8b82f087a0
the CommandInterpreter where it was always being used. Make sure that Modules can track their object file offsets correctly to allow opening of sub object files (like the "__commpage" on darwin). Modified the Platforms to be able to launch processes. The first part of this move is the platform soon will become the entity that launches your program and when it does, it uses a new ProcessLaunchInfo class which encapsulates all process launching settings. This simplifies the internal APIs needed for launching. I want to slowly phase out process launching from the process classes, so for now we can still launch just as we used to, but eventually the platform is the object that should do the launching. Modified the Host::LaunchProcess in the MacOSX Host.mm to correctly be able to launch processes with all of the new eLaunchFlag settings. Modified any code that was manually launching processes to use the Host::LaunchProcess functions. Fixed an issue where lldb_private::Args had implicitly defined copy constructors that could do the wrong thing. This has now been fixed by adding an appropriate copy constructor and assignment operator. Make sure we don't add empty ModuleSP entries to a module list. Fixed the commpage module creation on MacOSX, but we still need to train the MacOSX dynamic loader to not get rid of it when it doesn't have an entry in the all image infos. Abstracted many more calls from in ProcessGDBRemote down into the GDBRemoteCommunicationClient subclass to make the classes cleaner and more efficient. Fixed the default iOS ARM register context to be correct and also added support for targets that don't support the qThreadStopInfo packet by selecting the current thread (only if needed) and then sending a stop reply packet. Debugserver can now start up with a --unix-socket (-u for short) and can then bind to port zero and send the port it bound to to a listening process on the other end. This allows the GDB remote platform to spawn new GDB server instances (debugserver) to allow platform debugging. llvm-svn: 129351
473 lines
18 KiB
C++
473 lines
18 KiB
C++
//===-- Symbols.cpp ---------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Host/Symbols.h"
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// C Includes
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#include <dirent.h>
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#include "llvm/Support/MachO.h"
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// C++ Includes
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// Other libraries and framework includes
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#include <CoreFoundation/CoreFoundation.h>
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// Project includes
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#include "lldb/Core/ArchSpec.h"
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#include "lldb/Core/DataBuffer.h"
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#include "lldb/Core/DataExtractor.h"
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#include "lldb/Core/Timer.h"
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#include "lldb/Core/UUID.h"
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#include "lldb/Host/Endian.h"
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#include "lldb/Utility/CleanUp.h"
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#include "Host/macosx/cfcpp/CFCReleaser.h"
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#include "Host/macosx/cfcpp/CFCString.h"
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#include "mach/machine.h"
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using namespace lldb;
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using namespace lldb_private;
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using namespace llvm::MachO;
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extern "C" {
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CFURLRef DBGCopyFullDSYMURLForUUID (CFUUIDRef uuid, CFURLRef exec_url);
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CFDictionaryRef DBGCopyDSYMPropertyLists (CFURLRef dsym_url);
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}
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static bool
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SkinnyMachOFileContainsArchAndUUID
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(
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const FileSpec &file_spec,
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const ArchSpec *arch,
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const lldb_private::UUID *uuid, // the UUID we are looking for
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off_t file_offset,
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DataExtractor& data,
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uint32_t data_offset,
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const uint32_t magic
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)
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{
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assert(magic == HeaderMagic32 || magic == HeaderMagic32Swapped || magic == HeaderMagic64 || magic == HeaderMagic64Swapped);
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if (magic == HeaderMagic32 || magic == HeaderMagic64)
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data.SetByteOrder (lldb::endian::InlHostByteOrder());
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else if (lldb::endian::InlHostByteOrder() == eByteOrderBig)
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data.SetByteOrder (eByteOrderLittle);
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else
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data.SetByteOrder (eByteOrderBig);
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uint32_t i;
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const uint32_t cputype = data.GetU32(&data_offset); // cpu specifier
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const uint32_t cpusubtype = data.GetU32(&data_offset); // machine specifier
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data_offset+=4; // Skip mach file type
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const uint32_t ncmds = data.GetU32(&data_offset); // number of load commands
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const uint32_t sizeofcmds = data.GetU32(&data_offset); // the size of all the load commands
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data_offset+=4; // Skip flags
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// Check the architecture if we have a valid arch pointer
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if (arch)
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{
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ArchSpec file_arch(eArchTypeMachO, cputype, cpusubtype);
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if (file_arch != *arch)
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return false;
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}
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// The file exists, and if a valid arch pointer was passed in we know
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// if already matches, so we can return if we aren't looking for a specific
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// UUID
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if (uuid == NULL)
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return true;
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if (magic == HeaderMagic64Swapped || magic == HeaderMagic64)
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data_offset += 4; // Skip reserved field for in mach_header_64
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// Make sure we have enough data for all the load commands
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if (magic == HeaderMagic64Swapped || magic == HeaderMagic64)
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{
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if (data.GetByteSize() < sizeof(struct mach_header_64) + sizeofcmds)
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{
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DataBufferSP data_buffer_sp (file_spec.ReadFileContents (file_offset, sizeof(struct mach_header_64) + sizeofcmds));
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data.SetData (data_buffer_sp);
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}
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}
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else
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{
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if (data.GetByteSize() < sizeof(struct mach_header) + sizeofcmds)
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{
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DataBufferSP data_buffer_sp (file_spec.ReadFileContents (file_offset, sizeof(struct mach_header) + sizeofcmds));
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data.SetData (data_buffer_sp);
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}
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}
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for (i=0; i<ncmds; i++)
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{
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const uint32_t cmd_offset = data_offset; // Save this data_offset in case parsing of the segment goes awry!
