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yacc(1) copies its union so it is not a good place to store
TAILQ_HEADs. Allocate them instead. Found from a problem reported by sthen@.
This commit is contained in:
nicm
Nicholas Marriott
parent
1a3a973bd0
commit
17bc11bd15
263
cmd-parse.y
263
cmd-parse.y
@ -64,7 +64,7 @@ struct cmd_parse_state {
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u_int escapes;
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char *error;
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struct cmd_parse_commands commands;
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struct cmd_parse_commands *commands;
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struct cmd_parse_scope *scope;
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TAILQ_HEAD(, cmd_parse_scope) stack;
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@ -73,6 +73,7 @@ static struct cmd_parse_state parse_state;
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static char *cmd_parse_get_error(const char *, u_int, const char *);
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static void cmd_parse_free_command(struct cmd_parse_command *);
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static struct cmd_parse_commands *cmd_parse_new_commands(void);
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static void cmd_parse_free_commands(struct cmd_parse_commands *);
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%}
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@ -87,9 +88,9 @@ static void cmd_parse_free_commands(struct cmd_parse_commands *);
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int flag;
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struct {
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int flag;
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struct cmd_parse_commands commands;
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struct cmd_parse_commands *commands;
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} elif;
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struct cmd_parse_commands commands;
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struct cmd_parse_commands *commands;
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struct cmd_parse_command *command;
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}
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@ -114,45 +115,46 @@ lines : /* empty */
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{
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struct cmd_parse_state *ps = &parse_state;
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TAILQ_CONCAT(&ps->commands, &$1, entry);
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ps->commands = $1;
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}
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statements : statement '\n'
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{
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TAILQ_INIT(&$$);
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TAILQ_CONCAT(&$$, &$1, entry);
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$$ = $1;
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}
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| statements statement '\n'
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{
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TAILQ_INIT(&$$);
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TAILQ_CONCAT(&$$, &$1, entry);
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TAILQ_CONCAT(&$$, &$2, entry);
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$$ = $1;
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TAILQ_CONCAT($$, $2, entry);
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free($2);
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}
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statement : condition
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{
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struct cmd_parse_state *ps = &parse_state;
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TAILQ_INIT(&$$);
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if (ps->scope == NULL || ps->scope->flag)
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TAILQ_CONCAT(&$$, &$1, entry);
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else
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cmd_parse_free_commands(&$1);
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$$ = $1;
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else {
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$$ = cmd_parse_new_commands();
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cmd_parse_free_commands($1);
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}
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}
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| assignment
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{
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TAILQ_INIT(&$$);
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$$ = xmalloc (sizeof *$$);
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TAILQ_INIT($$);
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}
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| commands
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{
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struct cmd_parse_state *ps = &parse_state;
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TAILQ_INIT(&$$);
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if (ps->scope == NULL || ps->scope->flag)
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TAILQ_CONCAT(&$$, &$1, entry);
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else
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cmd_parse_free_commands(&$1);
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$$ = $1;
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else {
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$$ = cmd_parse_new_commands();
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cmd_parse_free_commands($1);
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}
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}
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expanded : FORMAT
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@ -242,117 +244,119 @@ if_close : ENDIF
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condition : if_open '\n' statements if_close
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{
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TAILQ_INIT(&$$);
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if ($1)
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TAILQ_CONCAT(&$$, &$3, entry);
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else
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cmd_parse_free_commands(&$3);
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$$ = $3;
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else {
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$$ = cmd_parse_new_commands();
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cmd_parse_free_commands($3);
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}
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}
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| if_open '\n' statements if_else '\n' statements if_close
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{
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TAILQ_INIT(&$$);
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if ($1) {
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TAILQ_CONCAT(&$$, &$3, entry);
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cmd_parse_free_commands(&$6);
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$$ = $3;
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cmd_parse_free_commands($6);
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} else {
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TAILQ_CONCAT(&$$, &$6, entry);
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cmd_parse_free_commands(&$3);
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$$ = $6;
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cmd_parse_free_commands($3);
