From 30056ea04ae3ecd828e2a06e12e6f174ae6659c9 Mon Sep 17 00:00:00 2001 From: Andrew Burgess Date: Wed, 8 May 2019 19:01:36 +0100 Subject: [PATCH] gdb/mi: New commands to catch C++ exceptions Adds some MI commands to catch C++ exceptions. The new commands are -catch-throw, -catch-rethrow, and -catch-catch, these all correspond to the CLI commands 'catch throw', 'catch rethrow', and 'catch catch'. Each MI command takes two optional arguments, '-t' has the effect of calling 'tcatch' instead of 'catch', for example: (gdb) -catch-throw -t Is the same as: (gdb) tcatch throw There is also a '-r REGEXP' argument that can supply a regexp to match against the exception type, so: (gdb) -catch-catch -r PATTERN Is the same as: (gdb) catch catch PATTERN The change in print_mention_exception_catchpoint might seem a little strange; changing the output from using ui_out::field_int and ui_out::text to using ui_out::message. The print_mention_exception_catchpoint is used as the 'print_mention' method for the exception catchpoint breakpoint object. Most of the other 'print_mention' methods (see breakpoint.c) use either printf_filtered, of ui_out::message. Using field_int was causing an unexpected field to be added to the MI output. Here's the output without the change in print_mention_exception_catchpoint: (gdb) -catch-throw ^done,bkptno="1",bkpt={number="1",type="breakpoint",disp="keep", enabled="y",addr="0x00000000004006c0", what="exception throw",catch-type="throw", thread-groups=["i1"],times="0"} Notice the breakpoint number appears in both the 'bkptno' field, and the 'number' field within the 'bkpt' tuple. Here's the output with the change in print_mention_exception_catchpoint: (gdb) -catch-throw ^done,bkpt={number="1",type="breakpoint",disp="keep", enabled="y",addr="0x00000000004006c0", what="exception throw",catch-type="throw", thread-groups=["i1"],times="0"} gdb/ChangeLog: * NEWS: Mention new MI commands. * break-catch-throw.c (enum exception_event_kind): Move to breakpoint.h. (print_mention_exception_catchpoint): Output text as a single message. (catch_exception_command_1): Rename to... (catch_exception_event): ...this, make non-static, update header command, and change some parameter types. (catch_catch_command): Update for changes to catch_exception_command_1. (catch_throw_command): Likewise. (catch_rethrow_command): Likewise. * breakpoint.c (enum exception_event_kind): Delete. * breakpoint.h (enum exception_event_kind): Moved here from break-catch-throw.c. (catch_exception_event): Declare. * mi/mi-cmd-catch.c (mi_cmd_catch_exception_event): New function. (mi_cmd_catch_throw): New function. (mi_cmd_catch_rethrow): New function. (mi_cmd_catch_catch): New function. * mi/mi-cmds.c (mi_cmds): Add 'catch-throw', 'catch-rethrow', and 'catch-catch' entries. * mi/mi-cmds.h (mi_cmd_catch_throw): Declare. (mi_cmd_catch_rethrow): Declare. (mi_cmd_catch_catch): Declare. gdb/doc/ChangeLog: * gdb.texinfo (GDB/MI Catchpoint Commands): Add menu entry to new node. (C++ Exception GDB/MI Catchpoint Commands): New node to describe new MI commands. gdb/testsuite/ChangeLog: * gdb.mi/mi-catch-cpp-exceptions.cc: New file. * gdb.mi/mi-catch-cpp-exceptions.exp: New file. * lib/mi-support.exp (mi_expect_stop): Handle 'exception-caught' as a stop reason. --- gdb/ChangeLog | 28 ++++ gdb/NEWS | 4 + gdb/break-catch-throw.c | 42 ++--- gdb/breakpoint.c | 8 - gdb/breakpoint.h | 20 +++ gdb/doc/ChangeLog | 7 + gdb/doc/gdb.texinfo | 140 ++++++++++++++++ gdb/mi/mi-cmd-catch.c | 71 ++++++++ gdb/mi/mi-cmds.c | 6 + gdb/mi/mi-cmds.h | 3 + gdb/testsuite/ChangeLog | 7 + gdb/testsuite/gdb.mi/mi-catch-cpp-exceptions.cc | 73 +++++++++ gdb/testsuite/gdb.mi/mi-catch-cpp-exceptions.exp | 197 +++++++++++++++++++++++ gdb/testsuite/lib/mi-support.exp | 11 +- 14 files changed, 