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#! perl
# Copyright (C) 2001-2008, Parrot Foundation.
use strict;
use warnings;
use lib qw( . lib ../lib ../../lib );
use Test::More;
use Parrot::Test tests => 32,
qw[run_command slurp_file];
use Parrot::Test::Util 'create_tempfile';
=head1 NAME
t/op/exceptions.t - Exception Handling
=head1 SYNOPSIS
% prove t/op/exceptions.t
=head1 DESCRIPTION
Tests C<Exception> and C<ExceptionHandler> PMCs.
=cut
pasm_output_is( <<'CODE', <<'OUTPUT', "push_eh label - pop_eh" );
.pcc_sub :main main:
push_eh _handler
print "ok 1\n"
pop_eh
print "ok 2\n"
end
_handler:
end
CODE
ok 1
ok 2
OUTPUT
pasm_output_is( <<'CODE', <<'OUTPUT', "push_eh eh - pop_eh" );
.pcc_sub :main main:
new P29, 'ExceptionHandler'
push_eh P29
print "ok 1\n"
pop_eh
print "ok 2\n"
end
CODE
ok 1
ok 2
OUTPUT
pasm_output_is( <<'CODE', <<'OUTPUT', "push_eh - throw" );
.pcc_sub :main main:
print "main\n"
push_eh _handler
new P30, 'Exception'
throw P30
print "not reached\n"
end
_handler:
print "caught it\n"
end
CODE
main
caught it
OUTPUT
pasm_output_is( <<'CODE', <<'OUTPUT', "push_eh eh - throw" );
.pcc_sub :main main:
print "main\n"
new P29, 'ExceptionHandler'
set_label P29, _handler
push_eh P29
new P30, 'Exception'
throw P30
print "not reached\n"
end
_handler:
print "caught it\n"
end
CODE
main
caught it
OUTPUT
pasm_output_is( <<'CODE', <<'OUTPUT', "get_results" );
.pcc_sub :main main:
print "main\n"
push_eh handler
new P1, 'Exception'
set P1, "just pining"
throw P1
print "not reached\n"
end
handler:
get_results "0", P0
set S0, P0
print "caught it\n"
typeof S1, P0
print S1
print "\n"
print S0
print "\n"
null P5
end
CODE
main
caught it
Exception
just pining
OUTPUT
pasm_output_is( <<'CODE', <<'OUTPUT', "get_results - be sure registers are ok" );
.pcc_sub :main main:
# see also #38459
print "main\n"
new P0, 'Integer'
push_eh handler
new P1, 'Exception'
set P1, "just pining"
throw P1
print "not reached\n"
end
handler:
get_results "0", P1
inc P0
print "ok\n"
end
CODE
main
ok
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', ".get_results() - PIR" );
.sub main :main
print "main\n"
push_eh _handler
new $P1, 'Exception'
set $P1, "just pining"
throw $P1
print "not reached\n"
end
_handler:
.local pmc e
.local string s
.get_results (e)
s = e
print "caught it\n"
typeof $S1, e
print $S1
print "\n"
print s
print "\n"
null $P5
.end
CODE
main
caught it
Exception
just pining
OUTPUT
pasm_output_is( <<'CODE', <<'OUTPUT', "push_eh - throw - message" );
.pcc_sub :main main:
print "main\n"
push_eh _handler
new P30, 'Exception'
set P30, "something happened"
throw P30
print "not reached\n"
end
_handler:
get_results "0", P5
set S0, P5
print "caught it\n"
print S0
print "\n"
end
CODE
main
caught it
something happened
OUTPUT
pasm_error_output_like( <<'CODE', <<'OUTPUT', "throw - no handler" );
.pcc_sub :main main:
new P0, 'Exception'
set P0, "something happened"
throw P0
print "not reached\n"
end
CODE
/something happened/
OUTPUT
pasm_error_output_like( <<'CODE', <<'OUTPUT', "throw - no handler, no message" );
