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[llvm-dwarfdump] Add the --show-sections-sizes option

Browse Source 
Add an option to llvm-dwarfdump to calculate the bytes within
the debug sections. Dump this numbers when using --statistics
option as well.

This is an initial patch (e.g. we should support other units,
since we only support 'bytes' now).

Differential Revision: https://reviews.llvm.org/D74205
This commit is contained in:
Djordje Todorovic 2020-04-02 10:58:27 +02:00
parent f3f5e6c3a7
commit b4201a6dd9
15 changed files with 703 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
docs/CommandGuide/llvm-dwarfdump.rst
View File

@ -105,6 +105,10 @@ OPTIONS
When displaying debug info entries, only show children to a maximum
depth of <N>.
.. option:: --show-section-sizes
Show the sizes of all debug sections, expressed in bytes.
.. option:: --statistics
Collect debug info quality metrics and print the results

88
test/tools/llvm-dwarfdump/X86/Inputs/i386_macho_with_debug.yaml Normal file
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@ -0,0 +1,88 @@
--- !mach-o
FileHeader:
magic: 0xFEEDFACE
cputype: 0x00000007
cpusubtype: 0x00000003
filetype: 0x00000001
ncmds: 4
sizeofcmds: 312
flags: 0x00002000
LoadCommands:
- cmd: LC_SEGMENT
cmdsize: 192
segname: ''
vmaddr: 0
vmsize: 72
fileoff: 340
filesize: 72
maxprot: 7
initprot: 7
nsects: 2
flags: 0
Sections:
- sectname: __text
segname: __TEXT
addr: 0x0000000000000000
size: 18
offset: 0x00000154
align: 4
reloff: 0x00000000
nreloc: 0
flags: 0x80000400
reserved1: 0x00000000
reserved2: 0x00000000
reserved3: 0x00000000
- sectname: __debug_info
segname: __DWARF
addr: 0x0000000000000014
size: 52
offset: 0x00000168
align: 2
reloff: 0x00000000
nreloc: 0
flags: 0x6800000B
reserved1: 0x00000000
reserved2: 0x00000000
reserved3: 0x00000000
- cmd: LC_VERSION_MIN_MACOSX
cmdsize: 16
version: 656384
sdk: 0
- cmd: LC_SYMTAB
cmdsize: 24
symoff: 412
nsyms: 1
stroff: 424
strsize: 8
- cmd: LC_DYSYMTAB
cmdsize: 80
ilocalsym: 0
nlocalsym: 0
iextdefsym: 0
nextdefsym: 1
iundefsym: 1
nundefsym: 0
tocoff: 0
ntoc: 0
modtaboff: 0
nmodtab: 0
extrefsymoff: 0
nextrefsyms: 0
indirectsymoff: 0
nindirectsyms: 0
extreloff: 0
nextrel: 0
locreloff: 0
nlocrel: 0
LinkEditData:
NameList:
- n_strx: 1
n_type: 0x0F
n_sect: 1
n_desc: 0
n_value: 0
StringTable:
- ''
- _main
- ''
...

89
test/tools/llvm-dwarfdump/X86/Inputs/x86_64_macho_with_debug.yaml Normal file
View File