580 insertions(+), 37 deletions(-) create mode 100644 gdb/testsuite/gdb.mi/mi-catch-cpp-exceptions.cc create mode 100644 gdb/testsuite/gdb.mi/mi-catch-cpp-exceptions.exp diff --git a/gdb/ChangeLog b/gdb/ChangeLog index d3b9b8d..4dae9aa 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,33 @@ 2019-06-15 Andrew Burgess + * NEWS: Mention new MI commands. + * break-catch-throw.c (enum exception_event_kind): Move to + breakpoint.h. + (print_mention_exception_catchpoint): Output text as a single + message. + (catch_exception_command_1): Rename to... + (catch_exception_event): ...this, make non-static, update header + command, and change some parameter types. + (catch_catch_command): Update for changes to + catch_exception_command_1. + (catch_throw_command): Likewise. + (catch_rethrow_command): Likewise. + * breakpoint.c (enum exception_event_kind): Delete. + * breakpoint.h (enum exception_event_kind): Moved here from + break-catch-throw.c. + (catch_exception_event): Declare. + * mi/mi-cmd-catch.c (mi_cmd_catch_exception_event): New function. + (mi_cmd_catch_throw): New function. + (mi_cmd_catch_rethrow): New function. + (mi_cmd_catch_catch): New function. + * mi/mi-cmds.c (mi_cmds): Add 'catch-throw', 'catch-rethrow', and + 'catch-catch' entries. + * mi/mi-cmds.h (mi_cmd_catch_throw): Declare. + (mi_cmd_catch_rethrow): Declare. + (mi_cmd_catch_catch): Declare. + +2019-06-15 Andrew Burgess + * annotate.c (annotate_source_line): Change return type to void, update implementation to match. * annotate.h (annotate_source_line): Change return type to void, diff --git a/gdb/NEWS b/gdb/NEWS index 0a3b5b8..2cc82e8 100644 --- a/gdb/NEWS +++ b/gdb/NEWS @@ -213,6 +213,10 @@ maint show test-options-completion-result were to be given as a command itself. This is intended for use by MI frontends in cases when separate CLI and MI channels cannot be used. +-catch-throw, -catch-rethrow, and -catch-catch + These can be used to catch C++ exceptions in a similar fashion to + the CLI commands 'catch throw', 'catch rethrow', and 'catch catch'. + * Testsuite The testsuite now creates the files gdb.cmd (containing the arguments diff --git a/gdb/break-catch-throw.c b/gdb/break-catch-throw.c index a221cb3..107ac74 100644 --- a/gdb/break-catch-throw.c +++ b/gdb/break-catch-throw.c @@ -37,14 +37,6 @@ #include "cp-support.h" #include "location.h" -/* Enums for exception-handling support. */ -enum exception_event_kind -{ - EX_EVENT_THROW, - EX_EVENT_RETHROW, - EX_EVENT_CATCH -}; - /* Each spot where we may place an exception-related catchpoint has two names: the SDT probe point and the function name. This structure holds both. */ @@ -317,12 +309,12 @@ print_mention_exception_catchpoint (struct breakpoint *b) enum exception_event_kind kind = classify_exception_breakpoint (b); bp_temp = b->disposition == disp_del; - uiout->text (bp_temp ? _("Temporary catchpoint ") - : _("Catchpoint ")); - uiout->field_int ("bkptno", b->number); - uiout->text ((kind == EX_EVENT_THROW ? _(" (throw)") - : (kind == EX_EVENT_CATCH ? _(" (catch)") - : _(" (rethrow)")))); + uiout->message ("%s %d %s", + (bp_temp ? _("Temporary catchpoint ") : _("Catchpoint")), + b->number, + (kind == EX_EVENT_THROW + ? _("(throw)") : (kind == EX_EVENT_CATCH + ? _("(catch)") : _("(rethrow)")))); } /* Implement the "print_recreate" breakpoint_ops method for throw and @@ -420,13 +412,11 @@ extract_exception_regexp (const char **string) return std::string (); } -/* Deal with "catch catch", "catch throw", and "catch rethrow" - commands. */ +/* See breakpoint.h. */ -static void -catch_exception_command_1 (enum exception_event_kind ex_event, - const char *arg, - int tempflag, int from_tty) +void +catch_exception_event (enum exception_event_kind ex_event, + const char *arg, bool tempflag, int