X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Flib%2Flttng-ctl%2Ffilter%2Ffilter-parser.y;fp=src%2Flib%2Flttng-ctl%2Ffilter%2Ffilter-parser.y;h=0000000000000000000000000000000000000000;hp=ba2d3007b932754ea080d3f88ed4ff030aeda8d6;hb=e4d2f27a74baf6942ac8fcafd5ea53e775ceceb3;hpb=d44f9a1878031bfdb6ceee49d817430b11f0a58b

diff --git a/src/lib/lttng-ctl/filter/filter-parser.y b/src/lib/lttng-ctl/filter/filter-parser.y
deleted file mode 100644
index ba2d3007b..000000000
--- a/src/lib/lttng-ctl/filter/filter-parser.y
+++ /dev/null
@@ -1,679 +0,0 @@
-%{
-/*
- * filter-parser.y
- *
- * LTTng filter expression parser
- *
- * Copyright 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- * Grammar inspired from http://www.quut.com/c/ANSI-C-grammar-y.html
- */
-
-#include <stdio.h>
-#include <unistd.h>
-#include <string.h>
-#include <stdlib.h>
-#include <assert.h>
-#include <errno.h>
-#include <inttypes.h>
-#include "filter-ast.h"
-#include "filter-parser.h"
-
-#include <common/macros.h>
-
-#define WIDTH_u64_SCANF_IS_A_BROKEN_API	"20"
-#define WIDTH_o64_SCANF_IS_A_BROKEN_API	"22"
-#define WIDTH_x64_SCANF_IS_A_BROKEN_API	"17"
-#define WIDTH_lg_SCANF_IS_A_BROKEN_API	"4096"	/* Hugely optimistic approximation */
-
-LTTNG_HIDDEN
-int yydebug;
-LTTNG_HIDDEN
-int filter_parser_debug = 0;
-
-LTTNG_HIDDEN
-int yyparse(struct filter_parser_ctx *parser_ctx, yyscan_t scanner);
-LTTNG_HIDDEN
-int yylex(union YYSTYPE *yyval, yyscan_t scanner);
-LTTNG_HIDDEN
-int yylex_init_extra(struct filter_parser_ctx *parser_ctx, yyscan_t * ptr_yy_globals);
-LTTNG_HIDDEN
-int yylex_destroy(yyscan_t yyparser_ctx);
-LTTNG_HIDDEN
-void yyrestart(FILE * in_str, yyscan_t parser_ctx);
-
-struct gc_string {
-	struct cds_list_head gc;
-	size_t alloclen;
-	char s[];
-};
-
-static const char *node_type_to_str[] = {
-	[ NODE_UNKNOWN ] = "NODE_UNKNOWN",
-	[ NODE_ROOT ] = "NODE_ROOT",
-	[ NODE_EXPRESSION ] = "NODE_EXPRESSION",
-	[ NODE_OP ] = "NODE_OP",
-	[ NODE_UNARY_OP ] = "NODE_UNARY_OP",
-};
-
-LTTNG_HIDDEN
-const char *node_type(struct filter_node *node)
-{
-	if (node->type < NR_NODE_TYPES)
-		return node_type_to_str[node->type];
-	else
-		return NULL;
-}
-
-static struct gc_string *gc_string_alloc(struct filter_parser_ctx *parser_ctx,
-					 size_t len)
-{
-	struct gc_string *gstr;
-	size_t alloclen;
-
-	/* TODO: could be faster with find first bit or glib Gstring */
-	/* sizeof long to account for malloc header (int or long ?) */
-	for (alloclen = 8; alloclen < sizeof(long) + sizeof(*gstr) + len;
-	     alloclen *= 2);
-
-	gstr = zmalloc(alloclen);
-	if (!gstr) {
-		goto end;
-	}
-	cds_list_add(&gstr->gc, &parser_ctx->allocated_strings);
-	gstr->alloclen = alloclen;
-end:
-	return gstr;
-}
-
-/*
- * note: never use gc_string_append on a string that has external references.