@ -0,0 +1,89 @@
--- !mach-o
FileHeader:
magic: 0xFEEDFACF
cputype: 0x01000007
cpusubtype: 0x00000003
filetype: 0x00000001
ncmds: 4
sizeofcmds: 352
flags: 0x00002000
reserved: 0x00000000
LoadCommands:
- cmd: LC_SEGMENT_64
cmdsize: 232
segname: ''
vmaddr: 0
vmsize: 80
fileoff: 384
filesize: 80
maxprot: 7
initprot: 7
nsects: 2
flags: 0
Sections:
- sectname: __text
segname: __TEXT
addr: 0x0000000000000000
size: 15
offset: 0x00000180
align: 4
reloff: 0x00000000
nreloc: 0
flags: 0x80000400
reserved1: 0x00000000
reserved2: 0x00000000
reserved3: 0x00000000
- sectname: __debug_info
segname: __DWARF
addr: 0x0000000000000010
size: 64
offset: 0x00000190
align: 3
reloff: 0x00000000
nreloc: 0
flags: 0x6800000B
reserved1: 0x00000000
reserved2: 0x00000000
reserved3: 0x00000000
- cmd: LC_VERSION_MIN_MACOSX
cmdsize: 16
version: 656384
sdk: 0
- cmd: LC_SYMTAB
cmdsize: 24
symoff: 464
nsyms: 1
stroff: 480
strsize: 8
- cmd: LC_DYSYMTAB
cmdsize: 80
ilocalsym: 0
nlocalsym: 0
iextdefsym: 0
nextdefsym: 1
iundefsym: 1
nundefsym: 0
tocoff: 0
ntoc: 0
modtaboff: 0
nmodtab: 0
extrefsymoff: 0
nextrefsyms: 0
indirectsymoff: 0
nindirectsyms: 0
extreloff: 0
nextrel: 0
locreloff: 0
nlocrel: 0
LinkEditData:
NameList:
- n_strx: 1
n_type: 0x0F
n_sect: 1
n_desc: 0
n_value: 0
StringTable:
- ''
- _main
- ''
...

66
test/tools/llvm-dwarfdump/X86/section_sizes_archive.test Normal file
View File

@ -0,0 +1,66 @@
## Check how llvm-dwarfdump calculates section sizes
## with --show-section-sizes on an archive.
# RUN: rm -rf %t && mkdir -p %t
# RUN: yaml2obj --docnum=1 %s -o %t/1.o
# RUN: yaml2obj --docnum=2 %s -o %t/2.o
# RUN: rm -f %t.a
# RUN: llvm-ar rc %t.a %t/1.o %t/2.o
# RUN: llvm-dwarfdump --show-section-sizes %t.a \
# RUN: | FileCheck %s -DARCHIVE=%t.a --match-full-lines --strict-whitespace
# CHECK:----------------------------------------------------
# CHECK-NEXT:file: [[ARCHIVE]](1.o)
# CHECK-NEXT:----------------------------------------------------
# CHECK-NEXT:SECTION SIZE (b)
# CHECK-NEXT:----------- --------
# CHECK-NEXT:.debug_info 17 (3.17%)
# CHECK-NEXT:.debug_line 19 (3.54%)
# CHECK-EMPTY:
# CHECK-NEXT: Total Size: 36 (6.72%)
# CHECK-NEXT: Total File Size: 536
# CHECK-NEXT:----------------------------------------------------
# CHECK-NEXT:----------------------------------------------------
# CHECK-NEXT:file: [[ARCHIVE]](2.o)
# CHECK-NEXT:----------------------------------------------------
# CHECK-NEXT:SECTION SIZE (b)
# CHECK-NEXT:----------- --------
# CHECK-NEXT:.debug_loc 1 (0.20%)
# CHECK-NEXT:.debug_line 13 (2.54%)
# CHECK-EMPTY:
# CHECK-NEXT: Total Size: 14 (2.73%)
# CHECK-NEXT: Total File Size: 512
# CHECK-NEXT:----------------------------------------------------
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_REL
Machine: EM_X86_64
Sections:
- Name: .text1
Type: SHT_PROGBITS
- Name: .debug_info
Type: SHT_PROGBITS
Size: 17
- Name: .debug_line
Type: SHT_PROGBITS
Size: 19
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_REL
Machine: EM_X86_64
Sections:
- Name: .text2
Type: SHT_PROGBITS
- Name: .debug_loc
Type: SHT_PROGBITS
Size: 1
- Name: .debug_line
Type: SHT_PROGBITS
Size: 13

