4BSD/usr/man/cat5/core.5

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CORE(5)             UNIX Programmer's Manual              CORE(5)



NAME
     core - format of memory image file

DESCRIPTION
     UNIX writes out a memory image of a terminated process when
     any of various errors occur.  See _s_i_g_n_a_l(2) for the list of
     reasons; the most common are memory violations, illegal
     instructions, bus errors, and user-generated quit signals.
     The memory image is called `core' and is written in the
     process's working directory (provided it can be; normal
     access controls apply).

     The maximum size of a _c_o_r_e file is limited by _v_l_i_m_i_t(2).
     Files which would be larger than the limit are not created.

     The core file consists of the _u. area, which currently con-
     sists of 6 pages, beginning with a _u_s_e_r structure as given
     in /usr/include/sys/user.h.  The kernel stack grows from the
     end of this 6 page region.  The remainder of the core file
     consists first of the data pages and then the stack pages of
     the process image.

     In general the debugger _a_d_b(1) is sufficient to deal with
     core images.

SEE ALSO
     adb(1), signal(2), vlimit(2)




























Printed 11/10/80                                                1