- * gsrc will be garbage collected immediately, and gstr might be.
- * Should only be used to append characters to a string literal or constant.
- */
-static
-struct gc_string *gc_string_append(struct filter_parser_ctx *parser_ctx,
-				   struct gc_string *gstr,
-				   struct gc_string *gsrc)
-{
-	size_t newlen = strlen(gsrc->s) + strlen(gstr->s) + 1;
-	size_t alloclen;
-
-	/* TODO: could be faster with find first bit or glib Gstring */
-	/* sizeof long to account for malloc header (int or long ?) */
-	for (alloclen = 8; alloclen < sizeof(long) + sizeof(*gstr) + newlen;
-	     alloclen *= 2);
-
-	if (alloclen > gstr->alloclen) {
-		struct gc_string *newgstr;
-
-		newgstr = gc_string_alloc(parser_ctx, newlen);
-		strcpy(newgstr->s, gstr->s);
-		strcat(newgstr->s, gsrc->s);
-		cds_list_del(&gstr->gc);
-		free(gstr);
-		gstr = newgstr;
-	} else {
-		strcat(gstr->s, gsrc->s);
-	}
-	cds_list_del(&gsrc->gc);
-	free(gsrc);
-	return gstr;
-}
-
-LTTNG_HIDDEN
-void setstring(struct filter_parser_ctx *parser_ctx, YYSTYPE *lvalp, const char *src)
-{
-	lvalp->gs = gc_string_alloc(parser_ctx, strlen(src) + 1);
-	strcpy(lvalp->gs->s, src);
-}
-
-static struct filter_node *make_node(struct filter_parser_ctx *scanner,
-				  enum node_type type)
-{
-	struct filter_ast *ast = filter_parser_get_ast(scanner);
-	struct filter_node *node;
-
-	node = zmalloc(sizeof(*node));
-	if (!node)
-		return NULL;
-	memset(node, 0, sizeof(*node));
-	node->type = type;
-	cds_list_add(&node->gc, &ast->allocated_nodes);
-
-	switch (type) {
-	case NODE_ROOT:
-		fprintf(stderr, "[error] %s: trying to create root node\n", __func__);
-		break;
-
-	case NODE_EXPRESSION:
-		break;
-	case NODE_OP:
-		break;
-	case NODE_UNARY_OP:
-		break;
-
-	case NODE_UNKNOWN:
-	default:
-		fprintf(stderr, "[error] %s: unknown node type %d\n", __func__,
-			(int) type);
-		break;
-	}
-
-	return node;
-}
-
-static struct filter_node *make_op_node(struct filter_parser_ctx *scanner,
-			enum op_type type,
-			struct filter_node *lchild,
-			struct filter_node *rchild)
-{
-	struct filter_ast *ast = filter_parser_get_ast(scanner);
-	struct filter_node *node;
-
-	node = zmalloc(sizeof(*node));
-	if (!node)
-		return NULL;
-	memset(node, 0, sizeof(*node));
-	node->type = NODE_OP;
-	cds_list_add(&node->gc, &ast->allocated_nodes);
-	node->u.op.type = type;
-	node->u.op.lchild = lchild;
-	node->u.op.rchild = rchild;
-	return node;
-}
-
-static
-void yyerror(struct filter_parser_ctx *parser_ctx, yyscan_t scanner, const char *str)
-{
-	fprintf(stderr, "error %s\n", str);
-}
-
-#define parse_error(parser_ctx, str)				\
-do {								\
-	yyerror(parser_ctx, parser_ctx->scanner, YY_("parse error: " str "\n"));	\
-	YYERROR;						\
-} while (0)
-
-static void free_strings(struct cds_list_head *list)
-{
-	struct gc_string *gstr, *tmp;