43
test/tools/llvm-dwarfdump/X86/section_sizes_coff.test Normal file
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@ -0,0 +1,43 @@
## Check how llvm-dwarfdump calculates section sizes
## with --show-section-sizes for COFF objects.
# RUN: yaml2obj %s | llvm-dwarfdump - --show-section-sizes \
# RUN: | FileCheck %s --match-full-lines --strict-whitespace
# CHECK:----------------------------------------------------
# CHECK-NEXT:file: {{.*}}
# CHECK-NEXT:----------------------------------------------------
# CHECK-NEXT:SECTION SIZE (b)
# CHECK-NEXT:------------- --------
# CHECK-NEXT:.debug_info 2 (0.70%)
# CHECK-NEXT:.debug_abbrev 1 (0.35%)
# CHECK-NEXT:.debug_str 1 (0.35%)
# CHECK-EMPTY:
# CHECK-NEXT: Total Size: 4 (1.40%)
# CHECK-NEXT: Total File Size: 286
# CHECK-NEXT:----------------------------------------------------
--- !COFF
header:
Machine: IMAGE_FILE_MACHINE_AMD64
sections:
- Name: .bss
Characteristics: []
SectionData: ''
- Name: .debug_str
Characteristics: []
SectionData: 00
- Name: .debug_abbrev
Characteristics: []
Alignment: 1
SectionData: 00
- Name: .debug_info
Characteristics: []
SectionData: 1111
## This is a debug section following the Mach-O naming style, and is used
## to show that such sections are not included in the report.
- Name: __debug_foo
Characteristics: []
SectionData: 00
symbols:
...

55
test/tools/llvm-dwarfdump/X86/section_sizes_elf.test Normal file
View File

@ -0,0 +1,55 @@
## Check how llvm-dwarfdump calculates section sizes
## with --show-section-sizes for ELF objects.
# RUN: yaml2obj %s | llvm-dwarfdump - --show-section-sizes \
# RUN: | FileCheck %s --match-full-lines --strict-whitespace
# CHECK:----------------------------------------------------
# CHECK-NEXT:file: {{.*}}
# CHECK-NEXT:----------------------------------------------------
# CHECK-NEXT:SECTION SIZE (b)
# CHECK-NEXT:--------------- --------
# CHECK-NEXT:.debug_info 17 (1.62%)
# CHECK-NEXT:.debug_loc 1 (0.10%)
# CHECK-NEXT:.debug_type 26 (2.48%)
# CHECK-NEXT:.debug_foo 100 (9.54%)
# CHECK-NEXT:.debug_info.dwo 9 (0.86%)
# CHECK-NEXT:.debug_line 19 (1.81%)
# CHECK-EMPTY:
# CHECK-NEXT: Total Size: 172 (16.41%)
# CHECK-NEXT: Total File Size: 1048
# CHECK-NEXT:----------------------------------------------------
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_REL
Machine: EM_X86_64
Sections:
- Name: .debug_info
Type: SHT_PROGBITS
Size: 17
- Name: .debug_line
Type: SHT_PROGBITS
Size: 19
- Name: .debug_loc
Type: SHT_PROGBITS
Size: 1
- Name: .debug_type
Type: SHT_PROGBITS
Size: 13
- Name: .debug_type [1]
Type: SHT_PROGBITS
Size: 13
- Name: .debug_foo
Type: SHT_PROGBITS
Size: 100
- Name: .debug_info.dwo
Type: SHT_PROGBITS
Size: 9
## This is a debug section following the Mach-O naming style, and is used
## to show that such sections are not included in the report.
- Name: __debug_bar
Type: SHT_PROGBITS
Size: 1

31
test/tools/llvm-dwarfdump/X86/section_sizes_fat_binary.test Normal file
View File

