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Code Issues Actions 4 Packages Projects Releases Wiki Activity

addr2line.py: Support sourceMappingURL section produced by emcc (#3302)

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And update the debug-tools sample.
This commit is contained in:
liang.he 2024-04-12 11:43:40 +08:00 committed by GitHub
parent 1a043b6eb5
commit fef26ead3e
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10 changed files with 324 additions and 110 deletions
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4
.github/workflows/compilation_on_android_ubuntu.yml vendored
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@ -389,14 +389,14 @@ jobs:
cd /opt
sudo wget ${{ matrix.wasi_sdk_release }}
sudo tar -xzf wasi-sdk-*.tar.gz
sudo mv wasi-sdk-20.0 wasi-sdk
sudo ln -sf wasi-sdk-20.0 wasi-sdk
- name: download and install wabt
run: |
cd /opt
sudo wget ${{ matrix.wabt_release }}
sudo tar -xzf wabt-1.0.31-*.tar.gz
sudo mv wabt-1.0.31 wabt
sudo ln -sf wabt-1.0.31 wabt
- name: Get LLVM libraries
id: retrieve_llvm_libs
uses: actions/cache@v4

8
.github/workflows/compilation_on_macos.yml vendored
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@ -273,14 +273,14 @@ jobs:
cd /opt
sudo wget ${{ matrix.wasi_sdk_release }}
sudo tar -xzf wasi-sdk-*.tar.gz
sudo mv wasi-sdk-20.0 wasi-sdk
sudo ln -sf wasi-sdk-20.0 wasi-sdk
- name: download and install wabt
run: |
cd /opt
sudo wget ${{ matrix.wabt_release }}
sudo tar -xzf wabt-1.0.31-*.tar.gz
sudo mv wabt-1.0.31 wabt
sudo ln -sf wabt-1.0.31 wabt
- name: Build Sample [basic]
run: |
@ -346,7 +346,7 @@ jobs:
cmake ..
cmake --build . --config Release --parallel 4
working-directory: wamr-compiler
- name: Build Sample [wasi-threads]
run: |
cd samples/wasi-threads
@ -378,4 +378,4 @@ jobs:
cmake --build . --config Debug --parallel 4
./iwasm wasm-apps/trap.wasm | grep "#" > call_stack.txt
./iwasm wasm-apps/trap.aot | grep "#" > call_stack_aot.txt
bash -x ../symbolicate.sh
bash -x ../symbolicate.sh

12
.github/workflows/nightly_run.yml vendored
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@ -8,7 +8,7 @@ on:
types:
- opened
- synchronize
# running nightly pipeline if you're changing it
# running nightly pipeline if you're changing it
# stress tests are run only in nightly at the moment, so running them in they are changed
paths:
- ".github/workflows/nightly_run.yml"
@ -54,7 +54,7 @@ jobs:
with:
os: "ubuntu-22.04"
arch: "X86"
build_wamrc:
needs:
[
@ -65,7 +65,7 @@ jobs:
matrix:
include:
- os: ubuntu-20.04
llvm_cache_key: ${{ needs.build_llvm_libraries_on_ubuntu_2004.outputs.cache_key }}
llvm_cache_key: ${{ needs.build_llvm_libraries_on_ubuntu_2004.outputs.cache_key }}
steps:
- name: checkout
uses: actions/checkout@v4
@ -459,13 +459,13 @@ jobs:
cd /opt
sudo wget ${{ matrix.wasi_sdk_release }}
sudo tar -xzf wasi-sdk-*.tar.gz
sudo mv wasi-sdk-20.0 wasi-sdk
sudo ln -sf wasi-sdk-20.0 wasi-sdk
- name: download and install wabt
run: |
cd /opt
sudo wget ${{ matrix.wabt_release }}
sudo tar -xzf wabt-1.0.31-*.tar.gz
sudo mv wabt-1.0.31 wabt
sudo ln -sf wabt-1.0.31 wabt
- name: Get LLVM libraries
id: retrieve_llvm_libs
@ -643,7 +643,7 @@ jobs:
sudo tar -xzf wasi-sdk-*.tar.gz
sudo mv wasi-sdk-20.0 wasi-sdk
# It is a temporary solution until new wasi-sdk that includes bug fixes is released
# It is a temporary solution until new wasi-sdk that includes bug fixes is released
- name: build wasi-libc from source
