src/os/posix/vm/os_posix.cpp

*** 60,73 ****
--- 60,100 ----
      switch(rlim.rlim_cur) {
        case RLIM_INFINITY:
          jio_snprintf(buffer + n, bufferSize - n, "/core or core.%d", current_process_id());
          success = true;
          break;
+ 
        case 0:
+       {
          jio_snprintf(buffer, bufferSize, "Core dumps have been disabled. To enable core dumping, try \"ulimit -c unlimited\" before starting Java again");
+ 
+ #ifdef LINUX
+         /*
+          * Max length of /proc/sys/kernel/core_pattern is 128 characters.
+          * See https://www.kernel.org/doc/Documentation/sysctl/kernel.txt
+          */
+         const int core_pattern_len = 129;
+ 
+         char core_pattern[core_pattern_len] = {0};
+         bool is_redirect = false;
+         FILE *core_pattern_file = fopen("/proc/sys/kernel/core_pattern", "r");
+         if(core_pattern_file != NULL){
+           fgets(core_pattern, core_pattern_len, core_pattern_file);
+           fclose(core_pattern_file);
+           is_redirect = core_pattern[0] == '|';
+         }
+ 
+         if(is_redirect){
+           jio_snprintf(buffer, bufferSize,
+                    "Core dumps may be treated with \"%s\"", &core_pattern[1]);
+         }
+ #endif
+ 
          success = false;
          break;
+       }
+ 
        default:
          jio_snprintf(buffer + n, bufferSize - n, "/core or core.%d (max size %lu kB). To ensure a full core dump, try \"ulimit -c unlimited\" before starting Java again", current_process_id(), (unsigned long)(rlim.rlim_cur >> 10));
          success = true;
          break;
      }