@ -0,0 +1,31 @@
## Check how llvm-dwarfdump calculates section sizes
## with --show-section-sizes on a fat binary.
# RUN: yaml2obj %p/Inputs/i386_macho_with_debug.yaml -o %t-i386.o
# RUN: yaml2obj %p/Inputs/x86_64_macho_with_debug.yaml -o %t-x86_64.o
# RUN: llvm-lipo %t-i386.o %t-x86_64.o -create -output %t.o
# RUN: llvm-dwarfdump --show-section-sizes %t.o \
# RUN: | FileCheck %s -DFILE=%t.o --match-full-lines --strict-whitespace
# CHECK:----------------------------------------------------
# CHECK-NEXT:file: [[FILE]](i386)
# CHECK-NEXT:----------------------------------------------------
# CHECK-NEXT:SECTION SIZE (b)
# CHECK-NEXT:------------ --------
# CHECK-NEXT:__debug_info 52 (12.04%)
# CHECK-EMPTY:
# CHECK-NEXT: Total Size: 52 (12.04%)
# CHECK-NEXT: Total File Size: 432
# CHECK-NEXT:----------------------------------------------------
# CHECK-NEXT:----------------------------------------------------
# CHECK-NEXT:file: [[FILE]](x86_64)
# CHECK-NEXT:----------------------------------------------------
# CHECK-NEXT:SECTION SIZE (b)
# CHECK-NEXT:------------ --------
# CHECK-NEXT:__debug_info 64 (13.11%)
# CHECK-EMPTY:
# CHECK-NEXT: Total Size: 64 (13.11%)
# CHECK-NEXT: Total File Size: 488
# CHECK-NEXT:----------------------------------------------------

106
test/tools/llvm-dwarfdump/X86/section_sizes_macho.test Normal file
View File

@ -0,0 +1,106 @@
## Check how llvm-dwarfdump calculates section sizes
## with --show-section-sizes for Mach-O objects.
# RUN: yaml2obj %s | llvm-dwarfdump - --show-section-sizes \
# RUN: | FileCheck %s --match-full-lines --strict-whitespace
# CHECK:----------------------------------------------------
# CHECK-NEXT:file: {{.*}}
# CHECK-NEXT:----------------------------------------------------
# CHECK-NEXT:SECTION SIZE (b)
# CHECK-NEXT:------------ --------
# CHECK-NEXT:__debug_info 4 (0.93%)
# CHECK-EMPTY:
# CHECK-NEXT: Total Size: 4 (0.93%)
# CHECK-NEXT: Total File Size: 432
# CHECK-NEXT:----------------------------------------------------
--- !mach-o
FileHeader:
magic: 0xFEEDFACF
cputype: 0x01000007
cpusubtype: 0x00000003
filetype: 0x00000001
ncmds: 4
sizeofcmds: 360
flags: 0x00002000
reserved: 0x00000000
LoadCommands:
- cmd: LC_SEGMENT_64
cmdsize: 232
segname: ''
vmaddr: 0
vmsize: 4
fileoff: 392
filesize: 0
maxprot: 7
initprot: 7
nsects: 2
flags: 0
Sections:
## This is a debug section following the ELF naming style, and is used
## to show that such sections are not included in the report.
- sectname: .debug_line
segname: __DWARF
addr: 0x0000000000000000
size: 0
offset: 0x00000188
align: 0
reloff: 0x00000000
nreloc: 0
flags: 0x80000000
reserved1: 0x00000000
reserved2: 0x00000000
reserved3: 0x00000000
content: ''
- sectname: __debug_info
segname: __DWARF
addr: 0x0000000000000000
size: 4
offset: 0x00000000
align: 2
reloff: 0x00000000
nreloc: 0
flags: 0x00000001
reserved1: 0x00000000
reserved2: 0x00000000
reserved3: 0x00000000
- cmd: LC_BUILD_VERSION
cmdsize: 24
platform: 1
minos: 658944
sdk: 658944
ntools: 0
- cmd: LC_SYMTAB
cmdsize: 24
symoff: 392
nsyms: 2
stroff: 424
strsize: 8
- cmd: LC_DYSYMTAB
cmdsize: 80
ilocalsym: 0
nlocalsym: 1
iextdefsym: 1
nextdefsym: 0
iundefsym: 1
nundefsym: 1
tocoff: 0
ntoc: 0
modtaboff: 0
nmodtab: 0
extrefsymoff: 0
nextrefsyms: 0
indirectsymoff: 0
nindirectsyms: 0
extreloff: 0
nextrel: 0
locreloff: 0
nlocrel: 0
LinkEditData:
StringTable:
- ''
- _b
- _a
- ''
...

