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exception-old.t
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exception-old.t
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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 => 22;
=head1 NAME
t/pmc/exception.t - Exception Handling
=head1 SYNOPSIS
% prove t/pmc/exception-old.t
=head1 DESCRIPTION
Tests C<Exception> and C<ExceptionHandler> PMCs.
=cut
pasm_output_is( <<'CODE', <<'OUTPUT', "get_results" );
.pcc_sub :main main:
print "main\n"
push_eh handler
new P1, ['Exception']
new P2, ['String']
set P2, "just pining"
setattribute P1, 'message', P2
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
pir_output_is( <<'CODE', <<'OUTPUT', 'Exception initialized with String' );
.sub main :main
.local pmc ex, exr
.local pmc msg, msgr
msg = new ['String']
msg = 'Message'
ex = new ['Exception'], msg
push_eh handler
throw ex
say 'Never here'
handler:
.get_results(exr)
msgr = exr['message']
say msgr
.end
CODE
Message
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', 'Exception initialized with Hash' );
.sub main :main
.local pmc ex, exr
.local pmc h, msgr
h = new ['Hash']
h['message'] = 'Message'
ex = new ['Exception'], h
push_eh handler
throw ex
say 'Never here'
handler:
.get_results(exr)
msgr = exr['message']
say msgr
.end
CODE
Message
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']
new P2, ['String']
set P2, "just pining"
setattribute P1, 'message', P2
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
$P1 = new ['Exception']
$P2 = new ['String']
set $P2, "just pining"
setattribute $P1, 'message', $P2
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']
new P20, ['String']
set P20, "something happened"
setattribute P30, "message", P20
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']
new P20, ['String']
set P20, "something happened"
setattribute P0, "message", P20
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']
new P20, ['String']
set P20, "something happened"
setattribute P30, "message", P20
throw P30
print "not reached\n"
end
_handler1:
get_results "0", P5
getattribute P2, P5, "message"
print "caught it in 1\n"
print P2
print "\n"
end
_handler2:
get_results "0", P0
getattribute P2, P0, "message"
print "caught it in 2\n"
print P2
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']
new P20, ['String']
set P20, "something happened"
setattribute P30, "message", P20
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, error, severity" );
.pcc_sub :main main:
push_eh _handler
die 3, 100
print "not reached\n"
end
_handler:
get_results "0", P5
set S0, 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;
# 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)
say "caught"
finalize $P1
.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_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", todo => "deprecate rethrow" );
## 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']
new $P2, ['String']
set $P2, "something broke"
setattribute $P0, "message", $P2
throw $P0
.end
CODE
/\Ain handler.
something broke
something broke
current inst/
OUTPUT
pir_output_is(<<'CODE', <<'OUTPUT', "taking a continuation promotes RetCs");
## This test creates a continuation in a inner sub and re-invokes it later. The
## re-invocation signals an error, which is caught by an intermediate sub.
## Returning from the "test" sub the second time failed in r28794; invoking
## parrot with "-D80" shows clearly that the "test" context was being recycled
## prematurely. For some reason, it is necessary to signal the error in order
## to expose the bug.
.sub main :main
.local int redux
.local pmc cont
## debug 0x80
redux = 0
print "calling test\n"
cont = test()
print "back from test\n"
if redux goto done
redux = 1
print "calling cont\n"
cont()
print "never.\n"
done:
print "done.\n"
.end
.sub test
## Push a handler around the foo() call.
push_eh handle_errs
print " calling foo\n"
.local pmc cont
cont = foo()
print " returning from test.\n"
.return (cont)
handle_errs:
pop_eh
print " test: caught error\n"
.return (cont)
.end
.sub foo
## Take a continuation.
.local pmc cont
cont = new ['Continuation']
set_label cont, over_there
print " returning from foo\n"
.return (cont)
over_there:
print " got over there.\n"
.local pmc ex
ex = new ['Exception']
throw ex
.end
CODE
calling test
calling foo
returning from foo
returning from test.
back from test
calling cont
got over there.
test: caught error
back from test
done.
OUTPUT
pir_error_output_like( <<'CODE', <<'OUTPUT', "throw - no handler" );
.sub main :main
push_eh try
failure()
pop_eh
exit 0
try:
.get_results($P0)
pop_eh
$S1 = $P0['backtrace']
$S1 .= "\n"
say $S1
.end
.sub failure
die 'what'
.end
CODE
/No such string attribute/
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', "catch ex from C-level MULTI function" );
.sub main :main
.local pmc p, q
p = new ['Integer']
set p, "0"
push_eh handler
#throw an exception from a C-level MULTI function
q = p / p
goto end
pop_eh
goto end
handler:
.local pmc exception
.local string message
.get_results (exception)
message = exception['message']
say_something(message)
end:
.end
.sub say_something
.param string message
#Calling this sub is enough to trigger the bug. If execution reached this
#point, the bug is fixed.
say "no segfault"
end:
.end
CODE
no segfault
OUTPUT
pir_output_is( <<'CODE', <<'OUTPUT', "count_eh" );
.sub main :main
$I0 = count_eh
if $I0 == 0 goto right_number1
print "not "
right_number1:
print "ok 1\n"
push_eh _handler1
push_eh _handler2
print "ok 2\n"
$I1 = count_eh
if $I1 == 2 goto right_number2
print "not "
right_number2:
print "ok 3\n"
pop_eh
pop_eh
print "ok 4\n"
$I2 = count_eh
if $I2 == 0 goto right_number3
print "not "
right_number3:
print "ok 5\n"
end
_handler1:
print "first handler\n"
end
_handler2:
print "second handler\n"
end
.end
CODE
ok 1
ok 2
ok 3
ok 4
ok 5
OUTPUT
# Local Variables:
# mode: cperl
# cperl-indent-level: 4
# fill-column: 100
# End:
# vim: expandtab shiftwidth=4: