#40621 [NEW]: Crash when constructor called inappropriately (statically)

[sean@php.net]

From: [email]sean@php.net[/email]
Operating system: Linux
PHP version: 5.2.1
PHP Bug Type: Reproducible crash
Bug description: Crash when constructor called inappropriately (statically)

Description:
------------
PHP 5.2.x (tried 5.2.1, 5.2.0) crashes if a constructor is called
statically from within the host class.

Code explains this better.

I realize I'm not SUPPOSED to do this, but I did it accidentally (I made a
mistake). I expect the error message. It shouldn't, however, crash.

Reproduce code:
---------------
php -r 'class Foo { private function __construct() { } function get() {
self::__construct(); } } Foo::get();'

Expected result:
----------------
E_FATAL
Here's 5.1.6:

Fatal error: Non-static method Foo::__construct() cannot be called
statically in Command line code on line 1

In 5.2.0, this was downgraded to E_STRICT, which I suspect is why it
crashes (E_FATAL would have bailed, E_STRICT tries to run this messed up
code).

Actual result:
--------------
here's the backtrace:

(gdb) run -r 'class Foo { private function __construct() { } function
get() { self::__construct(); } } Foo::get();'
Starting program: /usr/local/bin/php -r 'class Foo { private function
__construct() { } function get() { self::__construct(); } } Foo::get();'
[Thread debugging using libthread_db enabled]
[New Thread -1214503248 (LWP 28107)]

Strict Standards: Non-static method Foo::get() should not be called
statically in Command line code on line 1

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1214503248 (LWP 28107)]
0x083c425c in zend_get_class_entry (zobject=0x0)
at /home/sean/downloads/php-5.2.1/Zend/zend_API.c:248
248 if (Z_OBJ_HT_P(zobject)->get_class_entry) {
(gdb) bt
#0 0x083c425c in zend_get_class_entry (zobject=0x0)
at /home/sean/downloads/php-5.2.1/Zend/zend_API.c:248
#1 0x083ec877 in ZEND_INIT_STATIC_METHOD_CALL_SPEC_UNUSED_HANDLER (
execute_data=0xbfd5e800)
at /home/sean/downloads/php-5.2.1/Zend/zend_vm_execute.h:1222
#2 0x083e7fc3 in execute (op_array=0xb798f330)
at /home/sean/downloads/php-5.2.1/Zend/zend_vm_execute.h:92
#3 0x083e85ed in zend_do_fcall_common_helper_SPEC
(execute_data=0xbfd5e980)
at /home/sean/downloads/php-5.2.1/Zend/zend_vm_execute.h:234
#4 0x083e90c0 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbfd5e980)
at /home/sean/downloads/php-5.2.1/Zend/zend_vm_execute.h:322
#5 0x083e7fc3 in execute (op_array=0xb798d7fc)
at /home/sean/downloads/php-5.2.1/Zend/zend_vm_execute.h:92
#6 0x083b6e79 in zend_eval_string (
str=0xbfd5f911 "class Foo { private function __construct() { }
function get() { self::__construct(); } } Foo::get();", retval_ptr=0x0,
string_name=0x8522074 "Command line code")
at /home/sean/downloads/php-5.2.1/Zend/zend_execute_API.c:1151
#7 0x083b7012 in zend_eval_string_ex (
str=0xbfd5f911 "class Foo { private function __construct() { }
function get() { self::__construct(); } } Foo::get();", retval_ptr=0x0,
string_name=0x8522074 "Command line code", handle_exceptions=1)
at /home/sean/downloads/php-5.2.1/Zend/zend_execute_API.c:1185
#8 0x0843d555 in main (argc=3, argv=0xbfd5ed14)
at /home/sean/downloads/php-5.2.1/sapi/cli/php_cli.c:1153


--
Edit bug report at [url]http://bugs.php.net/?id=40621&edit=1[/url]
--
Try a CVS snapshot (PHP 4.4): [url]http://bugs.php.net/fix.php?id=40621&r=trysnapshot44[/url]
Try a CVS snapshot (PHP 5.2): [url]http://bugs.php.net/fix.php?id=40621&r=trysnapshot52[/url]
Try a CVS snapshot (PHP 6.0): [url]http://bugs.php.net/fix.php?id=40621&r=trysnapshot60[/url]
Fixed in CVS: [url]http://bugs.php.net/fix.php?id=40621&r=fixedcvs[/url]
Fixed in release: [url]http://bugs.php.net/fix.php?id=40621&r=alreadyfixed[/url]
Need backtrace: [url]http://bugs.php.net/fix.php?id=40621&r=needtrace[/url]
Need Reproduce Script: [url]http://bugs.php.net/fix.php?id=40621&r=needscript[/url]
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Not developer issue: [url]http://bugs.php.net/fix.php?id=40621&r=support[/url]
Expected behavior: [url]http://bugs.php.net/fix.php?id=40621&r=notwrong[/url]
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Submitted twice: [url]http://bugs.php.net/fix.php?id=40621&r=submittedtwice[/url]
register_globals: [url]http://bugs.php.net/fix.php?id=40621&r=globals[/url]
PHP 3 support discontinued: [url]http://bugs.php.net/fix.php?id=40621&r=php3[/url]
Daylight Savings: [url]http://bugs.php.net/fix.php?id=40621&r=dst[/url]
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Install GNU Sed: [url]http://bugs.php.net/fix.php?id=40621&r=gnused[/url]
Floating point limitations: [url]http://bugs.php.net/fix.php?id=40621&r=float[/url]
No Zend Extensions: [url]http://bugs.php.net/fix.php?id=40621&r=nozend[/url]
MySQL Configuration Error: [url]http://bugs.php.net/fix.php?id=40621&r=mysqlcfg[/url]

