mirror of
https://github.com/git/git
synced 2024-11-05 18:59:29 +00:00
cbe81e653f
Change the setup of the "pcre2_general_context" to happen per-thread in compile_pcre2_pattern() instead of in grep_init(). This change brings it in line with how the rest of the pcre2_* members in the grep_pat structure are set up. As noted in the preceding commit the approach513f2b0bbd
(grep: make PCRE2 aware of custom allocator, 2019-10-16) took to allocate the pcre2_general_context seems to have been initially based on a misunderstanding of how PCREv2 memory allocation works. The approach of creating a global context in grep_init() is just added complexity for almost zero gain. On my system it's 24 bytes saved per-thread. For comparison PCREv2 will then go on to allocate at least a kilobyte for its own thread-local state. As noted in6d423dd542
(grep: don't redundantly compile throwaway patterns under threading, 2017-05-25) the grep code is intentionally not trying to micro-optimize allocations by e.g. sharing some PCREv2 structures globally, while making others thread-local. So let's remove this special case and make all of them thread-local again for simplicity. With this change we could move the pcre2_{malloc,free} functions around to live closer to their current use. I'm not doing that here to keep this change small, that cleanup will be done in a follow-up commit. See also the discussion in94da9193a6
(grep: add support for PCRE v2, 2017-06-01) about thread safety, and Johannes's comments[1] to the effect that we should be doing what this patch is doing. 1. https://lore.kernel.org/git/nycvar.QRO.7.76.6.1908052120302.46@tvgsbejvaqbjf.bet/ Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
219 lines
5 KiB
C
219 lines
5 KiB
C
#ifndef GREP_H
|
|
#define GREP_H
|
|
#include "color.h"
|
|
#ifdef USE_LIBPCRE2
|
|
#define PCRE2_CODE_UNIT_WIDTH 8
|
|
#include <pcre2.h>
|
|
#if (PCRE2_MAJOR >= 10 && PCRE2_MINOR >= 36) || PCRE2_MAJOR >= 11
|
|
#define GIT_PCRE2_VERSION_10_36_OR_HIGHER
|
|
#endif
|
|
#if (PCRE2_MAJOR >= 10 && PCRE2_MINOR >= 34) || PCRE2_MAJOR >= 11
|
|
#define GIT_PCRE2_VERSION_10_34_OR_HIGHER
|
|
#endif
|
|
#else
|
|
typedef int pcre2_code;
|
|
typedef int pcre2_match_data;
|
|
typedef int pcre2_compile_context;
|
|
typedef int pcre2_general_context;
|
|
#endif
|
|
#ifndef PCRE2_MATCH_INVALID_UTF
|
|
/* PCRE2_MATCH_* dummy also with !USE_LIBPCRE2, for test-pcre2-config.c */
|
|
#define PCRE2_MATCH_INVALID_UTF 0
|
|
#endif
|
|
#include "thread-utils.h"
|
|
#include "userdiff.h"
|
|
|
|
struct repository;
|
|
|
|
enum grep_pat_token {
|
|
GREP_PATTERN,
|
|
GREP_PATTERN_HEAD,
|
|
GREP_PATTERN_BODY,
|
|
GREP_AND,
|
|
GREP_OPEN_PAREN,
|
|
GREP_CLOSE_PAREN,
|
|
GREP_NOT,
|
|
GREP_OR
|
|
};
|
|
|
|
enum grep_context {
|
|
GREP_CONTEXT_HEAD,
|
|
GREP_CONTEXT_BODY
|
|
};
|
|
|
|
enum grep_header_field {
|
|
GREP_HEADER_FIELD_MIN = 0,
|
|
GREP_HEADER_AUTHOR = GREP_HEADER_FIELD_MIN,
|
|
GREP_HEADER_COMMITTER,
|
|
GREP_HEADER_REFLOG,
|
|
|
|
/* Must be at the end of the enum */
|
|
GREP_HEADER_FIELD_MAX
|
|
};
|
|
|
|
enum grep_color {
|
|
GREP_COLOR_CONTEXT,
|
|
GREP_COLOR_FILENAME,
|
|
GREP_COLOR_FUNCTION,
|
|
GREP_COLOR_LINENO,
|
|
GREP_COLOR_COLUMNNO,
|
|
GREP_COLOR_MATCH_CONTEXT,
|
|
GREP_COLOR_MATCH_SELECTED,
|
|
GREP_COLOR_SELECTED,
|
|
GREP_COLOR_SEP,
|
|
NR_GREP_COLORS
|
|
};
|
|
|
|
struct grep_pat {
|
|
struct grep_pat *next;
|
|
const char *origin;
|
|
int no;
|
|
enum grep_pat_token token;
|
|
char *pattern;
|
|
size_t patternlen;
|
|
enum grep_header_field field;
|
|
regex_t regexp;
|
|
pcre2_code *pcre2_pattern;
|
|
pcre2_match_data *pcre2_match_data;
|
|
pcre2_compile_context *pcre2_compile_context;
|
|
pcre2_general_context *pcre2_general_context;
|
|
const uint8_t *pcre2_tables;
|
|
uint32_t pcre2_jit_on;
