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https://github.com/NVIDIA/cuda-samples.git
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268 lines
8.6 KiB
C
268 lines
8.6 KiB
C
// Copyright (c) 1993-2023, NVIDIA CORPORATION. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of NVIDIA CORPORATION nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <assert.h>
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#include <nvvm.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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/* Two levels of indirection to stringify LIBDEVICE_MAJOR_VERSION and
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* LIBDEVICE_MINOR_VERSION correctly. */
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#define getLibDeviceName() \
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_getLibDeviceName(LIBDEVICE_MAJOR_VERSION, LIBDEVICE_MINOR_VERSION)
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#define _getLibDeviceName(MAJOR, MINOR) __getLibDeviceName(MAJOR, MINOR)
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#define __getLibDeviceName(MAJOR, MINOR) \
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("/libdevice/libdevice." #MAJOR #MINOR ".bc")
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#define getLibnvvmHome() _getLibnvvmHome(LIBNVVM_HOME)
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#define _getLibnvvmHome(NVVM_HOME) __getLibnvvmHome(NVVM_HOME)
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#define __getLibnvvmHome(NVVM_HOME) (#NVVM_HOME)
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typedef enum {
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PTXGEN_SUCCESS = 0x0000,
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PTXGEN_FILE_IO_ERROR = 0x0001,
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PTXGEN_BAD_ALLOC_ERROR = 0x0002,
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PTXGEN_LIBNVVM_COMPILATION_ERROR = 0x0004,
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PTXGEN_LIBNVVM_ERROR = 0x0008,
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PTXGEN_INVALID_USAGE = 0x0010,
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PTXGEN_LIBNVVM_HOME_UNDEFINED = 0x0020,
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PTXGEN_LIBNVVM_VERIFICATION_ERROR = 0x0040
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} PTXGenStatus;
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typedef enum { PTXGEN_INPUT_PROGRAM, PTXGEN_INPUT_LIBDEVICE } PTXGENInput;
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static PTXGenStatus getLibDevicePath(char **buffer) {
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assert(buffer);
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const char *libnvvmPath = getLibnvvmHome();
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if (libnvvmPath == NULL) {
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fprintf(stderr, "The environment variable LIBNVVM_HOME undefined\n");
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return PTXGEN_LIBNVVM_HOME_UNDEFINED;
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}
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const char *libdevice = getLibDeviceName();
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*buffer = malloc(strlen(libnvvmPath) + strlen(libdevice) + 1);
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if (*buffer == NULL) {
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fprintf(stderr, "Failed to allocate memory\n");
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return PTXGEN_BAD_ALLOC_ERROR;
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}
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// Concatenate libnvvmPath with libdevice.
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*buffer = strcat(strcpy(*buffer, libnvvmPath), libdevice);
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return PTXGEN_SUCCESS;
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}
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static PTXGenStatus addFileToProgram(const char *filename, nvvmProgram prog,
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PTXGENInput inputType) {
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assert(filename);
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// Open the input file.
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FILE *f = fopen(filename, "rb");
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if (f == NULL) {
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fprintf(stderr, "Failed to open %s\n", filename);
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return PTXGEN_FILE_IO_ERROR;
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}
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// Allocate a buffer for the input.
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struct stat fileStat;
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fstat(fileno(f), &fileStat);
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char *buffer = malloc(fileStat.st_size);
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if (buffer == NULL) {
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fprintf(stderr, "Failed to allocate memory\n");
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return PTXGEN_BAD_ALLOC_ERROR;
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}
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const size_t size = fread(buffer, 1, fileStat.st_size, f);
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if (ferror(f)) {
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fprintf(stderr, "Failed to read %s\n", filename);
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fclose(f);
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free(buffer);
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return PTXGEN_FILE_IO_ERROR;
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}
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fclose(f);
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// Add the input to the libNVVM program instance.
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nvvmResult result;
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if (inputType == PTXGEN_INPUT_LIBDEVICE)
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result = nvvmLazyAddModuleToProgram(prog, buffer, size, filename);
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else
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result = nvvmAddModuleToProgram(prog, buffer, size, filename);
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if (result != NVVM_SUCCESS) {
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fprintf(stderr, "Failed to add the module %s to the compilation unit\n",
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filename);
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free(buffer);
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return PTXGEN_LIBNVVM_ERROR;
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}
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free(buffer);
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return PTXGEN_SUCCESS;
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}
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// Read the nvvmProgram compilation log.