29
test/tools/llvm-dwarfdump/X86/section_sizes_no_debug_sections.test Normal file
View File

@ -0,0 +1,29 @@
## Check how llvm-dwarfdump calculates section sizes with
## --show-section-sizes in the case there isn't any debug section.
# RUN: yaml2obj %s | llvm-dwarfdump - --show-section-sizes \
# RUN: | FileCheck %s --match-full-lines --strict-whitespace
# CHECK:----------------------------------------------------
# CHECK-NEXT:file: {{.*}}
# CHECK-NEXT:----------------------------------------------------
# CHECK-NEXT:SECTION SIZE (b)
# CHECK-NEXT:------- --------
# CHECK-EMPTY:
# CHECK-NEXT: Total Size: 0 (0.00%)
# CHECK-NEXT: Total File Size: 456
# CHECK-NEXT:----------------------------------------------------
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_REL
Machine: EM_X86_64
Sections:
- Name: .foo
Type: SHT_PROGBITS
Size: 17
- Name: .bar
Type: SHT_PROGBITS
Size: 19

6
test/tools/llvm-dwarfdump/X86/statistics.ll
View File

@ -48,7 +48,11 @@
; CHECK: "scope bytes covered":
; CHECK: "total function size":[[FUNCSIZE:[0-9]+]]
; CHECK: "total inlined function size":[[INLINESIZE:[0-9]+]]
; CHECK: "size of __debug_info":380
; CHECK: "size of __debug_loc":35
; CHECK: "size of __debug_abbrev":303
; CHECK: "size of __debug_line":117
; CHECK: "size of __debug_str":204
; ModuleID = '/tmp/quality.cpp'
source_filename = "/tmp/quality.cpp"

1
tools/llvm-dwarfdump/CMakeLists.txt
View File

@ -8,6 +8,7 @@ set(LLVM_LINK_COMPONENTS
)
add_llvm_tool(llvm-dwarfdump
SectionSizes.cpp
Statistics.cpp
llvm-dwarfdump.cpp
)

