Re: PHP 4.0 Bug #5470: Segfault in add_assoc_long

Zeev Suraski wrote: > > This looks like a bogus trace - hash_environment() doesn't call > module_startup() at all. My guess is that you have a broken build... Hi, It's likely a corrupted stack. I also get wierd results when I try to insert a breakpoint at php_module_startup -- the break point works, but as soon as I "continue" there is a segfault with the following backtrace: Starting program: /usr/sbin/httpsd -X Cannot insert breakpoint 1: Temporarily disabling shared library breakpoints: 1 Breakpoint 1, php_module_startup (sf=0x8095d50) at main.c:757 757 { (gdb) c Continuing. Program received signal SIGSEGV, Segmentation fault. Cannot remove breakpoints because program is no longer writable. It might be running in another process. Further execution is probably impossible. 0x400a2b4e in __DTOR_END__ () (gdb) where #0 0x400a2b4e in __DTOR_END__ () #1 0x0 in ?? () So you are probably right that the build is broken. But, I got no compile errors, and the March 24 snapshot compiles w/out these problems. Any ideas? Ciao, Andreas > > Zeev > > On 8 Jul 2000 pour@mieterra.com wrote: > > > From: pour@mieterra.com > > Operating system: Linux > > PHP version: 4.0.1pl2 > > PHP Bug Type: Reproduceable crash > > Bug description: Segfault in add_assoc_long > > > > > > The crash occurs the second time I try to load a page after starting Apache 1.3.9 using > > the '-X' flag. I am willing to help debug this, but would like pointers to where to > > start, such as, where is the first place that some argument values look suspicious (the Zend code is > > too obfuscated with macros for me to make much sense of it w/out help). > > > > FWIW, the last version of PHP that works with the scripts is the March 24 snapshot. I had > > a whole different set of errors with the 4.0 release (having to do with the session stuff, which > > works fine now). > > > > The backtrace is: > > > > (gdb) where > > #0 0x820f2c4 in ?? () > > #1 0x4036758b in add_assoc_long (arg=0x84268b0, key=0x404f3318 "ìË\037", > > n=138567524) at zend_API.c:238 > > #2 0x4036c25e in object.8 () at zend_list.c:281 > > #3 0x403676c9 in add_assoc_bool (arg=0x8425f64, > > key=0x4049071c "zend_execute_API.c", b=272) at zend_API.c:258 > > #4 0x40360c96 in convert_scalar_to_array (op=0x40508cbc, type=1078526528) > > at zend_operators.c:424 > > #5 0x4034e81e in execute (op_array=0x838c264) at ./zend_execute.c:1197 > > #6 0x40356738 in execute (op_array=0x8424958) at ./zend_execute.c:169 > > #7 0x40356738 in execute (op_array=0x826b00c) at ./zend_execute.c:169 > > #8 0x4035cea7 in execute (op_array=0x834f438) at ./zend_execute.c:171 > > #9 0x40356738 in execute (op_array=0x83c8e08) at ./zend_execute.c:169 > > #10 0x40356738 in execute (op_array=0x826b1bc) at ./zend_execute.c:169 > > #11 0x4035cea7 in execute (op_array=0x826b374) at ./zend_execute.c:171 > > #12 0x40379ab2 in cfglex (cfglval=0xbffff908) at configuration-scanner.c:701 > > #13 0x403769d9 in php_error_cb (type=136671632, > > error_filename=0x13 <Address 0x13 out of bounds>, error_lineno=0, > > format=0x8257190 "ðR%\b¸\"%\bP]\t\b", orig_args=0x8257190) at > > main.c:338 > > #14 0x40377003 in php_module_startup (sf=0x8257190) at main.c:794 > > #15 0x4037734c in php_hash_environment () at main.c:957 > > #16 0x8053e3e in ap_invoke_handler () > > #17 0x8061ebb in ap_some_auth_required () > > #18 0x8062196 in ap_internal_redirect () > > #19 0x402bab65 in object.8 () > > #20 0x8053e3e in ap_invoke_handler () > > #21 0x8061ebb in ap_some_auth_required () > > #22 0x8061f18 in ap_process_request () > > #23 0x805bfe8 in ap_child_terminate () > > #24 0x805c147 in ap_child_terminate () > > #25 0x805c248 in ap_child_terminate () > > #26 0x805c6f8 in ap_child_terminate () > > #27 0x805ccfb in main () > > #28 0x400bbcb3 in __libc_start_main (main=0x805ca80 <main>, argc=2, > > argv=0xbffffb54, init=0x804f750 <_init>, fini=0x807cefc <_fini>, > > rtld_fini=0x4000a350 <_dl_fini>, stack_end=0xbffffb4c) > > at ../sysdeps/generic/libc-start.c:78 > > > > > > > > -- > Zeev Suraski <zeev@zend.com> > http://www.zend.com/