from_tty) { const char *cond_string = NULL; @@ -456,9 +446,9 @@ static void catch_catch_command (const char *arg, int from_tty, struct cmd_list_element *command) { - int tempflag = get_cmd_context (command) == CATCH_TEMPORARY; + bool tempflag = get_cmd_context (command) == CATCH_TEMPORARY; - catch_exception_command_1 (EX_EVENT_CATCH, arg, tempflag, from_tty); + catch_exception_event (EX_EVENT_CATCH, arg, tempflag, from_tty); } /* Implementation of "catch throw" command. */ @@ -467,9 +457,9 @@ static void catch_throw_command (const char *arg, int from_tty, struct cmd_list_element *command) { - int tempflag = get_cmd_context (command) == CATCH_TEMPORARY; + bool tempflag = get_cmd_context (command) == CATCH_TEMPORARY; - catch_exception_command_1 (EX_EVENT_THROW, arg, tempflag, from_tty); + catch_exception_event (EX_EVENT_THROW, arg, tempflag, from_tty); } /* Implementation of "catch rethrow" command. */ @@ -478,9 +468,9 @@ static void catch_rethrow_command (const char *arg, int from_tty, struct cmd_list_element *command) { - int tempflag = get_cmd_context (command) == CATCH_TEMPORARY; + bool tempflag = get_cmd_context (command) == CATCH_TEMPORARY; - catch_exception_command_1 (EX_EVENT_RETHROW, arg, tempflag, from_tty); + catch_exception_event (EX_EVENT_RETHROW, arg, tempflag, from_tty); } diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c index dce8a0f..ccd778b 100644 --- a/gdb/breakpoint.c +++ b/gdb/breakpoint.c @@ -85,14 +85,6 @@ #include "common/array-view.h" #include "common/gdb_optional.h" -/* Enums for exception-handling support. */ -enum exception_event_kind -{ - EX_EVENT_THROW, - EX_EVENT_RETHROW, - EX_EVENT_CATCH -}; - /* Prototypes for local functions. */ static void map_breakpoint_numbers (const char *, diff --git a/gdb/breakpoint.h b/gdb/breakpoint.h index 3646ea6..9068031 100644 --- a/gdb/breakpoint.h +++ b/gdb/breakpoint.h @@ -42,6 +42,16 @@ struct linespec_result; struct linespec_sals; struct inferior; +/* Enum for exception-handling support in 'catch throw', 'catch rethrow', + 'catch catch' and the MI equivalent. */ + +enum exception_event_kind +{ + EX_EVENT_THROW, + EX_EVENT_RETHROW, + EX_EVENT_CATCH +}; + /* Why are we removing the breakpoint from the target? */ enum remove_bp_reason @@ -1675,4 +1685,14 @@ extern cmd_list_element *commands_cmd_element; extern bool fix_multi_location_breakpoint_output_globally; +/* Deal with "catch catch", "catch throw", and "catch rethrow" commands and + the MI equivalents. Sets up to catch events of type EX_EVENT. When + TEMPFLAG is true only the next matching event is caught after which the + catch-point is deleted. If REGEX is not NULL then only exceptions whose + type name matches REGEX will trigger the event. */ + +extern void catch_exception_event (enum exception_event_kind ex_event, + const char *regex, bool tempflag, + int from_tty); + #endif /* !defined (BREAKPOINT_H) */ diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog index 17048c8..f3142fd 100644 --- a/gdb/doc/ChangeLog +++ b/gdb/doc/ChangeLog @@ -1,3 +1,10 @@ +2019-06-15 Andrew Burgess + + * gdb.texinfo (GDB/MI Catchpoint Commands): Add menu entry to new + node. + (C++ Exception GDB/MI Catchpoint Commands): New node to describe + new MI commands. + 2019-06-13 Pedro Alves * gdb.texinfo (Command Completion): Mention command options too. diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo index a5026df..9a0320e 100644 --- a/gdb/doc/gdb.texinfo +++ b/gdb/doc/gdb.texinfo @@ -29793,6 +29793,7 @@ catchpoints. @menu * Shared Library GDB/MI Catchpoint Commands:: * Ada Exception GDB/MI Catchpoint Commands:: +* C++ Exception GDB/MI Catchpoint Commands:: @end menu @node Shared Library GDB/MI Catchpoint Commands @@ -29992,6 +29993,145 @@ times="0",original-location="__gnat_begin_handler"@} (gdb) @end