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[lldb][NFC] Refactor getUUID functionality 

Differential Revision: https://reviews.llvm.org/D90325
This commit is contained in:
Zequan Wu 2020-10-28 11:23:56 -07:00
parent 79657e2339
commit 4348e0eee4
6 changed files with 42 additions and 101 deletions
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17
lldb/include/lldb/Utility/UUID.h
View File

@ -11,6 +11,7 @@
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Endian.h"
#include <stddef.h>
#include <stdint.h>
#include <string>
@ -23,6 +24,22 @@ class UUID {
public:
UUID() = default;
// Reference:
// https://crashpad.chromium.org/doxygen/structcrashpad_1_1CodeViewRecordPDB70.html
struct CvRecordPdb70 {
struct {
llvm::support::ulittle32_t Data1;
llvm::support::ulittle16_t Data2;
llvm::support::ulittle16_t Data3;
uint8_t Data4[8];
} Uuid;
llvm::support::ulittle32_t Age;
// char PDBFileName[];
};
/// Create a UUID from CvRecordPdb70.
static UUID fromCvRecord(CvRecordPdb70 debug_info);
/// Creates a UUID from the data pointed to by the bytes argument. No special
/// significance is attached to any of the values.
static UUID fromData(const void *bytes, uint32_t num_bytes) {

40
lldb/source/Plugins/ObjectFile/PDB/ObjectFilePDB.cpp
View File

@ -27,43 +27,11 @@ using namespace llvm::codeview;
LLDB_PLUGIN_DEFINE(ObjectFilePDB)
struct CVInfoPdb70 {
// 16-byte GUID
struct _Guid {
llvm::support::ulittle32_t Data1;
llvm::support::ulittle16_t Data2;
llvm::support::ulittle16_t Data3;
uint8_t Data4[8];
} Guid;
llvm::support::ulittle32_t Age;
};
static UUID GetPDBUUID(InfoStream &IS) {
// This part is similar with what has done in ObjectFilePECOFF.
using llvm::support::endian::read16be;
using llvm::support::endian::read32;
using llvm::support::endian::read32be;
GUID guid = IS.getGuid();
const uint8_t *guid_p = guid.Guid;
struct CVInfoPdb70 info;
info.Guid.Data1 = read32be(guid_p);
guid_p += 4;
info.Guid.Data2 = read16be(guid_p);
guid_p += 2;
info.Guid.Data3 = read16be(guid_p);
guid_p += 2;
memcpy(info.Guid.Data4, guid_p, 8);
// Return 20-byte UUID if the Age is not zero
uint32_t age = IS.getAge();
if (age) {
info.Age = read32(&age, llvm::support::big);
return UUID::fromOptionalData(&info, sizeof(info));
}
// Otherwise return 16-byte GUID
return UUID::fromOptionalData(&info.Guid, sizeof(info.Guid));
UUID::CvRecordPdb70 debug_info;
memcpy(&debug_info.Uuid, IS.getGuid().Guid, sizeof(debug_info.Uuid));
debug_info.Age = IS.getAge();
return UUID::fromCvRecord(debug_info);
}
char ObjectFilePDB::ID;

37
lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
View File

@ -43,45 +43,16 @@ using namespace lldb_private;
LLDB_PLUGIN_DEFINE(ObjectFilePECOFF)
struct CVInfoPdb70 {
// 16-byte GUID
struct _Guid {
llvm::support::ulittle32_t Data1;
llvm::support::ulittle16_t Data2;
llvm::support::ulittle16_t Data3;
uint8_t Data4[8];
} Guid;
llvm::support::ulittle32_t Age;
};
static UUID GetCoffUUID(llvm::object::COFFObjectFile &coff_obj) {
const llvm::codeview::DebugInfo *pdb_info = nullptr;
llvm::StringRef pdb_file;
// This part is similar with what has done in minidump parser.
if (!coff_obj.getDebugPDBInfo(pdb_info, pdb_file) && pdb_info) {
if (pdb_info->PDB70.CVSignature == llvm::OMF::Signature::PDB70) {
using llvm::support::endian::read16be;
using llvm::support::endian::read32be;
const uint8_t *sig = pdb_info->PDB70.Signature;
struct CVInfoPdb70 info;
info.Guid.Data1 = read32be(sig);
sig += 4;
info.Guid.Data2 = read16be(sig);
sig += 2;
info.Guid.Data3 = read16be(sig);
sig += 2;
memcpy(info.Guid.Data4, sig, 8);
// Return 20-byte UUID if the Age is not zero
if (pdb_info->PDB70.Age) {
info.Age = read32be(&pdb_info->PDB70.Age);
return UUID::fromOptionalData(&info, sizeof(info));
}
// Otherwise return 16-byte GUID
return UUID::fromOptionalData(&info.Guid, sizeof(info.Guid));
UUID::CvRecordPdb70 info;
memcpy(&info.Uuid, pdb_info->PDB70.Signature, sizeof(info.Uuid));
info.Age = pdb_info->PDB70.Age;
return UUID::fromCvRecord(info);
}
}