[tony2001@php.net]

ID: 40621
Updated by: [email]tony2001@php.net[/email]
Reported By: [email]sean@php.net[/email]
-Status: Open
+Status: Closed
Bug Type: Reproducible crash
Operating System: Linux
PHP Version: 5.2.1
New Comment:

This bug has been fixed in CVS.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
[url]http://snaps.php.net/[/url].

Thank you for the report, and for helping us make PHP better.




Previous Comments:
------------------------------------------------------------------------

[2007-02-24 20:57:29] [email]sean@php.net[/email]

Description:
------------
PHP 5.2.x (tried 5.2.1, 5.2.0) crashes if a constructor is called
statically from within the host class.

Code explains this better.

I realize I'm not SUPPOSED to do this, but I did it accidentally (I
made a mistake). I expect the error message. It shouldn't, however,
crash.

Reproduce code:
---------------
php -r 'class Foo { private function __construct() { } function get() {
self::__construct(); } } Foo::get();'

Expected result:
----------------
E_FATAL
Here's 5.1.6:

Fatal error: Non-static method Foo::__construct() cannot be called
statically in Command line code on line 1

In 5.2.0, this was downgraded to E_STRICT, which I suspect is why it
crashes (E_FATAL would have bailed, E_STRICT tries to run this messed
up code).

Actual result:
--------------
here's the backtrace:

(gdb) run -r 'class Foo { private function __construct() { } function
get() { self::__construct(); } } Foo::get();'
Starting program: /usr/local/bin/php -r 'class Foo { private function
__construct() { } function get() { self::__construct(); } }
Foo::get();'
[Thread debugging using libthread_db enabled]
[New Thread -1214503248 (LWP 28107)]

Strict Standards: Non-static method Foo::get() should not be called
statically in Command line code on line 1

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1214503248 (LWP 28107)]
0x083c425c in zend_get_class_entry (zobject=0x0)
at /home/sean/downloads/php-5.2.1/Zend/zend_API.c:248
248 if (Z_OBJ_HT_P(zobject)->get_class_entry) {
(gdb) bt
#0 0x083c425c in zend_get_class_entry (zobject=0x0)
at /home/sean/downloads/php-5.2.1/Zend/zend_API.c:248
#1 0x083ec877 in ZEND_INIT_STATIC_METHOD_CALL_SPEC_UNUSED_HANDLER (
execute_data=0xbfd5e800)
at /home/sean/downloads/php-5.2.1/Zend/zend_vm_execute.h:1222
#2 0x083e7fc3 in execute (op_array=0xb798f330)
at /home/sean/downloads/php-5.2.1/Zend/zend_vm_execute.h:92
#3 0x083e85ed in zend_do_fcall_common_helper_SPEC
(execute_data=0xbfd5e980)
at /home/sean/downloads/php-5.2.1/Zend/zend_vm_execute.h:234
#4 0x083e90c0 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbfd5e980)
at /home/sean/downloads/php-5.2.1/Zend/zend_vm_execute.h:322
#5 0x083e7fc3 in execute (op_array=0xb798d7fc)
at /home/sean/downloads/php-5.2.1/Zend/zend_vm_execute.h:92
#6 0x083b6e79 in zend_eval_string (
str=0xbfd5f911 "class Foo { private function __construct() { }
function get() { self::__construct(); } } Foo::get();",
retval_ptr=0x0,
string_name=0x8522074 "Command line code")
at /home/sean/downloads/php-5.2.1/Zend/zend_execute_API.c:1151
#7 0x083b7012 in zend_eval_string_ex (
str=0xbfd5f911 "class Foo { private function __construct() { }
function get() { self::__construct(); } } Foo::get();",
retval_ptr=0x0,
string_name=0x8522074 "Command line code", handle_exceptions=1)
at /home/sean/downloads/php-5.2.1/Zend/zend_execute_API.c:1185
#8 0x0843d555 in main (argc=3, argv=0xbfd5ed14)
at /home/sean/downloads/php-5.2.1/sapi/cli/php_cli.c:1153



------------------------------------------------------------------------


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Edit this bug report at [url]http://bugs.php.net/?id=40621&edit=1[/url]