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////////////////////////////////////////////////////////////////////////////////
//
// MIT License
//
// Copyright (c) 2017 - 2024 Advanced Micro Devices, Inc. All rights Reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
//
////////////////////////////////////////////////////////////////////////////////
#include <string.h>
#include <stdlib.h>
#include <limits.h> /* PATH_MAX */
#include <stdio.h>
#include <link.h>
#include <dlfcn.h>
#include "rocm_getpath.h"
/* Macro for NULL CHECK */
#define NULL_CHECK(ptr) if(!ptr) return PathIncorrecPararmeters;
/* Target Library Install Dir */
#define TARGET_LIB_INSTALL_DIR TARGET_LIBRARY_INSTALL_DIR
/* Target Library Name Buf Size */
#define LIBRARY_FILENAME_BUFSZ (PATH_MAX+1)
/* Internal Function to get Base Path - Ref from Icarus Logic*/
static int getROCmBase(char *buf);
/* Public Function to get the ROCm Install Base Path
// Argument1 (out) : InstallPath (char** pointer which will return InstallPath found)
// Argument2 (out) : InstallPathLen (Pointer to integer (size of InstallPath) returned)
// Usage :
// char *installPath=NULL;
// int installPathLen = 0;
// installStatus = getROCmInstallPath( &installPath, &installPathLen );
// if(installStatus !=PathSuccess ){ // error occured
// ...
// }
// free(installPath); //caller must free allocated memory after usage.
// ...
*/
PathErrors_t getROCmInstallPath( char** InstallPath, unsigned int *InstallPathLen ) {
NULL_CHECK(InstallPath);
NULL_CHECK(InstallPathLen);
int ret = PathErrorMAX;
char *bufPtr = (char *)NULL;
unsigned int bufSz = 0;
bufPtr = (char *)malloc( LIBRARY_FILENAME_BUFSZ * sizeof(char) );
memset( bufPtr, 0, LIBRARY_FILENAME_BUFSZ );
*InstallPathLen = 0;
*InstallPath = NULL;
ret = getROCmBase(bufPtr);
if (0 > ret){
free(bufPtr);
return (PathErrors_t)ret;
}
else if (0 == ret){
free(bufPtr);
return PathFailedToGetBase;
}
else{
bufSz = ret;//additional char for null termination
}
*InstallPath = bufPtr;
*InstallPathLen = bufSz;
return PathSuccess;
}
/* General purpose function that fills the directory to find rocm related stuff */
/* returns the offset into the buffer for the terminating NUL or -1 for error */
/* The buffer should be at least PATH_MAX */
static int getROCmBase(char *buf)
{
int len=0;
char *envStr=NULL;
char libFileName[LIBRARY_FILENAME_BUFSZ];
char *end=NULL;
// Check Environment Variable is set for ROCM
// install base path, then use it directly.
if ((envStr = getenv("ROCM_PATH"))) {
/* User space override, essentially just copied through as long as it is not too long */
len = strlen(envStr);
if (len > 0) {
if (envStr[len] == '/') {
/* Already has at least one terminating */
len--;
}
if (len > PATH_MAX-1 ) {
return PathValuesTooLong;
}
strncpy(buf, envStr, len);
buf[len]='/';
buf[len+1]='\0';
/* Length of string including trailing '/' */
return len+1;
}
}
// If Environment Variable is not set
// use dl APIs to get target lib path
// and get rocm base install path using the lib Path.
#if BUILD_SHARED_LIBS
sprintf(libFileName, "lib%s.so", TARGET_LIBRARY_NAME);
void *handle=dlopen(libFileName,RTLD_NOW);
if (!handle){
/* We can't find the library */
return PathLinuxRuntimeErrors;
}
/* Variable to hold the return value from dlinfo */
struct link_map *map = (struct link_map*)NULL;
/* Query the runtime linker */
dlinfo(handle,RTLD_DI_LINKMAP,&map);
if (map ->l_name && realpath(map ->l_name,buf)) {
/* Get Library Directory Path */
char *end = strrchr(buf, '/');
if (end && end > buf) {
*end = '\0';
}
}
else{
/* If l_name is NULL or realpath() failed
* Close handle before return error */
dlclose(handle);
return PathLinuxRuntimeErrors;
}
dlclose(handle);
/* find the start of substring TARGET_LIB_INSTALL_DIR
* To strip down Path up to Parent Directory of TARGET_LIB_INSTALL_DIR. */
end=strstr(buf, TARGET_LIB_INSTALL_DIR);
if( NULL == end ){
/* We can't find the library install directory*/
return PathLinuxRuntimeErrors;
}
*end = '\0';
#endif
/* Length of Path String up to Parent Directoy (ROCm Base Path)
* with trailing '/'.*/
len = strlen(buf);
return len;
}
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