I can't get function name with dwarf_decode_address.py

[LeeGoodThing]

I did build C++ code with clang in Linux.
My binary is DIE tag is only DW_TAG_compile_unit.
So, Only return 'None' data when called decode_funcname() function.
Am I miss something?

[sevaa]

What are the clang command line options?

[LeeGoodThing]

What are the clang command line options?

Here. This is the v8 engine build options of Google.

clang++ -MMD -MF obj/cppgc_base/concurrent-marker.o.d -DDCHECK_ALWAYS_ON=1 -DUSE_UDEV -DUSE_AURA=1 -DUSE_GLIB=1 -DUSE_OZONE=1 -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_GNU_SOURCE -DCR_CLANG_REVISION=\"llvmorg-16-init-6084-g2f3d7c2c-1\" -D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS -D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS -DCR_LIBCXX_REVISION=2a919977e0040ce61bd19c40cefe31b995f1e2d4 -DCR_SYSROOT_HASH=393193b824af4cfcdafb53cb47bc2023740f4995 -D_DEBUG -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DCPPGC_VERIFY_HEAP -DENABLE_DISASSEMBLER -DV8_TYPED_ARRAY_MAX_SIZE_IN_HEAP=64 -DENABLE_GDB_JIT_INTERFACE -DOBJECT_PRINT -DVERIFY_HEAP -DV8_TRACE_MAPS -DENABLE_HANDLE_ZAPPING -DV8_CODE_COMMENTS -DV8_ENABLE_DEBUG_CODE -DV8_ENABLE_HEAP_SNAPSHOT_VERIFY -DV8_SNAPSHOT_NATIVE_CODE_COUNTERS -DV8_ATOMIC_OBJECT_FIELD_WRITES -DV8_ENABLE_LAZY_SOURCE_POSITIONS -DV8_SHARED_RO_HEAP -DV8_WIN64_UNWINDING_INFO -DV8_ENABLE_REGEXP_INTERPRETER_THREADED_DISPATCH -DV8_SHORT_BUILTIN_CALLS -DV8_EXTERNAL_CODE_SPACE -DV8_ENABLE_MAGLEV -DV8_ENABLE_WEBASSEMBLY -DV8_ALLOCATION_FOLDING -DV8_ALLOCATION_SITE_TRACKING -DV8_ADVANCED_BIGINT_ALGORITHMS -DV8_USE_ZLIB -DV8_ENABLE_CHECKS -DV8_COMPRESS_POINTERS -DV8_COMPRESS_POINTERS_IN_SHARED_CAGE -DV8_31BIT_SMIS_ON_64BIT_ARCH -DV8_ENABLE_SANDBOX -DV8_DEPRECATION_WARNINGS -DV8_IMMINENT_DEPRECATION_WARNINGS -DCPPGC_CAGED_HEAP -DCPPGC_YOUNG_GENERATION -DCPPGC_POINTER_COMPRESSION -DV8_TARGET_ARCH_X64 -DV8_HAVE_TARGET_OS -DV8_TARGET_OS_LINUX -DDEBUG -DV8_RUNTIME_CALL_STATS -I.. -Igen -I../buildtools/third_party/libc++ -I../include -Igen/include -Wall -Wextra -Wimplicit-fallthrough -Wextra-semi -Wunreachable-code-aggressive -Wthread-safety -Wno-missing-field-initializers -Wno-unused-parameter -Wloop-analysis -Wno-unneeded-internal-declaration -Wenum-compare-conditional -Wno-psabi -Wno-ignored-pragma-optimize -Wno-deprecated-builtins -Wno-bitfield-constant-conversion -Wshadow -fno-delete-null-pointer-checks -fno-ident -fno-strict-aliasing --param=ssp-buffer-size=4 -fstack-protector -funwind-tables -fPIC -pthread -fcolor-diagnostics -fmerge-all-constants -fcrash-diagnostics-dir=../tools/clang/crashreports -mllvm -instcombine-lower-dbg-declare=0 -ffp-contract=off -fcomplete-member-pointers -m64 -msse3 -Wno-builtin-macro-redefined -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -ffile-compilation-dir=. -no-canonical-prefixes -ftrivial-auto-var-init=pattern -fno-omit-frame-pointer -gdwarf-4 -g2 -gdwarf-aranges -gsplit-dwarf -ggnu-pubnames -Xclang -fuse-ctor-homing -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -g -O3 -w -fno-inline-functions -fno-inline -Wmissing-field-initializers -Wunreachable-code -Wctad-maybe-unsupported -Wno-shadow -Wshorten-64-to-32 -fdata-sections -ffunction-sections -fno-unique-section-names -fvisibility=default -Wexit-time-destructors -Wno-undefined-bool-conversion -Wno-tautological-undefined-compare -std=c++17 -Wno-trigraphs -fno-exceptions -fno-rtti -nostdinc++ -isystem../buildtools/third_party/libc++/trunk/include -isystem../buildtools/third_party/libc++abi/trunk/include --sysroot=../build/linux/debian_bullseye_amd64-sysroot -c ../src/heap/cppgc/concurrent-marker.cc -o obj/cppgc_base/concurrent-marker.o

[sevaa]

Isn't the purpose of -gsplit-dwarf to offload most of the DWARF info from the executable? The fact that there is nothing but DW_TAG_compile_unit in the executable (I presume that's what you are looking at) seems consistent with that.

[sevaa]

@LeeGoodThing is this still an issue?