[llvm] [llvm-gsymutil] Option --symtab-file to specify a separate binary (PR #79898)
via llvm-commits
llvm-commits at lists.llvm.org
Mon Jan 29 12:55:59 PST 2024
https://github.com/kusmour created https://github.com/llvm/llvm-project/pull/79898
Summary:
There are cases where separate debuginfo file only contains DWARF and symbol table exists in the executable. Offer a flag to specify a separate file for llvm-gsymutil to extract symbol table from.
NOTE: Not supporting this flag for `MachOUniversalBinary` yet, as dSYM usually contains both
Test Plan:
Added FileCheck tests
```
./bin/llvm-lit -sv llvm/test/tools/llvm-gsymutil/X86/elf-dwarf-only.yaml
./bin/llvm-lit -sv llvm/test/tools/llvm-gsymutil/X86/elf-symtab.yaml
```
>From 0393fd75800078c9040c49ede2b4e5ffd79e0c1a Mon Sep 17 00:00:00 2001
From: Wanyi Ye <wanyi at fb.com>
Date: Mon, 29 Jan 2024 12:08:08 -0800
Subject: [PATCH] [llvm-gsymutil] Option --symtab-file to specify a separate
binary
Summary:
There are cases where separate debuginfo file only contains DWARF and symbol table exists in the executable.
Offer a flag to specify a separate file for llvm-gsymutil to extract symbol table from.
NOTE: Not supporting this flag for `MachOUniversalBinary` yet, as dSYM usually contains both
Test Plan:
Added FileCheck tests
```
./bin/llvm-lit -sv llvm/test/tools/llvm-gsymutil/X86/elf-dwarf-only.yaml
./bin/llvm-lit -sv llvm/test/tools/llvm-gsymutil/X86/elf-symtab.yaml
```
---
.../llvm-gsymutil/X86/elf-dwarf-only.yaml | 689 ++++++++++++++++++
.../tools/llvm-gsymutil/X86/elf-symtab.yaml | 654 +++++++++++++++++
llvm/tools/llvm-gsymutil/Opts.td | 3 +
llvm/tools/llvm-gsymutil/llvm-gsymutil.cpp | 48 +-
4 files changed, 1391 insertions(+), 3 deletions(-)
create mode 100644 llvm/test/tools/llvm-gsymutil/X86/elf-dwarf-only.yaml
create mode 100644 llvm/test/tools/llvm-gsymutil/X86/elf-symtab.yaml
diff --git a/llvm/test/tools/llvm-gsymutil/X86/elf-dwarf-only.yaml b/llvm/test/tools/llvm-gsymutil/X86/elf-dwarf-only.yaml
new file mode 100644
index 000000000000000..31d6ce4183aabc9
--- /dev/null
+++ b/llvm/test/tools/llvm-gsymutil/X86/elf-dwarf-only.yaml
@@ -0,0 +1,689 @@
+## Test loading ELF files with only DWARF.
+## First we make the ELF file from yaml,
+## then we convert the ELF file to GSYM,
+## then we do lookups on the newly created .gsym
+
+# RUN: yaml2obj %s -o %t
+# RUN: llvm-gsymutil --convert %t -o %t.gsym 2>&1 | FileCheck %s --check-prefix=CONVERT
+# RUN: llvm-gsymutil --address 0x00000000004011e0 %t.gsym | FileCheck %s --check-prefix=LOOKUP
+
+# CONVERT: Input file: {{.*\.yaml\.tmp}}
+# CONVERT: Output file (x86_64): {{.*\.yaml\.tmp\.gsym}}
+# CONVERT: Loaded 2 functions from DWARF.
+# CONVERT: Loaded 0 functions from symbol table.