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uint32_t cmd = data.GetU32(&data_offset);
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uint32_t cmd_size = data.GetU32(&data_offset);
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if (cmd == LoadCommandUUID)
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{
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lldb_private::UUID file_uuid (data.GetData(&data_offset, 16), 16);
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return file_uuid == *uuid;
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}
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data_offset = cmd_offset + cmd_size;
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}
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return false;
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}
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bool
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UniversalMachOFileContainsArchAndUUID
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(
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const FileSpec &file_spec,
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const ArchSpec *arch,
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const lldb_private::UUID *uuid,
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off_t file_offset,
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DataExtractor& data,
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uint32_t data_offset,
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const uint32_t magic
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)
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{
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assert(magic == UniversalMagic || magic == UniversalMagicSwapped);
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// Universal mach-o files always have their headers encoded as BIG endian
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data.SetByteOrder(eByteOrderBig);
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uint32_t i;
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const uint32_t nfat_arch = data.GetU32(&data_offset); // number of structs that follow
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const uint32_t fat_header_and_arch_size = sizeof(struct fat_header) + nfat_arch * sizeof(struct fat_arch);
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if (data.GetByteSize() < fat_header_and_arch_size)
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{
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DataBufferSP data_buffer_sp (file_spec.ReadFileContents (file_offset, fat_header_and_arch_size));
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data.SetData (data_buffer_sp);
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}
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for (i=0; i<nfat_arch; i++)
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{
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cpu_type_t arch_cputype = data.GetU32(&data_offset); // cpu specifier (int)
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cpu_subtype_t arch_cpusubtype = data.GetU32(&data_offset); // machine specifier (int)
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uint32_t arch_offset = data.GetU32(&data_offset); // file offset to this object file
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// uint32_t arch_size = data.GetU32(&data_offset); // size of this object file
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// uint32_t arch_align = data.GetU32(&data_offset); // alignment as a power of 2
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data_offset += 8; // Skip size and align as we don't need those
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// Only process this slice if the cpu type/subtype matches
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if (arch)
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{
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ArchSpec fat_arch(eArchTypeMachO, arch_cputype, arch_cpusubtype);
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if (fat_arch != *arch)
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continue;
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}
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// Create a buffer with only the arch slice date in it
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DataExtractor arch_data;
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DataBufferSP data_buffer_sp (file_spec.ReadFileContents (file_offset + arch_offset, 0x1000));
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arch_data.SetData(data_buffer_sp);
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uint32_t arch_data_offset = 0;
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uint32_t arch_magic = arch_data.GetU32(&arch_data_offset);
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switch (arch_magic)
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{
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case HeaderMagic32:
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case HeaderMagic32Swapped:
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case HeaderMagic64:
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case HeaderMagic64Swapped:
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if (SkinnyMachOFileContainsArchAndUUID (file_spec, arch, uuid, file_offset + arch_offset, arch_data, arch_data_offset, arch_magic))
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return true;
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break;
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}
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}
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return false;
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}
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static bool
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FileAtPathContainsArchAndUUID
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(
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const FileSpec &file_spec,
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const ArchSpec *arch,
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const lldb_private::UUID *uuid
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)
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{
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DataExtractor data;
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off_t file_offset = 0;
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DataBufferSP data_buffer_sp (file_spec.ReadFileContents (file_offset, 0x1000));
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if (data_buffer_sp && data_buffer_sp->GetByteSize() > 0)
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{
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data.SetData(data_buffer_sp);
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uint32_t data_offset = 0;
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uint32_t magic = data.GetU32(&data_offset);
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switch (magic)
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{
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// 32 bit mach-o file
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case HeaderMagic32:
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case HeaderMagic32Swapped:
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case HeaderMagic64:
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case HeaderMagic64Swapped:
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return SkinnyMachOFileContainsArchAndUUID (file_spec, arch, uuid, file_offset, data, data_offset, magic);
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// fat mach-o file
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case UniversalMagic:
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case UniversalMagicSwapped:
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return UniversalMachOFileContainsArchAndUUID (file_spec, arch, uuid, file_offset, data, data_offset, magic);
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default:
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break;
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}
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}
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return false;
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}
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static FileSpec
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LocateDSYMMachFileInDSYMBundle
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(
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const FileSpec& dsym_bundle_fspec,
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const lldb_private::UUID *uuid,
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const ArchSpec *arch)
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{
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char path[PATH_MAX];
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FileSpec dsym_fspec;
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if (dsym_bundle_fspec.GetPath(path, sizeof(path)))
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{
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::strncat (path, "/Contents/Resources/DWARF", sizeof(path) - strlen(path) - 1);
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lldb_utility::CleanUp <DIR *, int> dirp (opendir(path), NULL, closedir);
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if (dirp.is_valid())
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{
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dsym_fspec.GetDirectory().SetCString(path);
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struct dirent* dp;
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while ((dp = readdir(dirp.get())) != NULL)
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{
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// Only search directories
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if (dp->d_type == DT_DIR || dp->d_type == DT_UNKNOWN)
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{
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if (dp->d_namlen == 1 && dp->d_name[0] == '.')