.pcc_sub :main main:
push_eh _handler
new P0, 'Exception'
pop_eh
throw P0
print "not reached\n"
end
_handler:
end
CODE
/No exception handler and no message/
OUTPUT
pasm_error_output_like( <<'CODE', <<'OUTPUT', "throw - no handler, no message" );
.pcc_sub :main main:
new P0, 'Exception'
throw P0
print "not reached\n"
end
CODE
/No exception handler and no message/
OUTPUT
pasm_output_is( <<'CODE', <<'OUTPUT', "2 exception handlers" );
.pcc_sub :main main:
print "main\n"
push_eh _handler1
push_eh _handler2
new P30, 'Exception'
set P30, "something happened"
throw P30
print "not reached\n"
end
_handler1:
get_results "0", P5
set S0, P5
print "caught it in 1\n"
print S0
print "\n"
end
_handler2:
get_results "0", P0
set S0, P0
print "caught it in 2\n"
print S0
print "\n"
end
CODE
main
caught it in 2
something happened
OUTPUT
pasm_output_is( <<'CODE', <<'OUTPUT', "2 exception handlers, throw next" );
.pcc_sub :main main:
print "main\n"
push_eh _handler1
push_eh _handler2
new P30, 'Exception'
set P30, "something happened"
throw P30
print "not reached\n"
end
_handler1:
get_results "0", P5
set S0, P5
print "caught it in 1\n"
print S0
print "\n"
end
_handler2:
get_results "0", P5
set S0, P5
print "caught it in 2\n"
print S0
print "\n"
rethrow P5
end
CODE
main
caught it in 2
something happened
caught it in 1
something happened
OUTPUT
pasm_output_is( <<'CODE', <<OUT, "die" );
.pcc_sub :main main:
push_eh _handler
die 3, 100
print "not reached\n"
end
_handler:
print "caught it\n"
end
CODE
caught it
OUT
pasm_output_is( <<'CODE', <<OUT, "die, error, severity" );
.pcc_sub :main main:
push_eh _handler
die 3, 100
print "not reached\n"
end
_handler:
get_results "0", P5
print "caught it\n"
set I0, P5['severity']
print "severity "
print I0
print "\n"
end
CODE
caught it
severity 3
OUT
pasm_error_output_like( <<'CODE', <<OUT, "die - no handler" );
.pcc_sub :main main:
die 3, 100
print "not reached\n"
end
_handler:
print "caught it\n"
end
CODE
/No exception handler and no message/
OUT
pasm_output_is( <<'CODE', '', "exit exception" );
.pcc_sub :main main:
noop
exit 0
print "not reached\n"
end
CODE
pasm_output_is( <<'CODE', <<'OUTPUT', "push_eh - throw" );
.pcc_sub :main main:
print "main\n"
push_eh handler
print "ok\n"
new P30, 'Exception'
throw P30
print "not reached\n"
end
handler:
print "caught it\n"
end
CODE
main
ok
caught it
OUTPUT
1;
pir_error_output_like( <<'CODE', <<'OUTPUT', 'pop_eh with no handler' );
.sub main :main
pop_eh
print "no exceptions.\n"
.end
CODE
/No handler to delete./
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'pop_eh out of context (2)');
.sub main :main
.local pmc outer, cont
push_eh handler
test1()
print "skipped.\n"
goto done
handler:
.local pmc exception
.get_results (exception)
$S0 = exception
print "Error: "
print $S0
print "\n"
done:
print "done.\n"
.end
.sub test1
.local pmc exit
print "[in test1]\n"
## pop_eh is illegal here, and signals an exception.
pop_eh
print "[cleared]\n"
.end
CODE
[in test1]
Error: No handler to delete.
done.