+# CONVERT: Pruned 0 functions, ended with 2 total
+
+# LOOKUP: Looking up addresses in "{{.*\.yaml\.tmp\.gsym}}":
+# LOOKUP: 0x00000000004011e0: main @ /tmp/test_gsymutil/main.cpp
+
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+Symbols:
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+ Index: SHN_ABS
+DynamicSymbols:
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+ Type: STT_FUNC
+ Binding: STB_GLOBAL
+ - Name: __cxa_atexit
+ Type: STT_FUNC
+ Binding: STB_GLOBAL
+ - Name: _ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc
+ Type: STT_FUNC
+ Binding: STB_GLOBAL
+ - Name: _ZNSolsEPFRSoS_E
+ Type: STT_FUNC
+ Binding: STB_GLOBAL
+ - Name: _ZNSt8ios_base4InitC1Ev
+ Type: STT_FUNC
+ Binding: STB_GLOBAL
+ - Name: _ITM_deregisterTMCloneTable
+ Binding: STB_WEAK
+ - Name: __gmon_start__
+ Binding: STB_WEAK
+ - Name: _ITM_registerTMCloneTable
+ Binding: STB_WEAK
+ - Name: _ZNSt8ios_base4InitD1Ev
+ Type: STT_FUNC
+ Binding: STB_GLOBAL
+ - Name: _ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_
+ Type: STT_FUNC
+ Binding: STB_GLOBAL
+ Value: 0x401030
+ - Name: _ZSt4cout
+ Type: STT_OBJECT
+ Section: .bss
+ Binding: STB_GLOBAL
+ Value: 0x404040
+ Size: 0x110
+DWARF:
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+ - main.cpp
+ - '/tmp/test_gsymutil'
+ - __ARRAY_SIZE_TYPE__
+ - std
+ - __count
+ - __value
+ - __wch
+ - unsigned int
+ - __wchb
+ - __mbstate_t
+ - wint_t
+ - fgetwc
+ - _IO_FILE
+ - __FILE
+ - fgetws
+ - wchar_t
+ - fputwc
+ - fputws
+ - fwide
+ - __isoc99_fwscanf
+ - getwchar
+ - mbrlen
+ - unsigned long
+ - size_t
+ - mbrtowc
+ - mbsinit
+ - mbsrtowcs
+ - putwchar
+ - __isoc99_swscanf
+ - ungetwc
+ - vfwprintf
+ - gp_offset
+ - fp_offset
+ - overflow_arg_area
+ - reg_save_area
+ - __va_list_tag
+ - __isoc99_vfwscanf
+ - vswprintf
+ - __isoc99_vswscanf
+ - vwprintf
+ - __isoc99_vwscanf
+ - wcrtomb
+ - wcscat
+ - wcscmp
+ - wcscoll
+ - wcscpy
+ - wcscspn
+ - wcsftime
+ - tm
+ - wcslen
+ - wcsncat
+ - wcsncmp
+ - wcsncpy
+ - wcsrtombs
+ - wcsspn
+ - wcstod
+ - wcstof
+ - float
+ - wcstok
+ - wcstol
+ - wcstoul
+ - wcsxfrm
+ - wctob
+ - wmemcmp
+ - wmemcpy
+ - wmemmove
+ - wmemset
+ - __isoc99_wscanf
+ - wcschr
+ - wcspbrk
+ - wcsrchr
+ - wcsstr
+ - wmemchr
+ - __gnu_cxx
+ - wcstold
+ - long double
+ - wcstoll
+ - wcstoull
+ - unsigned long long
+ - __exception_ptr
+ - _ZSt17rethrow_exceptionNSt15__exception_ptr13exception_ptrE
+ - rethrow_exception
+ - _ZNSt15__exception_ptr4swapERNS_13exception_ptrES1_
+ - swap
+ - lconv
+ - setlocale
+ - localeconv
+ - isalnum
+ - isalpha
+ - iscntrl
+ - isdigit
+ - isgraph
+ - islower
+ - isprint
+ - ispunct
+ - isspace
+ - isupper
+ - isxdigit
+ - tolower
+ - toupper
+ - isblank
+ - __gnu_debug
+ - __debug
+ - quot
+ - rem
+ - abort
+ - aligned_alloc
+ - atexit
+ - at_quick_exit
+ - atof
+ - atoi
+ - atol
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+ - __compar_fn_t
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+ - free
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+ - mbstowcs
+ - mbtowc
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+ - vprintf
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+ - __isoc99_vscanf
+ - vsnprintf
+ - __isoc99_vsscanf
+ - __clang_max_align_nonce1
+ - __clang_max_align_nonce2
+ - max_align_t
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diff --git a/llvm/test/tools/llvm-gsymutil/X86/elf-symtab.yaml b/llvm/test/tools/llvm-gsymutil/X86/elf-symtab.yaml
new file mode 100644
index 000000000000000..31a05ce07547a10
--- /dev/null
+++ b/llvm/test/tools/llvm-gsymutil/X86/elf-symtab.yaml
@@ -0,0 +1,654 @@
+## Test loading ELF files with only symbol table and only DWARF.