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continue;
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if (dp->d_namlen == 2 && dp->d_name[0] == '.' && dp->d_name[1] == '.')
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continue;
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}
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if (dp->d_type == DT_REG || dp->d_type == DT_UNKNOWN)
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{
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dsym_fspec.GetFilename().SetCString(dp->d_name);
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if (FileAtPathContainsArchAndUUID (dsym_fspec, arch, uuid))
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return dsym_fspec;
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}
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}
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}
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}
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dsym_fspec.Clear();
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return dsym_fspec;
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}
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static int
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LocateMacOSXFilesUsingDebugSymbols
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(
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const FileSpec *exec_fspec, // An executable path that may or may not be correct if UUID is specified
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const ArchSpec* arch, // Limit the search to files with this architecture if non-NULL
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const lldb_private::UUID *uuid, // Match the UUID value if non-NULL,
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FileSpec *out_exec_fspec, // If non-NULL, try and find the executable
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FileSpec *out_dsym_fspec // If non-NULL try and find the debug symbol file
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)
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{
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int items_found = 0;
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if (out_exec_fspec)
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out_exec_fspec->Clear();
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if (out_dsym_fspec)
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out_dsym_fspec->Clear();
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if (uuid && uuid->IsValid())
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{
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// Try and locate the dSYM file using DebugSymbols first
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const UInt8 *module_uuid = (const UInt8 *)uuid->GetBytes();
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if (module_uuid != NULL)
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{
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CFCReleaser<CFUUIDRef> module_uuid_ref(::CFUUIDCreateWithBytes ( NULL,
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module_uuid[0],
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module_uuid[1],
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module_uuid[2],
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module_uuid[3],
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module_uuid[4],
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module_uuid[5],
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module_uuid[6],
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module_uuid[7],
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module_uuid[8],
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module_uuid[9],
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module_uuid[10],
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module_uuid[11],
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module_uuid[12],
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module_uuid[13],
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module_uuid[14],
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module_uuid[15]));
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if (module_uuid_ref.get())
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{
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CFCReleaser<CFURLRef> exec_url;
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if (exec_fspec)
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{
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char exec_cf_path[PATH_MAX];
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if (exec_fspec->GetPath(exec_cf_path, sizeof(exec_cf_path)))
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exec_url.reset(::CFURLCreateFromFileSystemRepresentation (NULL,
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(const UInt8 *)exec_cf_path,
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strlen(exec_cf_path),
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FALSE));
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}
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CFCReleaser<CFURLRef> dsym_url (::DBGCopyFullDSYMURLForUUID(module_uuid_ref.get(), exec_url.get()));
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char path[PATH_MAX];
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if (dsym_url.get())
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{
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if (out_dsym_fspec)
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{
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if (::CFURLGetFileSystemRepresentation (dsym_url.get(), true, (UInt8*)path, sizeof(path)-1))
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{
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out_dsym_fspec->SetFile(path, false);
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if (out_dsym_fspec->GetFileType () == FileSpec::eFileTypeDirectory)
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{
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*out_dsym_fspec = LocateDSYMMachFileInDSYMBundle (*out_dsym_fspec, uuid, arch);
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if (*out_dsym_fspec)
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++items_found;
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}
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else
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{
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++items_found;
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}
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}
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}
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if (out_exec_fspec)
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{
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CFCReleaser<CFDictionaryRef> dict(::DBGCopyDSYMPropertyLists (dsym_url.get()));;
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if (dict.get())
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{
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char uuid_cstr_buf[64];
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const char *uuid_cstr = uuid->GetAsCString (uuid_cstr_buf, sizeof(uuid_cstr_buf));
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CFCString uuid_cfstr (uuid_cstr);
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CFDictionaryRef uuid_dict = static_cast<CFDictionaryRef>(::CFDictionaryGetValue (dict.get(), uuid_cfstr.get()));
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if (uuid_dict)
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{
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CFStringRef exec_cf_path = static_cast<CFStringRef>(::CFDictionaryGetValue (uuid_dict, CFSTR("DBGSymbolRichExecutable")));
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if (exec_cf_path && ::CFStringGetFileSystemRepresentation (exec_cf_path, path, sizeof(path)))
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{
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++items_found;
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out_exec_fspec->SetFile(path, path[0] == '~');
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}
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}
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}
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}
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}
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}
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}
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}
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return items_found;
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}
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static bool
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LocateDSYMInVincinityOfExecutable (const FileSpec *exec_fspec, const ArchSpec* arch, const lldb_private::UUID *uuid, FileSpec &dsym_fspec)
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{
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if (exec_fspec)
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{
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char path[PATH_MAX];
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if (exec_fspec->GetPath(path, sizeof(path)))
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{
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// Make sure the module isn't already just a dSYM file...