smallexample +@node C++ Exception GDB/MI Catchpoint Commands +@subsection C@t{++} Exception @sc{gdb/mi} Catchpoints + +The following @sc{gdb/mi} commands can be used to create catchpoints +that stop the execution when C@t{++} exceptions are being throw, rethrown, +or caught. + +@subheading The @code{-catch-throw} Command +@findex -catch-throw + +@subsubheading Synopsis + +@smallexample + -catch-throw [ -t ] [ -r @var{regexp}] +@end smallexample + +Stop when the debuggee throws a C@t{++} exception. If @var{regexp} is +given, then only exceptions whose type matches the regular expression +will be caught. + +If @samp{-t} is given, then the catchpoint is enabled only for one +stop, the catchpoint is automatically deleted after stopping once for +the event. + +@subsubheading @value{GDBN} Command + +The corresponding @value{GDBN} commands are @samp{catch throw} +and @samp{tcatch throw} (@pxref{Set Catchpoints}). + +@subsubheading Example + +@smallexample +-catch-throw -r exception_type +^done,bkpt=@{number="1",type="breakpoint",disp="keep",enabled="y", + addr="0x00000000004006c0",what="exception throw", + catch-type="throw",thread-groups=["i1"], + regexp="exception_type",times="0"@} +(gdb) +-exec-run +^running +(gdb) +~"\n" +~"Catchpoint 1 (exception thrown), 0x00007ffff7ae00ed + in __cxa_throw () from /lib64/libstdc++.so.6\n" +*stopped,bkptno="1",reason="breakpoint-hit",disp="keep", + frame=@{addr="0x00007ffff7ae00ed",func="__cxa_throw", + args=[],from="/lib64/libstdc++.so.6",arch="i386:x86-64"@}, + thread-id="1",stopped-threads="all",core="6" +(gdb) +@end smallexample + +@subheading The @code{-catch-rethrow} Command +@findex -catch-rethrow + +@subsubheading Synopsis + +@smallexample + -catch-rethrow [ -t ] [ -r @var{regexp}] +@end smallexample + +Stop when a C@t{++} exception is re-thrown. If @var{regexp} is given, +then only exceptions whose type matches the regular expression will be +caught. + +If @samp{-t} is given, then the catchpoint is enabled only for one +stop, the catchpoint is automatically deleted after the first event is +caught. + +@subsubheading @value{GDBN} Command + +The corresponding @value{GDBN} commands are @samp{catch rethrow} +and @samp{tcatch rethrow} (@pxref{Set Catchpoints}). + +@subsubheading Example + +@smallexample +-catch-rethrow -r exception_type +^done,bkpt=@{number="1",type="breakpoint",disp="keep",enabled="y", + addr="0x00000000004006c0",what="exception rethrow", + catch-type="rethrow",thread-groups=["i1"], + regexp="exception_type",times="0"@} +(gdb) +-exec-run +^running +(gdb) +~"\n" +~"Catchpoint 1 (exception rethrown), 0x00007ffff7ae00ed + in __cxa_rethrow () from /lib64/libstdc++.so.6\n" +*stopped,bkptno="1",reason="breakpoint-hit",disp="keep", + frame=@{addr="0x00007ffff7ae00ed",func="__cxa_rethrow", + args=[],from="/lib64/libstdc++.so.6",arch="i386:x86-64"@}, + thread-id="1",stopped-threads="all",core="6" +(gdb) +@end smallexample + +@subheading The @code{-catch-catch} Command +@findex -catch-catch + +@subsubheading Synopsis + +@smallexample + -catch-catch [ -t ] [ -r @var{regexp}] +@end smallexample + +Stop when the debuggee catches a C@t{++} exception. If @var{regexp} +is given, then only exceptions whose type matches the regular +expression will be caught. + +If @samp{-t} is given, then the catchpoint is enabled only for one +stop, the catchpoint is automatically deleted after the first event is +caught. + +@subsubheading @value{GDBN} Command + +The corresponding @value{GDBN} commands are @samp{catch catch} +and @samp{tcatch catch} (@pxref{Set Catchpoints}). + +@subsubheading Example + +@smallexample +-catch-catch -r exception_type +^done,bkpt=@{number="1",type="breakpoint",disp="keep",enabled="y", + addr="0x00000000004006c0",what="exception