-
-	cds_list_for_each_entry_safe(gstr, tmp, list, gc)
-		free(gstr);
-}
-
-static struct filter_ast *filter_ast_alloc(void)
-{
-	struct filter_ast *ast;
-
-	ast = zmalloc(sizeof(*ast));
-	if (!ast)
-		return NULL;
-	memset(ast, 0, sizeof(*ast));
-	CDS_INIT_LIST_HEAD(&ast->allocated_nodes);
-	ast->root.type = NODE_ROOT;
-	return ast;
-}
-
-static void filter_ast_free(struct filter_ast *ast)
-{
-	struct filter_node *node, *tmp;
-
-	cds_list_for_each_entry_safe(node, tmp, &ast->allocated_nodes, gc)
-		free(node);
-	free(ast);
-}
-
-LTTNG_HIDDEN
-int filter_parser_ctx_append_ast(struct filter_parser_ctx *parser_ctx)
-{
-	return yyparse(parser_ctx, parser_ctx->scanner);
-}
-
-LTTNG_HIDDEN
-struct filter_parser_ctx *filter_parser_ctx_alloc(FILE *input)
-{
-	struct filter_parser_ctx *parser_ctx;
-	int ret;
-
-	yydebug = filter_parser_debug;
-
-	parser_ctx = zmalloc(sizeof(*parser_ctx));
-	if (!parser_ctx)
-		return NULL;
-	memset(parser_ctx, 0, sizeof(*parser_ctx));
-
-	ret = yylex_init_extra(parser_ctx, &parser_ctx->scanner);
-	if (ret) {
-		fprintf(stderr, "yylex_init error\n");
-		goto cleanup_parser_ctx;
-	}
-	/* Start processing new stream */
-	yyrestart(input, parser_ctx->scanner);
-
-	parser_ctx->ast = filter_ast_alloc();
-	if (!parser_ctx->ast)
-		goto cleanup_lexer;
-	CDS_INIT_LIST_HEAD(&parser_ctx->allocated_strings);
-
-	if (yydebug)
-		fprintf(stdout, "parser_ctx input is a%s.\n",
-			isatty(fileno(input)) ? "n interactive tty" :
-						" noninteractive file");
-
-	return parser_ctx;
-
-cleanup_lexer:
-	ret = yylex_destroy(parser_ctx->scanner);
-	if (!ret)
-		fprintf(stderr, "yylex_destroy error\n");
-cleanup_parser_ctx:
-	free(parser_ctx);
-	return NULL;
-}
-
-LTTNG_HIDDEN
-void filter_parser_ctx_free(struct filter_parser_ctx *parser_ctx)
-{
-	int ret;
-
-	free_strings(&parser_ctx->allocated_strings);
-	filter_ast_free(parser_ctx->ast);
-	ret = yylex_destroy(parser_ctx->scanner);
-	if (ret)
-		fprintf(stderr, "yylex_destroy error\n");
-	free(parser_ctx);
-}
-
-%}
-
-%code provides
-{
-#include "common/macros.h"
-
-LTTNG_HIDDEN
-void setstring(struct filter_parser_ctx *parser_ctx, YYSTYPE *lvalp, const char *src);
-}
-
-%define api.pure
-	/* %locations */
-%parse-param {struct filter_parser_ctx *parser_ctx}
-%parse-param {yyscan_t scanner}
-%lex-param {yyscan_t scanner}
-%start translation_unit
-%token CHARACTER_CONSTANT_START SQUOTE STRING_LITERAL_START DQUOTE
-%token ESCSEQ CHAR_STRING_TOKEN
-%token DECIMAL_CONSTANT OCTAL_CONSTANT HEXADECIMAL_CONSTANT FLOAT_CONSTANT
-%token LSBRAC RSBRAC LPAREN RPAREN LBRAC RBRAC RARROW
-%token STAR PLUS MINUS
-%token MOD_OP DIV_OP RIGHT_OP LEFT_OP
-%token EQ_OP NE_OP LE_OP GE_OP LT_OP GT_OP AND_OP OR_OP NOT_OP
-%token ASSIGN COLON SEMICOLON DOTDOTDOT DOT EQUAL COMMA
-%token XOR_BIN AND_BIN OR_BIN NOT_BIN
