LCOV - code coverage report
Current view: top level - lib/env_dpdk - sigbus_handler.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 0 49 0.0 %
Date: 2024-12-08 02:24:04 Functions: 0 5 0.0 %

          Line data    Source code
       1             : /*   SPDX-License-Identifier: BSD-3-Clause
       2             :  *   Copyright (C) 2020 Intel Corporation.
       3             :  *   All rights reserved.
       4             :  */
       5             : 
       6             : #include "spdk/stdinc.h"
       7             : #include "spdk/env.h"
       8             : #include "spdk/log.h"
       9             : 
      10             : struct sigbus_handler {
      11             :         spdk_pci_error_handler func;
      12             :         void *ctx;
      13             : 
      14             :         TAILQ_ENTRY(sigbus_handler) tailq;
      15             : };
      16             : 
      17             : static pthread_mutex_t g_sighandler_mutex = PTHREAD_MUTEX_INITIALIZER;
      18             : static TAILQ_HEAD(, sigbus_handler) g_sigbus_handler =
      19             :         TAILQ_HEAD_INITIALIZER(g_sigbus_handler);
      20             : 
      21             : static void
      22           0 : sigbus_fault_sighandler(int signum, siginfo_t *info, void *ctx)
      23             : {
      24             :         struct sigbus_handler *sigbus_handler;
      25             : 
      26           0 :         pthread_mutex_lock(&g_sighandler_mutex);
      27           0 :         TAILQ_FOREACH(sigbus_handler, &g_sigbus_handler, tailq) {
      28           0 :                 sigbus_handler->func(info->si_addr, sigbus_handler->ctx);
      29             :         }
      30           0 :         pthread_mutex_unlock(&g_sighandler_mutex);
      31           0 : }
      32             : 
      33             : __attribute__((constructor)) static void
      34           0 : device_set_signal(void)
      35             : {
      36           0 :         struct sigaction sa;
      37             : 
      38           0 :         sa.sa_sigaction = sigbus_fault_sighandler;
      39           0 :         sigemptyset(&sa.sa_mask);
      40           0 :         sa.sa_flags = SA_SIGINFO;
      41           0 :         sigaction(SIGBUS, &sa, NULL);
      42           0 : }
      43             : 
      44             : __attribute__((destructor)) static void
      45           0 : device_destroy_signal(void)
      46             : {
      47             :         struct sigbus_handler *sigbus_handler, *tmp;
      48             : 
      49           0 :         TAILQ_FOREACH_SAFE(sigbus_handler, &g_sigbus_handler, tailq, tmp) {
      50           0 :                 free(sigbus_handler);
      51             :         }
      52           0 : }
      53             : 
      54             : int
      55           0 : spdk_pci_register_error_handler(spdk_pci_error_handler sighandler, void *ctx)
      56             : {
      57             :         struct sigbus_handler *sigbus_handler;
      58             : 
      59           0 :         if (!sighandler) {
      60           0 :                 SPDK_ERRLOG("Error handler is NULL\n");
      61           0 :                 return -EINVAL;
      62             :         }
      63             : 
      64           0 :         pthread_mutex_lock(&g_sighandler_mutex);
      65           0 :         TAILQ_FOREACH(sigbus_handler, &g_sigbus_handler, tailq) {
      66           0 :                 if (sigbus_handler->func == sighandler) {
      67           0 :                         pthread_mutex_unlock(&g_sighandler_mutex);
      68           0 :                         SPDK_ERRLOG("Error handler has been registered\n");
      69           0 :                         return -EINVAL;
      70             :                 }
      71             :         }
      72           0 :         pthread_mutex_unlock(&g_sighandler_mutex);
      73             : 
      74           0 :         sigbus_handler = calloc(1, sizeof(*sigbus_handler));
      75           0 :         if (!sigbus_handler) {
      76           0 :                 SPDK_ERRLOG("Failed to allocate sigbus handler\n");
      77           0 :                 return -ENOMEM;
      78             :         }
      79             : 
      80           0 :         sigbus_handler->func = sighandler;
      81           0 :         sigbus_handler->ctx = ctx;
      82             : 
      83           0 :         pthread_mutex_lock(&g_sighandler_mutex);
      84           0 :         TAILQ_INSERT_TAIL(&g_sigbus_handler, sigbus_handler, tailq);
      85           0 :         pthread_mutex_unlock(&g_sighandler_mutex);
      86             : 
      87           0 :         return 0;
      88             : }
      89             : 
      90             : void
      91           0 : spdk_pci_unregister_error_handler(spdk_pci_error_handler sighandler)
      92             : {
      93             :         struct sigbus_handler *sigbus_handler;
      94             : 
      95           0 :         if (!sighandler) {
      96           0 :                 return;
      97             :         }
      98             : 
      99           0 :         pthread_mutex_lock(&g_sighandler_mutex);
     100           0 :         TAILQ_FOREACH(sigbus_handler, &g_sigbus_handler, tailq) {
     101           0 :                 if (sigbus_handler->func == sighandler) {
     102           0 :                         TAILQ_REMOVE(&g_sigbus_handler, sigbus_handler, tailq);
     103           0 :                         free(sigbus_handler);
     104           0 :                         pthread_mutex_unlock(&g_sighandler_mutex);
     105           0 :                         return;
     106             :                 }
     107             :         }
     108           0 :         pthread_mutex_unlock(&g_sighandler_mutex);
     109             : }

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