catch", + catch-type="catch",thread-groups=["i1"], + regexp="exception_type",times="0"@} +(gdb) +-exec-run +^running +(gdb) +~"\n" +~"Catchpoint 1 (exception caught), 0x00007ffff7ae00ed + in __cxa_begin_catch () from /lib64/libstdc++.so.6\n" +*stopped,bkptno="1",reason="breakpoint-hit",disp="keep", + frame=@{addr="0x00007ffff7ae00ed",func="__cxa_begin_catch", + args=[],from="/lib64/libstdc++.so.6",arch="i386:x86-64"@}, + thread-id="1",stopped-threads="all",core="6" +(gdb) +@end smallexample + @c %%%%%%%%%%%%%%%%%%%%%%%%%%%% SECTION %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @node GDB/MI Program Context @section @sc{gdb/mi} Program Context diff --git a/gdb/mi/mi-cmd-catch.c b/gdb/mi/mi-cmd-catch.c index 87929c4..a044fe4 100644 --- a/gdb/mi/mi-cmd-catch.c +++ b/gdb/mi/mi-cmd-catch.c @@ -288,3 +288,74 @@ mi_cmd_catch_unload (const char *cmd, char *argv[], int argc) mi_catch_load_unload (0, argv, argc); } +/* Core handler for -catch-throw, -catch-rethrow, and -catch-catch + commands. The argument handling for all of these is identical, we just + pass KIND through to GDB's core to select the correct event type. */ + +static void +mi_cmd_catch_exception_event (enum exception_event_kind kind, + const char *cmd, char *argv[], int argc) +{ + char *regex = NULL; + bool temp = false; + int oind = 0; + char *oarg; + enum opt + { + OPT_TEMP, + OPT_REGEX, + }; + static const struct mi_opt opts[] = + { + { "t", OPT_TEMP, 0 }, + { "r", OPT_REGEX, 1 }, + { 0, 0, 0 } + }; + + for (;;) + { + int opt = mi_getopt (cmd, argc, argv, opts, + &oind, &oarg); + + if (opt < 0) + break; + + switch ((enum opt) opt) + { + case OPT_TEMP: + temp = true; + break; + case OPT_REGEX: + regex = oarg; + break; + } + } + + scoped_restore restore_breakpoint_reporting = setup_breakpoint_reporting (); + catch_exception_event (kind, regex, temp, 0 /* from_tty */); +} + +/* Handler for -catch-throw. */ + +void +mi_cmd_catch_throw (const char *cmd, char *argv[], int argc) +{ + mi_cmd_catch_exception_event (EX_EVENT_THROW, cmd, argv, argc); +} + +/* Handler for -catch-rethrow. */ + +void +mi_cmd_catch_rethrow (const char *cmd, char *argv[], int argc) +{ + mi_cmd_catch_exception_event (EX_EVENT_RETHROW, cmd, argv, argc); +} + +/* Handler for -catch-catch. */ + +void +mi_cmd_catch_catch (const char *cmd, char *argv[], int argc) +{ + mi_cmd_catch_exception_event (EX_EVENT_CATCH, cmd, argv, argc); +} + diff --git a/gdb/mi/mi-cmds.c b/gdb/mi/mi-cmds.c index bbc0e2b..37eab01 100644 --- a/gdb/mi/mi-cmds.c +++ b/gdb/mi/mi-cmds.c @@ -75,6 +75,12 @@ static struct mi_cmd mi_cmds[] = &mi_suppress_notification.breakpoint), DEF_MI_CMD_MI_1 ("catch-unload", mi_cmd_catch_unload, &mi_suppress_notification.breakpoint), + DEF_MI_CMD_MI_1 ("catch-throw", mi_cmd_catch_throw, + &mi_suppress_notification.breakpoint), + DEF_MI_CMD_MI_1 ("catch-rethrow", mi_cmd_catch_rethrow, + &mi_suppress_notification.breakpoint), + DEF_MI_CMD_MI_1 ("catch-catch", mi_cmd_catch_catch, + &mi_suppress_notification.breakpoint), DEF_MI_CMD_MI ("complete", mi_cmd_complete), DEF_MI_CMD_MI ("data-disassemble", mi_cmd_disassemble), DEF_MI_CMD_MI ("data-evaluate-expression", mi_cmd_data_evaluate_expression), diff --git a/gdb/mi/mi-cmds.h b/gdb/mi/mi-cmds.h index 58aa2d6..91ce4cd 100644 --- a/gdb/mi/mi-cmds.h +++ b/gdb/mi/mi-cmds.h @@ -44,6 +44,9 @@ extern mi_cmd_argv_ftype mi_cmd_catch_exception; extern mi_cmd_argv_ftype mi_cmd_catch_handlers; extern mi_cmd_argv_ftype mi_cmd_catch_load; extern mi_cmd_argv_ftype mi_cmd_catch_unload; +extern mi_cmd_argv_ftype mi_cmd_catch_throw; +extern mi_cmd_argv_ftype mi_cmd_catch_rethrow; +extern mi_cmd_argv_ftype mi_cmd_catch_catch; extern mi_cmd_argv_ftype mi_cmd_disassemble; extern mi_cmd_argv_ftype mi_cmd_data_evaluate_expression; extern mi_cmd_argv_ftype