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llvm-project/lldb/source/Symbol/SymbolContext.cpp

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//===-- SymbolContext.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/Symbol/SymbolContext.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Host/Host.h"
#include "lldb/Host/StringConvert.h"
#include "lldb/Symbol/Block.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/Symbol.h"
#include "lldb/Symbol/SymbolFile.h"
#include "lldb/Symbol/SymbolVendor.h"
#include "lldb/Symbol/Variable.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/StreamString.h"
using namespace lldb;
using namespace lldb_private;
SymbolContext::SymbolContext()
: target_sp(), module_sp(), comp_unit(nullptr), function(nullptr),
block(nullptr), line_entry(), symbol(nullptr), variable(nullptr) {}
SymbolContext::SymbolContext(const ModuleSP &m, CompileUnit *cu, Function *f,
Block *b, LineEntry *le, Symbol *s)
: target_sp(), module_sp(m), comp_unit(cu), function(f), block(b),
line_entry(), symbol(s), variable(nullptr) {
if (le)
line_entry = *le;
}
SymbolContext::SymbolContext(const TargetSP &t, const ModuleSP &m,
CompileUnit *cu, Function *f, Block *b,
LineEntry *le, Symbol *s)
: target_sp(t), module_sp(m), comp_unit(cu), function(f), block(b),
line_entry(), symbol(s), variable(nullptr) {
if (le)
line_entry = *le;
}
SymbolContext::SymbolContext(SymbolContextScope *sc_scope)
: target_sp(), module_sp(), comp_unit(nullptr), function(nullptr),
block(nullptr), line_entry(), symbol(nullptr), variable(nullptr) {
sc_scope->CalculateSymbolContext(this);
}
SymbolContext::~SymbolContext() {}
const SymbolContext &SymbolContext::operator=(const SymbolContext &rhs) {
if (this != &rhs) {
target_sp = rhs.target_sp;
module_sp = rhs.module_sp;
comp_unit = rhs.comp_unit;
function = rhs.function;
block = rhs.block;
line_entry = rhs.line_entry;
symbol = rhs.symbol;
variable = rhs.variable;
}
return *this;
}
void SymbolContext::Clear(bool clear_target) {
if (clear_target)
target_sp.reset();
module_sp.reset();
comp_unit = nullptr;
function = nullptr;
block = nullptr;
line_entry.Clear();
symbol = nullptr;
variable = nullptr;
}
bool SymbolContext::DumpStopContext(Stream *s, ExecutionContextScope *exe_scope,
const Address &addr, bool show_fullpaths,
bool show_module, bool show_inlined_frames,
bool show_function_arguments,
bool show_function_name) const {
bool dumped_something = false;
if (show_module && module_sp) {
if (show_fullpaths)
*s << module_sp->GetFileSpec();
else
*s << module_sp->GetFileSpec().GetFilename();
s->PutChar('`');
dumped_something = true;
}
if (function != nullptr) {
SymbolContext inline_parent_sc;
Address inline_parent_addr;
if (!show_function_name) {
s->Printf("<");
dumped_something = true;
} else {
ConstString name;
if (!show_function_arguments)
name = function->GetNameNoArguments();
if (!name)
name = function->GetName();
if (name)
name.Dump(s);
}
if (addr.IsValid()) {
const addr_t function_offset =
addr.GetOffset() -
function->GetAddressRange().GetBaseAddress().GetOffset();
if (!show_function_name) {
// Print +offset even if offset is 0
dumped_something = true;
s->Printf("+%" PRIu64 ">", function_offset);
} else if (function_offset) {
dumped_something = true;
s->Printf(" + %" PRIu64, function_offset);
}
}
if (GetParentOfInlinedScope(addr, inline_parent_sc, inline_parent_addr)) {
dumped_something = true;
Block *inlined_block = block->GetContainingInlinedBlock();
const InlineFunctionInfo *inlined_block_info =
inlined_block->GetInlinedFunctionInfo();
s->Printf(
" [inlined] %s",
inlined_block_info->GetName(function->GetLanguage()).GetCString());
lldb_private::AddressRange block_range;
if (inlined_block->GetRangeContainingAddress(addr, block_range)) {
const addr_t inlined_function_offset =
addr.GetOffset() - block_range.GetBaseAddress().GetOffset();
if (inlined_function_offset) {
s->Printf(" + %" PRIu64, inlined_function_offset);
}
}
const Declaration &call_site = inlined_block_info->GetCallSite();
if (call_site.IsValid()) {
s->PutCString(" at ");
call_site.DumpStopContext(s, show_fullpaths);
}
if (show_inlined_frames) {
s->EOL();
s->Indent();
const bool show_function_name = true;
return inline_parent_sc.DumpStopContext(
s, exe_scope, inline_parent_addr, show_fullpaths, show_module,
show_inlined_frames, show_function_arguments, show_function_name);
}
} else {
if (line_entry.IsValid()) {
dumped_something = true;
s->PutCString(" at ");
if (line_entry.DumpStopContext(s, show_fullpaths))
dumped_something = true;
}
}
} else if (symbol != nullptr) {
if (!show_function_name) {
s->Printf("<");
dumped_something = true;
} else if (symbol->GetName()) {
dumped_something = true;
if (symbol->GetType() == eSymbolTypeTrampoline)
s->PutCString("symbol stub for: ");
symbol->GetName().Dump(s);
}
if (addr.IsValid() && symbol->ValueIsAddress()) {
const addr_t symbol_offset =
addr.GetOffset() - symbol->GetAddressRef().GetOffset();
