[lttng-tools.git] / src / common / filter / filter-ast.h

#ifndef _FILTER_AST_H
#define _FILTER_AST_H

/*
 * filter-ast.h
 *
 * LTTng filter AST
 *
 * Copyright 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * SPDX-License-Identifier: LGPL-2.1-only
 *
 */

/*
 * Note: filter-ast.h should be included before filter-parser.h.
 */

#include <urcu/list.h>
#include <stdio.h>
#include <stdint.h>

#define printf_debug(fmt, args...)					\
	do {								\
		if (filter_parser_debug)				\
			fprintf(stdout, "[debug] " fmt, ## args);	\
	} while (0)

// the parameter name (of the reentrant 'yyparse' function)
// data is a pointer to a 'SParserParam' structure
//#define YYPARSE_PARAM	parser_ctx

#ifndef YY_TYPEDEF_YY_SCANNER_T
#define YY_TYPEDEF_YY_SCANNER_T
typedef void* yyscan_t;
#endif

extern int filter_parser_debug;

struct filter_node;
struct filter_parser;

enum node_type {
	NODE_UNKNOWN = 0,
	NODE_ROOT,

	NODE_EXPRESSION,
	NODE_OP,
	NODE_UNARY_OP,

	NR_NODE_TYPES,
};

enum op_type {
	AST_OP_UNKNOWN = 0,
	AST_OP_MUL,
	AST_OP_DIV,
	AST_OP_MOD,
	AST_OP_PLUS,
	AST_OP_MINUS,
	AST_OP_BIT_RSHIFT,
	AST_OP_BIT_LSHIFT,
	AST_OP_AND,
	AST_OP_OR,
	AST_OP_BIT_AND,
	AST_OP_BIT_OR,
	AST_OP_BIT_XOR,

	AST_OP_EQ,
	AST_OP_NE,
	AST_OP_GT,
	AST_OP_LT,
	AST_OP_GE,
	AST_OP_LE,
};

enum unary_op_type {
	AST_UNARY_UNKNOWN = 0,
	AST_UNARY_PLUS,
	AST_UNARY_MINUS,
	AST_UNARY_NOT,
	AST_UNARY_BIT_NOT,
};

enum ast_link_type {
	AST_LINK_UNKNOWN = 0,
	AST_LINK_DOT,
	AST_LINK_RARROW,
	AST_LINK_BRACKET,
};

enum ast_expt_type {
	AST_EXP_UNKNOWN = 0,
	AST_EXP_STRING,
	AST_EXP_CONSTANT,
	AST_EXP_FLOAT_CONSTANT,
	AST_EXP_IDENTIFIER,
	AST_EXP_GLOBAL_IDENTIFIER,
	AST_EXP_NESTED,
};

struct filter_node {
	/*
	 * Parent node is only set on demand by specific visitor.
	 */
	struct filter_node *parent;
	struct cds_list_head gc;

	enum node_type type;
	union {
		struct {
			/* Avoid -Wextern-c-compat warning with clang++. */
			char unused;
		} unknown;
		struct {
			struct filter_node *child;
		} root;
		struct {
			enum ast_expt_type type;
			enum ast_link_type post_op;	/* reverse */
			enum ast_link_type pre_op;	/* forward */
			union {
				const char *string;
				uint64_t constant;
				double float_constant;
				const char *identifier;
				/*
				 * child can be nested.
				 */
				struct filter_node *child;
			} u;
			/* prev: backward dot/arrow chain (postfix expression) */
			struct filter_node *prev;
			/* next: forward dot/arrow chain, generated by a visitor. */
			struct filter_node *next;
			/* next_bracket: linked bracket chain (prefix expression) */
			struct filter_node *next_bracket;
		} expression;
		struct {
			enum op_type type;
			struct filter_node *lchild;
			struct filter_node *rchild;
		} op;
		struct {
			enum unary_op_type type;
			struct filter_node *child;
		} unary_op;
	} u;
};

struct filter_ast {
	struct filter_node root;
	struct cds_list_head allocated_nodes;
};

const char *node_type(struct filter_node *node);

struct ir_op;

struct filter_parser_ctx {
	yyscan_t scanner;
	struct filter_ast *ast;
	struct cds_list_head allocated_strings;
	struct ir_op *ir_root;
	struct lttng_bytecode_alloc *bytecode;
	struct lttng_bytecode_alloc *bytecode_reloc;
};

