Line data    Source code

       1              : /**
       2              :  * Copyright (c) 2025 Huawei Technologies Co., Ltd.
       3              :  * This program is free software, you can redistribute it and/or modify it under the terms and conditions of
       4              :  * CANN Open Software License Agreement Version 2.0 (the "License").
       5              :  * Please refer to the License for details. You may not use this file except in compliance with the License.
       6              :  * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED,
       7              :  * INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE.
       8              :  * See LICENSE in the root of the software repository for the full text of the License.
       9              :  */
      10              : 
      11              : #include "scd_ptrace.h"
      12              : #include <elf.h>
      13              : #include <sys/uio.h>
      14              : #include <sys/ptrace.h>
      15              : #include "scd_log.h"
      16              : 
      17              : #define MAX_PTRACE_REG_NUM 64U
      18              : 
      19           23 : TraStatus ScdPtraceAttach(int32_t tid)
      20              : {
      21           23 :     if (ptrace(PTRACE_ATTACH, tid, NULL, NULL) != 0) {
      22            0 :         return TRACE_FAILURE;
      23              :     }
      24           23 :     return TRACE_SUCCESS;
      25              : }
      26              : 
      27           23 : void ScdPtraceDetach(int32_t tid) { (void)ptrace(PTRACE_DETACH, tid, NULL, NULL); }
      28              : 
      29            4 : void ScdPtraceContinue(int32_t tid) { (void)ptrace(PTRACE_CONT, tid, NULL, NULL); }
      30              : 
      31            8 : TraStatus ScdPtraceGetRegs(int32_t tid, uintptr_t* regArray, size_t regNum)
      32              : {
      33              :     uintptr_t regs[MAX_PTRACE_REG_NUM]; // big enough for all architectures
      34            8 :     size_t regLen = 0;
      35              : 
      36              : #ifdef PTRACE_GETREGS
      37              :     if (ptrace(PTRACE_GETREGS, tid, NULL, &regs) != 0) {
      38              :         return TRACE_FAILURE;
      39              :     }
      40              :     regLen = regNum;
      41              : #else
      42              :     struct iovec iovec;
      43            8 :     iovec.iov_base = &regs;
      44            8 :     iovec.iov_len = sizeof(regs);
      45            8 :     if (ptrace(PTRACE_GETREGSET, tid, NT_PRSTATUS, &iovec) != 0) {
      46            4 :         return TRACE_FAILURE;
      47              :     }
      48            4 :     regLen = iovec.iov_len / sizeof(uintptr_t);
      49            4 :     regLen = (regLen > regNum) ? regNum : regLen;
      50              : #endif
      51            4 :     (void)memcpy_s(regArray, sizeof(uintptr_t) * regNum, regs, sizeof(uintptr_t) * regLen);
      52            4 :     return TRACE_SUCCESS;
      53              : }