maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/lldb/source/Symbol/Function.cpp

607 lines
16 KiB
C++
Raw Blame History

//===-- Function.cpp --------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Symbol/Function.h"
#include "lldb/Core/Disassembler.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/Section.h"
#include "lldb/Host/Host.h"
#include "lldb/Symbol/ClangASTType.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/LineTable.h"
#include "lldb/Symbol/SymbolFile.h"
#include "lldb/Symbol/SymbolVendor.h"
#include "llvm/Support/Casting.h"
using namespace lldb;
using namespace lldb_private;
//----------------------------------------------------------------------
// Basic function information is contained in the FunctionInfo class.
// It is designed to contain the name, linkage name, and declaration
// location.
//----------------------------------------------------------------------
FunctionInfo::FunctionInfo (const char *name, const Declaration *decl_ptr) :
m_name(name),
m_declaration(decl_ptr)
{
}
FunctionInfo::FunctionInfo (const ConstString& name, const Declaration *decl_ptr) :
m_name(name),
m_declaration(decl_ptr)
{
}
FunctionInfo::~FunctionInfo()
{
}
void
FunctionInfo::Dump(Stream *s, bool show_fullpaths) const
{
if (m_name)
*s << ", name = \"" << m_name << "\"";
m_declaration.Dump(s, show_fullpaths);
}
int
FunctionInfo::Compare(const FunctionInfo& a, const FunctionInfo& b)
{
int result = ConstString::Compare(a.GetName(), b.GetName());
if (result)
return result;
return Declaration::Compare(a.m_declaration, b.m_declaration);
}
Declaration&
FunctionInfo::GetDeclaration()
{
return m_declaration;
}
const Declaration&
FunctionInfo::GetDeclaration() const
{
return m_declaration;
}
const ConstString&
FunctionInfo::GetName() const
{
return m_name;
}
size_t
FunctionInfo::MemorySize() const
{
return m_name.MemorySize() + m_declaration.MemorySize();
}
InlineFunctionInfo::InlineFunctionInfo
(
const char *name,
const char *mangled,
const Declaration *decl_ptr,
const Declaration *call_decl_ptr
) :
FunctionInfo(name, decl_ptr),
m_mangled(ConstString(mangled), true),
m_call_decl (call_decl_ptr)
{
}
InlineFunctionInfo::InlineFunctionInfo
(
const ConstString& name,
const Mangled &mangled,
const Declaration *decl_ptr,
const Declaration *call_decl_ptr
) :
FunctionInfo(name, decl_ptr),
m_mangled(mangled),
m_call_decl (call_decl_ptr)
{
}
InlineFunctionInfo::~InlineFunctionInfo()
{
}
int
InlineFunctionInfo::Compare(const InlineFunctionInfo& a, const InlineFunctionInfo& b)
{
int result = FunctionInfo::Compare(a, b);
if (result)
return result;
// only compare the mangled names if both have them
return Mangled::Compare(a.m_mangled, a.m_mangled);
}
void
InlineFunctionInfo::Dump(Stream *s, bool show_fullpaths) const
{
FunctionInfo::Dump(s, show_fullpaths);
if (m_mangled)
m_mangled.Dump(s);
}
void
InlineFunctionInfo::DumpStopContext (Stream *s) const
{
// s->Indent("[inlined] ");
s->Indent();
if (m_mangled)
s->PutCString (m_mangled.GetName().AsCString());
else
s->PutCString (m_name.AsCString());
}
const ConstString &
InlineFunctionInfo::GetName () const
{
if (m_mangled)
return m_mangled.GetName();
return m_name;
}
Declaration &
InlineFunctionInfo::GetCallSite ()
{
return m_call_decl;
}
const Declaration &
InlineFunctionInfo::GetCallSite () const
{
return m_call_decl;
}
Mangled&
InlineFunctionInfo::GetMangled()
{
return m_mangled;
}
const Mangled&
InlineFunctionInfo::GetMangled() const
{
return m_mangled;
}
size_t
InlineFunctionInfo::MemorySize() const
{
return FunctionInfo::MemorySize() + m_mangled.MemorySize();
}
//----------------------------------------------------------------------
//
//----------------------------------------------------------------------
Function::Function
(
CompileUnit *comp_unit,
lldb::user_id_t func_uid,
lldb::user_id_t type_uid,
const Mangled &mangled,
Type * type,
const AddressRange& range
) :
UserID (func_uid),
m_comp_unit (comp_unit),
m_type_uid (type_uid),
m_type (type),
m_mangled (mangled),
m_block (func_uid),
m_range (range),
m_frame_base (),
m_flags (),
m_prologue_byte_size (0)
{
m_block.SetParentScope(this);
assert(comp_unit != nullptr);
}
Function::Function
(
CompileUnit *comp_unit,
lldb::user_id_t func_uid,
lldb::user_id_t type_uid,
const char *mangled,
Type *type,
const AddressRange &range
) :
UserID (func_uid),
m_comp_unit (comp_unit),
m_type_uid (type_uid),
m_type (type),
m_mangled (ConstString(mangled), true),
m_block (func_uid),
m_range (range),
m_frame_base (),
m_flags (),
m_prologue_byte_size (0)
{
m_block.SetParentScope(this);
assert(comp_unit != nullptr);
}
Function::~Function()
{
}
void
Function::GetStartLineSourceInfo (FileSpec &source_file, uint32_t &line_no)
{
line_no = 0;
source_file.Clear();
if (m_comp_unit == nullptr)
return;
if (m_type != nullptr && m_type->GetDeclaration().GetLine() != 0)
{
source_file = m_type->GetDeclaration().GetFile();
line_no = m_type->GetDeclaration().GetLine();
}
else
{
LineTable *line_table = m_comp_unit->GetLineTable();
if (line_table == nullptr)
return;
LineEntry line_entry;
if (line_table->FindLineEntryByAddress (GetAddressRange().GetBaseAddress(), line_entry, nullptr))
{
line_no = line_entry.line;
source_file = line_entry.file;
}
}
}
void
Function::GetEndLineSourceInfo (FileSpec &source_file, uint32_t &line_no)
{
line_no = 0;
source_file.Clear();
// The -1 is kind of cheesy, but I want to get the last line entry for the given function, not the
// first entry of the next.