struct filter_parser_ctx *filter_parser_ctx_alloc(FILE *input);
void filter_parser_ctx_free(struct filter_parser_ctx *parser_ctx);
int filter_parser_ctx_append_ast(struct filter_parser_ctx *parser_ctx);
int filter_parser_ctx_create_from_filter_expression(
		const char *filter_expression, struct filter_parser_ctx **ctxp);

static inline
struct filter_ast *filter_parser_get_ast(struct filter_parser_ctx *parser_ctx)
{
	return parser_ctx->ast;
}

int filter_visitor_print_xml(struct filter_parser_ctx *ctx, FILE *stream,
			int indent);
int filter_visitor_ir_generate(struct filter_parser_ctx *ctx);
void filter_ir_free(struct filter_parser_ctx *ctx);
int filter_visitor_bytecode_generate(struct filter_parser_ctx *ctx);
void filter_bytecode_free(struct filter_parser_ctx *ctx);
int filter_visitor_ir_check_binary_op_nesting(struct filter_parser_ctx *ctx);
int filter_visitor_ir_check_binary_comparator(struct filter_parser_ctx *ctx);
int filter_visitor_ir_validate_string(struct filter_parser_ctx *ctx);
int filter_visitor_ir_normalize_glob_patterns(struct filter_parser_ctx *ctx);
int filter_visitor_ir_validate_globbing(struct filter_parser_ctx *ctx);