if (!show_function_name) {
// Print +offset even if offset is 0
dumped_something = true;
s->Printf("+%" PRIu64 ">", symbol_offset);
} else if (symbol_offset) {
dumped_something = true;
s->Printf(" + %" PRIu64, symbol_offset);
}
}
} else if (addr.IsValid()) {
addr.Dump(s, exe_scope, Address::DumpStyleModuleWithFileAddress);
dumped_something = true;
}
return dumped_something;
}
void SymbolContext::GetDescription(Stream *s, lldb::DescriptionLevel level,
Target *target) const {
if (module_sp) {
s->Indent(" Module: file = \"");
module_sp->GetFileSpec().Dump(s);
*s << '"';
if (module_sp->GetArchitecture().IsValid())
s->Printf(", arch = \"%s\"",
module_sp->GetArchitecture().GetArchitectureName());
s->EOL();
}
if (comp_unit != nullptr) {
s->Indent("CompileUnit: ");
comp_unit->GetDescription(s, level);
s->EOL();
}
if (function != nullptr) {
s->Indent(" Function: ");
function->GetDescription(s, level, target);
s->EOL();
Type *func_type = function->GetType();
if (func_type) {
s->Indent(" FuncType: ");
func_type->GetDescription(s, level, false);
s->EOL();
}
}
if (block != nullptr) {
std::vector<Block *> blocks;
blocks.push_back(block);
Block *parent_block = block->GetParent();
while (parent_block) {
blocks.push_back(parent_block);
parent_block = parent_block->GetParent();
}
std::vector<Block *>::reverse_iterator pos;
std::vector<Block *>::reverse_iterator begin = blocks.rbegin();
std::vector<Block *>::reverse_iterator end = blocks.rend();
for (pos = begin; pos != end; ++pos) {
if (pos == begin)
s->Indent(" Blocks: ");
else
s->Indent(" ");
(*pos)->GetDescription(s, function, level, target);
s->EOL();
}
}
if (line_entry.IsValid()) {
s->Indent(" LineEntry: ");
line_entry.GetDescription(s, level, comp_unit, target, false);
s->EOL();
}
if (symbol != nullptr) {
s->Indent(" Symbol: ");
symbol->GetDescription(s, level, target);
s->EOL();
}
if (variable != nullptr) {
s->Indent(" Variable: ");
s->Printf("id = {0x%8.8" PRIx64 "}, ", variable->GetID());
switch (variable->GetScope()) {
case eValueTypeVariableGlobal:
s->PutCString("kind = global, ");
break;
case eValueTypeVariableStatic:
s->PutCString("kind = static, ");
break;
case eValueTypeVariableArgument:
s->PutCString("kind = argument, ");
break;
case eValueTypeVariableLocal:
s->PutCString("kind = local, ");
break;
case eValueTypeVariableThreadLocal:
s->PutCString("kind = thread local, ");
break;
default:
break;
}
s->Printf("name = \"%s\"\n", variable->GetName().GetCString());
}
}
uint32_t SymbolContext::GetResolvedMask() const {
uint32_t resolved_mask = 0;
if (target_sp)
resolved_mask |= eSymbolContextTarget;
if (module_sp)
resolved_mask |= eSymbolContextModule;
if (comp_unit)
resolved_mask |= eSymbolContextCompUnit;
if (function)
resolved_mask |= eSymbolContextFunction;
if (block)
resolved_mask |= eSymbolContextBlock;
if (line_entry.IsValid())
resolved_mask |= eSymbolContextLineEntry;
if (symbol)
resolved_mask |= eSymbolContextSymbol;
if (variable)
resolved_mask |= eSymbolContextVariable;
return resolved_mask;
}
void SymbolContext::Dump(Stream *s, Target *target) const {
*s << this << ": ";
s->Indent();
s->PutCString("SymbolContext");
s->IndentMore();
s->EOL();
s->IndentMore();
s->Indent();
*s << "Module = " << module_sp.get() << ' ';
if (module_sp)
module_sp->GetFileSpec().Dump(s);
s->EOL();
s->Indent();
*s << "CompileUnit = " << comp_unit;
if (comp_unit != nullptr)
*s << " {0x" << comp_unit->GetID() << "} "
<< *(static_cast<FileSpec *>(comp_unit));
s->EOL();
s->Indent();
*s << "Function = " << function;
if (function != nullptr) {
*s << " {0x" << function->GetID() << "} " << function->GetType()->GetName()
<< ", address-range = ";
function->GetAddressRange().Dump(s, target, Address::DumpStyleLoadAddress,
Address::DumpStyleModuleWithFileAddress);
s->EOL();
s->Indent();
Type *func_type = function->GetType();
if (func_type) {
*s << " Type = ";
func_type->Dump(s, false);
}
}
s->EOL();
s->Indent();
*s << "Block = " << block;
if (block != nullptr)
*s << " {0x" << block->GetID() << '}';
// Dump the block and pass it a negative depth to we print all the parent
// blocks if (block != NULL)
// block->Dump(s, function->GetFileAddress(), INT_MIN);
s->EOL();
s->Indent();
*s << "LineEntry = ";
line_entry.Dump(s, target, true, Address::DumpStyleLoadAddress,
Address::DumpStyleModuleWithFileAddress, true);
s->EOL();
s->Indent();
*s << "Symbol = " << symbol;
if (symbol != nullptr && symbol->GetMangled())
*s << ' ' << symbol->GetName().AsCString();
s->EOL();
*s << "Variable = " << variable;
if (variable != nullptr) {
*s << " {0x" << variable->GetID() << "} " << variable->GetType()->GetName();
s->EOL();
}
s->IndentLess();
s->IndentLess();
}
bool lldb_private::operator==(const SymbolContext &lhs,
const SymbolContext &rhs) {
return lhs.function == rhs.function && lhs.symbol == rhs.symbol &&
lhs.module_sp.get() == rhs.module_sp.get() &&
lhs.comp_unit == rhs.comp_unit &&
lhs.target_sp.get() == rhs.target_sp.get() &&
