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| //===-- AddressResolverName.cpp ---------------------------------*- C++ -*-===//
//
// 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/Core/AddressResolverName.h"
#include "lldb/Core/Address.h"
#include "lldb/Core/AddressRange.h"
#include "lldb/Core/Module.h"
#include "lldb/Symbol/Function.h"
#include "lldb/Symbol/Symbol.h"
#include "lldb/Symbol/SymbolContext.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/Logging.h"
#include "lldb/Utility/Stream.h"
#include "lldb/lldb-enumerations.h"
#include "lldb/lldb-forward.h"
#include "lldb/lldb-types.h"
#include "llvm/ADT/StringRef.h"
#include <memory>
#include <string>
#include <vector>
#include <stdint.h>
using namespace lldb;
using namespace lldb_private;
AddressResolverName::AddressResolverName(const char *func_name,
AddressResolver::MatchType type)
: AddressResolver(), m_func_name(func_name), m_class_name(nullptr),
m_regex(), m_match_type(type) {
if (m_match_type == AddressResolver::Regexp) {
m_regex = RegularExpression(m_func_name.GetStringRef());
if (!m_regex.IsValid()) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
if (log)
log->Warning("function name regexp: \"%s\" did not compile.",
m_func_name.AsCString());
}
}
}
AddressResolverName::AddressResolverName(RegularExpression func_regex)
: AddressResolver(), m_func_name(nullptr), m_class_name(nullptr),
m_regex(std::move(func_regex)), m_match_type(AddressResolver::Regexp) {}
AddressResolverName::AddressResolverName(const char *class_name,
const char *method,
AddressResolver::MatchType type)
: AddressResolver(), m_func_name(method), m_class_name(class_name),
m_regex(), m_match_type(type) {}
AddressResolverName::~AddressResolverName() = default;
// FIXME: Right now we look at the module level, and call the module's
// "FindFunctions".
// Greg says he will add function tables, maybe at the CompileUnit level to
// accelerate function lookup. At that point, we should switch the depth to
// CompileUnit, and look in these tables.
Searcher::CallbackReturn
AddressResolverName::SearchCallback(SearchFilter &filter,
SymbolContext &context, Address *addr) {
SymbolContextList func_list;
SymbolContextList sym_list;
bool skip_prologue = true;
uint32_t i;
SymbolContext sc;
Address func_addr;
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_BREAKPOINTS));
if (m_class_name) {
if (log)
log->Warning("Class/method function specification not supported yet.\n");
return Searcher::eCallbackReturnStop;
}
const bool include_symbols = false;
const bool include_inlines = true;
switch (m_match_type) {
case AddressResolver::Exact:
if (context.module_sp) {
context.module_sp->FindSymbolsWithNameAndType(m_func_name,
eSymbolTypeCode, sym_list);
context.module_sp->FindFunctions(m_func_name, nullptr,
eFunctionNameTypeAuto, include_symbols,
include_inlines, func_list);
}
break;
case AddressResolver::Regexp:
if (context.module_sp) {
context.module_sp->FindSymbolsMatchingRegExAndType(
m_regex, eSymbolTypeCode, sym_list);
context.module_sp->FindFunctions(m_regex, include_symbols,
include_inlines, func_list);
}
break;
case AddressResolver::Glob:
if (log)
log->Warning("glob is not supported yet.");
break;
}
// Remove any duplicates between the function list and the symbol list
if (func_list.GetSize()) {
for (i = 0; i < func_list.GetSize(); i++) {
if (!func_list.GetContextAtIndex(i, sc))
continue;
if (sc.function == nullptr)
continue;
uint32_t j = 0;
while (j < sym_list.GetSize()) {
SymbolContext symbol_sc;
if (sym_list.GetContextAtIndex(j, symbol_sc)) {
if (symbol_sc.symbol && symbol_sc.symbol->ValueIsAddress()) {
if (sc.function->GetAddressRange().GetBaseAddress() ==
symbol_sc.symbol->GetAddressRef()) {
sym_list.RemoveContextAtIndex(j);
continue; // Don't increment j
}
}
}
j++;
}
}
for (i = 0; i < func_list.GetSize(); i++) {
if (func_list.GetContextAtIndex(i, sc)) {
if (sc.function) {
func_addr = sc.function->GetAddressRange().GetBaseAddress();
addr_t byte_size = sc.function->GetAddressRange().GetByteSize();
if (skip_prologue) {
const uint32_t prologue_byte_size =
sc.function->GetPrologueByteSize();
if (prologue_byte_size) {
func_addr.SetOffset(func_addr.GetOffset() + prologue_byte_size);
byte_size -= prologue_byte_size;
}
}
if (filter.AddressPasses(func_addr)) {
AddressRange new_range(func_addr, byte_size);
m_address_ranges.push_back(new_range);
}
}
}
}
}
for (i = 0; i < sym_list.GetSize(); i++) {
if (sym_list.GetContextAtIndex(i, sc)) {
if (sc.symbol && sc.symbol->ValueIsAddress()) {
func_addr = sc.symbol->GetAddressRef();
addr_t byte_size = sc.symbol->GetByteSize();
if (skip_prologue) {
const uint32_t prologue_byte_size = sc.symbol->GetPrologueByteSize();
if (prologue_byte_size) {
func_addr.SetOffset(func_addr.GetOffset() + prologue_byte_size);
byte_size -= prologue_byte_size;
}
}
if (filter.AddressPasses(func_addr)) {
AddressRange new_range(func_addr, byte_size);
m_address_ranges.push_back(new_range);
}
}
}
}
return Searcher::eCallbackReturnContinue;
}
lldb::SearchDepth AddressResolverName::GetDepth() {
return lldb::eSearchDepthModule;
}
void AddressResolverName::GetDescription(Stream *s) {
s->PutCString("Address by function name: ");
if (m_match_type == AddressResolver::Regexp)
s->Printf("'%s' (regular expression)", m_regex.GetText().str().c_str());
else
s->Printf("'%s'", m_func_name.AsCString());
}
|