[Numpy-discussion] numpy segv on OpenBSD (original) (raw)

Damien Miller djm at mindrot.org
Thu Jun 15 01:22:57 EDT 2006

Hi,

I'm trying to make an OpenBSD package on numpy-0.9.5, but it receives a malloc fault in the check_types() self-test as it tries to free() a junk pointer. In case you are not aware, OpenBSD's malloc() implementation does a fair bit of randomisation that makes it (deliberately) sensitive to memory management errors.

Instumenting the check_types test and scalartypes.inc.src's gen_dealloc() and gen_alloc() functions I noticed that the error occurs up after calling gen_dealloc() on a complex128scalar that was created as check_types's "valb" variable as it is GC'd.

The check_types tests work fine on the complex64scalar type and all the other preceeding types. I'm not familiar with the guts of numpy at all (and I can't even find the declaration of the complex128scalar type in the source). What difference between complex64scalar and complex128scalar should I look for to debug this further?

A backtrace is below for the curious.

-d

(gdb) bt #0 0x0ff49975 in kill () from /usr/lib/libc.so.39.1 #1 0x0ff822c3 in abort () at /usr/src/lib/libc/stdlib/abort.c:65 #2 0x0ff69649 in wrterror (p=0x2ff18460 "free_pages: pointer to wrong page") at /usr/src/lib/libc/stdlib/malloc.c:434 #3 0x0ff6970b in wrtwarning (p=0x2ff18460 "free_pages: pointer to wrong page") at /usr/src/lib/libc/stdlib/malloc.c:444 #4 0x0ff6ac53 in free_pages (ptr=0x7e0033b0, index=516111, info=0x0) at /usr/src/lib/libc/stdlib/malloc.c:1343 #5 0x0ff6a6f4 in ifree (ptr=0x7e0033b0) at /usr/src/lib/libc/stdlib/malloc.c:1770 #6 0x0ff6a8d1 in free (ptr=0x7e0033b0) at /usr/src/lib/libc/stdlib/malloc.c:1838 #7 0x0d259117 in gentype_dealloc (v=0x7e0033b0) at scalartypes.inc.src:283 #8 0x0c5fc778 in PyEval_EvalFrame () from /usr/local/lib/libpython2.4.so.0.0 #9 0x0c5feeb6 in PyEval_EvalCodeEx () from /usr/local/lib/libpython2.4.so.0.0 #10 0x0c60072f in fast_function () from /usr/local/lib/libpython2.4.so.0.0 #11 0x0c60036d in call_function () from /usr/local/lib/libpython2.4.so.0.0 #12 0x0c5fe42f in PyEval_EvalFrame () from /usr/local/lib/libpython2.4.so.0.0 #13 0x0c5feeb6 in PyEval_EvalCodeEx () from /usr/local/lib/libpython2.4.so.0.0 #14 0x0c5bf2f2 in function_call () from /usr/local/lib/libpython2.4.so.0.0 #15 0x0c5abe40 in PyObject_Call () from /usr/local/lib/libpython2.4.so.0.0 #16 0x0c600c6b in ext_do_call () from /usr/local/lib/libpython2.4.so.0.0 #17 0x0c5fe83c in PyEval_EvalFrame () from /usr/local/lib/libpython2.4.so.0.0 ---Type to continue, or q to quit--- #18 0x0c5feeb6 in PyEval_EvalCodeEx () from /usr/local/lib/libpython2.4.so.0.0 #19 0x0c5bf2f2 in function_call () from /usr/local/lib/libpython2.4.so.0.0 #20 0x0c5abe40 in PyObject_Call () from /usr/local/lib/libpython2.4.so.0.0 #21 0x0c5b2bd4 in instancemethod_call () from /usr/local/lib/libpython2.4.so.0.0 #22 0x0c5abe40 in PyObject_Call () from /usr/local/lib/libpython2.4.so.0.0 #23 0x0c600aa1 in do_call () from /usr/local/lib/libpython2.4.so.0.0 #24 0x0c6002fa in call_function () from /usr/local/lib/libpython2.4.so.0.0 #25 