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}
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}
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| if_open '\n' statements elif if_close
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{
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TAILQ_INIT(&$$);
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if ($1) {
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TAILQ_CONCAT(&$$, &$3, entry);
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cmd_parse_free_commands(&$4.commands);
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$$ = $3;
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cmd_parse_free_commands($4.commands);
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} else if ($4.flag) {
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TAILQ_CONCAT(&$$, &$4.commands, entry);
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cmd_parse_free_commands(&$3);
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$$ = $4.commands;
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cmd_parse_free_commands($3);
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} else {
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cmd_parse_free_commands(&$3);
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cmd_parse_free_commands(&$4.commands);
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$$ = cmd_parse_new_commands();
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cmd_parse_free_commands($3);
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cmd_parse_free_commands($4.commands);
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}
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}
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| if_open '\n' statements elif if_else '\n' statements if_close
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{
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TAILQ_INIT(&$$);
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if ($1) {
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TAILQ_CONCAT(&$$, &$3, entry);
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cmd_parse_free_commands(&$4.commands);
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cmd_parse_free_commands(&$7);
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$$ = $3;
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cmd_parse_free_commands($4.commands);
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cmd_parse_free_commands($7);
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} else if ($4.flag) {
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TAILQ_CONCAT(&$$, &$4.commands, entry);
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cmd_parse_free_commands(&$3);
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cmd_parse_free_commands(&$7);
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$$ = $4.commands;
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cmd_parse_free_commands($3);
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cmd_parse_free_commands($7);
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} else {
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TAILQ_CONCAT(&$$, &$7, entry);
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cmd_parse_free_commands(&$3);
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cmd_parse_free_commands(&$4.commands);
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$$ = $7;
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cmd_parse_free_commands($3);
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cmd_parse_free_commands($4.commands);
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}
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}
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elif : if_elif '\n' statements
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{
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TAILQ_INIT(&$$.commands);
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if ($1)
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TAILQ_CONCAT(&$$.commands, &$3, entry);
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else
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cmd_parse_free_commands(&$3);
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$$.flag = $1;
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if ($1) {
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$$.flag = 1;
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$$.commands = $3;
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} else {
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$$.flag = 0;
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$$.commands = cmd_parse_new_commands();
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cmd_parse_free_commands($3);
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}
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}
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| if_elif '\n' statements elif
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{
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TAILQ_INIT(&$$.commands);
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if ($1) {
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$$.flag = 1;
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TAILQ_CONCAT(&$$.commands, &$3, entry);
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cmd_parse_free_commands(&$4.commands);
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$$.commands = $3;
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cmd_parse_free_commands($4.commands);
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} else if ($4.flag) {
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$$.flag = 1;
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$$.commands = $4.commands;
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cmd_parse_free_commands($3);
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} else {
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$$.flag = $4.flag;
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TAILQ_CONCAT(&$$.commands, &$4.commands, entry);
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cmd_parse_free_commands(&$3);
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$$.flag = 0;
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$$.commands = cmd_parse_new_commands();
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cmd_parse_free_commands($3);
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cmd_parse_free_commands($4.commands);
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}
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}
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commands : command
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{
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struct cmd_parse_state *ps = &parse_state;
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TAILQ_INIT(&$$);
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$$ = cmd_parse_new_commands();
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if (ps->scope == NULL || ps->scope->flag)
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TAILQ_INSERT_TAIL(&$$, $1, entry);
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TAILQ_INSERT_TAIL($$, $1, entry);
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else
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cmd_parse_free_command($1);
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}
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| commands ';'
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{
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TAILQ_INIT(&$$);
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TAILQ_CONCAT(&$$, &$1, entry);
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$$ = $1;
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}
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| commands ';' condition1
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{
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TAILQ_INIT(&$$);
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TAILQ_CONCAT(&$$, &$1, entry);
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TAILQ_CONCAT(&$$, &$3, entry);