-
-%token <gs> IDENTIFIER GLOBAL_IDENTIFIER
-%token ERROR
-%union
-{
-	long long ll;
-	char c;
-	struct gc_string *gs;
-	struct filter_node *n;
-}
-
-%type <gs> s_char s_char_sequence c_char c_char_sequence
-
-%type <n> primary_expression
-%type <n> prefix_expression
-%type <n> prefix_expression_rec
-%type <n> postfix_expression
-%type <n> unary_expression
-%type <n> unary_operator
-%type <n> multiplicative_expression
-%type <n> additive_expression
-%type <n> shift_expression
-%type <n> relational_expression
-%type <n> equality_expression
-%type <n> and_expression
-%type <n> exclusive_or_expression
-%type <n> inclusive_or_expression
-%type <n> logical_and_expression
-%type <n> logical_or_expression
-%type <n> expression
-%type <n> identifiers
-
-%%
-
-
-/* 1.5 Constants */
-
-c_char_sequence:
-		c_char
-		{	$$ = $1;					}
-	|	c_char_sequence c_char
-		{	$$ = gc_string_append(parser_ctx, $1, $2);		}
-	;
-
-c_char:
-		CHAR_STRING_TOKEN
-		{	$$ = yylval.gs;					}
-	|	ESCSEQ
-		{
-			parse_error(parser_ctx, "escape sequences not supported yet");
-		}
-	;
-
-/* 1.6 String literals */
-
-s_char_sequence:
-		s_char
-		{	$$ = $1;					}
-	|	s_char_sequence s_char
-		{	$$ = gc_string_append(parser_ctx, $1, $2);		}
-	;
-
-s_char:
-		CHAR_STRING_TOKEN
-		{	$$ = yylval.gs;					}
-	|	ESCSEQ
-		{
-			parse_error(parser_ctx, "escape sequences not supported yet");
-		}
-	;
-
-primary_expression:
-		DECIMAL_CONSTANT
-		{
-			$$ = make_node(parser_ctx, NODE_EXPRESSION);
-			$$->u.expression.type = AST_EXP_CONSTANT;
-			if (sscanf(yylval.gs->s, "%" WIDTH_u64_SCANF_IS_A_BROKEN_API SCNu64,
-					&$$->u.expression.u.constant) != 1) {
-				parse_error(parser_ctx, "cannot scanf decimal constant");
-			}
-		}
-	|	OCTAL_CONSTANT
-		{
-			$$ = make_node(parser_ctx, NODE_EXPRESSION);
-			$$->u.expression.type = AST_EXP_CONSTANT;
-			if (!strcmp(yylval.gs->s, "0")) {
-				$$->u.expression.u.constant = 0;
-			} else if (sscanf(yylval.gs->s, "0%" WIDTH_o64_SCANF_IS_A_BROKEN_API SCNo64,
-					&$$->u.expression.u.constant) != 1) {
-				parse_error(parser_ctx, "cannot scanf octal constant");
-			}
-		}
-	|	HEXADECIMAL_CONSTANT
-		{
-			$$ = make_node(parser_ctx, NODE_EXPRESSION);
-			$$->u.expression.type = AST_EXP_CONSTANT;
-			if (sscanf(yylval.gs->s, "0x%" WIDTH_x64_SCANF_IS_A_BROKEN_API SCNx64,
-					&$$->u.expression.u.constant) != 1) {
-				parse_error(parser_ctx, "cannot scanf hexadecimal constant");
-			}
-		}
-	|	FLOAT_CONSTANT
-		{
-			$$ = make_node(parser_ctx, NODE_EXPRESSION);
-			$$->u.expression.type = AST_EXP_FLOAT_CONSTANT;
-			if (sscanf(yylval.gs->s, "%" WIDTH_lg_SCANF_IS_A_BROKEN_API "lg",
-					&$$->u.expression.u.float_constant) != 1) {
-				parse_error(parser_ctx, "cannot scanf float constant");
-			}
-		}
-	|	STRING_LITERAL_START DQUOTE
-		{
