1//===-- BreakpointResolverName.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
9#include "lldb/Breakpoint/BreakpointResolverName.h"
10
11#include "lldb/Breakpoint/BreakpointLocation.h"
12#include "lldb/Core/Architecture.h"
13#include "lldb/Core/Module.h"
14#include "lldb/Symbol/Block.h"
15#include "lldb/Symbol/Function.h"
16#include "lldb/Symbol/Symbol.h"
17#include "lldb/Symbol/SymbolContext.h"
18#include "lldb/Target/Language.h"
19#include "lldb/Target/Target.h"
20#include "lldb/Utility/LLDBLog.h"
21#include "lldb/Utility/Log.h"
22#include "lldb/Utility/StreamString.h"
23
24using namespace lldb;
25using namespace lldb_private;
26
27BreakpointResolverName::BreakpointResolverName(const BreakpointSP &bkpt,
28 const char *name_cstr, FunctionNameType name_type_mask,
29 LanguageType language, Breakpoint::MatchType type, lldb::addr_t offset,
30 bool skip_prologue)
31 : BreakpointResolver(bkpt, BreakpointResolver::NameResolver, offset),
32 m_match_type(type), m_language(language), m_skip_prologue(skip_prologue) {
33 if (m_match_type == Breakpoint::Regexp) {
34 m_regex = RegularExpression(name_cstr);
35 if (!m_regex.IsValid()) {
36 Log *log = GetLog(mask: LLDBLog::Breakpoints);
37
38 if (log)
39 log->Warning(fmt: "function name regexp: \"%s\" did not compile.",
40 name_cstr);
41 }
42 } else {
43 AddNameLookup(name: ConstString(name_cstr), name_type_mask);
44 }
45}
46
47BreakpointResolverName::BreakpointResolverName(
48 const BreakpointSP &bkpt, const char *names[], size_t num_names,
49 FunctionNameType name_type_mask, LanguageType language, lldb::addr_t offset,
50 bool skip_prologue)
51 : BreakpointResolver(bkpt, BreakpointResolver::NameResolver, offset),
52 m_match_type(Breakpoint::Exact), m_language(language),
53 m_skip_prologue(skip_prologue) {
54 for (size_t i = 0; i < num_names; i++) {
55 AddNameLookup(name: ConstString(names[i]), name_type_mask);
56 }
57}
58
59BreakpointResolverName::BreakpointResolverName(
60 const BreakpointSP &bkpt, const std::vector<std::string> &names,
61 FunctionNameType name_type_mask, LanguageType language, lldb::addr_t offset,
62 bool skip_prologue)
63 : BreakpointResolver(bkpt, BreakpointResolver::NameResolver, offset),
64 m_match_type(Breakpoint::Exact), m_language(language),
65 m_skip_prologue(skip_prologue) {
66 for (const std::string &name : names) {
67 AddNameLookup(name: ConstString(name.c_str(), name.size()), name_type_mask);
68 }
69}
70
71BreakpointResolverName::BreakpointResolverName(const BreakpointSP &bkpt,
72 RegularExpression func_regex,
73 lldb::LanguageType language,
74 lldb::addr_t offset,
75 bool skip_prologue)
76 : BreakpointResolver(bkpt, BreakpointResolver::NameResolver, offset),
77 m_class_name(nullptr), m_regex(std::move(func_regex)),
78 m_match_type(Breakpoint::Regexp), m_language(language),
79 m_skip_prologue(skip_prologue) {}
80
81BreakpointResolverName::BreakpointResolverName(
82 const BreakpointResolverName &rhs)
83 : BreakpointResolver(rhs.GetBreakpoint(), BreakpointResolver::NameResolver,
84 rhs.GetOffset()),
85 m_lookups(rhs.m_lookups), m_class_name(rhs.m_class_name),
86 m_regex(rhs.m_regex), m_match_type(rhs.m_match_type),
87 m_language(rhs.m_language), m_skip_prologue(rhs.m_skip_prologue) {}
88
89BreakpointResolverSP BreakpointResolverName::CreateFromStructuredData(
90 const StructuredData::Dictionary &options_dict, Status &error) {
91 LanguageType language = eLanguageTypeUnknown;
92 llvm::StringRef language_name;
93 bool success = options_dict.GetValueForKeyAsString(
94 key: GetKey(enum_value: OptionNames::LanguageName), result&: language_name);
95 if (success) {
96 language = Language::GetLanguageTypeFromString(string: language_name);
97 if (language == eLanguageTypeUnknown) {
98 error.SetErrorStringWithFormatv(format: "BRN::CFSD: Unknown language: {0}.",
99 args&: language_name);
100 return nullptr;
101 }
102 }
103
104 lldb::offset_t offset = 0;
105 success =
106 options_dict.GetValueForKeyAsInteger(key: GetKey(enum_value: OptionNames::Offset), result&: offset);
107 if (!success) {
108 error.SetErrorString("BRN::CFSD: Missing offset entry.");
109 return nullptr;
110 }
111
112 bool skip_prologue;
113 success = options_dict.GetValueForKeyAsBoolean(
114 key: GetKey(enum_value: OptionNames::SkipPrologue), result&: skip_prologue);
115 if (!success) {
116 error.SetErrorString("BRN::CFSD: Missing Skip prologue entry.");