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$$ = $1;
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TAILQ_CONCAT($$, $3, entry);
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free($3);
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}
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| commands ';' command
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{
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struct cmd_parse_state *ps = &parse_state;
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TAILQ_INIT(&$$);
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if (ps->scope == NULL || ps->scope->flag) {
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TAILQ_CONCAT(&$$, &$1, entry);
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TAILQ_INSERT_TAIL(&$$, $3, entry);
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$$ = $1;
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TAILQ_INSERT_TAIL($$, $3, entry);
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} else {
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cmd_parse_free_commands(&$1);
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$$ = cmd_parse_new_commands();
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cmd_parse_free_commands($1);
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cmd_parse_free_command($3);
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}
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}
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| condition1
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{
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TAILQ_INIT(&$$);
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TAILQ_CONCAT(&$$, &$1, entry);
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$$ = $1;
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}
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command : assignment TOKEN
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@ -378,76 +382,80 @@ command : assignment TOKEN
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condition1 : if_open commands if_close
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{
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TAILQ_INIT(&$$);
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if ($1)
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TAILQ_CONCAT(&$$, &$2, entry);
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else
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cmd_parse_free_commands(&$2);
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$$ = $2;
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else {
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$$ = cmd_parse_new_commands();
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cmd_parse_free_commands($2);
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}
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}
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| if_open commands if_else commands if_close
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{
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TAILQ_INIT(&$$);
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if ($1) {
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TAILQ_CONCAT(&$$, &$2, entry);
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cmd_parse_free_commands(&$4);
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$$ = $2;
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cmd_parse_free_commands($4);
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} else {
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TAILQ_CONCAT(&$$, &$4, entry);
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cmd_parse_free_commands(&$2);
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$$ = $4;
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cmd_parse_free_commands($2);
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}
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}
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| if_open commands elif1 if_close
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{
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TAILQ_INIT(&$$);
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if ($1) {
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TAILQ_CONCAT(&$$, &$2, entry);
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cmd_parse_free_commands(&$3.commands);
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$$ = $2;
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cmd_parse_free_commands($3.commands);
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} else if ($3.flag) {
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TAILQ_CONCAT(&$$, &$3.commands, entry);
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cmd_parse_free_commands(&$2);
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$$ = $3.commands;
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cmd_parse_free_commands($2);
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} else {
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cmd_parse_free_commands(&$2);
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cmd_parse_free_commands(&$3.commands);
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$$ = cmd_parse_new_commands();
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cmd_parse_free_commands($2);
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cmd_parse_free_commands($3.commands);
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}
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}
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| if_open commands elif1 if_else commands if_close
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{
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TAILQ_INIT(&$$);
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if ($1) {
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TAILQ_CONCAT(&$$, &$2, entry);
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cmd_parse_free_commands(&$3.commands);
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cmd_parse_free_commands(&$5);
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$$ = $2;
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cmd_parse_free_commands($3.commands);
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cmd_parse_free_commands($5);
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} else if ($3.flag) {
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TAILQ_CONCAT(&$$, &$3.commands, entry);
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cmd_parse_free_commands(&$2);
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cmd_parse_free_commands(&$5);
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$$ = $3.commands;
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cmd_parse_free_commands($2);
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cmd_parse_free_commands($5);
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} else {
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TAILQ_CONCAT(&$$, &$5, entry);
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cmd_parse_free_commands(&$2);
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cmd_parse_free_commands(&$3.commands);
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$$ = $5;
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cmd_parse_free_commands($2);
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cmd_parse_free_commands($3.commands);
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}
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}
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elif1 : if_elif commands
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{
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TAILQ_INIT(&$$.commands);
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if ($1)
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TAILQ_CONCAT(&$$.commands, &$2, entry);
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else
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cmd_parse_free_commands(&$2);
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$$.flag = $1;
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if ($1) {