LineEntry::Compare(lhs.line_entry, rhs.line_entry) == 0 &&
lhs.variable == rhs.variable;
}
bool lldb_private::operator!=(const SymbolContext &lhs,
const SymbolContext &rhs) {
return !(lhs == rhs);
}
bool SymbolContext::GetAddressRange(uint32_t scope, uint32_t range_idx,
bool use_inline_block_range,
AddressRange &range) const {
if ((scope & eSymbolContextLineEntry) && line_entry.IsValid()) {
range = line_entry.range;
return true;
}
if ((scope & eSymbolContextBlock) && (block != nullptr)) {
if (use_inline_block_range) {
Block *inline_block = block->GetContainingInlinedBlock();
if (inline_block)
return inline_block->GetRangeAtIndex(range_idx, range);
} else {
return block->GetRangeAtIndex(range_idx, range);
}
}
if ((scope & eSymbolContextFunction) && (function != nullptr)) {
if (range_idx == 0) {
range = function->GetAddressRange();
return true;
}
}
if ((scope & eSymbolContextSymbol) && (symbol != nullptr)) {
if (range_idx == 0) {
if (symbol->ValueIsAddress()) {
range.GetBaseAddress() = symbol->GetAddressRef();
range.SetByteSize(symbol->GetByteSize());
return true;
}
}
}
range.Clear();
return false;
}
LanguageType SymbolContext::GetLanguage() const {
LanguageType lang;
if (function && (lang = function->GetLanguage()) != eLanguageTypeUnknown) {
return lang;
} else if (variable &&
(lang = variable->GetLanguage()) != eLanguageTypeUnknown) {
return lang;
} else if (symbol && (lang = symbol->GetLanguage()) != eLanguageTypeUnknown) {
return lang;
} else if (comp_unit &&
(lang = comp_unit->GetLanguage()) != eLanguageTypeUnknown) {
return lang;
} else if (symbol) {
// If all else fails, try to guess the language from the name.
return symbol->GetMangled().GuessLanguage();
}
return eLanguageTypeUnknown;
}
bool SymbolContext::GetParentOfInlinedScope(const Address &curr_frame_pc,
SymbolContext &next_frame_sc,
Address &next_frame_pc) const {
next_frame_sc.Clear(false);
next_frame_pc.Clear();
if (block) {
// const addr_t curr_frame_file_addr = curr_frame_pc.GetFileAddress();
// In order to get the parent of an inlined function we first need to see
// if we are in an inlined block as "this->block" could be an inlined
// block, or a parent of "block" could be. So lets check if this block or
// one of this blocks parents is an inlined function.
Block *curr_inlined_block = block->GetContainingInlinedBlock();
if (curr_inlined_block) {
// "this->block" is contained in an inline function block, so to get the
// scope above the inlined block, we get the parent of the inlined block
// itself
Block *next_frame_block = curr_inlined_block->GetParent();
// Now calculate the symbol context of the containing block
next_frame_block->CalculateSymbolContext(&next_frame_sc);
// If we get here we weren't able to find the return line entry using the
// nesting of the blocks and the line table. So just use the call site
// info from our inlined block.
AddressRange range;
if (curr_inlined_block->GetRangeContainingAddress(curr_frame_pc, range)) {
// To see there this new frame block it, we need to look at the call
// site information from
const InlineFunctionInfo *curr_inlined_block_inlined_info =
curr_inlined_block->GetInlinedFunctionInfo();
next_frame_pc = range.GetBaseAddress();
next_frame_sc.line_entry.range.GetBaseAddress() = next_frame_pc;
next_frame_sc.line_entry.file =
curr_inlined_block_inlined_info->GetCallSite().GetFile();
next_frame_sc.line_entry.original_file =
curr_inlined_block_inlined_info->GetCallSite().GetFile();
next_frame_sc.line_entry.line =
curr_inlined_block_inlined_info->GetCallSite().GetLine();
next_frame_sc.line_entry.column =
curr_inlined_block_inlined_info->GetCallSite().GetColumn();
return true;
} else {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_SYMBOLS));
if (log) {
LLDB_LOGF(
log,
"warning: inlined block 0x%8.8" PRIx64
" doesn't have a range that contains file address 0x%" PRIx64,
curr_inlined_block->GetID(), curr_frame_pc.GetFileAddress());
}
#ifdef LLDB_CONFIGURATION_DEBUG
else {
ObjectFile *objfile = nullptr;
if (module_sp) {
if (SymbolFile *symbol_file = module_sp->GetSymbolFile())
objfile = symbol_file->GetObjectFile();
}
if (objfile) {
Host::SystemLog(
Host::eSystemLogWarning,
"warning: inlined block 0x%8.8" PRIx64
" doesn't have a range that contains file address 0x%" PRIx64
" in %s\n",
curr_inlined_block->GetID(), curr_frame_pc.GetFileAddress(),
objfile->GetFileSpec().GetPath().c_str());
} else {
Host::SystemLog(
Host::eSystemLogWarning,
"warning: inlined block 0x%8.8" PRIx64
" doesn't have a range that contains file address 0x%" PRIx64
"\n",
curr_inlined_block->GetID(), curr_frame_pc.GetFileAddress());
}
}
#endif
}
}
}
return false;
}
Block *SymbolContext::GetFunctionBlock() {
if (function) {
if (block) {
// If this symbol context has a block, check to see if this block is
// itself, or is contained within a block with inlined function
// information. If so, then the inlined block is the block that defines
// the function.