120
tools/llvm-dwarfdump/SectionSizes.cpp Normal file
View File

@ -0,0 +1,120 @@
//===-- SectionSizes.cpp - Debug section sizes ----------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "SectionSizes.h"
#define DEBUG_TYPE "dwarfdump"
using namespace llvm;
using namespace object;
static size_t getNameColumnWidth(const SectionSizes &Sizes,
const StringRef SectionNameTitle) {
// The minimum column width should be the size of "SECTION".
size_t Width = SectionNameTitle.size();
for (const auto &DebugSec : Sizes.DebugSectionSizes) {
StringRef SectionName = DebugSec.getKey();
Width = std::max(Width, SectionName.size());
}
return Width;
}
static size_t getSizeColumnWidth(const SectionSizes &Sizes,
const StringRef SectionSizeTitle) {
// The minimum column width should be the size of the column title.
size_t Width = SectionSizeTitle.size();
for (const auto &DebugSec : Sizes.DebugSectionSizes) {
size_t NumWidth = std::to_string(DebugSec.getValue()).size();
Width = std::max(Width, NumWidth);
}
return Width;
}
static void prettyPrintSectionSizes(const ObjectFile &Obj,
const SectionSizes &Sizes,
raw_ostream &OS) {
const StringRef SectionNameTitle = "SECTION";
const StringRef SectionSizeTitle = "SIZE (b)";
size_t NameColWidth = getNameColumnWidth(Sizes, SectionNameTitle);
size_t SizeColWidth = getSizeColumnWidth(Sizes, SectionSizeTitle);
OS << "----------------------------------------------------" << '\n';
OS << SectionNameTitle;
size_t SectionNameTitleWidth = SectionNameTitle.size();
for (unsigned i = 0; i < (NameColWidth - SectionNameTitleWidth) + 2; i++)
OS << " ";
OS << SectionSizeTitle << '\n';
for (unsigned i = 0; i < NameColWidth; i++)
OS << "-";
OS << " ";
for (unsigned i = 0; i < SizeColWidth; i++)
OS << "-";
OS << '\n';
for (const auto &DebugSec : Sizes.DebugSectionSizes) {
OS << left_justify(DebugSec.getKey(), NameColWidth) << " ";
auto NumBytes = std::to_string(DebugSec.getValue());
OS << right_justify(NumBytes, SizeColWidth) << " ("
<< format("%0.2f", DebugSec.getValue() /
static_cast<double>(Sizes.TotalObjectSize) * 100)
<< "%)\n";
}
OS << '\n';
OS << " Total Size: " << Sizes.TotalDebugSectionsSize << " ("
<< format("%0.2f", Sizes.TotalDebugSectionsSize /
static_cast<double>(Sizes.TotalObjectSize) * 100)
<< "%)\n";
OS << " Total File Size: " << Sizes.TotalObjectSize << '\n';
OS << "----------------------------------------------------" << '\n';
}
void llvm::calculateSectionSizes(const ObjectFile &Obj, SectionSizes &Sizes,
const Twine &Filename) {
// Get total size.
Sizes.TotalObjectSize = Obj.getData().size();
for (const SectionRef &Section : Obj.sections()) {
StringRef SectionName;
if (Expected<StringRef> NameOrErr = Section.getName())
SectionName = *NameOrErr;
else
WithColor::defaultWarningHandler(
createFileError(Filename, NameOrErr.takeError()));
LLVM_DEBUG(dbgs() << SectionName.str() << ": " << Section.getSize()
<< '\n');
if (!Section.isDebugSection(SectionName))
continue;
Sizes.TotalDebugSectionsSize += Section.getSize();
Sizes.DebugSectionSizes[SectionName] += Section.getSize();
}
}
bool collectObjectSectionSizes(ObjectFile &Obj, DWARFContext & /*DICtx*/,
const Twine &Filename, raw_ostream &OS) {
SectionSizes Sizes;
// Get the section sizes.
calculateSectionSizes(Obj, Sizes, Filename);
OS << "----------------------------------------------------\n";
OS << "file: " << Filename.str() << '\n';
prettyPrintSectionSizes(Obj, Sizes, OS);
// TODO: If the input file is an archive, print the cumulative summary of all
// files from the archive.
return true;
}

38
tools/llvm-dwarfdump/SectionSizes.h Normal file
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@ -0,0 +1,38 @@
//===- SectionSizes.h - Debug section sizes ---------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===-----------------------------------------------------------------------===/
#ifndef LLVM_TOOLS_SECTION_SIZES_H
#define LLVM_TOOLS_SECTION_SIZES_H
#include "llvm/DebugInfo/DIContext.h"
#include "llvm/DebugInfo/DWARF/DWARFContext.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/WithColor.h"
namespace llvm {
using SectionSizeMap = StringMap<uint64_t>;
/// Holds cumulative section sizes for an object file.
struct SectionSizes {
/// Map of .debug section names and their sizes across all such-named
/// sections.
SectionSizeMap DebugSectionSizes;
/// Total number of bytes of all sections.
uint64_t TotalObjectSize = 0;
/// Total number of bytes of all debug sections.
uint64_t TotalDebugSectionsSize = 0;
};
/// Calculate the section sizes.
void calculateSectionSizes(const object::ObjectFile &Obj, SectionSizes &Sizes,
const Twine &Filename);
} // end namespace llvm
#endif // LLVM_TOOLS_SECTION_SIZES_H

