Esempio n. 1
0
address NativeLookup::lookup_critical_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style) {
  if (!method->has_native_function()) {
    return NULL;
  }

  address current_entry = method->native_function();

  char dll_name[JVM_MAXPATHLEN];
  int offset;
  if (os::dll_address_to_library_name(current_entry, dll_name, sizeof(dll_name), &offset)) {
    char ebuf[32];
    void* dll = os::dll_load(dll_name, ebuf, sizeof(ebuf));
    if (dll != NULL) {
      // Compute complete JNI name for style
      stringStream st;
      if (os_style) os::print_jni_name_prefix_on(&st, args_size);
      st.print_raw(pure_name);
      st.print_raw(long_name);
      if (os_style) os::print_jni_name_suffix_on(&st, args_size);
      char* jni_name = st.as_string();
      return (address)os::dll_lookup(dll, jni_name);
    }
  }

  return NULL;
}
Esempio n. 2
0
address NativeLookup::lookup(methodHandle method, bool& in_base_library, TRAPS) {
  if (!method->has_native_function()) {
    address entry = lookup_base(method, in_base_library, CHECK_NULL);
    method->set_native_function(entry,
      Method::native_bind_event_is_interesting);
    // -verbose:jni printing
    if (PrintJNIResolving) {
      ResourceMark rm(THREAD);
      tty->print_cr("[Dynamic-linking native method %s.%s ... JNI]",
        method->method_holder()->external_name(),
        method->name()->as_C_string());
    }
  }
  return method->native_function();
}
Esempio n. 3
0
/**
 * 为给定的本地java方法寻找对应的函数入口地址
 */
address NativeLookup::lookup(methodHandle method, bool& in_base_library, TRAPS) {
  if (!method->has_native_function()) {
	printf("%s[%d] [tid: %lu]: 试图查找本地方法[%s.%s]..\n", __FILE__, __LINE__, pthread_self(), Klass::cast(method->method_holder())->external_name(), method->name()->as_C_string());
    address entry = lookup_base(method, in_base_library, CHECK_NULL);

    method->set_native_function(entry, methodOopDesc::native_bind_event_is_interesting);

    // -verbose:jni printing
    if (PrintJNIResolving) {
      ResourceMark rm(THREAD);
      tty->print_cr("[Dynamic-linking native method %s.%s ... JNI]",
        Klass::cast(method->method_holder())->external_name(),
        method->name()->as_C_string());
    }
  }

  return method->native_function();
}