+## First we make the ELF files from yaml, then we convert the ELF files to GSYM
+## and perform lookups on the newly created GSYM
+## Notice the second lookup will have more info as we included DWARF
+
+# RUN: yaml2obj %s -o %t
+# RUN: yaml2obj %p/elf-dwarf-only.yaml -o elf-dwarf-only.yaml.tmp
+# RUN: llvm-gsymutil --convert %t -o %t.gsym 2>&1 | FileCheck %s --check-prefix=CONVERT
+# RUN: llvm-gsymutil --convert elf-dwarf-only.yaml.tmp --symtab-file %t 2>&1 | FileCheck %s --check-prefix=CONVERT1
+# RUN: llvm-gsymutil --address 0x00000000004011e0 %t.gsym | FileCheck %s --check-prefix=LOOKUP
+# RUN: llvm-gsymutil --address 0x00000000004011e0 elf-dwarf-only.yaml.tmp.gsym | FileCheck %s --check-prefix=LOOKUP1
+
+# CONVERT: Input file: {{.*\.yaml\.tmp}}
+# CONVERT: Output file (x86_64): {{.*\.yaml\.tmp\.gsym}}
+# CONVERT: Loaded 0 functions from DWARF.
+# CONVERT: Loaded 12 functions from symbol table.
+# CONVERT: Pruned 0 functions, ended with 12 total
+
+# CONVERT1: Input file: {{.*\.yaml\.tmp}}
+# CONVERT1: Output file (x86_64): {{.*\.yaml\.tmp\.gsym}}
+# CONVERT1: Loaded 2 functions from DWARF.
+# CONVERT1: Using symbol table file: {{.*\.yaml\.tmp}}
+# CONVERT1: Loaded 12 functions from symbol table.
+# CONVERT1: Pruned 2 functions, ended with 12 total
+
+# LOOKUP: Looking up addresses in "{{.*\.yaml\.tmp\.gsym}}":
+# LOOKUP: 0x00000000004011e0: main
+
+# LOOKUP1: Looking up addresses in "{{.*\.yaml\.tmp\.gsym}}":
+# LOOKUP1: 0x00000000004011e0: main @ /tmp/test_gsymutil/main.cpp
+
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+FileHeader:
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+ Section: .data
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+ Section: .data
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+ Section: .bss
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+ Type: STT_FUNC
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+ - Name: '_ZNSt8ios_base4InitC1Ev at GLIBCXX_3.4'
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+ Type: STT_FUNC
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diff --git a/llvm/tools/llvm-gsymutil/Opts.td b/llvm/tools/llvm-gsymutil/Opts.td
index 740291479f93232..ea67a940c56e23a 100644
--- a/llvm/tools/llvm-gsymutil/Opts.td
+++ b/llvm/tools/llvm-gsymutil/Opts.td
@@ -35,3 +35,6 @@ defm address : Eq<"address", "Lookup an address in a GSYM file">;
def addresses_from_stdin :
FF<"addresses-from-stdin",
"Lookup addresses in a GSYM file that are read from stdin\nEach input line is expected to be of the following format: <addr> <gsym-path>">;
+defm symtab_file :
+ Eq<"symtab-file",
+ "Specify a separate file for symbol table to GSYM conversion.\nIn case the symbol table and debug info are not in the same binary. Does not support universal binary.">;
diff --git a/llvm/tools/llvm-gsymutil/llvm-gsymutil.cpp b/llvm/tools/llvm-gsymutil/llvm-gsymutil.cpp
index e5ae726546d4e44..07d3a2f63384f00 100644
--- a/llvm/tools/llvm-gsymutil/llvm-gsymutil.cpp
+++ b/llvm/tools/llvm-gsymutil/llvm-gsymutil.cpp
@@ -92,6 +92,7 @@ static uint64_t SegmentSize;
static bool Quiet;
static std::vector<uint64_t> LookupAddresses;
static bool LookupAddressesFromStdin;
+static std::string SymbolTableFilename;
static void parseArgs(int argc, char **argv) {
GSYMUtilOptTable Tbl;
@@ -110,8 +111,9 @@ static void parseArgs(int argc, char **argv) {
