![]() ![]() The preexisting build options are used, but, as descibed above, additional options are used: -fsanitize=address, -shared-libsan and -g. These additional libraries are built using the amdclang++ and hipcc compilers, while some uninstrumented libraries are built with g++. The instrumented libraries have identical names as the regular uninstrumented libraries and are located in /opt/rocm-/lib/asan. ROCm releases have optional packages containing additional address sanitizer instrumented builds of the ROCm libraries usually found in /opt/rocm-/lib. Use AMD Supplied Address Sanitizer Instrumented Libraries # Again, this will reduce the effectiveness of the process. See below for more information.ĭisable instrumentation on a per-function basis by adding _attribute_((no_sanitize(“address”))) to functions found to be responsible for the large compile time. This option simplifies the added instrumentation resulting in faster compilation. This will reduce the effectiveness of the address sanitizer process.Īdd the option -fsanitize-recover=address to the compiles with the worst compile times. There are a few options if the compile time becomes unacceptable:Īvoid instrumentation of the files which have the worst compile times. This increase is especially evident in the AMDGPU device compiler and has in a few instances raised the compile time to an unacceptable level. This added code must be handled by all of the downstream components of the compiler toolchain and results in increased overall compilation time. When -fsanitize=address is used, the LLVM compiler adds instrumentation code around every memory operation. However, if the main program “ a.out” does not directly depend on the Address Sanitizer runtime ( libclang_rt.asan-x86_64.so) after the build completes (check by running ldd (List Dynamic Dependencies) or readelf), the application will immediately report an error at runtime as described in the next section. It is not an error to compile some files without address sanitizer instrumentation, but doing so reduces the ability of the process to detect addressing errors. Other architectures are allowed, but their device code will not be instrumented and a warning will be emitted. g - add debug info for improved reportingĮxplicitly use xnack+ in the offload architecture option. shared-libsan - use shared version of runtime fsanitize=address - enables instrumentation The address sanitizer process begins by compiling the application of interest with the address sanitizer instrumentation.Ĭompile as many application and dependent library sources as possible using an AMD-built clang-based compiler such as amdclang++.Īdd the following options to the existing compiler and linker options: This document provides documentation on using ROCm Address Sanitizer.įor information about LLVM Address Sanitizer, see the LLVM documentation. However, this simplicity has not been achieved yet. Ideally, developers should treat heterogeneous HIP and OpenMP applications exactly like pure CPU applications. However, ROCm has extended this mechanism to additionally allow the detection of some addressing errors on the GPU in heterogeneous applications. Until now, the LLVM Address Sanitizer process was only available for traditional purely CPU applications. The detection is achieved using a combination of compiler-added instrumentation and runtime techniques, including function interception and replacement. The LLVM Address Sanitizer provides a process that allows developers to detect runtime addressing errors in applications and libraries. ![]() How to provide feedback for ROCm documentation.Using the LLVM Address Sanitizer (ASAN) on the GPU.GPU Support and OS Compatibility (Linux). ![]()
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