Block *inlined_block = block->GetContainingInlinedBlock();
if (inlined_block)
return inlined_block;
// The block in this symbol context is not inside an inlined block, so
// the block that defines the function is the function's top level block,
// which is returned below.
}
// There is no block information in this symbol context, so we must assume
// that the block that is desired is the top level block of the function
// itself.
return &function->GetBlock(true);
}
return nullptr;
}
bool SymbolContext::GetFunctionMethodInfo(lldb::LanguageType &language,
bool &is_instance_method,
ConstString &language_object_name)
{
Block *function_block = GetFunctionBlock();
if (function_block) {
CompilerDeclContext decl_ctx = function_block->GetDeclContext();
if (decl_ctx)
return decl_ctx.IsClassMethod(&language, &is_instance_method,
&language_object_name);
}
return false;
}
void SymbolContext::SortTypeList(TypeMap &type_map, TypeList &type_list) const {
Block *curr_block = block;
bool isInlinedblock = false;
if (curr_block != nullptr &&
curr_block->GetContainingInlinedBlock() != nullptr)
isInlinedblock = true;
// Find all types that match the current block if we have one and put them
// first in the list. Keep iterating up through all blocks.
while (curr_block != nullptr && !isInlinedblock) {
type_map.ForEach(
[curr_block, &type_list](const lldb::TypeSP &type_sp) -> bool {
SymbolContextScope *scs = type_sp->GetSymbolContextScope();
if (scs && curr_block == scs->CalculateSymbolContextBlock())
type_list.Insert(type_sp);
return true; // Keep iterating
});
// Remove any entries that are now in "type_list" from "type_map" since we
// can't remove from type_map while iterating
type_list.ForEach([&type_map](const lldb::TypeSP &type_sp) -> bool {
type_map.Remove(type_sp);
return true; // Keep iterating
});
curr_block = curr_block->GetParent();
}
// Find all types that match the current function, if we have onem, and put
// them next in the list.
if (function != nullptr && !type_map.Empty()) {
const size_t old_type_list_size = type_list.GetSize();
type_map.ForEach([this, &type_list](const lldb::TypeSP &type_sp) -> bool {
SymbolContextScope *scs = type_sp->GetSymbolContextScope();
if (scs && function == scs->CalculateSymbolContextFunction())
type_list.Insert(type_sp);
return true; // Keep iterating
});
// Remove any entries that are now in "type_list" from "type_map" since we
// can't remove from type_map while iterating
const size_t new_type_list_size = type_list.GetSize();
if (new_type_list_size > old_type_list_size) {
for (size_t i = old_type_list_size; i < new_type_list_size; ++i)
type_map.Remove(type_list.GetTypeAtIndex(i));
}
}
// Find all types that match the current compile unit, if we have one, and
// put them next in the list.
if (comp_unit != nullptr && !type_map.Empty()) {
const size_t old_type_list_size = type_list.GetSize();
type_map.ForEach([this, &type_list](const lldb::TypeSP &type_sp) -> bool {
SymbolContextScope *scs = type_sp->GetSymbolContextScope();
if (scs && comp_unit == scs->CalculateSymbolContextCompileUnit())
type_list.Insert(type_sp);
return true; // Keep iterating
});
// Remove any entries that are now in "type_list" from "type_map" since we
// can't remove from type_map while iterating
const size_t new_type_list_size = type_list.GetSize();
if (new_type_list_size > old_type_list_size) {
for (size_t i = old_type_list_size; i < new_type_list_size; ++i)
type_map.Remove(type_list.GetTypeAtIndex(i));
}
}
// Find all types that match the current module, if we have one, and put them
// next in the list.
if (module_sp && !type_map.Empty()) {
const size_t old_type_list_size = type_list.GetSize();
type_map.ForEach([this, &type_list](const lldb::TypeSP &type_sp) -> bool {
SymbolContextScope *scs = type_sp->GetSymbolContextScope();
if (scs && module_sp == scs->CalculateSymbolContextModule())
type_list.Insert(type_sp);
return true; // Keep iterating
});
// Remove any entries that are now in "type_list" from "type_map" since we
// can't remove from type_map while iterating
const size_t new_type_list_size = type_list.GetSize();
if (new_type_list_size > old_type_list_size) {
for (size_t i = old_type_list_size; i < new_type_list_size; ++i)
type_map.Remove(type_list.GetTypeAtIndex(i));
}
}
// Any types that are left get copied into the list an any order.