117 return nullptr;
118 }
119
120 llvm::StringRef regex_text;
121 success = options_dict.GetValueForKeyAsString(
122 key: GetKey(enum_value: OptionNames::RegexString), result&: regex_text);
123 if (success) {
124 return std::make_shared<BreakpointResolverName>(
125 args: nullptr, args: RegularExpression(regex_text), args&: language, args&: offset,
126 args&: skip_prologue);
127 } else {
128 StructuredData::Array *names_array;
129 success = options_dict.GetValueForKeyAsArray(
130 key: GetKey(enum_value: OptionNames::SymbolNameArray), result&: names_array);
131 if (!success) {
132 error.SetErrorString("BRN::CFSD: Missing symbol names entry.");
133 return nullptr;
134 }
135 StructuredData::Array *names_mask_array;
136 success = options_dict.GetValueForKeyAsArray(
137 key: GetKey(enum_value: OptionNames::NameMaskArray), result&: names_mask_array);
138 if (!success) {
139 error.SetErrorString("BRN::CFSD: Missing symbol names mask entry.");
140 return nullptr;
141 }
142
143 size_t num_elem = names_array->GetSize();
144 if (num_elem != names_mask_array->GetSize()) {
145 error.SetErrorString(
146 "BRN::CFSD: names and names mask arrays have different sizes.");
147 return nullptr;
148 }
149
150 if (num_elem == 0) {
151 error.SetErrorString(
152 "BRN::CFSD: no name entry in a breakpoint by name breakpoint.");
153 return nullptr;
154 }
155 std::vector<std::string> names;
156 std::vector<FunctionNameType> name_masks;
157 for (size_t i = 0; i < num_elem; i++) {
158 std::optional<llvm::StringRef> maybe_name =
159 names_array->GetItemAtIndexAsString(idx: i);
160 if (!maybe_name) {
161 error.SetErrorString("BRN::CFSD: name entry is not a string.");
162 return nullptr;
163 }
164 auto maybe_fnt = names_mask_array->GetItemAtIndexAsInteger<
165 std::underlying_type<FunctionNameType>::type>(idx: i);
166 if (!maybe_fnt) {
167 error.SetErrorString("BRN::CFSD: name mask entry is not an integer.");
168 return nullptr;
169 }
170 names.push_back(x: std::string(*maybe_name));
171 name_masks.push_back(x: static_cast<FunctionNameType>(*maybe_fnt));
172 }
173
174 std::shared_ptr<BreakpointResolverName> resolver_sp =
175 std::make_shared<BreakpointResolverName>(
176 args: nullptr, args: names[0].c_str(), args&: name_masks[0], args&: language,
177 args: Breakpoint::MatchType::Exact, args&: offset, args&: skip_prologue);
178 for (size_t i = 1; i < num_elem; i++) {
179 resolver_sp->AddNameLookup(name: ConstString(names[i]), name_type_mask: name_masks[i]);
180 }
181 return resolver_sp;
182 }
183}
184
185StructuredData::ObjectSP BreakpointResolverName::SerializeToStructuredData() {
186 StructuredData::DictionarySP options_dict_sp(
187 new StructuredData::Dictionary());
188
189 if (m_regex.IsValid()) {
190 options_dict_sp->AddStringItem(key: GetKey(enum_value: OptionNames::RegexString),
191 value: m_regex.GetText());
192 } else {
193 StructuredData::ArraySP names_sp(new StructuredData::Array());
194 StructuredData::ArraySP name_masks_sp(new StructuredData::Array());
195 for (auto lookup : m_lookups) {
196 names_sp->AddItem(item: StructuredData::StringSP(
197 new StructuredData::String(lookup.GetName().GetStringRef())));
198 name_masks_sp->AddItem(item: StructuredData::UnsignedIntegerSP(
199 new StructuredData::UnsignedInteger(lookup.GetNameTypeMask())));
200 }
201 options_dict_sp->AddItem(key: GetKey(enum_value: OptionNames::SymbolNameArray), value_sp: names_sp);
202 options_dict_sp->AddItem(key: GetKey(enum_value: OptionNames::NameMaskArray), value_sp: name_masks_sp);
203 }
204 if (m_language != eLanguageTypeUnknown)
205 options_dict_sp->AddStringItem(
206 key: GetKey(enum_value: OptionNames::LanguageName),
207 value: Language::GetNameForLanguageType(language: m_language));
208 options_dict_sp->AddBooleanItem(key: GetKey(enum_value: OptionNames::SkipPrologue),
209 value: m_skip_prologue);
210
211 return WrapOptionsDict(options_dict_sp);
212}
213
214void BreakpointResolverName::AddNameLookup(ConstString name,
215 FunctionNameType name_type_mask) {
216
217 Module::LookupInfo lookup(name, name_type_mask, m_language);
218 m_lookups.emplace_back(args&: lookup);
219
220 auto add_variant_funcs = [&](Language *lang) {
221 for (Language::MethodNameVariant variant :
222 lang->GetMethodNameVariants(method_name: name)) {
223 // FIXME: Should we be adding variants that aren't of type Full?
