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//===-- BreakpointResolverFileRegex.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/BreakpointResolverFileRegex.h"
#include "lldb/Breakpoint/BreakpointLocation.h"
#include "lldb/Core/SourceManager.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/StreamString.h"
using namespace lldb;
using namespace lldb_private;
// BreakpointResolverFileRegex:
BreakpointResolverFileRegex::BreakpointResolverFileRegex(
const lldb::BreakpointSP &bkpt, RegularExpression regex,
const std::unordered_set<std::string> &func_names, bool exact_match)
: BreakpointResolver(bkpt, BreakpointResolver::FileRegexResolver),
m_regex(std::move(regex)), m_exact_match(exact_match),
m_function_names(func_names) {}
BreakpointResolver *BreakpointResolverFileRegex::CreateFromStructuredData(
const lldb::BreakpointSP &bkpt, const StructuredData::Dictionary &options_dict,
Status &error) {
bool success;
llvm::StringRef regex_string;
success = options_dict.GetValueForKeyAsString(
GetKey(OptionNames::RegexString), regex_string);
if (!success) {
error.SetErrorString("BRFR::CFSD: Couldn't find regex entry.");
return nullptr;
}
RegularExpression regex(regex_string);
bool exact_match;
success = options_dict.GetValueForKeyAsBoolean(
GetKey(OptionNames::ExactMatch), exact_match);
if (!success) {
error.SetErrorString("BRFL::CFSD: Couldn't find exact match entry.");
return nullptr;
}
// The names array is optional:
std::unordered_set<std::string> names_set;
StructuredData::Array *names_array;
success = options_dict.GetValueForKeyAsArray(
GetKey(OptionNames::SymbolNameArray), names_array);
if (success && names_array) {
size_t num_names = names_array->GetSize();
for (size_t i = 0; i < num_names; i++) {
llvm::StringRef name;
success = names_array->GetItemAtIndexAsString(i, name);
if (!success) {
error.SetErrorStringWithFormat(
"BRFR::CFSD: Malformed element %zu in the names array.", i);
return nullptr;
}
names_set.insert(std::string(name));
}
}
return new BreakpointResolverFileRegex(bkpt, std::move(regex), names_set,
exact_match);
}
StructuredData::ObjectSP
BreakpointResolverFileRegex::SerializeToStructuredData() {
StructuredData::DictionarySP options_dict_sp(
new StructuredData::Dictionary());
options_dict_sp->AddStringItem(GetKey(OptionNames::RegexString),
m_regex.GetText());
options_dict_sp->AddBooleanItem(GetKey(OptionNames::ExactMatch),
m_exact_match);
if (!m_function_names.empty()) {
StructuredData::ArraySP names_array_sp(new StructuredData::Array());
for (std::string name : m_function_names) {
StructuredData::StringSP item(new StructuredData::String(name));
names_array_sp->AddItem(item);
}
options_dict_sp->AddItem(GetKey(OptionNames::LineNumber), names_array_sp);
}
return WrapOptionsDict(options_dict_sp);
}
Searcher::CallbackReturn BreakpointResolverFileRegex::SearchCallback(
SearchFilter &filter, SymbolContext &context, Address *addr) {
if (!context.target_sp)
return eCallbackReturnContinue;
CompileUnit *cu = context.comp_unit;
FileSpec cu_file_spec = cu->GetPrimaryFile();
std::vector<uint32_t> line_matches;
context.target_sp->GetSourceManager().FindLinesMatchingRegex(
cu_file_spec, m_regex, 1, UINT32_MAX, line_matches);
uint32_t num_matches = line_matches.size();
for (uint32_t i = 0; i < num_matches; i++) {
SymbolContextList sc_list;
// TODO: Handle SourceLocationSpec column information
SourceLocationSpec location_spec(cu_file_spec, line_matches[i],
/*column=*/std::nullopt,
/*check_inlines=*/false, m_exact_match);
cu->ResolveSymbolContext(location_spec, eSymbolContextEverything, sc_list);
// Find all the function names:
if (!m_function_names.empty()) {
std::vector<size_t> sc_to_remove;
for (size_t i = 0; i < sc_list.GetSize(); i++) {
SymbolContext sc_ctx;
sc_list.GetContextAtIndex(i, sc_ctx);
std::string name(
sc_ctx
.GetFunctionName(
Mangled::NamePreference::ePreferDemangledWithoutArguments)
.AsCString());
if (!m_function_names.count(name)) {
sc_to_remove.push_back(i);
}
}
if (!sc_to_remove.empty()) {
std::vector<size_t>::reverse_iterator iter;
std::vector<size_t>::reverse_iterator rend = sc_to_remove.rend();
for (iter = sc_to_remove.rbegin(); iter != rend; iter++) {
sc_list.RemoveContextAtIndex(*iter);
}
}
}
const bool skip_prologue = true;
BreakpointResolver::SetSCMatchesByLine(filter, sc_list, skip_prologue,
m_regex.GetText());
}
return Searcher::eCallbackReturnContinue;
}
lldb::SearchDepth BreakpointResolverFileRegex::GetDepth() {
return lldb::eSearchDepthCompUnit;
}
void BreakpointResolverFileRegex::GetDescription(Stream *s) {
s->Printf("source regex = \"%s\", exact_match = %d",
m_regex.GetText().str().c_str(), m_exact_match);
}
void BreakpointResolverFileRegex::Dump(Stream *s) const {}
lldb::BreakpointResolverSP
BreakpointResolverFileRegex::CopyForBreakpoint(BreakpointSP &breakpoint) {
lldb::BreakpointResolverSP ret_sp(new BreakpointResolverFileRegex(
breakpoint, m_regex, m_function_names, m_exact_match));
return ret_sp;
}
void BreakpointResolverFileRegex::AddFunctionName(const char *func_name) {
m_function_names.insert(func_name);
}
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