if (!type_map.Empty()) {
type_map.ForEach([&type_list](const lldb::TypeSP &type_sp) -> bool {
type_list.Insert(type_sp);
return true; // Keep iterating
});
}
}
ConstString
SymbolContext::GetFunctionName(Mangled::NamePreference preference) const {
if (function) {
if (block) {
Block *inlined_block = block->GetContainingInlinedBlock();
if (inlined_block) {
const InlineFunctionInfo *inline_info =
inlined_block->GetInlinedFunctionInfo();
if (inline_info)
return inline_info->GetName(function->GetLanguage());
}
}
return function->GetMangled().GetName(function->GetLanguage(), preference);
} else if (symbol && symbol->ValueIsAddress()) {
return symbol->GetMangled().GetName(symbol->GetLanguage(), preference);
} else {
// No function, return an empty string.
return ConstString();
}
}
LineEntry SymbolContext::GetFunctionStartLineEntry() const {
LineEntry line_entry;
Address start_addr;
if (block) {
Block *inlined_block = block->GetContainingInlinedBlock();
if (inlined_block) {
if (inlined_block->GetStartAddress(start_addr)) {
if (start_addr.CalculateSymbolContextLineEntry(line_entry))
return line_entry;
}
return LineEntry();
}
}
if (function) {
if (function->GetAddressRange()
.GetBaseAddress()
.CalculateSymbolContextLineEntry(line_entry))
return line_entry;
}
return LineEntry();
}
bool SymbolContext::GetAddressRangeFromHereToEndLine(uint32_t end_line,
AddressRange &range,
Status &error) {
if (!line_entry.IsValid()) {
error.SetErrorString("Symbol context has no line table.");
return false;
}
range = line_entry.range;
if (line_entry.line > end_line) {
error.SetErrorStringWithFormat(
"end line option %d must be after the current line: %d", end_line,
line_entry.line);
return false;
}
uint32_t line_index = 0;
bool found = false;
while (true) {
LineEntry this_line;
line_index = comp_unit->FindLineEntry(line_index, line_entry.line, nullptr,
false, &this_line);
if (line_index == UINT32_MAX)
break;
if (LineEntry::Compare(this_line, line_entry) == 0) {
found = true;
break;
}
}
LineEntry end_entry;
if (!found) {
// Can't find the index of the SymbolContext's line entry in the
// SymbolContext's CompUnit.
error.SetErrorString(
"Can't find the current line entry in the CompUnit - can't process "
"the end-line option");
return false;
}
line_index = comp_unit->FindLineEntry(line_index, end_line, nullptr, false,
&end_entry);
if (line_index == UINT32_MAX) {
error.SetErrorStringWithFormat(
"could not find a line table entry corresponding "
"to end line number %d",
end_line);
return false;
}
Block *func_block = GetFunctionBlock();
if (func_block &&
func_block->GetRangeIndexContainingAddress(
end_entry.range.GetBaseAddress()) == UINT32_MAX) {
error.SetErrorStringWithFormat(
"end line number %d is not contained within the current function.",
end_line);
return false;
}
lldb::addr_t range_size = end_entry.range.GetBaseAddress().GetFileAddress() -
range.GetBaseAddress().GetFileAddress();
range.SetByteSize(range_size);
return true;
}
const Symbol *
SymbolContext::FindBestGlobalDataSymbol(ConstString name, Status &error) {
error.Clear();
if (!target_sp) {
return nullptr;
}
Target &target = *target_sp;
Module *module = module_sp.get();
auto ProcessMatches = [this, &name, &target, module]
(SymbolContextList &sc_list, Status &error) -> const Symbol* {
llvm::SmallVector<const Symbol *, 1> external_symbols;
llvm::SmallVector<const Symbol *, 1> internal_symbols;
const uint32_t matches = sc_list.GetSize();
for (uint32_t i = 0; i < matches; ++i) {
SymbolContext sym_ctx;
sc_list.GetContextAtIndex(i, sym_ctx);
if (sym_ctx.symbol) {
const Symbol *symbol = sym_ctx.symbol;
const Address sym_address = symbol->GetAddress();
if (sym_address.IsValid()) {
switch (symbol->GetType()) {
case eSymbolTypeData:
case eSymbolTypeRuntime:
case eSymbolTypeAbsolute:
case eSymbolTypeObjCClass:
case eSymbolTypeObjCMetaClass:
case eSymbolTypeObjCIVar:
if (symbol->GetDemangledNameIsSynthesized()) {
// If the demangled name was synthesized, then don't use it for
// expressions. Only let the symbol match if the mangled named
// matches for these symbols.