Address scratch_addr(GetAddressRange().GetBaseAddress());
scratch_addr.SetOffset (scratch_addr.GetOffset() + GetAddressRange().GetByteSize() - 1);
LineTable *line_table = m_comp_unit->GetLineTable();
if (line_table == nullptr)
return;
LineEntry line_entry;
if (line_table->FindLineEntryByAddress (scratch_addr, line_entry, nullptr))
{
line_no = line_entry.line;
source_file = line_entry.file;
}
}
Block &
Function::GetBlock (bool can_create)
{
if (!m_block.BlockInfoHasBeenParsed() && can_create)
{
SymbolContext sc;
CalculateSymbolContext(&sc);
if (sc.module_sp)
{
sc.module_sp->GetSymbolVendor()->ParseFunctionBlocks(sc);
}
else
{
Host::SystemLog (Host::eSystemLogError,
"error: unable to find module shared pointer for function '%s' in %s\n",
GetName().GetCString(),
m_comp_unit->GetPath().c_str());
}
m_block.SetBlockInfoHasBeenParsed (true, true);
}
return m_block;
}
CompileUnit*
Function::GetCompileUnit()
{
return m_comp_unit;
}
const CompileUnit*
Function::GetCompileUnit() const
{
return m_comp_unit;
}
void
Function::GetDescription(Stream *s, lldb::DescriptionLevel level, Target *target)
{
Type* func_type = GetType();
const char *name = func_type ? func_type->GetName().AsCString() : "<unknown>";
*s << "id = " << (const UserID&)*this << ", name = \"" << name << "\", range = ";
Address::DumpStyle fallback_style;
if (level == eDescriptionLevelVerbose)
fallback_style = Address::DumpStyleModuleWithFileAddress;
else
fallback_style = Address::DumpStyleFileAddress;
GetAddressRange().Dump(s, target, Address::DumpStyleLoadAddress, fallback_style);
}
void
Function::Dump(Stream *s, bool show_context) const
{
s->Printf("%p: ", static_cast<const void*>(this));
s->Indent();
*s << "Function" << static_cast<const UserID&>(*this);
m_mangled.Dump(s);
if (m_type)
s->Printf(", type = %p", static_cast<void*>(m_type));
else if (m_type_uid != LLDB_INVALID_UID)
s->Printf(", type_uid = 0x%8.8" PRIx64, m_type_uid);
s->EOL();
// Dump the root object
if (m_block.BlockInfoHasBeenParsed ())
m_block.Dump(s, m_range.GetBaseAddress().GetFileAddress(), INT_MAX, show_context);
}
void
Function::CalculateSymbolContext(SymbolContext* sc)
{
sc->function = this;
m_comp_unit->CalculateSymbolContext(sc);
}
ModuleSP
Function::CalculateSymbolContextModule ()
{
SectionSP section_sp (m_range.GetBaseAddress().GetSection());
if (section_sp)
return section_sp->GetModule();
return this->GetCompileUnit()->GetModule();
}
CompileUnit *
Function::CalculateSymbolContextCompileUnit ()
{
return this->GetCompileUnit();
}
Function *
Function::CalculateSymbolContextFunction ()
{
return this;
}
lldb::DisassemblerSP
Function::GetInstructions (const ExecutionContext &exe_ctx,
const char *flavor,
bool prefer_file_cache)
{
ModuleSP module_sp (GetAddressRange().GetBaseAddress().GetModule());
if (module_sp)
{
const bool prefer_file_cache = false;
return Disassembler::DisassembleRange (module_sp->GetArchitecture(),
nullptr,
flavor,
exe_ctx,
GetAddressRange(),
prefer_file_cache);
}
return lldb::DisassemblerSP();
}
bool
Function::GetDisassembly (const ExecutionContext &exe_ctx,
const char *flavor,
bool prefer_file_cache,
Stream &strm)
{
lldb::DisassemblerSP disassembler_sp = GetInstructions (exe_ctx, flavor, prefer_file_cache);
if (disassembler_sp)
{
const bool show_address = true;
const bool show_bytes = false;
disassembler_sp->GetInstructionList().Dump (&strm, show_address, show_bytes, &exe_ctx);
return true;
}
return false;
}
//Symbol *
//Function::CalculateSymbolContextSymbol ()
//{
// return // TODO: find the symbol for the function???
