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//===-- SymbolVendorMacOSX.cpp ----------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "SymbolVendorMacOSX.h"
#include <AvailabilityMacros.h>
#include "lldb/Core/Module.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/Section.h"
#include "lldb/Core/Timer.h"
#include "lldb/Host/Symbols.h"
#include "lldb/Symbol/ObjectFile.h"
using namespace lldb;
using namespace lldb_private;
//----------------------------------------------------------------------
// SymbolVendorMacOSX constructor
//----------------------------------------------------------------------
SymbolVendorMacOSX::SymbolVendorMacOSX(const lldb::ModuleSP &module_sp) :
SymbolVendor (module_sp)
{
}
//----------------------------------------------------------------------
// Destructor
//----------------------------------------------------------------------
SymbolVendorMacOSX::~SymbolVendorMacOSX()
{
}
static bool
UUIDsMatch(Module *module, ObjectFile *ofile)
{
if (module && ofile)
{
// Make sure the UUIDs match
lldb_private::UUID dsym_uuid;
if (ofile->GetUUID(&dsym_uuid))
return dsym_uuid == module->GetUUID();
}
return false;
}
static void
ReplaceDSYMSectionsWithExecutableSections (ObjectFile *exec_objfile, ObjectFile *dsym_objfile)
{
// We need both the executable and the dSYM to live off of the
// same section lists. So we take all of the sections from the
// executable, and replace them in the dSYM. This allows section
// offset addresses that come from the dSYM to automatically
// get updated as images (shared libraries) get loaded and
// unloaded.
SectionList *exec_section_list = exec_objfile->GetSectionList();
SectionList *dsym_section_list = dsym_objfile->GetSectionList();
if (exec_section_list && dsym_section_list)
{
const uint32_t num_exec_sections = dsym_section_list->GetSize();
uint32_t exec_sect_idx;
for (exec_sect_idx = 0; exec_sect_idx < num_exec_sections; ++exec_sect_idx)
{
SectionSP exec_sect_sp(exec_section_list->GetSectionAtIndex(exec_sect_idx));
if (exec_sect_sp.get())
{
// Try and replace any sections that exist in both the executable
// and in the dSYM with those from the executable. If we fail to
// replace the one in the dSYM, then add the executable section to
// the dSYM.
if (dsym_section_list->ReplaceSection(exec_sect_sp->GetID(), exec_sect_sp, 0) == false)
dsym_section_list->AddSection(exec_sect_sp);
}
}
dsym_section_list->Finalize(); // Now that we're done adding sections, finalize to build fast-lookup caches
}
}
void
SymbolVendorMacOSX::Initialize()
{
PluginManager::RegisterPlugin (GetPluginNameStatic(),
GetPluginDescriptionStatic(),
CreateInstance);
}
void
SymbolVendorMacOSX::Terminate()
{
PluginManager::UnregisterPlugin (CreateInstance);
}
const char *
SymbolVendorMacOSX::GetPluginNameStatic()
{
return "symbol-vendor.macosx";
}
const char *
SymbolVendorMacOSX::GetPluginDescriptionStatic()
{
return "Symbol vendor for MacOSX that looks for dSYM files that match executables.";
}
//----------------------------------------------------------------------
// CreateInstance
//
// Platforms can register a callback to use when creating symbol
// vendors to allow for complex debug information file setups, and to
// also allow for finding separate debug information files.
//----------------------------------------------------------------------
SymbolVendor*
SymbolVendorMacOSX::CreateInstance (const lldb::ModuleSP &module_sp)
{
if (!module_sp)
return NULL;
Timer scoped_timer (__PRETTY_FUNCTION__,
"SymbolVendorMacOSX::CreateInstance (module = %s/%s)",
module_sp->GetFileSpec().GetDirectory().AsCString(),
module_sp->GetFileSpec().GetFilename().AsCString());
SymbolVendorMacOSX* symbol_vendor = new SymbolVendorMacOSX(module_sp);
if (symbol_vendor)
{
char path[PATH_MAX];
path[0] = '\0';
// Try and locate the dSYM file on Mac OS X
ObjectFile * obj_file = module_sp->GetObjectFile();
if (obj_file)
{
Timer scoped_timer2 ("SymbolVendorMacOSX::CreateInstance () locate dSYM",
"SymbolVendorMacOSX::CreateInstance (module = %s/%s) locate dSYM",
module_sp->GetFileSpec().GetDirectory().AsCString(),
module_sp->GetFileSpec().GetFilename().AsCString());
// First check to see if the module has a symbol file in mind already.
// If it does, then we MUST use that.
FileSpec dsym_fspec (module_sp->GetSymbolFileFileSpec());
ObjectFileSP dsym_objfile_sp;
if (!dsym_fspec)
{
// No symbol file was specified in the module, lets try and find
// one ourselves.
const FileSpec &file_spec = obj_file->GetFileSpec();
if (file_spec)
{
ModuleSpec module_spec(file_spec, module_sp->GetArchitecture());
module_spec.GetUUID() = module_sp->GetUUID();
dsym_fspec = Symbols::LocateExecutableSymbolFile (module_spec);
if (module_spec.GetSourceMappingList().GetSize())
{
module_sp->GetSourceMappingList().Append (module_spec.GetSourceMappingList (), true);
}
}
}
if (dsym_fspec)
{
DataBufferSP dsym_file_data_sp;
dsym_objfile_sp = ObjectFile::FindPlugin(module_sp, &dsym_fspec, 0, dsym_fspec.GetByteSize(), dsym_file_data_sp);
if (UUIDsMatch(module_sp.get(), dsym_objfile_sp.get()))
{
ReplaceDSYMSectionsWithExecutableSections (obj_file, dsym_objfile_sp.get());
symbol_vendor->AddSymbolFileRepresentation(dsym_objfile_sp);
return symbol_vendor;
}
}
// Just create our symbol vendor using the current objfile as this is either
// an executable with no dSYM (that we could locate), an executable with
// a dSYM that has a UUID that doesn't match.
symbol_vendor->AddSymbolFileRepresentation(obj_file->shared_from_this());
}
}
return symbol_vendor;
}
//------------------------------------------------------------------
// PluginInterface protocol
//------------------------------------------------------------------
const char *
SymbolVendorMacOSX::GetPluginName()
{
return "SymbolVendorMacOSX";
}
const char *
SymbolVendorMacOSX::GetShortPluginName()
{
return GetPluginNameStatic();
}
uint32_t
SymbolVendorMacOSX::GetPluginVersion()
{
return 1;
}
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