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test(addr2line): add stack trace symbolication to CI
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# Copyright (C) 2024 Amazon.com, Inc. or its affiliates. All Rights Reserved. | ||
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||
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cmake_minimum_required(VERSION 3.14) | ||
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include(CheckPIESupported) | ||
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project(debug_tools_sample) | ||
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################ runtime settings ################ | ||
string (TOLOWER ${CMAKE_HOST_SYSTEM_NAME} WAMR_BUILD_PLATFORM) | ||
if (APPLE) | ||
add_definitions(-DBH_PLATFORM_DARWIN) | ||
endif () | ||
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# Resetdefault linker flags | ||
set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "") | ||
set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "") | ||
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# WAMR features switch | ||
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# Set WAMR_BUILD_TARGET, currently values supported: | ||
# "X86_64", "AMD_64", "X86_32", "AARCH64[sub]", "ARM[sub]", "THUMB[sub]", | ||
# "MIPS", "XTENSA", "RISCV64[sub]", "RISCV32[sub]" | ||
if (NOT DEFINED WAMR_BUILD_TARGET) | ||
if (CMAKE_SYSTEM_PROCESSOR MATCHES "^(arm64|aarch64)") | ||
set (WAMR_BUILD_TARGET "AARCH64") | ||
elseif (CMAKE_SYSTEM_PROCESSOR STREQUAL "riscv64") | ||
set (WAMR_BUILD_TARGET "RISCV64") | ||
elseif (CMAKE_SIZEOF_VOID_P EQUAL 8) | ||
# Build as X86_64 by default in 64-bit platform | ||
set (WAMR_BUILD_TARGET "X86_64") | ||
elseif (CMAKE_SIZEOF_VOID_P EQUAL 4) | ||
# Build as X86_32 by default in 32-bit platform | ||
set (WAMR_BUILD_TARGET "X86_32") | ||
else () | ||
message(SEND_ERROR "Unsupported build target platform!") | ||
endif () | ||
endif () | ||
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if (NOT CMAKE_BUILD_TYPE) | ||
set (CMAKE_BUILD_TYPE Release) | ||
endif () | ||
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set(WAMR_BUILD_INTERP 1) | ||
set(WAMR_BUILD_LIBC_WASI 1) | ||
set(WAMR_BUILD_FAST_INTERP 0) # Otherwise addresses don't match llvm-dwarfdump (addr2line) | ||
set(WAMR_BUILD_AOT 1) | ||
set(WAMR_BUILD_DUMP_CALL_STACK 1) # Otherwise stack trace is not printed (addr2line) | ||
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# compiling and linking flags | ||
if (NOT (CMAKE_C_COMPILER MATCHES ".*clang.*" OR CMAKE_C_COMPILER_ID MATCHES ".*Clang")) | ||
set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gc-sections") | ||
endif () | ||
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wformat -Wformat-security") | ||
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# build out vmlib | ||
set(WAMR_ROOT_DIR ${CMAKE_CURRENT_LIST_DIR}/../..) | ||
include (${WAMR_ROOT_DIR}/build-scripts/runtime_lib.cmake) | ||
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add_library(vmlib ${WAMR_RUNTIME_LIB_SOURCE}) | ||
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################ wasm application ################ | ||
add_subdirectory(wasm-apps) | ||
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################ wamr runtime ################ | ||
include (${SHARED_DIR}/utils/uncommon/shared_uncommon.cmake) | ||
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set (RUNTIME_SOURCE_ALL | ||
${CMAKE_CURRENT_LIST_DIR}/../../product-mini/platforms/linux/main.c | ||
${UNCOMMON_SHARED_SOURCE} | ||
) | ||
add_executable (iwasm ${RUNTIME_SOURCE_ALL}) | ||
check_pie_supported() | ||
set_target_properties (iwasm PROPERTIES POSITION_INDEPENDENT_CODE ON) | ||
target_link_libraries(iwasm vmlib -lm -ldl) |
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# "debug-tools" sample introduction | ||
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Tool to symoblicate stack traces. When using wasm in production, debug info are usually stripped using tools like `wasm-opt`, to decrease the binary size. If a corresponding unstripped wasm file is kept, location information (function, file, line, column) can be retrieved from the stripped stack trace. | ||
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## Build and run the sample | ||
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### Generate the stack trace | ||
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Build `iwasm` with `WAMR_BUILD_DUMP_CALL_STACK=1` and `WAMR_BUILD_FAST_INTERP=0` and the wasm file with debug info (e.g. `clang -g`). As it is done in [CMakeLists.txt](./CMakeLists.txt) and [wasm-apps/CMakeLists.txt](./wasm-apps/CMakeLists.txt) (look for `addr2line`): | ||
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```bash | ||
$ mkdir build && cd build | ||
$ cmake .. | ||
$ make | ||
$ ./iwasm wasm-apps/trap.wasm | ||
``` | ||
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The output should be something like | ||
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```text | ||
#00: 0x0159 - $f5 | ||
#01: 0x01b2 - $f6 | ||
#02: 0x0200 - $f7 | ||
#03: 0x026b - $f8 | ||
#04: 0x236b - $f15 | ||
#05: 0x011f - _start | ||
Exception: unreachable | ||
``` | ||
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Copy the stack trace printed to stdout into a separate file (`call_stack.txt`): | ||