-			$$ = make_node(parser_ctx, NODE_EXPRESSION);
-			$$->u.expression.type = AST_EXP_STRING;
-			$$->u.expression.u.string = "";
-		}
-	|	STRING_LITERAL_START s_char_sequence DQUOTE
-		{
-			$$ = make_node(parser_ctx, NODE_EXPRESSION);
-			$$->u.expression.type = AST_EXP_STRING;
-			$$->u.expression.u.string = $2->s;
-		}
-	|	CHARACTER_CONSTANT_START c_char_sequence SQUOTE
-		{
-			$$ = make_node(parser_ctx, NODE_EXPRESSION);
-			$$->u.expression.type = AST_EXP_STRING;
-			$$->u.expression.u.string = $2->s;
-		}
-	|	LPAREN expression RPAREN
-		{
-			$$ = make_node(parser_ctx, NODE_EXPRESSION);
-			$$->u.expression.type = AST_EXP_NESTED;
-			$$->u.expression.u.child = $2;
-		}
-	;
-
-identifiers
-	:	IDENTIFIER
-		{
-			$$ = make_node(parser_ctx, NODE_EXPRESSION);
-			$$->u.expression.type = AST_EXP_IDENTIFIER;
-			$$->u.expression.u.identifier = yylval.gs->s;
-		}
-	|	GLOBAL_IDENTIFIER
-		{
-			$$ = make_node(parser_ctx, NODE_EXPRESSION);
-			$$->u.expression.type = AST_EXP_GLOBAL_IDENTIFIER;
-			$$->u.expression.u.identifier = yylval.gs->s;
-		}
-	;
-
-prefix_expression_rec
-	: LSBRAC unary_expression RSBRAC
-		{
-			$$ = $2;
-		}
-	| LSBRAC unary_expression RSBRAC prefix_expression_rec
-		{
-			$$ = $2;
-			$$->u.expression.pre_op = AST_LINK_BRACKET;
-			$$->u.expression.prev = $4;
-		}
-	;
-
-prefix_expression
-	: identifiers
-		{
-			$$ = $1;
-		}
-	| identifiers prefix_expression_rec
-		{
-			$$ = $1;
-			$$->u.expression.pre_op = AST_LINK_BRACKET;
-			$$->u.expression.next_bracket = $2;
-		}
-	;
-
-postfix_expression
-	: prefix_expression
-		{
-			$$ = $1;
-		}
-	| postfix_expression DOT prefix_expression
-		{
-			$$ = $3;
-			$$->u.expression.post_op = AST_LINK_DOT;
-			$$->u.expression.prev = $1;
-		}
-	| postfix_expression RARROW prefix_expression
-		{
-			$$ = $3;
-			$$->u.expression.post_op = AST_LINK_RARROW;
-			$$->u.expression.prev = $1;
-		}
-	;
-
-unary_expression
-	: postfix_expression
-		{	$$ = $1;					}
-	| primary_expression
-		{	$$ = $1;					}
-	| unary_operator unary_expression
-		{
-			$$ = $1;
-			$$->u.unary_op.child = $2;
-		}
-	;
-
-unary_operator
-	: PLUS
-		{
-			$$ = make_node(parser_ctx, NODE_UNARY_OP);
-			$$->u.unary_op.type = AST_UNARY_PLUS;
-		}
-	| MINUS
-		{
-			$$ = make_node(parser_ctx, NODE_UNARY_OP);
-			$$->u.unary_op.type = AST_UNARY_MINUS;
-		}
-	| NOT_OP
-		{
-			$$ = make_node(parser_ctx, NODE_UNARY_OP);
-			$$->u.unary_op.type = AST_UNARY_NOT;
-		}
-	| NOT_BIN
-		{
-			$$ = make_node(parser_ctx, NODE_UNARY_OP);
-			$$->u.unary_op.type = AST_UNARY_BIT_NOT;
-		}
-	;
-
-multiplicative_expression
-	: unary_expression
-		{	$$ = $1;					}
-	| multiplicative_expression STAR unary_expression
-		{
-			$$ = make_op_node(parser_ctx, AST_OP_MUL, $1, $3);
-		}
-	| multiplicative_expression DIV_OP unary_expression
-		{
