7129724: MAC: Core file location is wrong in crash report

Summary: Updated core path location to reflect macosx default
Reviewed-by: dholmes, kamg

src/os/bsd/vm/os_bsd.cpp

@@ -5801,3 +5801,14 @@ bool os::is_headless_jre() {
 
     return true;
 }
+
+// Get the default path to the core file
+// Returns the length of the string
+int os::get_core_path(char* buffer, size_t bufferSize) {
+  int n = jio_snprintf(buffer, bufferSize, "/cores");
+
+  // Truncate if theoretical string was longer than bufferSize
+  n = MIN2(n, (int)bufferSize);
+
+  return n;
+}

src/os/linux/vm/os_linux.cpp

@@ -5447,6 +5447,18 @@ bool os::is_headless_jre() {
     return true;
 }
 
+// Get the default path to the core file
+// Returns the length of the string
+int os::get_core_path(char* buffer, size_t bufferSize) {
+  const char* p = get_current_directory(buffer, bufferSize);
+
+  if (p == NULL) {
+    assert(p != NULL, "failed to get current directory");
+    return 0;
+  }
+
+  return strlen(buffer);
+}
 
 #ifdef JAVASE_EMBEDDED
 //

src/os/posix/vm/os_posix.cpp

@@ -34,19 +34,19 @@
 
 // Check core dump limit and report possible place where core can be found
 void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize) {
+  int n;
   struct rlimit rlim;
-  static char cwd[O_BUFLEN];
   bool success;
 
-  get_current_directory(cwd, sizeof(cwd));
+  n = get_core_path(buffer, bufferSize);
 
   if (getrlimit(RLIMIT_CORE, &rlim) != 0) {
-    jio_snprintf(buffer, bufferSize, "%s/core or core.%d (may not exist)", cwd, current_process_id());
+    jio_snprintf(buffer + n, bufferSize - n, "/core or core.%d (may not exist)", current_process_id());
     success = true;
   } else {
     switch(rlim.rlim_cur) {
       case RLIM_INFINITY:
-        jio_snprintf(buffer, bufferSize, "%s/core or core.%d", cwd, current_process_id());
+        jio_snprintf(buffer + n, bufferSize - n, "/core or core.%d", current_process_id());
         success = true;
         break;
       case 0:
@@ -54,7 +54,7 @@ void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char*
         success = false;
         break;
       default:
-        jio_snprintf(buffer, bufferSize, "%s/core or core.%d (max size %lu kB). To ensure a full core dump, try \"ulimit -c unlimited\" before starting Java again", cwd, current_process_id(), (unsigned long)(rlim.rlim_cur >> 10));
+        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;
     }

src/os/solaris/vm/os_solaris.cpp

@@ -6537,3 +6537,16 @@ int os::bind(int fd, struct sockaddr* him, socklen_t len) {
    INTERRUPTIBLE_RETURN_INT_NORESTART(::bind(fd, him, len),\
                                       os::Solaris::clear_interrupted);
 }
+
+// Get the default path to the core file
+// Returns the length of the string
+int os::get_core_path(char* buffer, size_t bufferSize) {
+  const char* p = get_current_directory(buffer, bufferSize);
+
+  if (p == NULL) {
+    assert(p != NULL, "failed to get current directory");
+    return 0;
+  }
+
+  return strlen(buffer);
+}

src/share/vm/runtime/os.hpp

@@ -665,6 +665,10 @@ class os: AllStatic {
   // On Windows this will create an actual minidump, on Linux/Solaris it will simply check core dump limits
   static void check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize);
 
+  // Get the default path to the core file
+  // Returns the length of the string
+  static int get_core_path(char* buffer, size_t bufferSize);
+
   // JVMTI & JVM monitoring and management support
   // The thread_cpu_time() and current_thread_cpu_time() are only
   // supported if is_thread_cpu_time_supported() returns true.