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```bash | ||
$ ./iwasm wasm-apps/trap.wasm | grep "#" > call_stack.txt | ||
``` | ||
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Same for AOT. The AOT binary has to be generated using the `--enable-dump-call-stack` option of `wamrc`, as in [CMakeLists.txt](./wasm-apps/CMakeLists.txt). Then run: | ||
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```bash | ||
$ ./iwasm wasm-apps/trap.aot | grep "#" > call_stack.txt | ||
``` | ||
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### Symbolicate the stack trace | ||
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Run the [addr2line](../../test-tools/addr2line/addr2line.py) script to symbolicate the stack trace: | ||
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```bash | ||
$ python3 ../../../test-tools/addr2line/addr2line.py \ | ||
--wasi-sdk /opt/wasi-sdk \ | ||
--wabt /opt/wabt \ | ||
--wasm-file wasm-apps/trap.wasm \ | ||
call_stack.txt | ||
``` | ||
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The output should be something like: | ||
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```text | ||
0: c | ||
at wasm-micro-runtime/samples/debug-tools/wasm-apps/trap.c:5:1 | ||
1: b | ||
at wasm-micro-runtime/samples/debug-tools/wasm-apps/trap.c:11:12 | ||
2: a | ||
at wasm-micro-runtime/samples/debug-tools/wasm-apps/trap.c:17:12 | ||
3: main | ||
at wasm-micro-runtime/samples/debug-tools/wasm-apps/trap.c:24:5 | ||
4: <unknown> | ||
at unknown:?:? | ||
5: _start | ||
``` | ||
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If WAMR is run in fast interpreter mode (`WAMR_BUILD_FAST_INTERP=1`), addresses in the stack trace cannot be tracked back to location info. | ||
If WAMR <= `1.3.2` is used, the stack trace does not contain addresses. | ||
In those two cases, run the script with `--no-addr`: the line info returned refers to the start of the function | ||
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```bash | ||
$ python3 ../../../test-tools/addr2line/addr2line.py \ | ||
--wasi-sdk /opt/wasi-sdk \ | ||
--wabt /opt/wabt \ | ||
--wasm-file wasm-apps/trap.wasm \ | ||
call_stack.txt --no-addr | ||
``` |
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#!/bin/bash | ||
set -euox pipefail | ||
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# Symbolicate .wasm | ||
python3 ../../../test-tools/addr2line/addr2line.py \ | ||
--wasi-sdk /opt/wasi-sdk \ | ||
--wabt /opt/wabt \ | ||
--wasm-file wasm-apps/trap.wasm \ | ||
call_stack.txt | ||
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# Symbolicate .wasm with `--no-addr` | ||
python3 ../../../test-tools/addr2line/addr2line.py \ | ||
--wasi-sdk /opt/wasi-sdk \ | ||
--wabt /opt/wabt \ | ||
--wasm-file wasm-apps/trap.wasm \ | ||
call_stack.txt --no-addr | ||
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# Symbolicate .aot | ||
python3 ../../../test-tools/addr2line/addr2line.py \ | ||
--wasi-sdk /opt/wasi-sdk \ | ||
--wabt /opt/wabt \ | ||
--wasm-file wasm-apps/trap.wasm \ | ||
call_stack_aot.txt |
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# Copyright (C) 2024 Amazon.com, Inc. or its affiliates. All Rights Reserved. | ||
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||
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if (APPLE) | ||
set (HAVE_FLAG_SEARCH_PATHS_FIRST 0) | ||
set (CMAKE_C_LINK_FLAGS "") | ||
set (CMAKE_CXX_LINK_FLAGS "") | ||
endif () | ||
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if (NOT DEFINED WASI_SDK_DIR) | ||
set (WASI_SDK_DIR "/opt/wasi-sdk") | ||
endif () | ||
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if (DEFINED WASI_SYSROOT) | ||
set (CMAKE_SYSROOT "${WASI_SYSROOT}") | ||
endif () | ||
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set (CMAKE_C_COMPILER "${WASI_SDK_DIR}/bin/clang") | ||
set (CMAKE_ASM_COMPILER "${WASI_SDK_DIR}/bin/clang") | ||
set (CMAKE_EXE_LINKER_FLAGS "-target wasm32-wasi") | ||
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################ 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() | ||
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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() | ||
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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() | ||
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################ 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}) | ||
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add_custom_target( | ||
wasm_to_aot | ||
ALL | ||
DEPENDS ${WAMR_COMPILER} ${WASM_MODULE} | ||
# 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} | ||
) | ||
endfunction () | ||
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set(CMAKE_BUILD_TYPE Debug) # Otherwise no debug symbols (addr2line) | ||
compile_sample(trap.c) |
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int | ||
c(int n) | ||
{ | ||
__builtin_trap(); | ||
} | ||
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int | ||
b(int n) | ||
{ | ||
n += 3; | ||
return c(n); | ||
} | ||
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int | ||
a(int n) | ||
{ | ||
return b(n); | ||
} | ||
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int | ||
main(int argc, char **argv) | ||
{ | ||
int i = 5; | ||
a(i); | ||
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return 0; | ||
} |
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