if (symbol->GetMangled().GetMangledName() != name)
break;
}
if (symbol->IsExternal()) {
external_symbols.push_back(symbol);
} else {
internal_symbols.push_back(symbol);
}
break;
case eSymbolTypeReExported: {
ConstString reexport_name = symbol->GetReExportedSymbolName();
if (reexport_name) {
ModuleSP reexport_module_sp;
ModuleSpec reexport_module_spec;
reexport_module_spec.GetPlatformFileSpec() =
symbol->GetReExportedSymbolSharedLibrary();
if (reexport_module_spec.GetPlatformFileSpec()) {
reexport_module_sp =
target.GetImages().FindFirstModule(reexport_module_spec);
if (!reexport_module_sp) {
reexport_module_spec.GetPlatformFileSpec()
.GetDirectory()
.Clear();
reexport_module_sp =
target.GetImages().FindFirstModule(reexport_module_spec);
}
}
// Don't allow us to try and resolve a re-exported symbol if it
// is the same as the current symbol
if (name == symbol->GetReExportedSymbolName() &&
module == reexport_module_sp.get())
return nullptr;
return FindBestGlobalDataSymbol(
symbol->GetReExportedSymbolName(), error);
}
} break;
case eSymbolTypeCode: // We already lookup functions elsewhere
case eSymbolTypeVariable:
case eSymbolTypeLocal:
case eSymbolTypeParam:
case eSymbolTypeTrampoline:
case eSymbolTypeInvalid:
case eSymbolTypeException:
case eSymbolTypeSourceFile:
case eSymbolTypeHeaderFile:
case eSymbolTypeObjectFile:
case eSymbolTypeCommonBlock:
case eSymbolTypeBlock:
case eSymbolTypeVariableType:
case eSymbolTypeLineEntry:
case eSymbolTypeLineHeader:
case eSymbolTypeScopeBegin:
case eSymbolTypeScopeEnd:
case eSymbolTypeAdditional:
case eSymbolTypeCompiler:
case eSymbolTypeInstrumentation:
case eSymbolTypeUndefined:
case eSymbolTypeResolver:
break;
}
}
}
}
if (external_symbols.size() > 1) {
StreamString ss;
ss.Printf("Multiple external symbols found for '%s'\n", name.AsCString());
for (const Symbol *symbol : external_symbols) {
symbol->GetDescription(&ss, eDescriptionLevelFull, &target);
}
ss.PutChar('\n');
error.SetErrorString(ss.GetData());
return nullptr;
} else if (external_symbols.size()) {
return external_symbols[0];
} else if (internal_symbols.size() > 1) {
StreamString ss;
ss.Printf("Multiple internal symbols found for '%s'\n", name.AsCString());
for (const Symbol *symbol : internal_symbols) {
symbol->GetDescription(&ss, eDescriptionLevelVerbose, &target);
ss.PutChar('\n');
}
error.SetErrorString(ss.GetData());
return nullptr;
} else if (internal_symbols.size()) {
return internal_symbols[0];
} else {
return nullptr;
}
};
if (module) {
SymbolContextList sc_list;
module->FindSymbolsWithNameAndType(name, eSymbolTypeAny, sc_list);
const Symbol *const module_symbol = ProcessMatches(sc_list, error);
if (!error.Success()) {
return nullptr;
} else if (module_symbol) {
return module_symbol;
}
}
{
SymbolContextList sc_list;
target.GetImages().FindSymbolsWithNameAndType(name, eSymbolTypeAny,
sc_list);
const Symbol *const target_symbol = ProcessMatches(sc_list, error);
if (!error.Success()) {
return nullptr;
} else if (target_symbol) {
return target_symbol;
}
}
return nullptr; // no error; we just didn't find anything
}
//
// SymbolContextSpecifier
//
SymbolContextSpecifier::SymbolContextSpecifier(const TargetSP &target_sp)
: m_target_sp(target_sp), m_module_spec(), m_module_sp(), m_file_spec_up(),
m_start_line(0), m_end_line(0), m_function_spec(), m_class_name(),
m_address_range_up(), m_type(eNothingSpecified) {}
SymbolContextSpecifier::~SymbolContextSpecifier() {}
bool SymbolContextSpecifier::AddLineSpecification(uint32_t line_no,
SpecificationType type) {
bool return_value = true;
switch (type) {
case eNothingSpecified:
Clear();
break;
case eLineStartSpecified:
m_start_line = line_no;
m_type |= eLineStartSpecified;
break;
case eLineEndSpecified:
m_end_line = line_no;
m_type |= eLineEndSpecified;
break;
default:
return_value = false;
break;
}
return return_value;
}
bool SymbolContextSpecifier::AddSpecification(const char *spec_string,
SpecificationType type) {
bool return_value = true;
switch (type) {
case eNothingSpecified:
Clear();
break;
case eModuleSpecified: {
// See if we can find the Module, if so stick it in the SymbolContext.
FileSpec module_file_spec(spec_string);
ModuleSpec module_spec(module_file_spec);
lldb::ModuleSP module_sp(
m_target_sp->GetImages().FindFirstModule(module_spec));
m_type |= eModuleSpecified;
if (module_sp)
m_module_sp = module_sp;
else
m_module_spec.assign(spec_string);
} break;
case eFileSpecified:
// CompUnits can't necessarily be resolved here, since an inlined function
// might show up in a number of CompUnits. Instead we just convert to a
// FileSpec and store it away.