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static PTXGenStatus dumpCompilationLog(nvvmProgram prog) {
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size_t logSize;
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PTXGenStatus status = PTXGEN_SUCCESS;
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if (nvvmGetProgramLogSize(prog, &logSize) != NVVM_SUCCESS) {
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fprintf(stderr, "Failed to get the compilation log size\n");
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status = PTXGEN_LIBNVVM_ERROR;
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} else {
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char *log = malloc(logSize);
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if (log == NULL) {
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fprintf(stderr, "Failed to allocate memory\n");
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status = PTXGEN_BAD_ALLOC_ERROR;
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} else if (nvvmGetProgramLog(prog, log) != NVVM_SUCCESS) {
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fprintf(stderr, "Failed to get the compilation log\n");
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status = PTXGEN_LIBNVVM_ERROR;
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} else {
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fprintf(stderr, "%s\n", log);
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}
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free(log);
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}
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return status;
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}
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static PTXGenStatus generatePTX(unsigned numOptions, const char **options,
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unsigned numFilenames, const char **filenames) {
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// Create the compilation unit (the libNVVM program instance).
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nvvmProgram prog;
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if (nvvmCreateProgram(&prog) != NVVM_SUCCESS) {
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fprintf(stderr, "Failed to create the compilation unit\n");
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return PTXGEN_LIBNVVM_ERROR;
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}
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// Add the module to the compilation unit.
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for (unsigned i = 0; i < numFilenames; ++i) {
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PTXGenStatus status =
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addFileToProgram(filenames[i], prog, PTXGEN_INPUT_PROGRAM);
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if (status != PTXGEN_SUCCESS) {
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nvvmDestroyProgram(&prog);
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return status;
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}
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}
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// Verify the compilation unit.
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if (nvvmVerifyProgram(prog, numOptions, options) != NVVM_SUCCESS) {
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fprintf(stderr, "Failed to verify the compilation unit\n");
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return PTXGEN_LIBNVVM_VERIFICATION_ERROR;
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}
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// Add libdevice to the libNVVM program instance.
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char *libDeviceName;
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PTXGenStatus status = getLibDevicePath(&libDeviceName);
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if (status != PTXGEN_SUCCESS) {
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nvvmDestroyProgram(&prog);
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return status;
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}
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status = addFileToProgram(libDeviceName, prog, PTXGEN_INPUT_LIBDEVICE);
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free(libDeviceName);
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if (status != PTXGEN_SUCCESS) {
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nvvmDestroyProgram(&prog);
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return status;
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}
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// Display the compilation log.
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status |= dumpCompilationLog(prog);
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if (status & PTXGEN_LIBNVVM_VERIFICATION_ERROR) {
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nvvmDestroyProgram(&prog);
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return status;
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}
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// Compile the compilation unit.
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if (nvvmCompileProgram(prog, numOptions, options) != NVVM_SUCCESS) {
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fprintf(stderr, "Failed to generate PTX from the compilation unit\n");
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status |= PTXGEN_LIBNVVM_COMPILATION_ERROR;
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} else {
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size_t ptxSize;
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if (nvvmGetCompiledResultSize(prog, &ptxSize) != NVVM_SUCCESS) {
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fprintf(stderr, "Failed to get the PTX output size\n");
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status |= PTXGEN_LIBNVVM_ERROR;
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} else {
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char *ptx = malloc(ptxSize);
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if (ptx == NULL) {
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fprintf(stderr, "Failed to allocate memory\n");
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status |= PTXGEN_BAD_ALLOC_ERROR;
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} else if (nvvmGetCompiledResult(prog, ptx) != NVVM_SUCCESS) {
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fprintf(stderr, "Failed to get the PTX output\n");
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status |= PTXGEN_LIBNVVM_ERROR;
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} else {
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fprintf(stdout, "%s\n", ptx);
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}
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free(ptx);
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}
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}
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status |= dumpCompilationLog(prog);
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// Release the resources.
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nvvmDestroyProgram(&prog);
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return status;
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}
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static void showUsage(void) {
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fprintf(stderr,
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"Usage: ptxgen [OPTION]... [FILE]...\n"
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" [FILE] could be a .bc file or a .ll file\n");
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}
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int main(int argc, char *argv[]) {
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PTXGenStatus status = PTXGEN_SUCCESS;
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if (argc == 1) {
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showUsage();
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return PTXGEN_INVALID_USAGE;
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}
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// Extract libNVVM options and the input file names.
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unsigned numOptions = 0, numFilenames = 0;
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const char **options = malloc((argc - 1) * sizeof(char *));
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const char **filenames = malloc((argc - 1) * sizeof(char *));
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assert(options && filenames);
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for (int i = 1; i < argc; ++i) {
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if (argv[i][0] == '-') {
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options[numOptions] = argv[i];
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++numOptions;
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} else {
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filenames[numFilenames] = argv[i];
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++numFilenames;
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}
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}
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if (numFilenames == 0) {
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showUsage();
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status = PTXGEN_INVALID_USAGE;
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} else {
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// Use libNVVM to generate PTX.
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status = generatePTX(numOptions, options, numFilenames, filenames);
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}
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free(options);
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free(filenames);
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return status;
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}
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