if: matrix.test_option == '$WASI_TEST_OPTIONS'
run: |

33
samples/debug-tools/CMakeLists.txt
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@ -7,6 +7,14 @@ include(CheckPIESupported)
project(debug_tools_sample)
list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
find_package(WASISDK REQUIRED)
option(SOURCE_MAP_DEMO "Enable source map demo" OFF)
if (SOURCE_MAP_DEMO)
find_package(EMSCRIPTEN 3.1.50 REQUIRED)
endif ()
################ runtime settings ################
string (TOLOWER ${CMAKE_HOST_SYSTEM_NAME} WAMR_BUILD_PLATFORM)
if (APPLE)
@ -61,7 +69,30 @@ include (${WAMR_ROOT_DIR}/build-scripts/runtime_lib.cmake)
add_library(vmlib ${WAMR_RUNTIME_LIB_SOURCE})
################ wasm application ################
add_subdirectory(wasm-apps)
include(ExternalProject)
# wasm32-wasi
ExternalProject_Add(wasm33-wasi
SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/wasm-apps"
CONFIGURE_COMMAND ${CMAKE_COMMAND} -S ${CMAKE_CURRENT_SOURCE_DIR}/wasm-apps -B build
-DWASI_SDK_PREFIX=${WASISDK_HOME}
-DCMAKE_TOOLCHAIN_FILE=${WASISDK_TOOLCHAIN}
BUILD_COMMAND ${CMAKE_COMMAND} --build build
INSTALL_COMMAND ${CMAKE_COMMAND} --install build --prefix ${CMAKE_CURRENT_BINARY_DIR}
)
if (EMSCRIPTEN_FOUND)
# wasm32-emscripten
ExternalProject_Add(wasm32-emscripten
SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/wasm-apps"
CONFIGURE_COMMAND ${CMAKE_COMMAND} -S ${CMAKE_CURRENT_SOURCE_DIR}/wasm-apps -B build
-DCMAKE_TOOLCHAIN_FILE=${EMSCRIPTEN_TOOLCHAIN}
-DCMAKE_VERBOSE_MAKEFILE=On
-DSOURCE_MAP_DEMO=On
BUILD_COMMAND ${CMAKE_COMMAND} --build build
INSTALL_COMMAND ${CMAKE_COMMAND} --install build --prefix ${CMAKE_CURRENT_BINARY_DIR}/emscripten
)
endif ()
################ wamr runtime ################
include (${SHARED_DIR}/utils/uncommon/shared_uncommon.cmake)

35
samples/debug-tools/README.md
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@ -80,6 +80,39 @@ $ python3 ../../../test-tools/addr2line/addr2line.py \
call_stack.txt --no-addr
```
#### sourcemap
This script also supports _sourcemap_ which is produced by [_emscripten_](https://emscripten.org/docs/tools_reference/emcc.html). The _sourcemap_ is used to map the wasm function to the original source file. To use it, add `-gsource-map` option to _emcc_ command line. The output should be a section named "sourceMappingURL" and a separated file named "_.map_.
If the wasm file is with _sourcemap_, the script will use it to get the source file and line info. It needs an extra command line option `--emsdk` to specify the path of _emsdk_. The script will use _emsymbolizer_ to query the source file and line info.
````bash
$ python3 ../../../test-tools/addr2line/addr2line.py \
--wasi-sdk /opt/wasi-sdk \
--wabt /opt/wabt \
--wasm-file emscripten/wasm-apps/trap.wasm \
--emsdk /opt/emsdk \
call_stack.from_wasm_w_sourcemap.txt
The output should be something like:
```text
1: c
at ../../../../../wasm-apps/trap.c:5:1
2: b
at ../../../../../wasm-apps/trap.c:11:12
3: a
at ../../../../../wasm-apps/trap.c:17:12
4: main
at ../../../../../wasm-apps/trap.c:24:5
5: __main_void
at ../../../../../../../../../emsdk/emscripten/system/lib/standalone/__main_void.c:53:10
6: _start
at ../../../../../../../../../emsdk/emscripten/system/lib/libc/crt1.c:27:3
````
> The script assume the separated map file _.map_ is in the same directory as the wasm file.
