msSanitizer算子检测工具快速入门¶
1. 概述¶
msSanitizer工具是基于昇腾AI处理器的异常检测工具，包含单算子开发场景下的内存检测、竞争检测、未初始化检测和同步检测四个子功能。
本文档基于入门教程中开发的简易加法算子，演示 msSanitizer 工具的核心功能，帮助初学者直观感受其为算子开发过程带来的高效与便捷。
1.1 建议¶
本章节以您已完成《算子开发工具快速入门》的全流程操作为前提；若尚未体验，建议先完成该指南以获得更佳的学习效果。
1.2 环境准备¶
请严格按照《昇腾 AI 算子开发工具链学习环境安装指南》完成环境安装与工作区配置。 即使您已具备类似环境，也需按该指南重新执行一遍，以确保所有依赖组件、环境变量等完整且一致。
2. 操作步骤¶
2.1 【环境】运行环境预检¶
2.1.1 确认 Python 依赖包已安装¶
执行以下命令，若输出"All is OK"，则表明所需 Python 包及其版本均满足规范：
python3 -c "import numpy, sympy, scipy, attrs, psutil, decorator; from packaging import version; assert version.parse(numpy.__version__) <= version.parse('1.26.4'); print('All is OK')"
若报错，请参照第 1.2 节进行正确安装。
2.2 【前提】算子工程准备完成¶
按照《昇腾算子开发工具链快速入门》中的指导，完成 2.1 节和 2.3 节。
2.3 【检测】算子异常检测（msSanitizer）¶
msSanitizer 工具用于检测内存越界、竞争条件、未初始化变量及同步异常等严重运行时缺陷，帮助开发者高效定位隐蔽的运行时错误。建议先跟随操作体验效果，原理部分可稍后阅读。
2.3.1 修改编译选项¶
为启用检测能力，需在 Kernel 侧的 CMakeLists.txt 首行插入 sanitizer 编译选项，注入检测桩代码：
cd ~/ot_demo/workspace/src/AddCustom
\cp -f op_kernel/CMakeLists.txt op_kernel/CMakeLists.txt.bak
printf '%s\n' "if(COMMAND add_ops_compile_options)" " add_ops_compile_options(ALL OPTIONS -sanitizer)" "elseif(COMMAND npu_op_kernel_options)" " npu_op_kernel_options(ascendc_kernels ALL OPTIONS -sanitizer)" "endif()" | cat - op_kernel/CMakeLists.txt > tmp && mv -f tmp op_kernel/CMakeLists.txt;
2.3.2 构造内存越界错误¶
修改 op_kernel/add_custom.cpp 中的 CopyOut 函数，具体修改如下（将DataCopy内存拷贝长度增加一倍，触发 “非法读取”）：
- AscendC::DataCopy(zGm[progress * this->tileLength], zLocal, this->tileLength);
+ AscendC::DataCopy(zGm[progress * this->tileLength], zLocal, 2 * this->tileLength);
2.3.3 重新编译部署¶
bash ./build.sh
MY_OP_PKG=$(find ./build_out -maxdepth 1 -name "custom_opp_*.run" | head -1) && bash $MY_OP_PKG
2.3.4 执行内存检测¶
工具输出类似如下错误报告：
====== WARNING: out of bounds of size 256
====== at 0x12c0c0026000 on GM when writing data in AddCustom_ab1b6750d7f510985325b603cb06dc8b_0
====== in block aiv(1) on device 0
====== code in pc current 0x1e28 (serialNo:87)
====== #0 /usr/local/Ascend/ascend-toolkit/8.3.RC1/aarch64-linux/tikcpp/tikcfw/impl/dav_c220/kernel_operator_data_copy_impl.h:124:9
====== #1 /usr/local/Ascend/ascend-toolkit/8.3.RC1/aarch64-linux/tikcpp/tikcfw/impl/kernel_operator_data_copy_intf_impl.h:204:9
====== #2 /usr/local/Ascend/ascend-toolkit/8.3.RC1/aarch64-linux/tikcpp/tikcfw/impl/kernel_operator_data_copy_intf_impl.h:573:5
====== #3 /root/ot_demo/workspace/src/AddCustom/op_kernel/add_custom.cpp:128:10
====== #4 /root/ot_demo/workspace/src/AddCustom/op_kernel/add_custom.cpp:63:14
====== #5 /root/ot_demo/workspace/src/AddCustom/op_kernel/add_custom.cpp:169:9
2.3.5 执行竞争检测¶
工具输出如下错误报告：
====== ERROR: Potential WAR hazard detected at UB in AddCustom_ab1b6750d7f510985325b603cb06dc8b_0 on device 0:
====== PIPE_MTE3 Read at WAR()+0x400 in block 0 (aiv) on device 0 at pc current 0x1e28 (serialNo:31)
====== #0 /usr/local/Ascend/ascend-toolkit/8.3.RC1/aarch64-linux/tikcpp/tikcfw/impl/dav_c220/kernel_operator_data_copy_impl.h:124:9
====== #1 /usr/local/Ascend/ascend-toolkit/8.3.RC1/aarch64-linux/tikcpp/tikcfw/impl/kernel_operator_data_copy_intf_impl.h:204:9
====== #2 /usr/local/Ascend/ascend-toolkit/8.3.RC1/aarch64-linux/tikcpp/tikcfw/impl/kernel_operator_data_copy_intf_impl.h:573:5
====== #3 /root/ot_demo/workspace/src/AddCustom/op_kernel/add_custom.cpp:128:10
====== #4 /root/ot_demo/workspace/src/AddCustom/op_kernel/add_custom.cpp:63:14
====== #5 /root/ot_demo/workspace/src/AddCustom/op_kernel/add_custom.cpp:169:9
2.3.6 未初始化检测¶
工具输出如下错误报告：
====== ERROR: uninitialized read of size 256
====== at 0x400 on UB in AddCustom_ab1b6750d7f510985325b603cb06dc8b_0
====== in block aiv(0-7) on device 3
====== code in pc current 0x1e34 (serialNo:241)
====== #0 /usr/local/Ascend/cann-8.5.0/aarch64-linux/asc/impl/basic_api/dav_c220/kernel_operator_data_copy_impl.h:124:9
====== #1 /usr/local/Ascend/cann-8.5.0/aarch64-linux/asc/impl/basic_api/kernel_operator_data_copy_intf_impl.h:265:9
====== #2 /usr/local/Ascend/cann-8.5.0/aarch64-linux/asc/impl/basic_api/kernel_operator_data_copy_intf_impl.h:736:5
====== #3 /root/ot_demo/workspace/src/AddCustom/op_kernel/add_custom.cpp:126:9
====== #4 /root/ot_demo/workspace/src/AddCustom/op_kernel/add_custom.cpp:63:13
====== #5 /root/ot_demo/workspace/src/AddCustom/op_kernel/add_custom.cpp:167:8
2.3.7 恢复被修改的文件¶
执行如下命令：