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ROCm-GDB

The ROCm-GDB repository includes the source code for ROCm-GDB. ROCm-GDB is a modified version of GDB 7.8 that supports debugging GPU kernels on Radeon Open Compute platforms (ROCm).

Package Contents

The ROCm-GDB repository includes

• A modified version of gdb-7.8 to support GPU debugging. Note the main ROCm specific files are located in gdb-7.8/gdb with the hsail-* prefix.
• The ROCm debug facilities library located in amd/HwDbgFacilities/. This library provides symbol processing for GPU kernels.

Build Steps

1. Clone the ROCm-GDB repository

• git clone https://github.com/RadeonOpenCompute/ROCm-GDB.git

2. The gdb build has been modified with new files and configure settings to enable GPU debugging. The scripts below should be run to compile gdb. The run_configure_rocm.sh script calls the GNU autotools configure with additional parameters.

• ./run_configure_rocm.sh debug

3. The run_configure_rocm.sh script also generates the run_make_rocm.sh which sets environment variables for the Make step

• ./run_make_rocm.sh

Running ROCm-GDB

The run_make_rocm.sh script builds the gdb executable.

To run the ROCm debugger, you'd also need to get the ROCm GPU Debug SDK.

Before running the rocm debugger, the LD_LIBRARY_PATH should include paths to

• The ROCm GPU Debug Agent library built in the ROCm GPU Debug SDK (located in gpudebugsdk/lib/x86_64)
• The ROCm GPU Debugging library binary shippped with the ROCm GPU Debug SDK (located in gpudebugsdk/lib/x86_64)
• Before running ROCm-GDB, please update your .gdbinit file with text in gpudebugsdk/src/HSADebugAgent/gdbinit. The rocmConfigure function in the ~/.gdbinit sets up gdb internals for supporting GPU kernel debug.
• The gdb executable should be run from within the rocm-gdb-local script. The ROCm runtime requires certain environment variables to enable kernel debugging and this is set up by the rocm-gdb-local script.

./rocm-gdb-local < sample application>

• A brief tutorial on how to debug GPU applications using ROCm-GDB =======

ROCm-GPUDebugSDK

The ROCm-GPUDebugSDK repository provides the components required to build a GPU kernel debugger for Radeon Open Compute platforms (ROCm). The ROCm GPU Debug SDK components are used by ROCm-GDB and CodeXL debugger to support debugging GPU kernels on ROCm.

Package Contents

The ROCm GPU Debug SDK includes the source code and libraries briefly listed below

• Source code
  • HSA Debug Agent: The HSA Debug Agent is a library injected into an HSA application by the ROCR-Runtime. The source code for the Agent is provided in src/HSADebugAgent.
  • Debug Facilities: The Debug Facilities is a utility library to perform symbol processing for ROCm code object. The header file FacilitiesInterface.h is in the include folder while the source code is provided in src/HwDbgFacilities.
  • Matrix multiplication example: A sample HSA application that runs a matrix multiplication kernel.
• Header files and libraries
  • libAMDGPUDebugHSA-x64: This library provides the low level hardware control required to enable debugging a kernel executing on ROCm. The functionality of this library is exposed by the header file AMDGPUDebug.h in include/. The HSA Debug Agent library uses this interface
  • libelf: A libelf library compatible with the ROCm and its corresponding header files. The HSA Debug Agent library uses this libelf.

Build Steps

1. Install ROCm using the instruction here
2. Clone the Debug SDK repository

• git clone https://github.com/RadeonOpenCompute/ROCm-GPUDebugSDK.git

3. Build the AMD HSA Debug Agent Library and the Matrix multiplication examples by calling make in the src/HSADebugAgent and the samples/MatrixMultiplication directories respectively

• cd src/HSADebugAgent
• make
  • Note that matrixMul_kernel.hsail is included for reference only. This sample will load the pre-built hsa binary (matrixMul_kernel.brig) to run the kernel.
• cd samples/MatrixMultiplication
• make

4. Build the ROCm-GDB debugger as shown in the GDB repository.

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