### Another approach
If the wasm file is with "name" section, it is able to output function name in the stack trace. To achieve that, need to enable `WAMR_BUILD_LOAD_CUSTOM_SECTION` and `WAMR_BUILD_CUSTOM_NAME_SECTION`. If using .aot file, need to add `--emit-custom-sections=name` into wamrc command line options.
@ -97,4 +130,4 @@ Then the output should be something like
Exception: unreachable
```
Also, it is able to use *addr2line.py* to add file and line info to the stack trace.
Also, it is able to use _addr2line.py_ to add file and line info to the stack trace.

45
samples/debug-tools/cmake/FindEMSCRIPTEN.cmake Normal file
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@ -0,0 +1,45 @@
# Copyright (C) 2019 Intel Corporation. All rights reserved.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
include(FindPackageHandleStandardArgs)
find_path(EMSCRIPTEN_HOME
NAMES upstream/emscripten
PATHS /opt/emsdk
NO_DEFAULT_PATH
NO_CMAKE_PATH
NO_CMAKE_SYSTEM_PATH
NO_CMAKE_FIND_ROOT_PATH
REQUIRED
)
find_file(EMSCRIPTEN_VERSION_FILE
NAMES emscripten-version.txt
PATHS ${EMSCRIPTEN_HOME}/upstream/emscripten
NO_DEFAULT_PATH
NO_CMAKE_PATH
NO_CMAKE_SYSTEM_PATH
NO_CMAKE_FIND_ROOT_PATH
REQUIRED
)
file(READ ${EMSCRIPTEN_VERSION_FILE} EMSCRIPTEN_VERSION_FILE_CONTENT)
string(REGEX
MATCH
"[0-9]+\.[0-9]+(\.[0-9]+)*"
EMSCRIPTEN_VERSION
${EMSCRIPTEN_VERSION_FILE_CONTENT}
)
find_package_handle_standard_args(EMSCRIPTEN
REQUIRED_VARS EMSCRIPTEN_HOME
VERSION_VAR EMSCRIPTEN_VERSION
HANDLE_VERSION_RANGE
)
if(EMSCRIPTEN_FOUND)
set(EMSCRIPTEN_TOOLCHAIN ${EMSCRIPTEN_HOME}/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake)
set(EMCC ${EMSCRIPTEN_HOME}/upstream/emscripten/emcc)
endif()
mark_as_advanced(EMSCRIPTEN_TOOLCHAIN EMCC)

27
samples/debug-tools/cmake/FindWAMRC.cmake Normal file
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@ -0,0 +1,27 @@
# Copyright (C) 2019 Intel Corporation. All rights reserved.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
include(FindPackageHandleStandardArgs)
find_path(WAMRC_HOME
wamr-compiler
PATHS ${CMAKE_CURRENT_SOURCE_DIR}/../../..
