[Bug gdb/30934] Stopping at a breakpoint takes minutes if a source file has long lines

["vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=30934

Tom de Vries <vries at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |vries at gcc dot gnu.org

--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
Reproduced.  Doing a ^C gives us:
...
Breakpoint 1, Solution::numOfSubarrays (this=0x7ffffff9c15f, arr=...) at
test.cpp:56
^C
Thread 1 "gdb" received signal SIGINT, Interrupt.
0x00007ffff5a42870 in
boost::re_detail_106600::perl_matcher<__gnu_cxx::__normal_iterator<char const*,
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >
>, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*,
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >
> > >, boost::regex_traits<char, boost::cpp_regex_traits<char> >
>::find_restart_word() () from /usr/lib64/libsource-highlight.so.4
(gdb) bt
#0  0x00007ffff5a42870 in
boost::re_detail_106600::perl_matcher<__gnu_cxx::__normal_iterator<char const*,
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >
>, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*,
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >
> > >, boost::regex_traits<char, boost::cpp_regex_traits<char> >
>::find_restart_word() ()
   from /usr/lib64/libsource-highlight.so.4
#1  0x00007ffff5a3ef74 in
boost::re_detail_106600::perl_matcher<__gnu_cxx::__normal_iterator<char const*,
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >
>, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*,
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >
> > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::find_imp()
() from /usr/lib64/libsource-highlight.so.4
#2  0x00007ffff5a87c21 in
srchilite::RegexHighlightRule::tryToMatch(__gnu_cxx::__normal_iterator<char
const*, std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> > >, __gnu_cxx::__normal_iterator<char const*,
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >
>, srchilite::HighlightToken&, srchilite::MatchingParameters const&) () from
/usr/lib64/libsource-highlight.so.4
#3  0x00007ffff5a69781 in
srchilite::HighlightState::findBestMatch(__gnu_cxx::__normal_iterator<char
const*, std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> > >, __gnu_cxx::__normal_iterator<char const*,
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >
>, srchilite::HighlightToken&, srchilite::MatchingParameters const&) const ()
from /usr/lib64/libsource-highlight.so.4
#4  0x00007ffff5a6c5b5 in
srchilite::SourceHighlighter::highlightParagraph(std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> > const&) () from
/usr/lib64/libsource-highlight.so.4
#5  0x00007ffff5a6dcc9 in
srchilite::SourceFileHighlighter::highlight(std::istream&) ()
   from /usr/lib64/libsource-highlight.so.4
#6  0x00007ffff5a4f52b in srchilite::SourceHighlight::highlight(std::istream&,
std::ostream&, std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> > const&, std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char> > const&) () from
/usr/lib64/libsource-highlight.so.4
#7  0x00000000009d9ab3 in source_cache::ensure (this=this@entry=0x21c8740
<g_source_cache>, s=0x25db0a0)
    at /data/vries/gdb/src/gdb/source-cache.c:254
#8  0x00000000009dab49 in source_cache::get_source_lines (this=0x21c8740
<g_source_cache>, s=s@entry=0x25db0a0, 
    first_line=first_line@entry=56, last_line=last_line@entry=56,