-			$$ = make_op_node(parser_ctx, AST_OP_DIV, $1, $3);
-		}
-	| multiplicative_expression MOD_OP unary_expression
-		{
-			$$ = make_op_node(parser_ctx, AST_OP_MOD, $1, $3);
-		}
-	;
-
-additive_expression
-	: multiplicative_expression
-		{	$$ = $1;					}
-	| additive_expression PLUS multiplicative_expression
-		{
-			$$ = make_op_node(parser_ctx, AST_OP_PLUS, $1, $3);
-		}
-	| additive_expression MINUS multiplicative_expression
-		{
-			$$ = make_op_node(parser_ctx, AST_OP_MINUS, $1, $3);
-		}
-	;
-
-shift_expression
-	: additive_expression
-		{	$$ = $1;					}
-	| shift_expression LEFT_OP additive_expression
-		{
-			$$ = make_op_node(parser_ctx, AST_OP_BIT_LSHIFT, $1, $3);
-		}
-	| shift_expression RIGHT_OP additive_expression
-		{
-			$$ = make_op_node(parser_ctx, AST_OP_BIT_RSHIFT, $1, $3);
-		}
-	;
-
-and_expression
-	: shift_expression
-		{	$$ = $1;					}
-	| and_expression AND_BIN shift_expression
-		{
-			$$ = make_op_node(parser_ctx, AST_OP_BIT_AND, $1, $3);
-		}
-	;
-
-exclusive_or_expression
-	: and_expression
-		{	$$ = $1;					}
-	| exclusive_or_expression XOR_BIN and_expression
-		{
-			$$ = make_op_node(parser_ctx, AST_OP_BIT_XOR, $1, $3);
-		}
-	;
-
-inclusive_or_expression
-	: exclusive_or_expression
-		{	$$ = $1;					}
-	| inclusive_or_expression OR_BIN exclusive_or_expression
-		{
-			$$ = make_op_node(parser_ctx, AST_OP_BIT_OR, $1, $3);
-		}
-	;
-
-relational_expression
-	: inclusive_or_expression
-		{	$$ = $1;					}
-	| relational_expression LT_OP inclusive_or_expression
-		{
-			$$ = make_op_node(parser_ctx, AST_OP_LT, $1, $3);
-		}
-	| relational_expression GT_OP inclusive_or_expression
-		{
-			$$ = make_op_node(parser_ctx, AST_OP_GT, $1, $3);
-		}
-	| relational_expression LE_OP inclusive_or_expression
-		{
-			$$ = make_op_node(parser_ctx, AST_OP_LE, $1, $3);
-		}
-	| relational_expression GE_OP inclusive_or_expression
-		{
-			$$ = make_op_node(parser_ctx, AST_OP_GE, $1, $3);
-		}
-	;
-
-equality_expression
-	: relational_expression
-		{	$$ = $1;					}
-	| equality_expression EQ_OP relational_expression
-		{
-			$$ = make_op_node(parser_ctx, AST_OP_EQ, $1, $3);
-		}
-	| equality_expression NE_OP relational_expression
-		{
-			$$ = make_op_node(parser_ctx, AST_OP_NE, $1, $3);
-		}
-	;
-
-logical_and_expression
-	: equality_expression
-		{	$$ = $1;					}
-	| logical_and_expression AND_OP equality_expression
-		{
-			$$ = make_op_node(parser_ctx, AST_OP_AND, $1, $3);
-		}
-	;
-
-logical_or_expression
-	: logical_and_expression
-		{	$$ = $1;					}
-	| logical_or_expression OR_OP logical_and_expression
-		{
-			$$ = make_op_node(parser_ctx, AST_OP_OR, $1, $3);
-		}
-	;
-
-expression
-	: logical_or_expression
-		{	$$ = $1;					}
-	;
-
-translation_unit
-	: expression
-		{
-			parser_ctx->ast->root.u.root.child = $1;
-		}
-	;