NO_DEFAULT_PATH
NO_CMAKE_PATH
NO_CMAKE_SYSTEM_PATH
NO_CMAKE_FIND_ROOT_PATH
REQUIRED
)
find_file(WAMRC_BIN
wamrc
HINTS ${WAMRC_HOME}/wamr-compiler/build
NO_DEFAULT_PATH
NO_CMAKE_PATH
NO_CMAKE_SYSTEM_PATH
NO_CMAKE_FIND_ROOT_PATH
REQUIRED
)
find_package_handle_standard_args(WAMRC REQUIRED_VARS WAMRC_BIN)
mark_as_advanced(WAMRC_BIN)

24
samples/debug-tools/cmake/FindWASISDK.cmake Normal file
View File

@ -0,0 +1,24 @@
# Copyright (C) 2019 Intel Corporation. All rights reserved.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
include(FindPackageHandleStandardArgs)
file(GLOB WASISDK_SEARCH_PATH "/opt/wasi-sdk-*")
find_path(WASISDK_HOME
NAMES share/wasi-sysroot
PATHS ${WASISDK_SEARCH_PATH}
NO_DEFAULT_PATH
REQUIRED
)
string(REGEX MATCH [0-9]+\.[0-9]+\.*[0-9]* WASISDK_VERSION ${WASISDK_HOME})
find_package_handle_standard_args(WASISDK REQUIRED_VARS WASISDK_HOME VERSION_VAR WASISDK_VERSION)
if(WASISDK_FOUND)
set(WASISDK_CC_COMMAND ${WASISDK_HOME}/bin/clang)
set(WASISDK_CXX_COMMAND ${WASISDK_HOME}/bin/clang++)
set(WASISDK_TOOLCHAIN ${WASISDK_HOME}/share/cmake/wasi-sdk.cmake)
set(WASISDK_SYSROOT ${WASISDK_HOME}/share/wasi-sysroot)
endif()
mark_as_advanced(WASISDK_CC_COMMAND WASISDK_CXX_COMMAND WASISDK_TOOLCHAIN WASISDK_SYSROOT WASISDK_HOME)

121
samples/debug-tools/wasm-apps/CMakeLists.txt
View File

@ -1,91 +1,58 @@
# Copyright (C) 2024 Amazon.com, Inc. or its affiliates. All Rights Reserved.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
if (APPLE)
set (HAVE_FLAG_SEARCH_PATHS_FIRST 0)
set (CMAKE_C_LINK_FLAGS "")
set (CMAKE_CXX_LINK_FLAGS "")
cmake_minimum_required (VERSION 3.14)
project (debut_tools_wasm)
set (CMAKE_BUILD_TYPE Debug) # Otherwise no debug symbols (addr2line)
list (APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_LIST_DIR}/../cmake)
find_package (WAMRC REQUIRED)
option(SOURCE_MAP_DEMO "Enable source map demo" OFF)
if (SOURCE_MAP_DEMO)
find_package(EMSCRIPTEN 3.1.50 REQUIRED)
endif ()
if (NOT DEFINED WASI_SDK_DIR)
set (WASI_SDK_DIR "/opt/wasi-sdk")
endif ()
if (DEFINED WASI_SYSROOT)
set (CMAKE_SYSROOT "${WASI_SYSROOT}")
endif ()
set (CMAKE_C_COMPILER "${WASI_SDK_DIR}/bin/clang")
set (CMAKE_ASM_COMPILER "${WASI_SDK_DIR}/bin/clang")
set (CMAKE_EXE_LINKER_FLAGS "-target wasm32-wasi")
################ wabt and wamrc dependencies ################
message(CHECK_START "Detecting WABT")
if(NOT (DEFINED WABT_DIR OR DEFINED CACHE{WABT_DIR}))
find_path(WABT_DIR
wabt
PATHS /opt
NO_DEFAULT_PATH
NO_CMAKE_FIND_ROOT_PATH
)
if(DEFINED WABT_DIR)
set(WABT_DIR ${WABT_DIR}/wabt)
endif()
endif()
if(WABT_DIR)
message(CHECK_PASS "found")
else()
message(CHECK_FAIL "not found")
endif()
message(CHECK_START "Detecting WASM_OBJDUMP at ${WABT_DIR}")
find_program(WASM_OBJDUMP
wasm-objdump
PATHS "${WABT_DIR}/bin"
NO_DEFAULT_PATH
NO_CMAKE_FIND_ROOT_PATH
)
if(WASM_OBJDUMP)
message(CHECK_PASS "found")
else()
message(CHECK_FAIL "not found")
endif()
if((NOT EXISTS ${WASM_OBJDUMP}) )
message(FATAL_ERROR "Please make sure to have wasm-objdump under the path=${WABT_DIR}/bin ")
endif()
set(WAMR_COMPILER_DIR ${CMAKE_CURRENT_LIST_DIR}/../../wamr-compiler/build)
message(CHECK_START "Detecting WAMR_COMPILER at ${WAMR_COMPILER_DIR}")
find_file(WAMR_COMPILER
wamrc
PATHS "${CMAKE_CURRENT_LIST_DIR}/../../../wamr-compiler/build"
NO_DEFAULT_PATH
NO_CMAKE_FIND_ROOT_PATH
)
if(WAMR_COMPILER)
message(CHECK_PASS "found")
else()
message(CHECK_FAIL "not found")
endif()
if((NOT EXISTS ${WAMR_COMPILER}) )
message(FATAL_ERROR "Please build wamrc under the path=${WAMR_ROOT_DIR}/wamr-compiler/")
endif()
################ wasm and aot compilation ################
function (compile_sample SOURCE_FILE)
