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grep branch, master, updated. v3.5-11-gdf33ff8
From: |
Jim Meyering |
Subject: |
grep branch, master, updated. v3.5-11-gdf33ff8 |
Date: |
Sun, 11 Oct 2020 23:36:11 -0400 (EDT) |
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The branch, master has been updated
via df33ff807de40b131ba835ee4b0d27a0577a17ab (commit)
from f31abf786f61f4bdd7134559a5f155fc9c8c2513 (commit)
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- Log -----------------------------------------------------------------
http://git.savannah.gnu.org/cgit/grep.git/commit/?id=df33ff807de40b131ba835ee4b0d27a0577a17ab
commit df33ff807de40b131ba835ee4b0d27a0577a17ab
Author: Jim Meyering <meyering@fb.com>
Date: Sun Oct 4 09:39:39 2020 -0700
grep: -P: report input filename upon PCRE execution failure
Without this, it could be tedious to determine which input
file evokes a PCRE-execution-time failure.
* src/pcresearch.c (Pexecute): When failing, include the
error-provoking file name in the diagnostic.
* src/grep.c (input_filename): Make extern, since used above.
* src/search.h (input_filename): Declare.
* tests/filename-lineno.pl: Test for this.
($no_pcre): Factor out.
* NEWS (Bug fixes): Mention this.
diff --git a/NEWS b/NEWS
index cc2d8f7..ac78589 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,13 @@ GNU grep NEWS -*- outline
-*-
* Noteworthy changes in release ?.? (????-??-??) [?]
+** Bug fixes
+
+ grep -P now reports the troublesome input filename upon PCRE execution
+ failure. Before, searching many files for something rare might fail with
+ just "exceeded PCRE's backtracking limit". Now, it also reports which file
+ triggered the failure.
+
* Noteworthy changes in release 3.5 (2020-09-27) [stable]
diff --git a/src/grep.c b/src/grep.c
index de7616a..bd6ca53 100644
--- a/src/grep.c
+++ b/src/grep.c
@@ -641,7 +641,7 @@ typedef size_t (*execute_fp_t) (void *, char const *,
size_t, size_t *,
static execute_fp_t execute;
static void *compiled_pattern;
-static char const *
+char const *
input_filename (void)
{
if (!filename)
diff --git a/src/pcresearch.c b/src/pcresearch.c
index 6798967..df91ee9 100644
--- a/src/pcresearch.c
+++ b/src/pcresearch.c
@@ -303,25 +303,29 @@ Pexecute (void *vcp, char const *buf, size_t size, size_t
*match_size,
break;
case PCRE_ERROR_NOMEMORY:
- die (EXIT_TROUBLE, 0, _("memory exhausted"));
+ die (EXIT_TROUBLE, 0, _("%s: memory exhausted"), input_filename ());
#if PCRE_STUDY_JIT_COMPILE
case PCRE_ERROR_JIT_STACKLIMIT:
- die (EXIT_TROUBLE, 0, _("exhausted PCRE JIT stack"));
+ die (EXIT_TROUBLE, 0, _("%s: exhausted PCRE JIT stack"),
+ input_filename ());
#endif
case PCRE_ERROR_MATCHLIMIT:
- die (EXIT_TROUBLE, 0, _("exceeded PCRE's backtracking limit"));
+ die (EXIT_TROUBLE, 0, _("%s: exceeded PCRE's backtracking limit"),
+ input_filename ());
case PCRE_ERROR_RECURSIONLIMIT:
- die (EXIT_TROUBLE, 0, _("exceeded PCRE's recursion limit"));
+ die (EXIT_TROUBLE, 0, _("%s: exceeded PCRE's recursion limit"),
+ input_filename ());
default:
/* For now, we lump all remaining PCRE failures into this basket.
If anyone cares to provide sample grep usage that can trigger
particular PCRE errors, we can add to the list (above) of more
detailed diagnostics. */
- die (EXIT_TROUBLE, 0, _("internal PCRE error: %d"), e);
+ die (EXIT_TROUBLE, 0, _("%s: internal PCRE error: %d"),
+ input_filename (), e);
}
return -1;
diff --git a/src/search.h b/src/search.h
index af81dcb..5d98716 100644
--- a/src/search.h
+++ b/src/search.h
@@ -82,6 +82,8 @@ mb_clen (char const *s, size_t n, mbstate_t *mbs)
return len == (size_t) -2 ? mbrlen (s, n, mbs) : len;
}
+extern char const *input_filename (void);
+
_GL_INLINE_HEADER_END
#endif /* GREP_SEARCH_H */
diff --git a/tests/filename-lineno.pl b/tests/filename-lineno.pl
index d44dd7b..42d1b04 100755
--- a/tests/filename-lineno.pl
+++ b/tests/filename-lineno.pl
@@ -37,6 +37,8 @@ $prog = $full_prog_name if $full_prog_name;
# Transform each to this: "Unmatched [..."
my $err_subst = {ERR_SUBST => 's/(: Unmatched \[).*/$1.../'};
+my $no_pcre = "$prog: Perl matching not supported in a --disable-perl-regexp
build\n";
+
my @Tests =
(
# Show that grep now includes filename:lineno in the diagnostic:
@@ -100,13 +102,22 @@ my @Tests =
['invalid-re-P-paren', '-P ")"', {EXIT=>2},
{ERR => $ENV{PCRE_WORKS} == 1
? "$prog: unmatched parentheses\n"
- : "$prog: Perl matching not supported in a --disable-perl-regexp
build\n"
+ : $no_pcre
},
],
['invalid-re-P-star-paren', '-P "a.*)"', {EXIT=>2},
{ERR => $ENV{PCRE_WORKS} == 1
? "$prog: unmatched parentheses\n"
- : "$prog: Perl matching not supported in a --disable-perl-regexp
build\n"
+ : $no_pcre
+ },
+ ],
+
+ # Prior to grep-3.6, the name of the offending file was not printed.
+ ['backtracking-with-file', '-P "((a+)*)+$"', {EXIT=>2},
+ {IN=>{f=>"a"x20 ."b"}},
+ {ERR => $ENV{PCRE_WORKS} == 1
+ ? "$prog: f: exceeded PCRE's backtracking limit\n"
+ : $no_pcre
},
],
-----------------------------------------------------------------------
Summary of changes:
NEWS | 7 +++++++
src/grep.c | 2 +-
src/pcresearch.c | 14 +++++++++-----
src/search.h | 2 ++
tests/filename-lineno.pl | 15 +++++++++++++--
5 files changed, 32 insertions(+), 8 deletions(-)
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