#endif /* _FILTER_AST_H */
Commit	Line	Data
953192ba MD	1	#ifndef _FILTER_AST_H
	2	#define _FILTER_AST_H
	3
	4	/*
	5	* filter-ast.h
	6	*
	7	* LTTng filter AST
	8	*
ab5be9fa	9	* Copyright 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
953192ba	10	*
ab5be9fa	11	* SPDX-License-Identifier: LGPL-2.1-only
953192ba	12	*
953192ba MD	13	*/
953192ba MD	14
95b9bd90 MD	15	/*
	16	* Note: filter-ast.h should be included before filter-parser.h.
	17	*/
	18
953192ba	19	#include <urcu/list.h>
0ae3cfc6	20	#include <stdio.h>
953192ba MD	21	#include <stdint.h>
	22
	23	#define printf_debug(fmt, args...) \
	24	do { \
	25	if (filter_parser_debug) \
	26	fprintf(stdout, "[debug] " fmt, ## args); \
	27	} while (0)
	28
af71d06b MD	29	// the parameter name (of the reentrant 'yyparse' function)
	30	// data is a pointer to a 'SParserParam' structure
	31	//#define YYPARSE_PARAM parser_ctx
	32
953192ba MD	33	#ifndef YY_TYPEDEF_YY_SCANNER_T
	34	#define YY_TYPEDEF_YY_SCANNER_T
	35	typedef void* yyscan_t;
	36	#endif
	37
	38	extern int filter_parser_debug;
	39
	40	struct filter_node;
	41	struct filter_parser;
	42
	43	enum node_type {
	44	NODE_UNKNOWN = 0,
	45	NODE_ROOT,
	46
	47	NODE_EXPRESSION,
	48	NODE_OP,
	49	NODE_UNARY_OP,
	50
	51	NR_NODE_TYPES,
	52	};
	53
	54	enum op_type {
	55	AST_OP_UNKNOWN = 0,
	56	AST_OP_MUL,
	57	AST_OP_DIV,
	58	AST_OP_MOD,
	59	AST_OP_PLUS,
	60	AST_OP_MINUS,
116d3c01 MD	61	AST_OP_BIT_RSHIFT,
116d3c01 MD	62	AST_OP_BIT_LSHIFT,
953192ba MD	63	AST_OP_AND,
953192ba MD	64	AST_OP_OR,
bff988fa MD	65	AST_OP_BIT_AND,
	66	AST_OP_BIT_OR,
	67	AST_OP_BIT_XOR,
953192ba MD	68
	69	AST_OP_EQ,
	70	AST_OP_NE,
	71	AST_OP_GT,
	72	AST_OP_LT,
	73	AST_OP_GE,
	74	AST_OP_LE,
	75	};
	76
	77	enum unary_op_type {
	78	AST_UNARY_UNKNOWN = 0,
	79	AST_UNARY_PLUS,
	80	AST_UNARY_MINUS,
	81	AST_UNARY_NOT,
bff988fa	82	AST_UNARY_BIT_NOT,
953192ba MD	83	};
	84
	85	enum ast_link_type {
	86	AST_LINK_UNKNOWN = 0,
	87	AST_LINK_DOT,
	88	AST_LINK_RARROW,
661dfdd1	89	AST_LINK_BRACKET,
953192ba MD	90	};
953192ba MD	91
348ddc5c SM	92	enum ast_expt_type {
	93	AST_EXP_UNKNOWN = 0,
	94	AST_EXP_STRING,
	95	AST_EXP_CONSTANT,
	96	AST_EXP_FLOAT_CONSTANT,
	97	AST_EXP_IDENTIFIER,
	98	AST_EXP_GLOBAL_IDENTIFIER,
	99	AST_EXP_NESTED,
	100	};
	101
953192ba MD	102	struct filter_node {
	103	/*
	104	* Parent node is only set on demand by specific visitor.
	105	*/
	106	struct filter_node *parent;
	107	struct cds_list_head gc;
	108
	109	enum node_type type;
	110	union {
	111	struct {
48a40005 SM	112	/* Avoid -Wextern-c-compat warning with clang++. */
48a40005 SM	113	char unused;
953192ba MD	114	} unknown;
	115	struct {
	116	struct filter_node *child;
	117	} root;
	118	struct {
348ddc5c	119	enum ast_expt_type type;
953192ba MD	120	enum ast_link_type post_op; /* reverse */
	121	enum ast_link_type pre_op; /* forward */
	122	union {
b53d4e59	123	const char *string;
953192ba	124	uint64_t constant;
e90d8561	125	double float_constant;
b53d4e59	126	const char *identifier;
953192ba MD	127	/*
	128	* child can be nested.
	129	*/
	130	struct filter_node *child;
	131	} u;
bff988fa	132	/* prev: backward dot/arrow chain (postfix expression) */
953192ba	133	struct filter_node *prev;
bff988fa	134	/* next: forward dot/arrow chain, generated by a visitor. */
953192ba	135	struct filter_node *next;
bff988fa MD	136	/* next_bracket: linked bracket chain (prefix expression) */
bff988fa MD	137	struct filter_node *next_bracket;
953192ba MD	138	} expression;
	139	struct {
	140	enum op_type type;
	141	struct filter_node *lchild;
	142	struct filter_node *rchild;
	143	} op;
	144	struct {
	145	enum unary_op_type type;
	146	struct filter_node *child;
	147	} unary_op;
	148	} u;
	149	};
	150
	151	struct filter_ast {
	152	struct filter_node root;
	153	struct cds_list_head allocated_nodes;
	154	};
	155
	156	const char node_type(struct filter_node node);
	157
	158	struct ir_op;
953192ba MD	159
	160	struct filter_parser_ctx {
	161	yyscan_t scanner;
	162	struct filter_ast *ast;
	163	struct cds_list_head allocated_strings;
	164	struct ir_op *ir_root;
2b00d462 SM	165	struct lttng_bytecode_alloc *bytecode;
2b00d462 SM	166	struct lttng_bytecode_alloc *bytecode_reloc;
953192ba MD	167	};
	168
	169	struct filter_parser_ctx filter_parser_ctx_alloc(FILE input);
	170	void filter_parser_ctx_free(struct filter_parser_ctx *parser_ctx);
	171	int filter_parser_ctx_append_ast(struct filter_parser_ctx *parser_ctx);
e4d2f27a JR	172	int filter_parser_ctx_create_from_filter_expression(
e4d2f27a JR	173	const char filter_expression, struct filter_parser_ctx *ctxp);
953192ba MD	174
	175	static inline
	176	struct filter_ast filter_parser_get_ast(struct filter_parser_ctx parser_ctx)
	177	{
	178	return parser_ctx->ast;
	179	}
	180
953192ba MD	181	int filter_visitor_print_xml(struct filter_parser_ctx ctx, FILE stream,
	182	int indent);
	183	int filter_visitor_ir_generate(struct filter_parser_ctx *ctx);
	184	void filter_ir_free(struct filter_parser_ctx *ctx);
	185	int filter_visitor_bytecode_generate(struct filter_parser_ctx *ctx);
	186	void filter_bytecode_free(struct filter_parser_ctx *ctx);
	187	int filter_visitor_ir_check_binary_op_nesting(struct filter_parser_ctx *ctx);
	188	int filter_visitor_ir_check_binary_comparator(struct filter_parser_ctx *ctx);
dcd5daf2	189	int filter_visitor_ir_validate_string(struct filter_parser_ctx *ctx);
9f449915 PP	190	int filter_visitor_ir_normalize_glob_patterns(struct filter_parser_ctx *ctx);
9f449915 PP	191	int filter_visitor_ir_validate_globbing(struct filter_parser_ctx *ctx);
953192ba MD	192
953192ba MD	193	#endif /* _FILTER_AST_H */