get_filename_component (FILE_NAME ${SOURCE_FILE} NAME_WLE)
set (WASM_MODULE ${FILE_NAME}.wasm)
add_executable (${WASM_MODULE} ${SOURCE_FILE})
add_custom_target(
wasm_to_aot
## wasm
set (WASM_FILE ${FILE_NAME}.wasm)
add_executable (${FILE_NAME} ${SOURCE_FILE})
set_target_properties (${FILE_NAME} PROPERTIES SUFFIX .wasm)
## aot
set (AOT_FILE ${FILE_NAME}.aot)
add_custom_target (
${FILE_NAME}_aot
ALL
DEPENDS ${WAMR_COMPILER} ${WASM_MODULE}
DEPENDS ${WAMRC_BIN} ${WASM_FILE}
# Use --enable-dump-call-stack to generate stack trace (addr2line)
COMMAND ${WAMR_COMPILER} --size-level=0 --enable-dump-call-stack -o wasm-apps/trap.aot wasm-apps/trap.wasm
WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
COMMAND ${WAMRC_BIN} --size-level=0 --enable-dump-call-stack -o ${AOT_FILE} ${WASM_FILE}
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
)
## wasm + sourcemap
if (DEFINED EMSCRIPTEN)
add_custom_target(
${FILE_NAME}_w_sourcemap
ALL
DEPENDS ${SOURCE_FILE}
COMMAND ${EMCC} -O0 -gsource-map -o ${FILE_NAME}.sourcemap.wasm ${CMAKE_CURRENT_SOURCE_DIR}/${SOURCE_FILE}
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
)
endif ()
## install both
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${WASM_FILE} DESTINATION wasm-apps)
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${AOT_FILE} DESTINATION wasm-apps)
if (DEFINED EMSCRIPTEN)
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${FILE_NAME}.sourcemap.wasm DESTINATION wasm-apps)
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${FILE_NAME}.sourcemap.wasm.map DESTINATION wasm-apps)
endif ()
endfunction ()
set(CMAKE_BUILD_TYPE Debug) # Otherwise no debug symbols (addr2line)
compile_sample(trap.c)
compile_sample(trap.c)

125
test-tools/addr2line/addr2line.py
View File

@ -43,6 +43,28 @@ For example, there is a call-stack dump:
"""
def locate_sourceMappingURL_section(wasm_objdump: Path, wasm_file: Path) -> bool:
"""
Figure out if the wasm file has a sourceMappingURL section.
"""
cmd = f"{wasm_objdump} -h {wasm_file}"
p = subprocess.run(
shlex.split(cmd),
check=True,
capture_output=True,
text=True,
universal_newlines=True,
)
outputs = p.stdout.split(os.linesep)
for line in outputs:
line = line.strip()
if "sourceMappingURL" in line:
return True
return False
def get_code_section_start(wasm_objdump: Path, wasm_file: Path) -> int:
"""
Find the start offset of Code section in a wasm file.
@ -62,15 +84,6 @@ def get_code_section_start(wasm_objdump: Path, wasm_file: Path) -> int:
)
outputs = p.stdout.split(os.linesep)
# if there is no .debug section, return -1
for line in outputs:
line = line.strip()
if ".debug_info" in line:
break
else:
print(f"No .debug_info section found {wasm_file}")
return -1
for line in outputs:
line = line.strip()
if "Code" in line:
@ -79,7 +92,7 @@ def get_code_section_start(wasm_objdump: Path, wasm_file: Path) -> int:
return -1
def get_line_info_from_function_addr(
def get_line_info_from_function_addr_dwarf(
dwarf_dump: Path, wasm_file: Path, offset: int
) -> tuple[str, str, str, str]:
"""
@ -126,7 +139,7 @@ def get_dwarf_tag_value(tag: str, line: str) -> str:
return m.groups()[0]
def get_line_info_from_function_name(
def get_line_info_from_function_name_dwarf(
dwarf_dump: Path, wasm_file: Path, function_name: str
) -> tuple[str, str, str]:
"""
@ -160,6 +173,51 @@ def get_line_info_from_function_name(
return (function_name, function_file, function_line)
def get_line_info_from_function_addr_sourcemapping(
emsymbolizer: Path, wasm_file: Path, offset: int
) -> tuple[str, str, str, str]:
"""
Find the location info of a given offset in a wasm file which is compiled with emcc.
