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[llvm-pdbutil] Print detailed S_UDT stats.

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This adds a new command line option, -udt-stats, which breaks
down the stats of S_UDT records.  These are one of the biggest
contributors to the size of /DEBUG:FASTLINK PDBs, so they need
some additional tools to be able to analyze their usage.  This
option will dig into each S_UDT record and determine what kind
of record it points to, and then break down the statistics by
the target type.  The goal here is to identify how our object
files differ from MSVC object files in S_UDT records, so that
we can output fewer of them and reach size parity.

llvm-svn: 312276
This commit is contained in:
Zachary Turner 2017-08-31 20:43:22 +00:00
parent ba2056f9d1
commit 389bcb458f
11 changed files with 222 additions and 37 deletions
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2
include/llvm/DebugInfo/PDB/Native/SymbolStream.h
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@ -31,6 +31,8 @@ public:
return SymbolRecords;
}
codeview::CVSymbol readRecord(uint32_t Offset) const;
iterator_range<codeview::CVSymbolArray::Iterator>
getSymbols(bool *HadError) const;

6
lib/DebugInfo/PDB/Native/SymbolStream.cpp
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@ -10,7 +10,7 @@
#include "llvm/DebugInfo/PDB/Native/SymbolStream.h"
#include "llvm/DebugInfo/CodeView/CodeView.h"
#include "llvm/DebugInfo/CodeView/TypeRecord.h"
#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
#include "llvm/DebugInfo/MSF/MappedBlockStream.h"
#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
#include "llvm/DebugInfo/PDB/Native/RawConstants.h"
@ -43,3 +43,7 @@ SymbolStream::getSymbols(bool *HadError) const {
}
Error SymbolStream::commit() { return Error::success(); }
codeview::CVSymbol SymbolStream::readRecord(uint32_t Offset) const {
return *SymbolRecords.at(Offset);
}

4
test/DebugInfo/PDB/module-stats.test
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@ -1,5 +1,5 @@
; RUN: llvm-pdbutil dump -mod-stats %p/Inputs/empty.pdb | FileCheck --check-prefix=ALL %s
; RUN: llvm-pdbutil dump -mod-stats -modi=1 %p/Inputs/empty.pdb | FileCheck --check-prefix=ONE %s
; RUN: llvm-pdbutil dump -sym-stats %p/Inputs/empty.pdb | FileCheck --check-prefix=ALL %s
; RUN: llvm-pdbutil dump -sym-stats -modi=1 %p/Inputs/empty.pdb | FileCheck --check-prefix=ONE %s
ALL: Mod 0000 | `d:\src\llvm\test\DebugInfo\PDB\Inputs\empty.obj`:
ALL-NEXT: Stream 12, 308 bytes

15
test/DebugInfo/PDB/udt-stats.test Normal file
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@ -0,0 +1,15 @@
; RUN: llvm-pdbutil dump -udt-stats %p/Inputs/big-read.pdb | FileCheck %s
CHECK: S_UDT Record Stats
CHECK-NEXT: ============================================================
CHECK: Record Kind | Count Size
CHECK-NEXT: -----------------------------
CHECK-NEXT: LF_ENUM | 3 188
CHECK-NEXT: LF_POINTER | 39 468
CHECK-NEXT: LF_UNION | 1 52
CHECK-NEXT: <simple type> | 43 0
CHECK-NEXT: LF_PROCEDURE | 1 16
CHECK-NEXT: LF_STRUCTURE | 27 1,788
CHECK-NEXT: -----------------------------
CHECK-NEXT: Total (S_UDT) | 114 2,604
CHECK-NEXT: -----------------------------

