Search full range
108 BreakpointSiteIDMatches(break_id)); // Predicate
111 BreakpointSiteSP BreakpointSiteList::FindByID(lldb::break_id_t break_id) {
112 std::lock_guard<std::recursive_mutex> guard(m_mutex);
113 BreakpointSiteSP stop_sp;
114 collection::iterator pos = GetIDIterator(break_id);
115 if (pos != m_bp_site_list.end())
116 stop_sp = pos->second;
121 const BreakpointSiteSP
122 BreakpointSiteList::FindByID(lldb::break_id_t break_id) const {
123 std::lock_guard<std::recursive_mutex> guard(m_mutex);
124 BreakpointSiteSP stop_sp;
125 collection::const_iterator pos = GetIDConstIterator(break_id);
126 if (pos != m_bp_site_list.end())
127 stop_sp = pos->second;
132 BreakpointSiteSP BreakpointSiteList::FindByAddress(lldb::addr_t addr) {
133 BreakpointSiteSP found_sp;
134 std::lock_guard<std::recursive_mutex> guard(m_mutex);
135 collection::iterator iter = m_bp_site_list.find(addr);
136 if (iter != m_bp_site_list.end())
137 found_sp = iter->second;
141 bool BreakpointSiteList::BreakpointSiteContainsBreakpoint(
142 lldb::break_id_t bp_site_id, lldb::break_id_t bp_id) {
143 std::lock_guard<std::recursive_mutex> guard(m_mutex);
144 collection::const_iterator pos = GetIDConstIterator(bp_site_id);
145 if (pos != m_bp_site_list.end())
146 return pos->second->IsBreakpointAtThisSite(bp_id);
151 void BreakpointSiteList::Dump(Stream *s) const {
152 s->Printf("%p: ", static_cast<const void *>(this));
154 s->Printf("BreakpointSiteList with %u BreakpointSites:\n",
155 (uint32_t)m_bp_site_list.size());
157 collection::const_iterator pos;
158 collection::const_iterator end = m_bp_site_list.end();
159 for (pos = m_bp_site_list.begin(); pos != end; ++pos)
160 pos->second->Dump(s);
164 void BreakpointSiteList::ForEach(
165 std::function<void(BreakpointSite *)> const &callback) {
166 std::lock_guard<std::recursive_mutex> guard(m_mutex);
167 for (auto pair : m_bp_site_list)
168 callback(pair.second.get());
171 bool BreakpointSiteList::FindInRange(lldb::addr_t lower_bound,
172 lldb::addr_t upper_bound,
173 BreakpointSiteList &bp_site_list) const {
174 if (lower_bound > upper_bound)
177 std::lock_guard<std::recursive_mutex> guard(m_mutex);
178 collection::const_iterator lower, upper, pos;
179 lower = m_bp_site_list.lower_bound(lower_bound);
180 if (lower == m_bp_site_list.end() || (*lower).first >= upper_bound)
183 // This is one tricky bit. The breakpoint might overlap the bottom end of
184 // the range. So we grab the breakpoint prior to the lower bound, and check
185 // that that + its byte size isn't in our range.
186 if (lower != m_bp_site_list.begin()) {
187 collection::const_iterator prev_pos = lower;
189 const BreakpointSiteSP &prev_bp = (*prev_pos).second;
190 if (prev_bp->GetLoadAddress() + prev_bp->GetByteSize() > lower_bound)
191 bp_site_list.Add(prev_bp);
194 upper = m_bp_site_list.upper_bound(upper_bound);
196 for (pos = lower; pos != upper; pos++) {
197 bp_site_list.Add((*pos).second);