24
lldb/source/Plugins/Process/minidump/MinidumpParser.cpp
View File

@ -62,27 +62,17 @@ UUID MinidumpParser::GetModuleUUID(const minidump::Module *module) {
static_cast<CvSignature>(static_cast<uint32_t>(*signature));
if (cv_signature == CvSignature::Pdb70) {
const CvRecordPdb70 *pdb70_uuid = nullptr;
const UUID::CvRecordPdb70 *pdb70_uuid = nullptr;
Status error = consumeObject(cv_record, pdb70_uuid);
if (error.Fail())
return UUID();
CvRecordPdb70 swapped;
if (!GetArchitecture().GetTriple().isOSBinFormatELF()) {
// LLDB's UUID class treats the data as a sequence of bytes, but breakpad
// interprets it as a sequence of little-endian fields, which it converts
// to big-endian when converting to text. Swap the bytes to big endian so
// that the string representation comes out right.
swapped = *pdb70_uuid;
llvm::sys::swapByteOrder(swapped.Uuid.Data1);
llvm::sys::swapByteOrder(swapped.Uuid.Data2);
llvm::sys::swapByteOrder(swapped.Uuid.Data3);
llvm::sys::swapByteOrder(swapped.Age);
pdb70_uuid = &swapped;
if (GetArchitecture().GetTriple().isOSBinFormatELF()) {
if (pdb70_uuid->Age != 0)
return UUID::fromOptionalData(pdb70_uuid, sizeof(*pdb70_uuid));
return UUID::fromOptionalData(&pdb70_uuid->Uuid,
sizeof(pdb70_uuid->Uuid));
}
if (pdb70_uuid->Age != 0)
return UUID::fromOptionalData(pdb70_uuid, sizeof(*pdb70_uuid));
return UUID::fromOptionalData(&pdb70_uuid->Uuid, sizeof(pdb70_uuid->Uuid));
return UUID::fromCvRecord(*pdb70_uuid);
} else if (cv_signature == CvSignature::ElfBuildId)
return UUID::fromOptionalData(cv_record);

15
lldb/source/Plugins/Process/minidump/MinidumpTypes.h
View File

@ -40,21 +40,6 @@ enum class CvSignature : uint32_t {
ElfBuildId = 0x4270454c, // BpEL (Breakpad/Crashpad minidumps)
};
// Reference:
// https://crashpad.chromium.org/doxygen/structcrashpad_1_1CodeViewRecordPDB70.html
struct CvRecordPdb70 {
struct {
llvm::support::ulittle32_t Data1;
llvm::support::ulittle16_t Data2;
llvm::support::ulittle16_t Data3;
uint8_t Data4[8];
} Uuid;
llvm::support::ulittle32_t Age;
// char PDBFileName[];
};
static_assert(sizeof(CvRecordPdb70) == 20,
"sizeof CvRecordPdb70 is not correct!");
enum class MinidumpMiscInfoFlags : uint32_t {
ProcessID = (1 << 0),
ProcessTimes = (1 << 1),

10
lldb/source/Utility/UUID.cpp
View File

@ -35,6 +35,16 @@ static inline bool separate(size_t count) {
}
}
UUID UUID::fromCvRecord(UUID::CvRecordPdb70 debug_info) {
llvm::sys::swapByteOrder(debug_info.Uuid.Data1);
llvm::sys::swapByteOrder(debug_info.Uuid.Data2);
llvm::sys::swapByteOrder(debug_info.Uuid.Data3);
llvm::sys::swapByteOrder(debug_info.Age);
if (debug_info.Age)
return UUID::fromOptionalData(&debug_info, sizeof(debug_info));
return UUID::fromOptionalData(&debug_info.Uuid, sizeof(debug_info.Uuid));
}
std::string UUID::GetAsString(llvm::StringRef separator) const {
std::string result;
llvm::raw_string_ostream os(result);