m_file_spec_up.reset(new FileSpec(spec_string));
m_type |= eFileSpecified;
break;
case eLineStartSpecified:
m_start_line = StringConvert::ToSInt32(spec_string, 0, 0, &return_value);
if (return_value)
m_type |= eLineStartSpecified;
break;
case eLineEndSpecified:
m_end_line = StringConvert::ToSInt32(spec_string, 0, 0, &return_value);
if (return_value)
m_type |= eLineEndSpecified;
break;
case eFunctionSpecified:
m_function_spec.assign(spec_string);
m_type |= eFunctionSpecified;
break;
case eClassOrNamespaceSpecified:
Clear();
m_class_name.assign(spec_string);
m_type = eClassOrNamespaceSpecified;
break;
case eAddressRangeSpecified:
// Not specified yet...
break;
}
return return_value;
}
void SymbolContextSpecifier::Clear() {
m_module_spec.clear();
m_file_spec_up.reset();
m_function_spec.clear();
m_class_name.clear();
m_start_line = 0;
m_end_line = 0;
m_address_range_up.reset();
m_type = eNothingSpecified;
}
bool SymbolContextSpecifier::SymbolContextMatches(SymbolContext &sc) {
if (m_type == eNothingSpecified)
return true;
if (m_target_sp.get() != sc.target_sp.get())
return false;
if (m_type & eModuleSpecified) {
if (sc.module_sp) {
if (m_module_sp.get() != nullptr) {
if (m_module_sp.get() != sc.module_sp.get())
return false;
} else {
FileSpec module_file_spec(m_module_spec);
if (!FileSpec::Equal(module_file_spec, sc.module_sp->GetFileSpec(),
false))
return false;
}
}
}
if (m_type & eFileSpecified) {
if (m_file_spec_up) {
// If we don't have a block or a comp_unit, then we aren't going to match
// a source file.
if (sc.block == nullptr && sc.comp_unit == nullptr)
return false;
// Check if the block is present, and if so is it inlined:
bool was_inlined = false;
if (sc.block != nullptr) {
const InlineFunctionInfo *inline_info =
sc.block->GetInlinedFunctionInfo();
if (inline_info != nullptr) {
was_inlined = true;
if (!FileSpec::Equal(inline_info->GetDeclaration().GetFile(),
*(m_file_spec_up.get()), false))
return false;
}
}
// Next check the comp unit, but only if the SymbolContext was not
// inlined.
if (!was_inlined && sc.comp_unit != nullptr) {
if (!FileSpec::Equal(*(sc.comp_unit), *(m_file_spec_up.get()), false))
return false;
}
}
}
if (m_type & eLineStartSpecified || m_type & eLineEndSpecified) {
if (sc.line_entry.line < m_start_line || sc.line_entry.line > m_end_line)
return false;
}
if (m_type & eFunctionSpecified) {
// First check the current block, and if it is inlined, get the inlined
// function name:
bool was_inlined = false;
ConstString func_name(m_function_spec.c_str());
if (sc.block != nullptr) {
const InlineFunctionInfo *inline_info =
sc.block->GetInlinedFunctionInfo();
if (inline_info != nullptr) {
was_inlined = true;
const Mangled &name = inline_info->GetMangled();
if (!name.NameMatches(func_name, sc.function->GetLanguage()))
return false;
}
}
// If it wasn't inlined, check the name in the function or symbol:
if (!was_inlined) {
if (sc.function != nullptr) {
if (!sc.function->GetMangled().NameMatches(func_name,
sc.function->GetLanguage()))
return false;
} else if (sc.symbol != nullptr) {
if (!sc.symbol->GetMangled().NameMatches(func_name,
sc.symbol->GetLanguage()))
return false;
}
}
}
return true;
}
bool SymbolContextSpecifier::AddressMatches(lldb::addr_t addr) {
if (m_type & eAddressRangeSpecified) {
} else {
Address match_address(addr, nullptr);
SymbolContext sc;
m_target_sp->GetImages().ResolveSymbolContextForAddress(
match_address, eSymbolContextEverything, sc);
return SymbolContextMatches(sc);
}
return true;
}
void SymbolContextSpecifier::GetDescription(
Stream *s, lldb::DescriptionLevel level) const {
char path_str[PATH_MAX + 1];
if (m_type == eNothingSpecified) {
s->Printf("Nothing specified.\n");
}
if (m_type == eModuleSpecified) {
s->Indent();
if (m_module_sp) {
m_module_sp->GetFileSpec().GetPath(path_str, PATH_MAX);
s->Printf("Module: %s\n", path_str);
} else
s->Printf("Module: %s\n", m_module_spec.c_str());
}
if (m_type == eFileSpecified && m_file_spec_up != nullptr) {
m_file_spec_up->GetPath(path_str, PATH_MAX);
s->Indent();
s->Printf("File: %s", path_str);
if (m_type == eLineStartSpecified) {
s->Printf(" from line %" PRIu64 "", (uint64_t)m_start_line);
if (m_type == eLineEndSpecified)
s->Printf("to line %" PRIu64 "", (uint64_t)m_end_line);
else
s->Printf("to end");
} else if (m_type == eLineEndSpecified) {
s->Printf(" from start to line %" PRIu64 "", (uint64_t)m_end_line);
}
s->Printf(".\n");
}
if (m_type == eLineStartSpecified) {
s->Indent();
s->Printf("From line %" PRIu64 "", (uint64_t)m_start_line);