lines=lines@entry=0x7fffffffcbb0)
    at /data/vries/gdb/src/gdb/source-cache.c:364
#9  0x00000000009dedbd in print_source_lines_base (s=s@entry=0x25db0a0,
line=line@entry=56, 
    stopline=stopline@entry=57, flags=...) at
/data/vries/gdb/src/gdb/source.c:1387
#10 0x00000000009df1d5 in print_source_lines (s=s@entry=0x25db0a0,
line=line@entry=56, stopline=stopline@entry=57, 
    flags=..., flags@entry=...) at /data/vries/gdb/src/gdb/source.c:1474
#11 0x0000000000a0aa4d in print_frame_info (fp_opts=..., frame=...,
print_level=print_level@entry=0, 
    print_what=<optimized out>, print_what@entry=SRC_AND_LOC,
print_args=print_args@entry=1, 
    set_current_sal=set_current_sal@entry=1) at
/data/vries/gdb/src/gdb/stack.c:1164
#12 0x0000000000a0b048 in print_stack_frame (frame=...,
print_level=print_level@entry=0, 
    print_what=print_what@entry=SRC_AND_LOC,
set_current_sal=set_current_sal@entry=1)
    at /data/vries/gdb/src/gdb/stack.c:367
#13 0x0000000000740fef in print_stop_location (ws=<synthetic pointer>...) at
/data/vries/gdb/src/gdb/infrun.c:8785
#14 print_stop_event (uiout=0x2529d30, displays=<optimized out>) at
/data/vries/gdb/src/gdb/infrun.c:8801
#15 0x000000000075c9e3 in interps_notify<bpstat*, int> (method=&virtual
interp::on_normal_stop(bpstat*, int))
    at /data/vries/gdb/src/gdb/interps.c:369
#16 interps_notify_normal_stop (bs=bs@entry=0x26ef7f0,
print_frame=print_frame@entry=1)
    at /data/vries/gdb/src/gdb/interps.c:402
#17 0x0000000000741a2e in notify_normal_stop (print_frame=1, bs=0x26ef7f0) at
/data/vries/gdb/src/gdb/infrun.c:6371
#18 normal_stop () at /data/vries/gdb/src/gdb/infrun.c:9065
#19 0x000000000074f9b1 in fetch_inferior_event () at
/data/vries/gdb/src/gdb/infrun.c:4512
#20 0x0000000000fdaf2d in gdb_wait_for_event (block=block@entry=0)
    at /data/vries/gdb/src/gdbsupport/event-loop.cc:694
#21 0x0000000000fdb67f in gdb_do_one_event (mstimeout=mstimeout@entry=-1)
    at /data/vries/gdb/src/gdbsupport/event-loop.cc:217
#22 0x0000000000a6d109 in wait_sync_command_done () at
/data/vries/gdb/src/gdb/top.c:427
#23 0x0000000000a70155 in maybe_wait_sync_command_done (was_sync=0) at
/data/vries/gdb/src/gdb/top.c:444
#24 execute_command (p=<optimized out>, p@entry=<error reading variable: value
has been optimized out>, from_tty=1, 
    from_tty@entry=<error reading variable: value has been optimized out>) at
/data/vries/gdb/src/gdb/top.c:577
#25 0x00000000007c7675 in catch_command_errors (command=<optimized out>,
arg=<optimized out>, 
    from_tty=<optimized out>, do_bp_actions=do_bp_actions@entry=true) at
/data/vries/gdb/src/gdb/main.c:518
#26 0x00000000007c77af in execute_cmdargs
(cmdarg_vec=cmdarg_vec@entry=0x7fffffffd810, 
    file_type=file_type@entry=CMDARG_FILE,
cmd_type=cmd_type@entry=CMDARG_COMMAND, ret=ret@entry=0x7fffffffd7fc)
    at /data/vries/gdb/src/gdb/main.c:617
#27 0x00000000007c8ee7 in captured_main_1
(context=context@entry=0x7fffffffda00)
    at /data/vries/gdb/src/gdb/main.c:1293
#28 0x00000000007c991b in captured_main (data=data@entry=0x7fffffffda00) at
/data/vries/gdb/src/gdb/main.c:1314
#29 gdb_main (args=args@entry=0x7fffffffda20) at
/data/vries/gdb/src/gdb/main.c:1343
#30 0x0000000000427fb5 in main (argc=18, argv=0x7fffffffdb48) at
/data/vries/gdb/src/gdb/gdb.c:39
(gdb) 
...

Seems to be stuck in srchilite::SourceHighlighter::highlightParagraph.

-- 
You are receiving this mail because:
You are on the CC list for the bug.