224 if (variant.GetType() & lldb::eFunctionNameTypeFull) {
225 Module::LookupInfo variant_lookup(name, variant.GetType(),
226 lang->GetLanguageType());
227 variant_lookup.SetLookupName(variant.GetName());
228 m_lookups.emplace_back(args&: variant_lookup);
229 }
230 }
231 return true;
232 };
233
234 if (Language *lang = Language::FindPlugin(language: m_language)) {
235 add_variant_funcs(lang);
236 } else {
237 // Most likely m_language is eLanguageTypeUnknown. We check each language for
238 // possible variants or more qualified names and create lookups for those as
239 // well.
240 Language::ForEach(callback: add_variant_funcs);
241 }
242}
243
244// FIXME: Right now we look at the module level, and call the module's
245// "FindFunctions".
246// Greg says he will add function tables, maybe at the CompileUnit level to
247// accelerate function lookup. At that point, we should switch the depth to
248// CompileUnit, and look in these tables.
249
250Searcher::CallbackReturn
251BreakpointResolverName::SearchCallback(SearchFilter &filter,
252 SymbolContext &context, Address *addr) {
253 Log *log = GetLog(mask: LLDBLog::Breakpoints);
254
255 if (m_class_name) {
256 if (log)
257 log->Warning(fmt: "Class/method function specification not supported yet.\n");
258 return Searcher::eCallbackReturnStop;
259 }
260
261 SymbolContextList func_list;
262 bool filter_by_cu =
263 (filter.GetFilterRequiredItems() & eSymbolContextCompUnit) != 0;
264 bool filter_by_language = (m_language != eLanguageTypeUnknown);
265
266 ModuleFunctionSearchOptions function_options;
267 function_options.include_symbols = !filter_by_cu;
268 function_options.include_inlines = true;
269
270 switch (m_match_type) {
271 case Breakpoint::Exact:
272 if (context.module_sp) {
273 for (const auto &lookup : m_lookups) {
274 const size_t start_func_idx = func_list.GetSize();
275 context.module_sp->FindFunctions(lookup_info: lookup, parent_decl_ctx: CompilerDeclContext(),
276 options: function_options, sc_list&: func_list);
277
278 const size_t end_func_idx = func_list.GetSize();
279
280 if (start_func_idx < end_func_idx)
281 lookup.Prune(sc_list&: func_list, start_idx: start_func_idx);
282 }
283 }
284 break;
285 case Breakpoint::Regexp:
286 if (context.module_sp) {
287 context.module_sp->FindFunctions(regex: m_regex, options: function_options, sc_list&: func_list);
288 }
289 break;
290 case Breakpoint::Glob:
291 if (log)
292 log->Warning(fmt: "glob is not supported yet.");
293 break;
294 }
295
296 // If the filter specifies a Compilation Unit, remove the ones that don't
297 // pass at this point.