|
|
unsigned fixed:1;
|
|
unsigned is_fixed:1;
|
|
unsigned ignore_case:1;
|
|
unsigned word_regexp:1;
|
|
};
|
|
|
|
enum grep_expr_node {
|
|
GREP_NODE_ATOM,
|
|
GREP_NODE_NOT,
|
|
GREP_NODE_AND,
|
|
GREP_NODE_TRUE,
|
|
GREP_NODE_OR
|
|
};
|
|
|
|
enum grep_pattern_type {
|
|
GREP_PATTERN_TYPE_UNSPECIFIED = 0,
|
|
GREP_PATTERN_TYPE_BRE,
|
|
GREP_PATTERN_TYPE_ERE,
|
|
GREP_PATTERN_TYPE_FIXED,
|
|
GREP_PATTERN_TYPE_PCRE
|
|
};
|
|
|
|
struct grep_expr {
|
|
enum grep_expr_node node;
|
|
unsigned hit;
|
|
union {
|
|
struct grep_pat *atom;
|
|
struct grep_expr *unary;
|
|
struct {
|
|
struct grep_expr *left;
|
|
struct grep_expr *right;
|
|
} binary;
|
|
} u;
|
|
};
|
|
|
|
struct grep_opt {
|
|
struct grep_pat *pattern_list;
|
|
struct grep_pat **pattern_tail;
|
|
struct grep_pat *header_list;
|
|
struct grep_pat **header_tail;
|
|
struct grep_expr *pattern_expression;
|
|
struct repository *repo;
|
|
const char *prefix;
|
|
int prefix_length;
|
|
regex_t regexp;
|
|
int linenum;
|
|
int columnnum;
|
|
int invert;
|
|
int ignore_case;
|
|
int status_only;
|
|
int name_only;
|
|
int unmatch_name_only;
|
|
int count;
|
|
int word_regexp;
|
|
int fixed;
|
|
int all_match;
|
|
#define GREP_BINARY_DEFAULT 0
|
|
#define GREP_BINARY_NOMATCH 1
|
|
#define GREP_BINARY_TEXT 2
|
|
int binary;
|
|
int allow_textconv;
|
|
int extended;
|
|
int use_reflog_filter;
|
|
int pcre2;
|
|
int relative;
|
|
int pathname;
|
|
int null_following_name;
|
|
int only_matching;
|
|
int color;
|
|
int max_depth;
|
|
int funcname;
|
|
int funcbody;
|
|
int extended_regexp_option;
|
|
int pattern_type_option;
|
|
int ignore_locale;
|
|
char colors[NR_GREP_COLORS][COLOR_MAXLEN];
|
|
unsigned pre_context;
|
|
unsigned post_context;
|
|
unsigned last_shown;
|
|
int show_hunk_mark;
|
|
int file_break;
|
|
int heading;
|
|
void *priv;
|
|
|
|
void (*output)(struct grep_opt *opt, const void *data, size_t size);
|
|
void *output_priv;
|
|
};
|
|
|
|
int grep_config(const char *var, const char *value, void *);
|
|
void grep_init(struct grep_opt *, struct repository *repo, const char *prefix);
|
|
void grep_commit_pattern_type(enum grep_pattern_type, struct grep_opt *opt);
|
|
|
|
void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen, const char *origin, int no, enum grep_pat_token t);
|
|
void append_grep_pattern(struct grep_opt *opt, const char *pat, const char *origin, int no, enum grep_pat_token t);
|
|
void append_header_grep_pattern(struct grep_opt *, enum grep_header_field, const char *);
|
|
void compile_grep_patterns(struct grep_opt *opt);
|
|
void free_grep_patterns(struct grep_opt *opt);
|
|
int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size);
|
|
|
|
struct grep_source {
|
|
char *name;
|
|
|
|
enum grep_source_type {
|
|
GREP_SOURCE_OID,
|
|
GREP_SOURCE_FILE,
|
|
GREP_SOURCE_BUF,
|
|
} type;
|
|
void *identifier;
|
|
|
|
char *buf;
|
|
unsigned long size;
|
|
|
|
char *path; /* for attribute lookups */
|
|
struct userdiff_driver *driver;
|
|
};
|
|
|
|
void grep_source_init(struct grep_source *gs, enum grep_source_type type,
|
|
const char *name, const char *path,
|
|
const void *identifier);
|
|
void grep_source_clear_data(struct grep_source *gs);
|
|
void grep_source_clear(struct grep_source *gs);
|
|
void grep_source_load_driver(struct grep_source *gs,
|
|
struct index_state *istate);
|
|
|
|
|
|
int grep_source(struct grep_opt *opt, struct grep_source *gs);
|
|
|
|
struct grep_opt *grep_opt_dup(const struct grep_opt *opt);
|
|
int grep_threads_ok(const struct grep_opt *opt);
|
|
|
|
/*
|
|
* Mutex used around access to the attributes machinery if
|
|
* opt->use_threads. Must be initialized/destroyed by callers!
|
|
*/
|
|
extern int grep_use_locks;
|
|
extern pthread_mutex_t grep_attr_mutex;
|
|
|
|
#endif
|