mi_cmd_data_list_register_names; diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog index 4c7f59b..94c7348 100644 --- a/gdb/testsuite/ChangeLog +++ b/gdb/testsuite/ChangeLog @@ -1,5 +1,12 @@ 2019-06-15 Andrew Burgess + * gdb.mi/mi-catch-cpp-exceptions.cc: New file. + * gdb.mi/mi-catch-cpp-exceptions.exp: New file. + * lib/mi-support.exp (mi_expect_stop): Handle 'exception-caught' + as a stop reason. + +2019-06-15 Andrew Burgess + * gdb.base/annota1.exp: Update expected results. * gdb.cp/annota2.exp: Likewise. * gdb.cp/annota3.exp: Likewise. diff --git a/gdb/testsuite/gdb.mi/mi-catch-cpp-exceptions.cc b/gdb/testsuite/gdb.mi/mi-catch-cpp-exceptions.cc new file mode 100644 index 0000000..cacda46 --- /dev/null +++ b/gdb/testsuite/gdb.mi/mi-catch-cpp-exceptions.cc @@ -0,0 +1,73 @@ +/* Copyright 2019 Free Software Foundation, Inc. + + This file is part of GDB. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . */ + +class my_exception +{ +private: + int m_value; + +public: + my_exception (int v) + : m_value (v) + { + /* Nothing. */ + } +}; + +void +bar () +{ + my_exception ex (4); + throw ex; /* Throw 1. */ +} + +void +foo () +{ + for (int i = 0; i < 2; ++i) + { + try + { + bar (); + } + catch (const my_exception &ex) /* Catch 1. */ + { + if (i == 1) + throw; /* Throw 2. */ + } + } +} + +int +main () +{ + for (int i = 0; i < 2; ++i) + { + try + { + foo (); + } + catch (const my_exception &ex) /* Catch 2. */ + { + if (i == 1) + return 1; /* Stop here. */ + } + } + + return 0; +} + diff --git a/gdb/testsuite/gdb.mi/mi-catch-cpp-exceptions.exp b/gdb/testsuite/gdb.mi/mi-catch-cpp-exceptions.exp new file mode 100644 index 0000000..b5dfbe6 --- /dev/null +++ b/gdb/testsuite/gdb.mi/mi-catch-cpp-exceptions.exp @@ -0,0 +1,197 @@ +# Copyright 2019 Free Software Foundation, Inc. + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +# Test the -catch-throw, -catch-rethrow, and -catch-catch MI commands. + +if { [skip_cplus_tests] } { continue } + +load_lib mi-support.exp +set MIFLAGS "-i=mi" + +standard_testfile .cc + +if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug c++}] != "" } { + untested "failed to compile" + return -1 +} + +# Grab some line numbers we'll need. +set catch_1_lineno [gdb_get_line_number "Catch 1"] +set catch_2_lineno [gdb_get_line_number "Catch 2"] +set throw_1_lineno [gdb_get_line_number "Throw 1"] +set throw_2_lineno [gdb_get_line_number "Throw 2"] +set main_lineno [gdb_get_line_number "Stop here"] + +# Restart this test, load the test binary and set a breakpoint in +# main. +proc restart_for_test {} { + global srcdir subdir binfile srcfile + global main_lineno + + if {[mi_gdb_start]} { + continue + } + + mi_delete_breakpoints + mi_gdb_reinitialize_dir $srcdir/$subdir + mi_gdb_load ${binfile} + + mi_runto main + + mi_create_breakpoint \ + "$srcfile:${main_lineno}" "break before exiting program" \ + -disp keep -func "main.*" \ + -file ".*mi-catch-cpp-exceptions.cc" -line ${main_lineno} +} + +# Issue an -exec-continue then wait for GDB to catch a C++ exception +# event in FUNC on LINE. Use TESTNAME to make tests unique. +proc continue_to_next_exception { func line testname } { + global hex + + mi_send_resuming_command "exec-continue" \ + "exec-continue" + mi_expect_stop "exception-caught" ".*" ".*" ".*" ".*" \ + {} "run until an exception is caught: $testname" + mi_gdb_test "-stack-list-frames 1 1" \ + "\\^done,stack=\\\[frame=\{level=\"1\",addr=\"$hex\",func=\"${func}\",.*,line=\"${line}\".*\}\\\]" \ + "check previous frame: $testname" +} + +# Issue an -exec-continue and stop at the breakpoint in main. +proc continue_to_breakpoint_in_main {} { + global main_lineno + + mi_send_resuming_command "exec-continue" "exec-continue to main" + mi_expect_stop "breakpoint-hit" "main" ".*" ".*" "${main_lineno}" \ + {.