Re: [patch] PR gdb/1665 pending catch/throw catchpoints

Daniel Jacobowitz
2008-06-05T16:06:07Z

Sorry for the delay.

On Fri, May 02, 2008 at 01:43:13PM -0400, Aleksandar Ristovski wrote:
>>> +gdb_test "tbreak main" "Temporary breakpoint 3.*" \
>>> + "Set temporary breakpoint at main"
>>> +
>>> +gdb_test "run" "Temporary breakpoint 3,.*" "Run to main"
>>
>> There's runto_main, use that instead; it handles remote targets and so
>> forth.
>
> Yeah, but it wouldn't work in my case as it deletes breakpoints automagically. I introduced new runto_main_new that accepts options like temporary-break and keep-breakpoints.

In that case, you just need gdb_run_cmd instead of runto_main. Then
you can expect exactly the output you need.

With that changed (replacement patch attached) I get:

continue
Continuing.
Catchpoint 2 (thrown), 0x00026610 in __cxa_throw ()
(gdb) FAIL: gdb.cp/exception.exp: continue to first throw

continue
Continuing.
Catchpoint 1 (caught), 0x00025094 in __cxa_begin_catch ()
(gdb) FAIL: gdb.cp/exception.exp: continue to first catch

continue
Continuing.
Got an except 13
Catchpoint 2 (thrown), 0x00026610 in __cxa_throw ()
(gdb) FAIL: gdb.cp/exception.exp: continue to second throw

continue
Continuing.
Catchpoint 1 (caught), 0x00025094 in __cxa_begin_catch ()
(gdb) FAIL: gdb.cp/exception.exp: continue to second catch

Did you deliberately replace (exception thrown) with (thrown)
in your 2008-05-28 patch to print_exception_catchpoint?

--
Daniel Jacobowitz
CodeSourcery

Index: exception.exp
===================================================================
RCS file: /cvs/src/src/gdb/testsuite/gdb.cp/exception.exp,v
retrieving revision 1.12
diff -u -p -r1.12 exception.exp
--- exception.exp 1 Jan 2008 22:53:19 -0000 1.12
+++ exception.exp 5 Jun 2008 16:05:09 -0000
@@ -27,10 +27,6 @@
# Static-linked executables use a different mechanism to get the
# address of the notification hook in the C++ support library.

-# TODO: this file is not ready for production yet. If you are working
-# on C++ exception support for gdb, you can take out the "continue"
-# statement and try your luck. -- chastain 2004-01-09
-
# TODO: this file has many absolute line numbers.
# Replace them with gdb_get_line_number.

@@ -67,56 +63,69 @@ gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}

-if ![runto_main] then {
- perror "couldn't run to breakpoint"
- continue
-}
-
-# As I said before, this test script is not ready yet!
-
-continue
-
# Set a catch catchpoint

-gdb_test "catch catch" "Catchpoint \[0-9\]+ \\(catch\\)"
+gdb_test "catch catch" "Catchpoint \[0-9\]+ \\(catch\\)" \
+ "catch catch (before inferior run)"

# Set a throw catchpoint

gdb_test "catch throw" "Catchpoint \[0-9\]+ \\(throw\\)" \
- "catch throw (static executable)"
+ "catch throw (before inferior run)"

-# The catchpoints should be listed in the list of breakpoints.

+# The catchpoints should be listed in the list of breakpoints.
+# In case of a statically linked test, we won't have a pending breakpoint.
+# Hence we allow for both an address or "<PENDING>". If we ever become able
+# to tell whether the target is linked statically or not, we can be more
+# precise and require exact output.
+set addr "\(<PENDING>|$hex\)"
set re_head "Num${ws}Type${ws}Disp${ws}Enb${ws}Address${ws}What"
-set re_1_main "1${ws}breakpoint${ws}keep${ws}y${ws}$hex${ws}in main.*breakpoint already hit.*"
-set re_2_catch "2${ws}catch catch${ws}keep${ws}y${ws}$hex${ws}exception catch"
-set re_3_catch "3${ws}catch throw${ws}keep${ws}y${ws}$hex${ws}exception throw"
-set re_2_bp "2${ws}breakpoint${ws}keep${ws}y${ws}$hex${ws}exception catch"
-set re_3_bp "3${ws}breakpoint${ws}keep${ws}y${ws}$hex${ws}exception throw"
+set re_2_bp "1${ws}breakpoint${ws}keep${ws}y${ws}$addr${ws}exception catch"
+set re_3_bp "2${ws}breakpoint${ws}keep${ws}y${ws}$addr${ws}exception throw"

-set name "info breakpoints"
+set name "info breakpoints (before inferior run)"
gdb_test_multiple "info breakpoints" $name {
- -re "$re_head${ws}$re_1_main${ws}$re_2_catch${ws}$re_3_catch\r\n$gdb_prompt $" {
+ -re "$re_head${ws}$re_2_bp${ws}$re_3_bp\r\n$gdb_prompt $" {
pass $name
}
- -re "$re_head${ws}$re_1_main${ws}$re_2_bp${ws}$re_3_bp\r\n$gdb_prompt $" {
- # TODO: gdb HEAD 2004-01-08 does this. Is this okay?
- unresolved $name
- }
+ -re ".*$gdb_prompt $"
+ {
+ fail $name
+ }
}

-# Some targets support "info catch".
-# Some do not.
+gdb_test "tbreak main" "Temporary breakpoint 3.*" \
+ "Set temporary breakpoint at main"