161
tools/llvm-pdbutil/DumpOutputStyle.cpp
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@ -59,6 +59,7 @@
#include "llvm/Support/FormatAdapters.h"
#include "llvm/Support/FormatVariadic.h"
#include <cctype>
#include <unordered_map>
using namespace llvm;
@ -82,8 +83,14 @@ Error DumpOutputStyle::dump() {
P.NewLine();
}
if (opts::dump::DumpModuleStats.getNumOccurrences() > 0) {
if (auto EC = dumpModuleStats())
if (opts::dump::DumpSymbolStats.getNumOccurrences() > 0) {
if (auto EC = dumpSymbolStats())
return EC;
P.NewLine();
}
if (opts::dump::DumpUdtStats.getNumOccurrences() > 0) {
if (auto EC = dumpUdtStats())
return EC;
P.NewLine();
}
@ -557,7 +564,7 @@ Error DumpOutputStyle::dumpModuleFiles() {
return Error::success();
}
Error DumpOutputStyle::dumpModuleStats() {
Error DumpOutputStyle::dumpSymbolStats() {
printHeader(P, "Module Stats");
ExitOnError Err("Unexpected error processing modules: ");
@ -607,6 +614,154 @@ Error DumpOutputStyle::dumpModuleStats() {
return Error::success();
}
static bool isValidNamespaceIdentifier(StringRef S) {
if (S.empty())
return false;
if (std::isdigit(S[0]))
return false;
return llvm::all_of(S, [](char C) { return std::isalnum(C); });
}
namespace {
constexpr uint32_t kNoneUdtKind = 0;
constexpr uint32_t kSimpleUdtKind = 1;
constexpr uint32_t kUnknownUdtKind = 2;
const StringRef NoneLabel("<none type>");
const StringRef SimpleLabel("<simple type>");
const StringRef UnknownLabel("<unknown type>");
} // namespace
static StringRef getUdtStatLabel(uint32_t Kind) {
if (Kind == kNoneUdtKind)
return NoneLabel;
if (Kind == kSimpleUdtKind)
return SimpleLabel;
if (Kind == kUnknownUdtKind)
return UnknownLabel;
return formatTypeLeafKind(static_cast<TypeLeafKind>(Kind));
}
static uint32_t getLongestTypeLeafName(const StatCollection &Stats) {
size_t L = 0;
for (const auto &Stat : Stats.Individual) {
StringRef Label = getUdtStatLabel(Stat.first);
L = std::max(L, Label.size());
}
return static_cast<uint32_t>(L);
}
Error DumpOutputStyle::dumpUdtStats() {
printHeader(P, "S_UDT Record Stats");
StatCollection UdtStats;
StatCollection UdtTargetStats;
if (!File.hasPDBGlobalsStream()) {
P.printLine("- Error: globals stream not present");
return Error::success();
}
AutoIndent Indent(P, 4);
auto &SymbolRecords = cantFail(File.getPDBSymbolStream());
auto &Globals = cantFail(File.getPDBGlobalsStream());
auto &TpiTypes = cantFail(initializeTypes(StreamTPI));
StringMap<StatCollection::Stat> NamespacedStats;
P.NewLine();
size_t LongestNamespace = 0;
for (uint32_t PubSymOff : Globals.getGlobalsTable()) {
CVSymbol Sym = SymbolRecords.readRecord(PubSymOff);
if (Sym.kind() != SymbolKind::S_UDT)
continue;
UdtStats.update(SymbolKind::S_UDT, Sym.length());
UDTSym UDT = cantFail(SymbolDeserializer::deserializeAs<UDTSym>(Sym));
uint32_t Kind = 0;
uint32_t RecordSize = 0;
if (UDT.Type.isSimple() ||
(UDT.Type.toArrayIndex() >= TpiTypes.capacity())) {
if (UDT.Type.isNoneType())
Kind = kNoneUdtKind;
else if (UDT.Type.isSimple())
Kind = kSimpleUdtKind;
else
Kind = kUnknownUdtKind;
} else {
CVType T = TpiTypes.getType(UDT.Type);
Kind = T.kind();
RecordSize = T.length();
}
UdtTargetStats.update(Kind, RecordSize);
size_t Pos = UDT.Name.find("::");
if (Pos == StringRef::npos)
continue;
StringRef Scope = UDT.Name.take_front(Pos);
if (Scope.empty() || !isValidNamespaceIdentifier(Scope))
continue;
LongestNamespace = std::max(LongestNamespace, Scope.size());
NamespacedStats[Scope].update(RecordSize);
}
LongestNamespace += StringRef(" namespace ''").size();
uint32_t LongestTypeLeafKind = getLongestTypeLeafName(UdtTargetStats);
uint32_t FieldWidth = std::max(LongestNamespace, LongestTypeLeafKind);
// Compute the max number of digits for count and size fields, including comma
// separators.
StringRef CountHeader("Count");
StringRef SizeHeader("Size");
uint32_t CD = NumDigits(UdtStats.Totals.Count);
CD += (CD - 1) / 3;
CD = std::max(CD, CountHeader.size());
uint32_t SD = NumDigits(UdtStats.Totals.Size);
SD += (SD - 1) / 3;
SD = std::max(SD, SizeHeader.size());
uint32_t TableWidth = FieldWidth + 3 + CD + 2 + SD + 1;
P.formatLine("{0} | {1} {2}",
fmt_align("Record Kind", AlignStyle::Right, FieldWidth),
fmt_align(CountHeader, AlignStyle::Right, CD),
fmt_align(SizeHeader, AlignStyle::Right, SD));
P.formatLine("{0}", fmt_repeat('-', TableWidth));
for (const auto &Stat : UdtTargetStats.Individual) {
StringRef Label = getUdtStatLabel(Stat.first);
P.formatLine("{0} | {1:N} {2:N}",
fmt_align(Label, AlignStyle::Right, FieldWidth),
fmt_align(Stat.second.Count, AlignStyle::Right, CD),
fmt_align(Stat.second.Size, AlignStyle::Right, SD));
}
P.formatLine("{0}", fmt_repeat('-', TableWidth));
P.formatLine("{0} | {1:N} {2:N}",
fmt_align("Total (S_UDT)", AlignStyle::Right, FieldWidth),
fmt_align(UdtStats.Totals.Count, AlignStyle::Right, CD),
fmt_align(UdtStats.Totals.Size, AlignStyle::Right, SD));
P.formatLine("{0}", fmt_repeat('-', TableWidth));
for (const auto &Stat : NamespacedStats) {
std::string Label = formatv("namespace '{0}'", Stat.getKey());
P.formatLine("{0} | {1:N} {2:N}",
fmt_align(Label, AlignStyle::Right, FieldWidth),
fmt_align(Stat.second.Count, AlignStyle::Right, CD),
fmt_align(Stat.second.Size, AlignStyle::Right, SD));
}
return Error::success();
}
static void typesetLinesAndColumns(PDBFile &File, LinePrinter &P,
uint32_t Start, const LineColumnEntry &E) {
const uint32_t kMaxCharsPerLineNumber = 4; // 4 digit line number