OUTPUT
# stringification is handled by a vtable, which runs in a second
# runloop. when an error in the method tries to go to a Error_Handler defined
# outside it, it winds up going to the inner runloop, giving strange results.
pir_output_is( <<'CODE', <<'OUTPUT', 'pop_eh out of context (2)' );
.sub main :main
$P0 = get_hll_global ['Foo'], 'load'
$P0()
$P0 = new 'Foo'
push_eh catch
$S0 = $P0
pop_eh
say "huh?"
.return()
catch:
.get_results ($P1)
finalize $P1
say "caught"
.return()
.end
.namespace ['Foo']
.sub load
$P0 = newclass 'Foo'
.end
.sub get_string :vtable :method
$P0 = new 'Exception'
throw $P0
.end
CODE
caught
OUTPUT
pir_error_output_like( <<'CODE', <<'OUTPUT', "throw in main, no handler" );
.sub main :main
print "main\n"
$P0 = new 'Exception'
throw $P0
.return()
.end
CODE
/^main
No exception handler/
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', "exit_handler via exit exception" );
.sub main :main
.local pmc a
.lex 'a', a
a = new 'Integer'
a = 42
push_eh handler
exit 0
handler:
.const 'Sub' $P0 = 'exit_handler'
capture_lex $P0
.tailcall $P0()
.end
.sub exit_handler :outer(main)
say "at_exit"
.local pmc a
a = find_lex 'a'
print 'a = '
say a
.end
CODE
at_exit
a = 42
OUTPUT
## Regression test for r14697. This probably won't be needed when PDD23 is
## fully implemented.
pir_error_output_like( <<'CODE', <<'OUTPUT', "invoke handler in calling sub" );
## This tests that error handlers are out of scope when invoked (necessary for
## rethrow) when the error is signalled in another sub.
.sub main :main
push_eh handler
broken()
print "not reached.\n"
handler:
.local pmc exception
.get_results (exception)
$S0 = exception
print "in handler.\n"
print $S0
print "\n"
rethrow exception
.end
.sub broken
$P0 = new 'Exception'
$P0 = "something broke"
throw $P0
.end
CODE
/\Ain handler.
something broke
something broke
current inst/
OUTPUT
pir_error_output_like( <<'CODE', <<'OUTPUT', 'die_s' );
.sub main :main
die 'We are dying str!'
.end
CODE
/We are dying str!/
OUTPUT
pir_error_output_like( <<'CODE', <<'OUTPUT', 'die_p' );
.sub main :main
.local pmc msg
msg = new 'String'
msg = 'We are dying pmc!'
die msg
.end
CODE
/We are dying pmc!/
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', "resuming after exception handled - goto label" );
.sub main :main
print "before calling setup_foo\n"
setup_foo()
print "after calling setup_foo\n"
end
.end
.sub setup_foo
print "in setup_foo\n"
newclass $P0, "Foo"
push_eh handler
newclass $P0, "Foo"
pop_eh
resume:
print "running more code\n"
.return()
handler:
print "in handler\n"
goto resume
.end
CODE
before calling setup_foo
in setup_foo
in handler
running more code
after calling setup_foo
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', "resuming after exception handled - return from cont" );
.sub main :main
print "before calling setup_foo\n"
setup_foo()
print "after calling setup_foo\n"
end
.end
.sub setup_foo
print "in setup_foo\n"
newclass $P0, "Foo"
push_eh handler
newclass $P0, "Foo"
pop_eh
resume:
print "never reached\n"
handler:
print "in handler\n"
.return()
.end
CODE
before calling setup_foo
in setup_foo
in handler
after calling setup_foo
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', "resuming after exception handled - return from cont" );