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if (strcasestr(path, ".dSYM/Contents/Resources/DWARF") == NULL)
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{
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size_t obj_file_path_length = strlen(path);
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strncat(path, ".dSYM/Contents/Resources/DWARF/", sizeof(path));
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strncat(path, exec_fspec->GetFilename().AsCString(), sizeof(path));
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dsym_fspec.SetFile(path, false);
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if (FileAtPathContainsArchAndUUID (dsym_fspec, arch, uuid))
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{
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return true;
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}
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else
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{
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path[obj_file_path_length] = '\0';
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char *last_dot = strrchr(path, '.');
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while (last_dot != NULL && last_dot[0])
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{
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char *next_slash = strchr(last_dot, '/');
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if (next_slash != NULL)
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{
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*next_slash = '\0';
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strncat(path, ".dSYM/Contents/Resources/DWARF/", sizeof(path));
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strncat(path, exec_fspec->GetFilename().AsCString(), sizeof(path));
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dsym_fspec.SetFile(path, false);
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if (dsym_fspec.Exists())
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return true;
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else
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{
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*last_dot = '\0';
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char *prev_slash = strrchr(path, '/');
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if (prev_slash != NULL)
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*prev_slash = '\0';
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else
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break;
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}
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}
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else
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{
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break;
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}
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}
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}
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}
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}
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}
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dsym_fspec.Clear();
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return false;
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}
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FileSpec
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Symbols::LocateExecutableObjectFile (const FileSpec *exec_fspec, const ArchSpec* arch, const lldb_private::UUID *uuid)
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{
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Timer scoped_timer (__PRETTY_FUNCTION__,
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"LocateExecutableObjectFile (file = %s, arch = %s, uuid = %p)",
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exec_fspec ? exec_fspec->GetFilename().AsCString ("<NULL>") : "<NULL>",
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arch ? arch->GetArchitectureName() : "<NULL>",
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uuid);
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FileSpec objfile_fspec;
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if (exec_fspec && FileAtPathContainsArchAndUUID (*exec_fspec, arch, uuid))
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objfile_fspec = *exec_fspec;
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else
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LocateMacOSXFilesUsingDebugSymbols (exec_fspec, arch, uuid, &objfile_fspec, NULL);
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return objfile_fspec;
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}
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FileSpec
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Symbols::LocateExecutableSymbolFile (const FileSpec *exec_fspec, const ArchSpec* arch, const lldb_private::UUID *uuid)
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{
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Timer scoped_timer (__PRETTY_FUNCTION__,
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"LocateExecutableSymbolFile (file = %s, arch = %s, uuid = %p)",
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exec_fspec ? exec_fspec->GetFilename().AsCString ("<NULL>") : "<NULL>",
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arch ? arch->GetArchitectureName() : "<NULL>",
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uuid);
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FileSpec symbol_fspec;
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// First try and find the dSYM in the same directory as the executable or in
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// an appropriate parent directory
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if (LocateDSYMInVincinityOfExecutable (exec_fspec, arch, uuid, symbol_fspec) == false)
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{
|
|
// We failed to easily find the dSYM above, so use DebugSymbols
|
|
LocateMacOSXFilesUsingDebugSymbols (exec_fspec, arch, uuid, NULL, &symbol_fspec);
|
|
}
|
|
return symbol_fspec;
|
|
}
|