3
tools/llvm-pdbutil/DumpOutputStyle.h
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@ -66,7 +66,8 @@ private:
Error dumpFileSummary();
Error dumpStreamSummary();
Error dumpModuleStats();
Error dumpSymbolStats();
Error dumpUdtStats();
Error dumpStringTable();
Error dumpLines();
Error dumpInlineeLines();

12
tools/llvm-pdbutil/FormatUtil.cpp
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@ -157,6 +157,18 @@ std::string llvm::pdb::formatSymbolKind(SymbolKind K) {
return formatUnknownEnum(K);
}
StringRef llvm::pdb::formatTypeLeafKind(TypeLeafKind K) {
switch (K) {
#define TYPE_RECORD(EnumName, value, name) \
case EnumName: \
return #EnumName;
#include "llvm/DebugInfo/CodeView/CodeViewTypes.def"
default:
llvm_unreachable("Unknown type leaf kind!");
}
return "";
}
std::string llvm::pdb::formatSegmentOffset(uint16_t Segment, uint32_t Offset) {
return formatv("{0:4}:{1:4}", Segment, Offset);
}

1
tools/llvm-pdbutil/FormatUtil.h
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@ -68,6 +68,7 @@ std::string typesetStringList(uint32_t IndentLevel,
std::string formatChunkKind(codeview::DebugSubsectionKind Kind,
bool Friendly = true);
std::string formatSymbolKind(codeview::SymbolKind K);
StringRef formatTypeLeafKind(codeview::TypeLeafKind K);
/// Returns the number of digits in the given integer.
inline int NumDigits(uint64_t N) {