298 if (filter_by_cu || filter_by_language) {
299 uint32_t num_functions = func_list.GetSize();
300
301 for (size_t idx = 0; idx < num_functions; idx++) {
302 bool remove_it = false;
303 SymbolContext sc;
304 func_list.GetContextAtIndex(idx, sc);
305 if (filter_by_cu) {
306 if (!sc.comp_unit || !filter.CompUnitPasses(compUnit&: *sc.comp_unit))
307 remove_it = true;
308 }
309
310 if (filter_by_language) {
311 LanguageType sym_language = sc.GetLanguage();
312 if ((Language::GetPrimaryLanguage(language: sym_language) !=
313 Language::GetPrimaryLanguage(language: m_language)) &&
314 (sym_language != eLanguageTypeUnknown)) {
315 remove_it = true;
316 }
317 }
318
319 if (remove_it) {
320 func_list.RemoveContextAtIndex(idx);
321 num_functions--;
322 idx--;
323 }
324 }
325 }
326
327 BreakpointSP breakpoint_sp = GetBreakpoint();
328 Breakpoint &breakpoint = *breakpoint_sp;
329 Address break_addr;
330
331 // Remove any duplicates between the function list and the symbol list
332 for (const SymbolContext &sc : func_list) {
333 bool is_reexported = false;
334
335 if (sc.block && sc.block->GetInlinedFunctionInfo()) {
336 if (!sc.block->GetStartAddress(addr&: break_addr))
337 break_addr.Clear();
338 } else if (sc.function) {
339 break_addr = sc.function->GetAddressRange().GetBaseAddress();
340 if (m_skip_prologue && break_addr.IsValid()) {
341 const uint32_t prologue_byte_size = sc.function->GetPrologueByteSize();
342 if (prologue_byte_size)
343 break_addr.SetOffset(break_addr.GetOffset() + prologue_byte_size);
344 }
345 } else if (sc.symbol) {
346 if (sc.symbol->GetType() == eSymbolTypeReExported) {
347 const Symbol *actual_symbol =
348 sc.symbol->ResolveReExportedSymbol(target&: breakpoint.GetTarget());
349 if (actual_symbol) {
350 is_reexported = true;
351 break_addr = actual_symbol->GetAddress();
352 }
353 } else {
354 break_addr = sc.symbol->GetAddress();
355 }
356
357 if (m_skip_prologue && break_addr.IsValid()) {
358 const uint32_t prologue_byte_size = sc.symbol->GetPrologueByteSize();
359 if (prologue_byte_size)
360 break_addr.SetOffset(break_addr.GetOffset() + prologue_byte_size);
361 else {
362 const Architecture *arch =
363 breakpoint.GetTarget().GetArchitecturePlugin();
364 if (arch)
365 arch->AdjustBreakpointAddress(func: *sc.symbol, addr&: break_addr);
366 }
367 }
368 }
369
370 if (!break_addr.IsValid())
371 continue;
372
373 if (!filter.AddressPasses(addr&: break_addr))
374 continue;
375
376 bool new_location;
377 BreakpointLocationSP bp_loc_sp(AddLocation(loc_addr: break_addr, new_location: &new_location));
378 bp_loc_sp->SetIsReExported(is_reexported);
379 if (bp_loc_sp && new_location && !breakpoint.IsInternal()) {
380 if (log) {
381 StreamString s;
382 bp_loc_sp->GetDescription(s: &s, level: lldb::eDescriptionLevelVerbose);
383 LLDB_LOGF(log, "Added location: %s\n", s.GetData());
384 }
385 }
386 }
387
388 return Searcher::eCallbackReturnContinue;
389}
390
391lldb::SearchDepth BreakpointResolverName::GetDepth() {
392 return lldb::eSearchDepthModule;
393}
394
395void BreakpointResolverName::GetDescription(Stream *s) {
396 if (m_match_type == Breakpoint::Regexp)
397 s->Printf(format: "regex = '%s'", m_regex.GetText().str().c_str());
398 else {
399 size_t num_names = m_lookups.size();
400 if (num_names == 1)
401 s->Printf(format: "name = '%s'", m_lookups[0].GetName().GetCString());
402 else {
403 s->Printf(format: "names = {");
404 for (size_t i = 0; i < num_names; i++) {
405 s->Printf(format: "%s'%s'", (i == 0 ? "" : ", "),
406 m_lookups[i].GetName().GetCString());
407 }
408 s->Printf(format: "}");
409 }
410 }
411 if (m_language != eLanguageTypeUnknown) {
412 s->Printf(format: ", language = %s", Language::GetNameForLanguageType(language: m_language));
413 }
414}
415
416void BreakpointResolverName::Dump(Stream *s) const {}
417
418lldb::BreakpointResolverSP
419BreakpointResolverName::CopyForBreakpoint(BreakpointSP &breakpoint) {
420 lldb::BreakpointResolverSP ret_sp(new BreakpointResolverName(*this));
421 ret_sp->SetBreakpoint(breakpoint);
422 return ret_sp;
423}
424

source code of lldb/source/Breakpoint/BreakpointResolverName.cpp