* disp="keep"} "run until breakpoint in main" +} + +# TYPE is one of throw, rethrow, or catch. This proc creates a catch +# point using -catch-TYPE. The optional string EXTRA is any extra +# arguments to pass when setting up the catchpoint. +proc setup_catchpoint {type {extra ""}} { + global decimal + mi_gdb_test "-catch-${type} ${extra}" \ + "\\^done,bkpt=\{number=\"$decimal\".*what=\"exception ${type}\",catch-type=\"${type}\".*\}" \ + "Setup -catch-${type}" +} + +# Ensure that -catch-throw will catch only throws and nothing else. +with_test_prefix "-catch-throw" { + restart_for_test + setup_catchpoint "throw" + continue_to_next_exception "bar" "${throw_1_lineno}" "throw 1" + continue_to_next_exception "bar" "${throw_1_lineno}" "throw 2" + continue_to_next_exception "bar" "${throw_1_lineno}" "throw 3" + continue_to_next_exception "bar" "${throw_1_lineno}" "throw 4" + continue_to_breakpoint_in_main +} + +# Ensure that -catch-rethrow catches only rethrows and nothing else. +with_test_prefix "-catch-rethrow" { + restart_for_test + setup_catchpoint "rethrow" + continue_to_next_exception "foo" "${throw_2_lineno}" "rethrow 1" + continue_to_next_exception "foo" "${throw_2_lineno}" "rethrow 2" + continue_to_breakpoint_in_main +} + +# Ensure that -catch-catch catches only catch points, and nothing +# else. +with_test_prefix "-catch-catch" { + restart_for_test + setup_catchpoint "catch" + continue_to_next_exception "foo" "${catch_1_lineno}" "catch 1" + continue_to_next_exception "foo" "${catch_1_lineno}" "catch 2" + continue_to_next_exception "main" "${catch_2_lineno}" "catch 3" + continue_to_next_exception "foo" "${catch_1_lineno}" "catch 4" + continue_to_next_exception "foo" "${catch_1_lineno}" "catch 5" + continue_to_next_exception "main" "${catch_2_lineno}" "catch 6" + continue_to_breakpoint_in_main +} + +# Now check that all of the command with a regexp that doesn't match, +# don't trigger. +with_test_prefix "all with invalid regexp" { + restart_for_test + setup_catchpoint "throw" "-r blahblah" + setup_catchpoint "rethrow" "-r woofwoof" + setup_catchpoint "catch" "-r miowmiow" + + # Would like to use 'continue_to_breakpoint_in_main' here, if + # there wasn't a bug that requires a use of kfail. + + mi_send_resuming_command "exec-continue" \ + "exec-continue" + set testname "run until breakpoint in main" + gdb_expect { + -re "could not find minimal symbol for typeinfo address.*$mi_gdb_prompt$" { + kfail "gdb/24541" "${testname}" + } + -re "\\*stopped,reason=\"breakpoint-hit\".*func=\"main\".*line=\"${main_lineno}\".*$mi_gdb_prompt$" { + pass "${testname}" + } + timeout { + fail "${testname} (timeout)" + } + } +} + +# Now check that all of the commands with a regexp that does match, +# still trigger. +with_test_prefix "all with valid regexp" { + restart_for_test + setup_catchpoint "throw" "-r my_ex" + setup_catchpoint "rethrow" "-r _except" + setup_catchpoint "catch" "-r my_exception" + continue_to_next_exception "bar" "${throw_1_lineno}" "throw 1" + continue_to_next_exception "foo" "${catch_1_lineno}" "catch 1" + continue_to_next_exception "bar" "${throw_1_lineno}" "throw 2" + continue_to_next_exception "foo" "${catch_1_lineno}" "catch 2" + continue_to_next_exception "foo" "${throw_2_lineno}" "rethrow 1" + continue_to_next_exception "main" "${catch_2_lineno}" "catch 3" + continue_to_next_exception "bar" "${throw_1_lineno}" "throw 3" + continue_to_next_exception "foo" "${catch_1_lineno}" "catch 4" + continue_to_next_exception "bar" "${throw_1_lineno}" "throw 4" + continue_to_next_exception "foo" "${catch_1_lineno}" "catch 5" + continue_to_next_exception "foo" "${throw_2_lineno}" "rethrow 2" + continue_to_next_exception "main" "${catch_2_lineno}" "catch 6" + continue_to_breakpoint_in_main +} + +# Check that the temporary switch works