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BreakpointSiteList.cpp
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1//===-- BreakpointSiteList.cpp --------------------------------------------===//
2//
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
6//
7//===----------------------------------------------------------------------===//
8
10
11#include "lldb/Utility/Stream.h"
12#include <algorithm>
13
14using namespace lldb;
15using namespace lldb_private;
16
18
20
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.
23
24lldb::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);
28
29 if (iter == m_bp_site_list.end()) {
30 m_bp_site_list.insert(iter, collection::value_type(bp_site_load_addr, bp));
31 return bp->GetID();
32 } else {
34 }
35}
36
38 lldb::break_id_t site_id) {
39 BreakpointSiteSP site_sp(FindByID(site_id));
40 if (site_sp) {
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);
45 }
46 // We should stop here since this BreakpointSite isn't valid anymore or it
47 // doesn't exist.
48 return true;
49}
51 BreakpointSiteSP bp = FindByAddress(addr);
52 if (bp) {
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();
56 }
57 // DBLogIf(PD_LOG_BREAKPOINTS, "BreakpointSiteList::%s ( addr = 0x%8.8"
58 // PRIx64
59 // " ) => NONE", __FUNCTION__, (uint64_t)addr);
61}
62
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);
68 return true;
69 }
70 return false;
71}
72
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);
78 return true;
79 }
80 return false;
81}
82
84public:
85 BreakpointSiteIDMatches(lldb::break_id_t break_id) : m_break_id(break_id) {}
86
87 bool operator()(std::pair<lldb::addr_t, BreakpointSiteSP> val_pair) const {
88 return m_break_id == val_pair.second->GetID();
89 }
90
91private:
93};
94
95BreakpointSiteList::collection::iterator
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
101}
102
103BreakpointSiteList::collection::const_iterator
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
109}
110
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;
117
118 return stop_sp;
119}
120
121const BreakpointSiteSP
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;
128
129 return stop_sp;
130}
131
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;
138 return found_sp;
139}
140
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);
147
148 return false;
149}
150
152 s->Printf("%p: ", static_cast<const void *>(this));
153 // s->Indent();
154 s->Printf("BreakpointSiteList with %u BreakpointSites:\n",
155 (uint32_t)m_bp_site_list.size());
156 s->IndentMore();
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);
161 s->IndentLess();
162}
163
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());
169}
170
172 lldb::addr_t upper_bound,
173 BreakpointSiteList &bp_site_list) const {
174 if (lower_bound > upper_bound)
175 return false;
176
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)
181 return false;
182
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;
188 prev_pos--;
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);
192 }
193
194 upper = m_bp_site_list.upper_bound(upper_bound);
195
196 for (pos = lower; pos != upper; pos++) {
197 bp_site_list.Add((*pos).second);
198 }
199 return true;
200}
BreakpointSiteIDMatches(lldb::break_id_t break_id)
bool operator()(std::pair< lldb::addr_t, BreakpointSiteSP > val_pair) const
const lldb::break_id_t m_break_id
"lldb/Breakpoint/BreakpointSiteList.h" Class that manages lists of BreakpointSite shared pointers.
void Dump(Stream *s) const
Standard Dump routine, doesn't do anything at present.
BreakpointSiteList()
Default constructor makes an empty list.
bool FindInRange(lldb::addr_t lower_bound, lldb::addr_t upper_bound, BreakpointSiteList &bp_site_list) const
collection::iterator GetIDIterator(lldb::break_id_t breakID)
bool BreakpointSiteContainsBreakpoint(lldb::break_id_t bp_site_id, lldb::break_id_t bp_id)
Returns whether the breakpoint site bp_site_id has bp_id.
~BreakpointSiteList()
Destructor, currently does nothing.
lldb::BreakpointSiteSP FindByAddress(lldb::addr_t addr)
Returns a shared pointer to the breakpoint site at address addr.
lldb::BreakpointSiteSP FindByID(lldb::break_id_t breakID)
Returns a shared pointer to the breakpoint site with id breakID.
collection::const_iterator GetIDConstIterator(lldb::break_id_t breakID) const
lldb::break_id_t FindIDByAddress(lldb::addr_t addr)
Returns the breakpoint site id to the breakpoint site at address addr.
bool ShouldStop(StoppointCallbackContext *context, lldb::break_id_t breakID)
Enquires of the breakpoint site on in this list with ID breakID whether we should stop for the breakp...
void ForEach(std::function< void(BreakpointSite *)> const &callback)
bool Remove(lldb::break_id_t breakID)
Removes the breakpoint site given by breakID from this list.
bool RemoveByAddress(lldb::addr_t addr)
Removes the breakpoint site at address addr from this list.
lldb::break_id_t Add(const lldb::BreakpointSiteSP &bp_site_sp)
Add a BreakpointSite to the list.
Class that manages the actual breakpoint that will be inserted into the running program.
General Outline: When we hit a breakpoint we need to package up whatever information is needed to eva...
A stream class that can stream formatted output to a file.
Definition: Stream.h:28
size_t Printf(const char *format,...) __attribute__((format(printf
Output printf formatted output to the stream.
Definition: Stream.cpp:107
void IndentLess(unsigned amount=2)
Decrement the current indentation level.
Definition: Stream.cpp:171
void IndentMore(unsigned amount=2)
Increment the current indentation level.
Definition: Stream.cpp:168
#define LLDB_INVALID_BREAK_ID
Definition: lldb-defines.h:37
A class that represents a running process on the host machine.
Definition: SBAttachInfo.h:14
Definition: SBAddress.h:15
int32_t break_id_t
Definition: lldb-types.h:84
uint64_t addr_t
Definition: lldb-types.h:79