14
tools/llvm-dwarfdump/Statistics.cpp
View File

@ -15,6 +15,8 @@
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/JSON.h"
#include "SectionSizes.h"
#define DEBUG_TYPE "dwarfdump"
using namespace llvm;
using namespace object;
@ -468,6 +470,7 @@ static void printDatum(raw_ostream &OS, const char *Key, json::Value Value) {
OS << ",\"" << Key << "\":" << Value;
LLVM_DEBUG(llvm::dbgs() << Key << ": " << Value << '\n');
}
static void printLocationStats(raw_ostream &OS,
const char *Key,
std::vector<unsigned> &LocationStats) {
@ -491,6 +494,12 @@ static void printLocationStats(raw_ostream &OS,
LLVM_DEBUG(llvm::dbgs() << Key << " with 100% of its scope covered: "
<< LocationStats[NumOfCoverageCategories - 1]);
}
static void printSectionSizes(raw_ostream &OS, const SectionSizes &Sizes) {
for (const auto &DebugSec : Sizes.DebugSectionSizes)
OS << ",\"size of " << DebugSec.getKey() << "\":" << DebugSec.getValue();
}
/// \}
/// Collect debug info quality metrics for an entire DIContext.
@ -512,6 +521,10 @@ bool collectStatsForObjectFile(ObjectFile &Obj, DWARFContext &DICtx,
collectStatsRecursive(CUDie, "/", "g", 0, 0, Statistics, GlobalStats,
LocStats);
/// Collect the sizes of debug sections.
SectionSizes Sizes;
calculateSectionSizes(Obj, Sizes, Filename);
/// The version number should be increased every time the algorithm is changed
/// (including bug fixes). New metrics may be added without increasing the
/// version.
@ -602,6 +615,7 @@ bool collectStatsForObjectFile(ObjectFile &Obj, DWARFContext &DICtx,
printDatum(OS, "vars with binary location", VarWithLoc);
printDatum(OS, "total variables procesed by location statistics",
LocStats.NumVarParam);
printSectionSizes(OS, Sizes);
printLocationStats(OS, "variables", LocStats.VarParamLocStats);
printLocationStats(OS, "variables (excluding the debug entry values)",
LocStats.VarParamNonEntryValLocStats);

16
tools/llvm-dwarfdump/llvm-dwarfdump.cpp
View File

@ -208,6 +208,11 @@ static cl::opt<bool>
Statistics("statistics",
cl::desc("Emit JSON-formatted debug info quality metrics."),
cat(DwarfDumpCategory));
static cl::opt<bool>
ShowSectionSizes("show-section-sizes",
cl::desc("Show the sizes of all debug sections, "
"expressed in bytes."),
cat(DwarfDumpCategory));
static opt<bool> Verify("verify", desc("Verify the DWARF debug info."),
cat(DwarfDumpCategory));
static opt<bool> Quiet("quiet", desc("Use with -verify to not emit to STDOUT."),
@ -413,6 +418,9 @@ static bool lookup(ObjectFile &Obj, DWARFContext &DICtx, uint64_t Address,
bool collectStatsForObjectFile(ObjectFile &Obj, DWARFContext &DICtx,
const Twine &Filename, raw_ostream &OS);
bool collectObjectSectionSizes(ObjectFile &Obj, DWARFContext & /*DICtx*/,
const Twine &Filename, raw_ostream &OS);
static bool dumpObjectFile(ObjectFile &Obj, DWARFContext &DICtx,
const Twine &Filename, raw_ostream &OS) {
logAllUnhandledErrors(DICtx.loadRegisterInfo(Obj), errs(),
@ -635,12 +643,16 @@ int main(int argc, char **argv) {
return handleFile(Object, verifyObjectFile, OutputFile.os());
}))
return 1;
} else if (Statistics)
} else if (Statistics) {
for (auto Object : Objects)
handleFile(Object, collectStatsForObjectFile, OutputFile.os());
else
} else if (ShowSectionSizes) {
for (auto Object : Objects)
handleFile(Object, collectObjectSectionSizes, OutputFile.os());
} else {
for (auto Object : Objects)
handleFile(Object, dumpObjectFile, OutputFile.os());
}
return EXIT_SUCCESS;
}