0x0c5fe42f in PyEval_EvalFrame () from /usr/local/lib/libpython2.4.so.0.0 #26 0x0c5feeb6 in PyEval_EvalCodeEx () from /usr/local/lib/libpython2.4.so.0.0 #27 0x0c5bf2f2 in function_call () from /usr/local/lib/libpython2.4.so.0.0 #28 0x0c5abe40 in PyObject_Call () from /usr/local/lib/libpython2.4.so.0.0 #29 0x0c5b2bd4 in instancemethod_call () from /usr/local/lib/libpython2.4.so.0.0 #30 0x0c5abe40 in PyObject_Call () from /usr/local/lib/libpython2.4.so.0.0 #31 0x0c5e5c9f in slot_tp_call () from /usr/local/lib/libpython2.4.so.0.0 #32 0x0c5abe40 in PyObject_Call () from /usr/local/lib/libpython2.4.so.0.0 #33 0x0c600aa1 in do_call () from /usr/local/lib/libpython2.4.so.0.0 #34 0x0c6002fa in call_function () from /usr/local/lib/libpython2.4.so.0.0 #35 0x0c5fe42f in PyEval_EvalFrame () from /usr/local/lib/libpython2.4.so.0.0 #36 0x0c5feeb6 in PyEval_EvalCodeEx () from /usr/local/lib/libpython2.4.so.0.0 #37 0x0c5bf2f2 in function_call () from /usr/local/lib/libpython2.4.so.0.0 #38 0x0c5abe40 in PyObject_Call () from /usr/local/lib/libpython2.4.so.0.0 ---Type to continue, or q to quit--- #39 0x0c600c6b in ext_do_call () from /usr/local/lib/libpython2.4.so.0.0 #40 0x0c5fe83c in PyEval_EvalFrame () from /usr/local/lib/libpython2.4.so.0.0 #41 0x0c5feeb6 in PyEval_EvalCodeEx () from /usr/local/lib/libpython2.4.so.0.0 #42 0x0c5bf2f2 in function_call () from /usr/local/lib/libpython2.4.so.0.0 #43 0x0c5abe40 in PyObject_Call () from /usr/local/lib/libpython2.4.so.0.0 #44 0x0c5b2bd4 in instancemethod_call () from /usr/local/lib/libpython2.4.so.0.0 #45 0x0c5abe40 in PyObject_Call () from /usr/local/lib/libpython2.4.so.0.0 #46 0x0c5e5c9f in slot_tp_call () from /usr/local/lib/libpython2.4.so.0.0 #47 0x0c5abe40 in PyObject_Call () from /usr/local/lib/libpython2.4.so.0.0 #48 0x0c600aa1 in do_call () from /usr/local/lib/libpython2.4.so.0.0 #49 0x0c6002fa in call_function () from /usr/local/lib/libpython2.4.so.0.0 #50 0x0c5fe42f in PyEval_EvalFrame () from /usr/local/lib/libpython2.4.so.0.0 #51 0x0c6007b0 in fast_function () from /usr/local/lib/libpython2.4.so.0.0 #52 0x0c60036d in call_function () from /usr/local/lib/libpython2.4.so.0.0 #53 0x0c5fe42f in PyEval_EvalFrame () from /usr/local/lib/libpython2.4.so.0.0 #54 0x0c5feeb6 in PyEval_EvalCodeEx () from /usr/local/lib/libpython2.4.so.0.0 #55 0x0c60072f in fast_function () from /usr/local/lib/libpython2.4.so.0.0 #56 0x0c60036d in call_function () from /usr/local/lib/libpython2.4.so.0.0 #57 0x0c5fe42f in PyEval_EvalFrame () from /usr/local/lib/libpython2.4.so.0.0 #58 0x0c5feeb6 in PyEval_EvalCodeEx () from /usr/local/lib/libpython2.4.so.0.0 #59 0x0c5fc1a7 in PyEval_EvalCode () from /usr/local/lib/libpython2.4.so.0.0 #60 0x0c61d060 in run_node () from /usr/local/lib/libpython2.4.so.0.0 ---Type to continue, or q to quit--- #61 0x0c61c0b1 in PyRun_SimpleFileExFlags () from /usr/local/lib/libpython2.4.so.0.0 #62 0x0c61ba49 in PyRun_AnyFileExFlags () from /usr/local/lib/libpython2.4.so.0.0 #63 0x0c622bab in Py_Main () from /usr/local/lib/libpython2.4.so.0.0 #64 0x1c000d60 in main ()

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