# This test is a simplified version of PGE's grammar creation code.
.sub main :main
$P1 = newclass 'FirstClass'
$P1 = newclass 'MakerClass'
$P0 = new 'String'
$P0 = 'Foo'
$P1 = newclass $P0
print "before compile\n"
compile($P0)
print "after compile\n"
end
.end
.sub compile
.param string classname
print "in compile subroutine\n"
$P0 = new 'FirstClass'
$P1 = $P0.'compile'(classname)
print "returned from handler\nException message: "
print $P1
.end
.namespace [ "FirstClass" ]
.sub 'compile' :method
.param pmc name
print "in compile method\n"
$P1 = new 'String'
$P1 = "no exception\n"
make_grammar:
push_eh handler
$P0 = new 'MakerClass'
$P0.'make'(name)
pop_eh
.return($P1)
handler:
get_results "0", $P2
print "in handler\n"
.return ($P2)
.end
.namespace [ "MakerClass" ]
.sub 'make' :method
.param pmc name
print "in make method\n"
$P0 = newclass name
print "after newclass, never reached\n"
.end
CODE
before compile
in compile subroutine
in compile method
in make method
in handler
returned from handler
Exception message: Class Foo already registered!
after compile
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', "Resumable exceptions" );
.sub main :main
push_eh _handler
new $P1, 'Exception'
say 'Before throwing'
throw $P1
say 'After throwing'
end
_handler:
.local pmc e
.local string s
.local pmc c
.get_results (e)
s = e
say 'In the exception handler'
c = e['resume']
c()
.end
CODE
Before throwing
In the exception handler
After throwing
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', "Resumable exceptions from a different context");
.sub main :main
push_eh catcher
'foo'()
pop_eh
say 'ok 4'
.return ()
catcher:
.get_results ($P0)
$P1 = $P0['resume']
say 'in the handler'
$P1()
.end
.sub 'foo'
say 'ok 1'
$P0 = new 'Exception'
throw $P0
say 'ok 2'
$P0 = new 'Exception'
throw $P0
say 'ok 3'
.end
CODE
ok 1
in the handler
ok 2
in the handler
ok 3
ok 4
OUTPUT
# Test massaged from TT #2188
{
sub compile_wx {
my $code = shift;
my ($fh, $wx_filename) = create_tempfile( SUFFIX => '.winxed', UNLINK => 1 );
(undef, my $pir_filename) = create_tempfile( SUFFIX => '.pir', UNLINK => 1 );
(undef, my $pbc_filename) = create_tempfile( SUFFIX => '.pbc', UNLINK => 1 );
print $fh $code;
if (system(qw[./winxed --target=pir -o], $pir_filename, $wx_filename)
|| system(qw[./parrot -o], $pbc_filename, $pir_filename)) {
die "couldn't compile winxed";
}
close $fh;
return $pbc_filename;
}
my $friend = compile_wx(<<'WX1'); my $exptest = compile_wx(sprintf(<<'WX2', $friend));
namespace em {
class Friend {
function Friend() {}
function call() {
throw new 'Exception'({
"message" : "Damned ! an exception !",
"severity" : 100});
}
}
}
WX1
$load '%s';
namespace em {
class Friend;
class User {
function User() {}
function call0() {
try {
self.call1();
} catch(ex) {
say(ex['message']);
for (string exstr in ex.backtrace_strings()) {
for (string str in split("\n",exstr)) {
say(str);
}
}
}
self.call1();
}
function call1() {
var friend = new em.Friend();
friend.call();
}
}
}
function main[main](var argv) {
var user = new em.User();
user.call0();
}
WX2
(undef, my $user_bt_file) = create_tempfile( UNLINK => 1 );
(undef, my $auto_bt_file) = create_tempfile( UNLINK => 1 );
run_command("./parrot $exptest",
STDOUT => $user_bt_file,
STDERR => $auto_bt_file);
my @user_bt = split /\n/, slurp_file($user_bt_file);
my @auto_bt = split /\n/, slurp_file($auto_bt_file);
# 3rd backtrace frame differs intentionally
delete $user_bt[3]; delete $auto_bt[3];
is_deeply([@user_bt], [@auto_bt],
"user-level backtraces the same as automatically generated backtraces");
}
# Local Variables:
# mode: cperl
# cperl-indent-level: 4
# fill-column: 100
# End:
# vim: expandtab shiftwidth=4:
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