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8017611: Auto corrector for mistyped vm options

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The auto corrector for mistyped vm options fuzzy-matches existing flags based on string similarity (Dice's coefficient).

Reviewed-by: kvn, dsamersoff, hseigel, johnc
This commit is contained in:
Tao Mao 2013-06-28 20:18:04 -07:00
parent f93ee2a9dd
commit 7109e85e43
4 changed files with 128 additions and 4 deletions
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10
hotspot/src/share/vm/runtime/arguments.cpp
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@ -849,7 +849,7 @@ bool Arguments::process_argument(const char* arg,
arg_len = equal_sign - argname;
}
Flag* found_flag = Flag::find_flag((char*)argname, arg_len, true);
Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true);
if (found_flag != NULL) {
char locked_message_buf[BUFLEN];
found_flag->get_locked_message(locked_message_buf, BUFLEN);
@ -870,6 +870,14 @@ bool Arguments::process_argument(const char* arg,
} else {
jio_fprintf(defaultStream::error_stream(),
"Unrecognized VM option '%s'\n", argname);
Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true);
if (fuzzy_matched != NULL) {
jio_fprintf(defaultStream::error_stream(),
"Did you mean '%s%s%s'?\n",
(fuzzy_matched->is_bool()) ? "(+/-)" : "",
fuzzy_matched->name,
(fuzzy_matched->is_bool()) ? "" : "=<value>");
}
}
// allow for commandline "commenting out" options like -XX:#+Verbose