on its own. +with_test_prefix "all with -t" { + restart_for_test + setup_catchpoint "throw" "-t" + setup_catchpoint "rethrow" "-t" + setup_catchpoint "catch" "-t" + continue_to_next_exception "bar" "${throw_1_lineno}" "throw 1" + continue_to_next_exception "foo" "${catch_1_lineno}" "catch 1" + continue_to_next_exception "foo" "${throw_2_lineno}" "rethrow 1" + continue_to_breakpoint_in_main +} + +# Check that the temporary switch works when used with a regexp. +restart_for_test +with_test_prefix "all with -t and regexp" { + setup_catchpoint "throw" "-t -r my_ex" + setup_catchpoint "rethrow" "-t -r _except" + setup_catchpoint "catch" "-t -r my_exception" + continue_to_next_exception "bar" "${throw_1_lineno}" "throw 1" + continue_to_next_exception "foo" "${catch_1_lineno}" "catch 1" + continue_to_next_exception "foo" "${throw_2_lineno}" "rethrow 1" + continue_to_breakpoint_in_main +} diff --git a/gdb/testsuite/lib/mi-support.exp b/gdb/testsuite/lib/mi-support.exp index a58c4f6..8c2c7c8 100644 --- a/gdb/testsuite/lib/mi-support.exp +++ b/gdb/testsuite/lib/mi-support.exp @@ -1221,10 +1221,15 @@ proc mi_expect_stop { reason func args file line extra test } { set args "\\\[$args\\\]" set bn "" + set ebn "" if { $reason == "breakpoint-hit" } { set bn {bkptno="[0-9]+",} } elseif { $reason == "solib-event" } { set bn ".*" + } elseif { $reason == "exception-caught" } { + set ebn {bkptno="[0-9]+",} + set bn ".*" + set reason "breakpoint-hit" } set r "" @@ -1235,9 +1240,9 @@ proc mi_expect_stop { reason func args file line extra test } { set a $after_reason - verbose -log "mi_expect_stop: expecting: \\*stopped,${r}${a}${bn}frame=\{addr=\"$hex\",func=\"$func\",args=$args,(?:file=\"$any$file\",fullname=\"${fullname_syntax}$file\",line=\"$line\",arch=\"$any\"|from=\"$file\")\}$after_stopped,thread-id=\"$decimal\",stopped-threads=$any\r\n($thread_selected_re|$breakpoint_re)*$prompt_re" + verbose -log "mi_expect_stop: expecting: \\*stopped,${ebn}${r}${a}${bn}frame=\{addr=\"$hex\",func=\"$func\",args=$args,(?:file=\"$any$file\",fullname=\"${fullname_syntax}$file\",line=\"$line\",arch=\"$any\"|from=\"$file\")\}$after_stopped,thread-id=\"$decimal\",stopped-threads=$any\r\n($thread_selected_re|$breakpoint_re)*$prompt_re" gdb_expect { - -re "\\*stopped,${r}${a}${bn}frame=\{addr=\"$hex\",func=\"$func\",args=$args,(?:file=\"$any$file\",fullname=\"${fullname_syntax}$file\",line=\"($line)\",arch=\"$any\"|from=\"$file\")\}$after_stopped,thread-id=\"$decimal\",stopped-threads=$any\r\n($thread_selected_re|$breakpoint_re)*$prompt_re" { + -re "\\*stopped,${ebn}${r}${a}${bn}frame=\{addr=\"$hex\",func=\"$func\",args=$args,(?:file=\"$any$file\",fullname=\"${fullname_syntax}$file\",line=\"($line)\",arch=\"$any\"|from=\"$file\")\}$after_stopped,thread-id=\"$decimal\",stopped-threads=$any\r\n($thread_selected_re|$breakpoint_re)*$prompt_re" { pass "$test" if {[array names expect_out "2,string"] != ""} { return $expect_out(2,string) @@ -1245,7 +1250,7 @@ proc mi_expect_stop { reason func args file line extra test } { # No debug info available but $file does match. return 0 } - -re "\\*stopped,${r}${a}${bn}frame=\{addr=\"$hex\",func=\"$any\",args=\[\\\[\{\]$any\[\\\]\}\],file=\"$any\",fullname=\"${fullname_syntax}$any\",line=\"\[0-9\]*\",arch=\"$any\"\}$after_stopped,thread-id=\"$decimal\",stopped-threads=$any\r\n($thread_selected_re|$breakpoint_re)*$prompt_re" { + -re "\\*stopped,${ebn}${r}${a}${bn}frame=\{addr=\"$hex\",func=\"$any\",args=\[\\\[\{\]$any\[\\\]\}\],file=\"$any\",fullname=\"${fullname_syntax}$any\",line=\"\[0-9\]*\",arch=\"$any\"\}$after_stopped,thread-id=\"$decimal\",stopped-threads=$any\r\n($thread_selected_re|$breakpoint_re)*$prompt_re" { verbose -log "got $expect_out(buffer)" fail "$test (stopped at wrong place)" return -1 -- 2.7.4