diff options
Diffstat (limited to 'grep.c')
| -rw-r--r-- | grep.c | 26 |
1 files changed, 26 insertions, 0 deletions
@@ -477,6 +477,8 @@ static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt int options = PCRE2_MULTILINE; const uint8_t *character_tables = NULL; int jitret; + int patinforet; + size_t jitsizearg; assert(opt->pcre2); @@ -511,6 +513,30 @@ static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt jitret = pcre2_jit_compile(p->pcre2_pattern, PCRE2_JIT_COMPLETE); if (jitret) die("Couldn't JIT the PCRE2 pattern '%s', got '%d'\n", p->pattern, jitret); + + /* + * The pcre2_config(PCRE2_CONFIG_JIT, ...) call just + * tells us whether the library itself supports JIT, + * but to see whether we're going to be actually using + * JIT we need to extract PCRE2_INFO_JITSIZE from the + * pattern *after* we do pcre2_jit_compile() above. + * + * This is because if the pattern contains the + * (*NO_JIT) verb (see pcre2syntax(3)) + * pcre2_jit_compile() will exit early with 0. If we + * then proceed to call pcre2_jit_match() further down + * the line instead of pcre2_match() we'll either + * segfault (pre PCRE 10.31) or run into a fatal error + * (post PCRE2 10.31) + */ + patinforet = pcre2_pattern_info(p->pcre2_pattern, PCRE2_INFO_JITSIZE, &jitsizearg); + if (patinforet) + BUG("pcre2_pattern_info() failed: %d", patinforet); + if (jitsizearg == 0) { + p->pcre2_jit_on = 0; + return; + } + p->pcre2_jit_stack = pcre2_jit_stack_create(1, 1024 * 1024, NULL); if (!p->pcre2_jit_stack) die("Couldn't allocate PCRE2 JIT stack"); |