+/* Debug output filtering */
+
+#if defined(ENABLE_DEBUG_FILTER)
+
+#if !defined(ENABLE_THREADS)
+u2 _no_threads_filterverbosecallctr[2] = { 0, 0 };
+#endif
+
+struct show_filter {
+ /* Boolean indicating if filter is enabled. */
+ u1 enabled;
+ /* Regular expression the method name is matched against */
+ regex_t regex;
+ /* Flag set on m->filtermatches if regex matches */
+ u1 flag;
+};
+
+typedef struct show_filter show_filter_t;
+
+#define SHOW_FILTERS_SIZE 3
+
+/* Array of filters applyed on a method */
+static struct show_filter show_filters[SHOW_FILTERS_SIZE];
+
+static void show_filter_init(show_filter_t *cf, const char *str, u1 flag, u1 default_flag, const char *description) {
+ int err;
+ char err_buf[128];
+
+ if (str) {
+ err = regcomp(&cf->regex, str, REG_EXTENDED | REG_NOSUB);
+ if (err != 0) {
+ regerror(err, &cf->regex, err_buf, sizeof(err_buf));
+ vm_abort(
+ "Invalid value given for %s: `%s' (%s).",
+ description, str, err_buf
+ );
+ }
+ cf->flag = flag;
+ cf->enabled = 1;
+ } else {
+ cf->flag = default_flag;
+ cf->enabled = 0;
+ }
+}
+
+void show_filters_init(void) {
+
+ show_filter_init(
+ show_filters + 0,
+ opt_filter_verbosecall_include,
+ SHOW_FILTER_FLAG_VERBOSECALL_INCLUDE,
+ SHOW_FILTER_FLAG_VERBOSECALL_INCLUDE,
+ "verbose call include filter"
+ );
+
+ show_filter_init(
+ show_filters + 1,
+ opt_filter_verbosecall_exclude,
+ SHOW_FILTER_FLAG_VERBOSECALL_EXCLUDE,
+ 0,
+ "verbose call exclude filter"
+ );
+
+ show_filter_init(
+ show_filters + 2,
+ opt_filter_show_method,
+ SHOW_FILTER_FLAG_SHOW_METHOD,
+ SHOW_FILTER_FLAG_SHOW_METHOD,
+ "show method filter"
+ );
+}
+
+/*
+
+ (Pseudo)State machine:
+
+ States are INITIAL, INCLUDE1, INCLUDE2, ..., EXCLUDE1, ..., EXCLUDE2, ...
+
+ Enter Enter
+ Enter Include Include
+ Exclude | | | |
+ | | Enter Enter Enter | | Enter | |
+ | | Include Include Exclude | | Exclude | |
+ | v ---------> ----------> ----------> | v ----------> | v
+INITIAL INCLUDE1 INCLUDE2 EXCLUDE1 EXCLUDE2
+ | ^ <--------- <---------- <---------- | ^ <---------- | ^
+ | | Exit Exit Exit | | Exit | |
+ | | Include Include Exclude | | Exclude | |
+ | | | | | |
+ Exit Exit Exit
+ Exclude Include Include
+
+ Verbose call scope is active if we are in a INCLUDE state.