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$$.flag = 1;
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$$.commands = $2;
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} else {
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$$.flag = 0;
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$$.commands = cmd_parse_new_commands();
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cmd_parse_free_commands($2);
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}
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}
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| if_elif commands elif1
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{
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TAILQ_INIT(&$$.commands);
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if ($1) {
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$$.flag = 1;
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TAILQ_CONCAT(&$$.commands, &$2, entry);
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cmd_parse_free_commands(&$3.commands);
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$$.commands = $2;
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cmd_parse_free_commands($3.commands);
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} else if ($3.flag) {
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$$.flag = 1;
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$$.commands = $3.commands;
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cmd_parse_free_commands($2);
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} else {
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$$.flag = $3.flag;
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TAILQ_CONCAT(&$$.commands, &$3.commands, entry);
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cmd_parse_free_commands(&$2);
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$$.flag = 0;
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$$.commands = cmd_parse_new_commands();
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cmd_parse_free_commands($2);
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cmd_parse_free_commands($3.commands);
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}
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}
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@ -496,6 +504,16 @@ cmd_parse_free_command(struct cmd_parse_command *cmd)
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free(cmd);
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}
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static struct cmd_parse_commands *
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cmd_parse_new_commands(void)
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{
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struct cmd_parse_commands *cmds;
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cmds = xmalloc(sizeof *cmds);
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TAILQ_INIT (cmds);
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return (cmds);
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}
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static void
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cmd_parse_free_commands(struct cmd_parse_commands *cmds)
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{
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@ -505,17 +523,17 @@ cmd_parse_free_commands(struct cmd_parse_commands *cmds)
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TAILQ_REMOVE(cmds, cmd, entry);
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cmd_parse_free_command(cmd);
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}
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free(cmds);
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}
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static struct cmd_parse_commands *
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cmd_parse_run_parser(char **cause)
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{
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struct cmd_parse_state *ps = &parse_state;
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struct cmd_parse_commands *cmds;
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struct cmd_parse_scope *scope, *scope1;
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int retval;
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struct cmd_parse_state *ps = &parse_state;
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struct cmd_parse_scope *scope, *scope1;
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int retval;
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TAILQ_INIT(&ps->commands);
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ps->commands = NULL;
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TAILQ_INIT(&ps->stack);
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retval = yyparse();
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@ -528,10 +546,9 @@ cmd_parse_run_parser(char **cause)
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return (NULL);
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}
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cmds = xmalloc(sizeof *cmds);
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TAILQ_INIT(cmds);
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TAILQ_CONCAT(cmds, &ps->commands, entry);
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return (cmds);
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if (ps->commands == NULL)
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return (cmd_parse_new_commands());
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return (ps->commands);
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}
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static struct cmd_parse_commands *
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@ -573,7 +590,7 @@ cmd_parse_build_commands(struct cmd_parse_commands *cmds,
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/* Check for an empty list. */
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if (TAILQ_EMPTY(cmds)) {
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free(cmds);
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cmd_parse_free_commands(cmds);
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pr.status = CMD_PARSE_EMPTY;
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return (&pr);
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}
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@ -667,7 +684,6 @@ cmd_parse_build_commands(struct cmd_parse_commands *cmds,
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out:
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cmd_parse_free_commands(cmds);
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free(cmds);
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return (&pr);
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}
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@ -746,8 +762,7 @@ cmd_parse_from_arguments(int argc, char **argv, struct cmd_parse_input *pi)
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}
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cmd_log_argv(argc, argv, "%s", __func__);
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cmds = xmalloc(sizeof *cmds);
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TAILQ_INIT(cmds);
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cmds = cmd_parse_new_commands();
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copy = cmd_copy_argv(argc, argv);
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last = 0;
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@ -800,6 +815,8 @@ cmd_parse_from_arguments(int argc, char **argv, struct cmd_parse_input *pi)
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TAILQ_INSERT_TAIL(cmds, cmd, entry);
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}
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}
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cmd_free_argv(argc, copy);
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return (cmd_parse_build_commands(cmds, pi));
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}
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