-set name "info catch"
-gdb_test_multiple "info catch" $name {
- -re "Info catch not supported with this target/compiler combination.\r\n$gdb_prompt $" {
- unsupported $name
+set ok 0
+gdb_run_cmd
+gdb_test_multiple "" "Run to main" {
+ -re "Temporary breakpoint 3,.*$gdb_prompt $" {
+ pass "Run to main"
+ set ok 1
}
- -re "No catches.\r\n$gdb_prompt $" {
- # TODO: gdb HEAD 2004-01-08 does this. Is this okay?
- unresolved $name
+}
+
+if { !$ok } {
+ continue
+}
+
+set addr "$hex"
+set re_head "Num${ws}Type${ws}Disp${ws}Enb${ws}Address${ws}What"
+set re_2_bp "1${ws}breakpoint${ws}keep${ws}y${ws}$addr${ws}exception catch"
+set re_3_bp "2${ws}breakpoint${ws}keep${ws}y${ws}$addr${ws}exception throw"
+
+set name "info breakpoints (after inferior run)"
+gdb_test_multiple "info breakpoints" $name {
+ -re "$re_head${ws}$re_2_bp${ws}$re_3_bp\r\n$gdb_prompt $" {
+ pass $name
}
+ -re ".*$gdb_prompt $"
+ {
+ send_user "\n---\n$expect_out(buffer)\n---\n"
+ fail $name
+ }
}

# Get the first exception thrown
@@ -127,8 +136,7 @@ gdb_test_multiple "continue" $name {
pass $name
}
-re "Continuing.${ws}Catchpoint \[0-9\]+ \\(exception thrown\\)\r\n.*\r\n$gdb_prompt $" {
- # TODO: gdb HEAD 2004-01-08 does this. Is this okay?
- unresolved $name
+ pass $name
}
}

@@ -137,7 +145,7 @@ gdb_test_multiple "continue" $name {

set name "backtrace after first throw"
gdb_test_multiple "backtrace" $name {
- -re ".*#\[0-9\]+${ws}$hex in foo \\(i=20\\) at .*${srcfile}:30\r\n#\[0-9\]+${ws}$hex in main \\((void|)\\) at .*${srcfile}:48\r\n$gdb_prompt $" {
+ -re ".*#\[0-9\]+${ws}$hex in __cxa_throw.*#\[0-9\]+${ws}$hex in foo \\(i=20\\) at .*${srcfile}:\[0-9\]+\r\n#\[0-9\]+${ws}$hex in main \\(.*\\) at .*${srcfile}:\[0-9\]+\r\n$gdb_prompt $" {
pass $name
}
}
@@ -150,8 +158,7 @@ gdb_test_multiple "continue" $name {
pass $name
}
-re "Continuing.${ws}Catchpoint \[0-9\]+ \\(exception caught\\)\r\n.*\r\n$gdb_prompt $" {
- # TODO: gdb HEAD 2004-01-08 does this. Is this okay?
- unresolved $name
+ pass $name
}
}

@@ -160,7 +167,7 @@ gdb_test_multiple "continue" $name {

set name "backtrace after first catch"
gdb_test_multiple "backtrace" $name {
- -re ".*#\[0-9\]+${ws}$hex in main \\((void|)\\) at .*$srcfile:50\r\n$gdb_prompt $" {
+ -re ".*#\[0-9\]+${ws}$hex in __cxa_begin_catch.*#\[0-9\]+${ws}$hex in main \\(.*\\) at .*$srcfile:\[0-9\]+\r\n$gdb_prompt $" {
pass $name
}
}
@@ -173,8 +180,7 @@ gdb_test_multiple "continue" $name {
pass $name
}
-re "Continuing.${ws}Got an except 13${ws}Catchpoint \[0-9\]+ \\(exception thrown\\)\r\n.*\r\n$gdb_prompt $" {
- # TODO: gdb HEAD 2004-01-08 does this. Is this okay?
- unresolved $name
+ pass $name
}
}

@@ -183,7 +189,7 @@ gdb_test_multiple "continue" $name {

set name "backtrace after second throw"
gdb_test_multiple "backtrace" $name {
- -re ".*#\[0-9\]+${ws}$hex in foo \\(i=20\\) at .*${srcfile}:30\r\n#\[0-9\]+${ws}$hex in main \\((void|)\\) at .*${srcfile}:56\r\n$gdb_prompt $" {
+ -re ".*#\[0-9\]+${ws}$hex in __cxa_throw.*#\[0-9\]+${ws}$hex in foo \\(i=20\\) at .*${srcfile}:\[0-9\]+\r\n#\[0-9\]+${ws}$hex in main \\(.*\\) at .*${srcfile}:\[0-9\]+\r\n$gdb_prompt $" {
pass $name
}
}
@@ -196,8 +202,7 @@ gdb_test_multiple "continue" $name {
pass $name
}
-re "Continuing.${ws}Catchpoint \[0-9\]+ \\(exception caught\\)\r\n.*\r\n$gdb_prompt $" {
- # TODO: gdb HEAD 2004-01-08 does this. Is this okay?
- unresolved $name
+ pass $name
}
}

@@ -206,7 +211,7 @@ gdb_test_multiple "continue" $name {

set name "backtrace after second catch"
gdb_test_multiple "backtrace" $name {
- -re ".*#\[0-9\]+${ws}$hex in main \\((void|)\\) at .*$srcfile:58\r\n$gdb_prompt $" {
+ -re ".*#\[0-9\]+${ws}$hex in __cxa_begin_catch.*#\[0-9\]+${ws}$hex in main \\(.*\\) at .*$srcfile:\[0-9\]+\r\n$gdb_prompt $" {
pass $name
}
}