18
tools/llvm-pdbutil/MinimalTypeDumper.cpp
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@ -26,18 +26,6 @@ using namespace llvm;
using namespace llvm::codeview;
using namespace llvm::pdb;
static StringRef getLeafTypeName(TypeLeafKind K) {
switch (K) {
#define TYPE_RECORD(EnumName, value, name) \
case EnumName: \
return #EnumName;
#include "llvm/DebugInfo/CodeView/CodeViewTypes.def"
default:
llvm_unreachable("Unknown type leaf kind!");
}
return "";
}
static std::string formatClassOptions(uint32_t IndentLevel,
ClassOptions Options) {
std::vector<std::string> Opts;
@ -212,7 +200,7 @@ Error MinimalTypeDumpVisitor::visitTypeBegin(CVType &Record, TypeIndex Index) {
if (!Hashes) {
P.formatLine("{0} | {1} [size = {2}]",
fmt_align(Index, AlignStyle::Right, Width),
getLeafTypeName(Record.Type), Record.length());
formatTypeLeafKind(Record.Type), Record.length());
} else {
std::string H;
if (Index.toArrayIndex() >= HashValues.size()) {
@ -231,7 +219,7 @@ Error MinimalTypeDumpVisitor::visitTypeBegin(CVType &Record, TypeIndex Index) {
}
P.formatLine("{0} | {1} [size = {2}, hash = {3}]",
fmt_align(Index, AlignStyle::Right, Width),
getLeafTypeName(Record.Type), Record.length(), H);
formatTypeLeafKind(Record.Type), Record.length(), H);
}
P.Indent(Width + 3);
return Error::success();
@ -246,7 +234,7 @@ Error MinimalTypeDumpVisitor::visitTypeEnd(CVType &Record) {
}
Error MinimalTypeDumpVisitor::visitMemberBegin(CVMemberRecord &Record) {
P.formatLine("- {0}", getLeafTypeName(Record.Kind));
P.formatLine("- {0}", formatTypeLeafKind(Record.Kind));
return Error::success();
}

34
tools/llvm-pdbutil/llvm-pdbutil.cpp
View File

@ -422,10 +422,15 @@ cl::opt<bool> DumpStreamBlocks(
"stream-blocks",
cl::desc("Add block information to the output of -streams"),
cl::cat(MsfOptions), cl::sub(DumpSubcommand));
cl::opt<bool>
DumpModuleStats("mod-stats",
cl::desc("Dump a detailed size breakdown for each module"),
cl::cat(MsfOptions), cl::sub(DumpSubcommand));
cl::opt<bool> DumpSymbolStats(
"sym-stats",
cl::desc("Dump a detailed breakdown of symbol usage/size for each module"),
cl::cat(MsfOptions), cl::sub(DumpSubcommand));
cl::opt<bool> DumpUdtStats(
"udt-stats",
cl::desc("Dump a detailed breakdown of S_UDT record usage / stats"),
cl::cat(MsfOptions), cl::sub(DumpSubcommand));
// TYPE OPTIONS
cl::opt<bool> DumpTypes("types",
@ -1095,27 +1100,28 @@ int main(int argc_, const char *argv_[]) {
if (opts::DumpSubcommand) {
if (opts::dump::RawAll) {
opts::dump::DumpLines = true;
opts::dump::DumpInlineeLines = true;
opts::dump::DumpXme = true;
opts::dump::DumpXmi = true;
opts::dump::DumpIds = true;
opts::dump::DumpGlobals = true;
opts::dump::DumpInlineeLines = true;
opts::dump::DumpIds = true;
opts::dump::DumpIdExtras = true;
opts::dump::DumpLines = true;
opts::dump::DumpModules = true;
opts::dump::DumpModuleFiles = true;
opts::dump::DumpPublics = true;
opts::dump::DumpSectionContribs = true;
opts::dump::DumpSectionHeaders = true;
opts::dump::DumpSectionMap = true;
opts::dump::DumpStreams = true;
opts::dump::DumpStreamBlocks = true;
opts::dump::DumpStringTable = true;
opts::dump::DumpSectionHeaders = true;
opts::dump::DumpSummary = true;
opts::dump::DumpSymbols = true;
opts::dump::DumpIds = true;
opts::dump::DumpIdExtras = true;
opts::dump::DumpSymbolStats = true;
opts::dump::DumpTypes = true;
opts::dump::DumpTypeExtras = true;
opts::dump::DumpModules = true;
opts::dump::DumpModuleFiles = true;
opts::dump::DumpUdtStats = true;
opts::dump::DumpXme = true;
opts::dump::DumpXmi = true;
}
}
if (opts::PdbToYamlSubcommand) {

3
tools/llvm-pdbutil/llvm-pdbutil.h
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@ -127,7 +127,8 @@ namespace dump {
extern llvm::cl::opt<bool> DumpSummary;
extern llvm::cl::opt<bool> DumpFpm;
extern llvm::cl::opt<bool> DumpStreams;
extern llvm::cl::opt<bool> DumpModuleStats;
extern llvm::cl::opt<bool> DumpSymbolStats;
extern llvm::cl::opt<bool> DumpUdtStats;
extern llvm::cl::opt<bool> DumpStreamBlocks;
extern llvm::cl::opt<bool> DumpLines;