if (m_type == eLineEndSpecified)
s->Printf("to line %" PRIu64 "", (uint64_t)m_end_line);
else
s->Printf("to end");
s->Printf(".\n");
} else if (m_type == eLineEndSpecified) {
s->Printf("From start to line %" PRIu64 ".\n", (uint64_t)m_end_line);
}
if (m_type == eFunctionSpecified) {
s->Indent();
s->Printf("Function: %s.\n", m_function_spec.c_str());
}
if (m_type == eClassOrNamespaceSpecified) {
s->Indent();
s->Printf("Class name: %s.\n", m_class_name.c_str());
}
if (m_type == eAddressRangeSpecified && m_address_range_up != nullptr) {
s->Indent();
s->PutCString("Address range: ");
m_address_range_up->Dump(s, m_target_sp.get(),
Address::DumpStyleLoadAddress,
Address::DumpStyleFileAddress);
s->PutCString("\n");
}
}
//
// SymbolContextList
//
SymbolContextList::SymbolContextList() : m_symbol_contexts() {}
SymbolContextList::~SymbolContextList() {}
void SymbolContextList::Append(const SymbolContext &sc) {
m_symbol_contexts.push_back(sc);
}
void SymbolContextList::Append(const SymbolContextList &sc_list) {
collection::const_iterator pos, end = sc_list.m_symbol_contexts.end();
for (pos = sc_list.m_symbol_contexts.begin(); pos != end; ++pos)
m_symbol_contexts.push_back(*pos);
}
uint32_t SymbolContextList::AppendIfUnique(const SymbolContextList &sc_list,
bool merge_symbol_into_function) {
uint32_t unique_sc_add_count = 0;
collection::const_iterator pos, end = sc_list.m_symbol_contexts.end();
for (pos = sc_list.m_symbol_contexts.begin(); pos != end; ++pos) {
if (AppendIfUnique(*pos, merge_symbol_into_function))
++unique_sc_add_count;
}
return unique_sc_add_count;
}
bool SymbolContextList::AppendIfUnique(const SymbolContext &sc,
bool merge_symbol_into_function) {
collection::iterator pos, end = m_symbol_contexts.end();
for (pos = m_symbol_contexts.begin(); pos != end; ++pos) {
if (*pos == sc)
return false;
}
if (merge_symbol_into_function && sc.symbol != nullptr &&
sc.comp_unit == nullptr && sc.function == nullptr &&
sc.block == nullptr && !sc.line_entry.IsValid()) {
if (sc.symbol->ValueIsAddress()) {
for (pos = m_symbol_contexts.begin(); pos != end; ++pos) {
// Don't merge symbols into inlined function symbol contexts
if (pos->block && pos->block->GetContainingInlinedBlock())
continue;
if (pos->function) {
if (pos->function->GetAddressRange().GetBaseAddress() ==
sc.symbol->GetAddressRef()) {
// Do we already have a function with this symbol?
if (pos->symbol == sc.symbol)
return false;
if (pos->symbol == nullptr) {
pos->symbol = sc.symbol;
return false;
}
}
}
}
}
}
m_symbol_contexts.push_back(sc);
return true;
}
void SymbolContextList::Clear() { m_symbol_contexts.clear(); }
void SymbolContextList::Dump(Stream *s, Target *target) const {
*s << this << ": ";
s->Indent();
s->PutCString("SymbolContextList");
s->EOL();
s->IndentMore();
collection::const_iterator pos, end = m_symbol_contexts.end();
for (pos = m_symbol_contexts.begin(); pos != end; ++pos) {
// pos->Dump(s, target);
pos->GetDescription(s, eDescriptionLevelVerbose, target);
}
s->IndentLess();
}
bool SymbolContextList::GetContextAtIndex(size_t idx, SymbolContext &sc) const {
if (idx < m_symbol_contexts.size()) {
sc = m_symbol_contexts[idx];
return true;
}
return false;
}
bool SymbolContextList::RemoveContextAtIndex(size_t idx) {
if (idx < m_symbol_contexts.size()) {
m_symbol_contexts.erase(m_symbol_contexts.begin() + idx);
return true;
}
return false;
}
uint32_t SymbolContextList::GetSize() const { return m_symbol_contexts.size(); }
uint32_t SymbolContextList::NumLineEntriesWithLine(uint32_t line) const {
uint32_t match_count = 0;
const size_t size = m_symbol_contexts.size();
for (size_t idx = 0; idx < size; ++idx) {
if (m_symbol_contexts[idx].line_entry.line == line)
++match_count;
}
return match_count;
}
void SymbolContextList::GetDescription(Stream *s, lldb::DescriptionLevel level,
Target *target) const {
const size_t size = m_symbol_contexts.size();
for (size_t idx = 0; idx < size; ++idx)
m_symbol_contexts[idx].GetDescription(s, level, target);
}
bool lldb_private::operator==(const SymbolContextList &lhs,
const SymbolContextList &rhs) {
const uint32_t size = lhs.GetSize();
if (size != rhs.GetSize())
return false;
SymbolContext lhs_sc;
SymbolContext rhs_sc;
for (uint32_t i = 0; i < size; ++i) {
lhs.GetContextAtIndex(i, lhs_sc);
rhs.GetContextAtIndex(i, rhs_sc);
if (lhs_sc != rhs_sc)
return false;
}
return true;
}
bool lldb_private::operator!=(const SymbolContextList &lhs,
const SymbolContextList &rhs) {
return !(lhs == rhs);
}
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