{emsymbolizer} {wasm_file} {offset of file}
there usually are two lines:
??
relative path to source file:line:column
"""
debug_info_source = wasm_file.with_name(f"{wasm_file.name}.map")
cmd = f"{emsymbolizer} -t code -f {debug_info_source} {wasm_file} {offset}"
p = subprocess.run(
shlex.split(cmd),
check=False,
capture_output=True,
text=True,
universal_newlines=True,
cwd=Path.cwd(),
)
outputs = p.stdout.split(os.linesep)
function_name, function_file = "<unknown>", "unknown"
function_line, function_column = "?", "?"
for line in outputs:
line = line.strip()
if not line:
continue
m = re.match("(.*):(\d+):(\d+)", line)
if m:
function_file, function_line, function_column = m.groups()
continue
else:
# it's always ??, not sure about that
if "??" != line:
function_name = line
return (function_name, function_file, function_line, function_column)
def parse_line_info(line_info: str) -> tuple[str, str, str]:
"""
line_info -> [file, line, column]
@ -250,6 +308,7 @@ def main():
action="store_true",
help="use call stack without addresses or from fast interpreter mode",
)
parser.add_argument("--emsdk", type=Path, help="path to emsdk")
args = parser.parse_args()
wasm_objdump = args.wabt.joinpath("bin/wasm-objdump")
@ -261,6 +320,15 @@ def main():
llvm_cxxfilt = args.wasi_sdk.joinpath("bin/llvm-cxxfilt")
assert llvm_cxxfilt.exists()
emcc_production = locate_sourceMappingURL_section(wasm_objdump, args.wasm_file)
if emcc_production:
if args.emsdk is None:
print("Please provide the path to emsdk via --emsdk")
return -1
emsymbolizer = args.emsdk.joinpath("upstream/emscripten/emsymbolizer")
assert emsymbolizer.exists()
code_section_start = get_code_section_start(wasm_objdump, args.wasm_file)
if code_section_start == -1:
return -1
@ -281,6 +349,7 @@ def main():
_, offset, index = splitted
if args.no_addr:
# FIXME: w/ emcc production
if not index.startswith("$f"): # E.g. _start or Text format
print(f"{i}: {index}")
continue
@ -290,22 +359,40 @@ def main():
print(f"{i}: {line}")
continue
line_info = get_line_info_from_function_name(
llvm_dwarf_dump, args.wasm_file, function_index_to_name[index]
)
if not emcc_production:
_, function_file, function_line = (
get_line_info_from_function_name_dwarf(
llvm_dwarf_dump,
args.wasm_file,
function_index_to_name[index],
)
)
else:
_, function_file, function_line = _, "unknown", "?"
_, function_file, function_line = line_info
function_name = demangle(llvm_cxxfilt, function_index_to_name[index])
print(f"{i}: {function_name}")
print(f"\tat {function_file}:{function_line}")
else:
offset = int(offset, 16)
# match the algorithm in wasm_interp_create_call_stack()
# either a *offset* to *code* section start
# or a *offset* in a file
assert offset > code_section_start
offset = offset - code_section_start
function_name, function_file, function_line, function_column = (
get_line_info_from_function_addr(
llvm_dwarf_dump, args.wasm_file, offset
if emcc_production:
function_name, function_file, function_line, function_column = (
get_line_info_from_function_addr_sourcemapping(
emsymbolizer, args.wasm_file, offset
)
)
else:
function_name, function_file, function_line, function_column = (
get_line_info_from_function_addr_dwarf(
llvm_dwarf_dump, args.wasm_file, offset
)
)
)
# if can't parse function_name, use name section or <index>
if function_name == "<unknown>":