"information in each GSYM file.\n"
"Specify a single GSYM file along with one or more --lookup options to "
"lookup addresses within that GSYM file.\n"
- "Use the --convert option to specify a file with option --out-file "
- "option to convert to GSYM format.\n";
+ "Use the --convert option to specify a file (with --symtab-file if "
+ "needed) "
+ "with option --out-file option to convert to GSYM format.\n";
Tbl.printHelp(llvm::outs(), "llvm-gsymutil [options] <input GSYM files>",
Overview);
@@ -169,6 +171,9 @@ static void parseArgs(int argc, char **argv) {
}
LookupAddressesFromStdin = Args.hasArg(OPT_addresses_from_stdin);
+
+ if (const llvm::opt::Arg *A = Args.getLastArg(OPT_symtab_file_EQ))
+ SymbolTableFilename = A->getValue();
}
/// @}
@@ -358,7 +363,38 @@ static llvm::Error handleObjectFile(ObjectFile &Obj,
return Err;
// Get the UUID and convert symbol table to GSYM.
- if (auto Err = ObjectFileTransformer::convert(Obj, LogOS, Gsym))
+ // Use a separate file for symbol table if specified
+ std::string SymtabFile = SymbolTableFilename;
+ ErrorOr<std::unique_ptr<MemoryBuffer>> SymtabBuffOrErr = nullptr;
+ std::unique_ptr<MemoryBuffer> SymtabBuffer = nullptr;
+ if (!SymtabFile.empty()) {
+ outs() << "Using symbol table file: " << SymbolTableFilename << "\n";
+ SymtabBuffOrErr = MemoryBuffer::getFileOrSTDIN(SymtabFile);
+ error(SymtabFile, SymtabBuffOrErr.getError());
+ SymtabBuffer = std::move(SymtabBuffOrErr.get());
+ Expected<std::unique_ptr<Binary>> SymtabBinOrErr =
+ object::createBinary(*SymtabBuffer);
+ error(SymtabFile, errorToErrorCode(SymtabBinOrErr.takeError()));
+ if (auto Symtab = dyn_cast<ObjectFile>(SymtabBinOrErr->get())) {
+ Triple ObjTriple(Obj.makeTriple());
+ Triple SymtabTriple(Symtab->makeTriple());
+ if (ObjTriple.getArchName() != SymtabTriple.getArchName())
+ return createStringError(std::errc::invalid_argument,
+ "Cannot use symbol table file %s in %s for "
+ "binary in %s architecture.",
+ SymtabFile.c_str(),
+ ObjTriple.getArchName().data(),
+ SymtabTriple.getArchName().data());
+ if (auto Err = ObjectFileTransformer::convert(*Symtab, LogOS, Gsym))
+ return Err;
+ } else
+ return createStringError(std::errc::invalid_argument,
+ "Input symbol table file %s is not a "
+ "valid object file.\n"
+ "Supported files are ELF and mach-o "
+ "(exclude universal binary) files.",
+ SymtabFile.c_str());
+ } else if (auto Err = ObjectFileTransformer::convert(Obj, LogOS, Gsym))
return Err;
// Finalize the GSYM to make it ready to save to disk. This will remove
@@ -400,6 +436,12 @@ static llvm::Error handleBuffer(StringRef Filename, MemoryBufferRef Buffer,
if (auto Err = handleObjectFile(*Obj, OutFile))
return Err;
} else if (auto *Fat = dyn_cast<MachOUniversalBinary>(BinOrErr->get())) {
+ // Symbol table file is not accepted with universal binary
+ std::string SymtabFile = SymbolTableFilename;
+ if (!SymtabFile.empty())
+ return createStringError(std::errc::invalid_argument,
+ "--symtab-file is not accepted for "
+ "universal binary conversion");
// Iterate over all contained architectures and filter out any that were
// not specified with the "--arch <arch>" option. If the --arch option was
// not specified on the command line, we will process all architectures.
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