//}
void
Function::DumpSymbolContext(Stream *s)
{
m_comp_unit->DumpSymbolContext(s);
s->Printf(", Function{0x%8.8" PRIx64 "}", GetID());
}
size_t
Function::MemorySize () const
{
size_t mem_size = sizeof(Function) + m_block.MemorySize();
return mem_size;
}
clang::DeclContext *
Function::GetClangDeclContext()
{
SymbolContext sc;
CalculateSymbolContext (&sc);
if (!sc.module_sp)
return nullptr;
SymbolVendor *sym_vendor = sc.module_sp->GetSymbolVendor();
if (!sym_vendor)
return nullptr;
SymbolFile *sym_file = sym_vendor->GetSymbolFile();
if (!sym_file)
return nullptr;
return sym_file->GetClangDeclContextForTypeUID (sc, m_uid);
}
Type*
Function::GetType()
{
if (m_type == nullptr)
{
SymbolContext sc;
CalculateSymbolContext (&sc);
if (!sc.module_sp)
return nullptr;
SymbolVendor *sym_vendor = sc.module_sp->GetSymbolVendor();
if (sym_vendor == nullptr)
return nullptr;
SymbolFile *sym_file = sym_vendor->GetSymbolFile();
if (sym_file == nullptr)
return nullptr;
m_type = sym_file->ResolveTypeUID(m_type_uid);
}
return m_type;
}
const Type*
Function::GetType() const
{
return m_type;
}
ClangASTType
Function::GetClangType()
{
Type *function_type = GetType();
if (function_type)
return function_type->GetClangFullType();
return ClangASTType();
}
uint32_t
Function::GetPrologueByteSize ()
{
if (m_prologue_byte_size == 0 && m_flags.IsClear(flagsCalculatedPrologueSize))
{
m_flags.Set(flagsCalculatedPrologueSize);
LineTable* line_table = m_comp_unit->GetLineTable ();
if (line_table)
{
LineEntry first_line_entry;
uint32_t first_line_entry_idx = UINT32_MAX;
if (line_table->FindLineEntryByAddress(GetAddressRange().GetBaseAddress(), first_line_entry, &first_line_entry_idx))
{
// Make sure the first line entry isn't already the end of the prologue
addr_t prologue_end_file_addr = LLDB_INVALID_ADDRESS;
if (first_line_entry.is_prologue_end)
{
prologue_end_file_addr = first_line_entry.range.GetBaseAddress().GetFileAddress();
}
else
{
// Check the first few instructions and look for one that has
// is_prologue_end set to true.
const uint32_t last_line_entry_idx = first_line_entry_idx + 6;
for (uint32_t idx = first_line_entry_idx + 1; idx < last_line_entry_idx; ++idx)
{
LineEntry line_entry;
if (line_table->GetLineEntryAtIndex (idx, line_entry))
{
if (line_entry.is_prologue_end)
{
prologue_end_file_addr = line_entry.range.GetBaseAddress().GetFileAddress();
break;
}
}
}
}
// If we didn't find the end of the prologue in the line tables,
// then just use the end address of the first line table entry
if (prologue_end_file_addr == LLDB_INVALID_ADDRESS)
{
// Check the first few instructions and look for one that has
// a line number that's different than the first entry.
const uint32_t last_line_entry_idx = first_line_entry_idx + 6;
for (uint32_t idx = first_line_entry_idx + 1; idx < last_line_entry_idx; ++idx)
{
LineEntry line_entry;
if (line_table->GetLineEntryAtIndex (idx, line_entry))
{
if (line_entry.line != first_line_entry.line)
{
prologue_end_file_addr = line_entry.range.GetBaseAddress().GetFileAddress();
break;
}
}
}
if (prologue_end_file_addr == LLDB_INVALID_ADDRESS)
{
prologue_end_file_addr = first_line_entry.range.GetBaseAddress().GetFileAddress() + first_line_entry.range.GetByteSize();
}
}
const addr_t func_start_file_addr = m_range.GetBaseAddress().GetFileAddress();
const addr_t func_end_file_addr = func_start_file_addr + m_range.GetByteSize();
// Verify that this prologue end file address in the function's
// address range just to be sure
if (func_start_file_addr < prologue_end_file_addr && prologue_end_file_addr < func_end_file_addr)
{
m_prologue_byte_size = prologue_end_file_addr - func_start_file_addr;
}
}
}
}
return m_prologue_byte_size;
}
Reference in New Issue View Git Blame Copy Permalink