+
+ State encoding:
+
+ INITIAL: ctr[0] == 0, ctr[1] == 0
+ INCLUDEN: ctr[1] == N, ctr[1] == 0
+ EXCLUDEN: ctr[1] == N
+*/
+
+void show_filters_apply(methodinfo *m) {
+ int i;
+ int res;
+ char *method_name;
+ s4 len;
+ s4 dumpsize;
+
+ /* compose full name of method */
+
+ len =
+ utf_bytes(m->class->name) +
+ 1 +
+ utf_bytes(m->name) +
+ utf_bytes(m->descriptor) +
+ 1;
+
+ dumpsize = dump_size(); /* allocate memory */
+
+ method_name = DMNEW(char, len);
+
+ utf_cat_classname(method_name, m->class->name);
+ strcat(method_name, ".");
+ utf_cat(method_name, m->name);
+ utf_cat(method_name, m->descriptor);
+
+ /* reset all flags */
+
+ m->filtermatches = 0;
+
+ for (i = 0; i < SHOW_FILTERS_SIZE; ++i) {
+ if (show_filters[i].enabled) {
+
+ res = regexec(&show_filters[i].regex, method_name, 0, NULL, 0);
+
+ if (res == 0) {
+ m->filtermatches |= show_filters[i].flag;
+ }
+ } else {
+ /* Default is to show all */
+ m->filtermatches |= show_filters[i].flag;
+ }
+ }
+
+ /* release memory */
+
+ dump_release(dumpsize);
+
+}
+
+#define STATE_IS_INITIAL() ((FILTERVERBOSECALLCTR[0] == 0) && (FILTERVERBOSECALLCTR[1] == 0))
+#define STATE_IS_INCLUDE() ((FILTERVERBOSECALLCTR[0] > 0) && (FILTERVERBOSECALLCTR[1] == 0))
+#define STATE_IS_EXCLUDE() (FILTERVERBOSECALLCTR[1] > 0)
+#define EVENT_INCLUDE() (m->filtermatches & SHOW_FILTER_FLAG_VERBOSECALL_INCLUDE)
+#define EVENT_EXCLUDE() (m->filtermatches & SHOW_FILTER_FLAG_VERBOSECALL_EXCLUDE)
+#define TRANSITION_NEXT_INCLUDE() ++FILTERVERBOSECALLCTR[0]
+#define TRANSITION_PREV_INCLUDE() --FILTERVERBOSECALLCTR[0]
+#define TRANSITION_NEXT_EXCLUDE() ++FILTERVERBOSECALLCTR[1]
+#define TRANSITION_PREV_EXCLUDE() --FILTERVERBOSECALLCTR[1]
+
+#if 0
+void dump_state() {
+ if (STATE_IS_INITIAL()) printf("<INITIAL>\n");
+ else if (STATE_IS_INCLUDE()) printf("<INCLUDE %hd>\n", FILTERVERBOSECALLCTR[0]);
+ else if (STATE_IS_EXCLUDE()) printf("<EXCLUDE %hd>\n", FILTERVERBOSECALLCTR[1]);
+}
+#endif
+
+int show_filters_test_verbosecall_enter(methodinfo *m) {
+
+ int force_show = 0;
+
+ if (STATE_IS_INITIAL()) {
+ if (EVENT_INCLUDE()) {
+ TRANSITION_NEXT_INCLUDE();
+ }
+ } else if (STATE_IS_INCLUDE()) {
+ if (EVENT_EXCLUDE()) {
+ TRANSITION_NEXT_EXCLUDE();
+ /* just entered exclude, show this method */
+ force_show = 1;
+ } else if (EVENT_INCLUDE()) {
+ TRANSITION_NEXT_INCLUDE();
+ }
+ } else if (STATE_IS_EXCLUDE()) {
+ if (EVENT_EXCLUDE()) {
+ TRANSITION_NEXT_EXCLUDE();
+ }
+ }
+
+ return STATE_IS_INCLUDE() || force_show;
+}
+
+int show_filters_test_verbosecall_exit(methodinfo *m) {
+
+ int force_show = 0;
+
+ if (m) {
+ if (STATE_IS_INCLUDE()) {
+ if (EVENT_INCLUDE()) {
+ TRANSITION_PREV_INCLUDE();
+ /* just entered initial, show this method */
+ if (STATE_IS_INITIAL()) force_show = 1;
+ }
+ } else if (STATE_IS_EXCLUDE()) {
+ if (EVENT_EXCLUDE()) {
+ TRANSITION_PREV_EXCLUDE();
+ }
+ }
+ }
+
+ return STATE_IS_INCLUDE() || force_show;
+}
+
+#endif
+