william xiao wrote:
> I' m trying to make some changes to GCC4.2. I want to obtain some
> information about callee so i add one statment to function: rtx
> expand_call (tree exp, rtx target, int ignore) as follows:
>
> 2702 /* Generate the actual call instruction. */
> 2703 emit_call_1 (funexp, exp, fndecl, funtype, unadjusted_args_size,
> 2704 adjusted_args_size.constant, struct_value_size,
> 2705 next_arg_reg, valreg, old_inhibit_defer_pop, call_fusage,
> 2706 flags, & args_so_far);
> 2707 tree callee = DECL_SAVED_TREE(fndecl); /* added stamtment by myself
> */
>
> Then, i get following strange make error message:
>
>
> make[2]: *** [crtend.o] Error 1
> ../.././gcc/crtstuff.c: In function ‘__do_global_ctors_aux’:
> ../.././gcc/crtstuff.c:521: internal compiler error: Segmentation
> ../.././gcc/crtstuff.c: In function ‘__do_global_dtors_aux’:
> ../.././gcc/crtstuff.c:287: internal compiler error: Segmentation fault
> make[2]: *** [crtbegin.o] Error 1
> make[2]: Leaving directory `/wxiao3/src/gcc-4.2.0/host-i686-pc-linux-gnu/gcc'
> make[1]: *** [install-gcc] Error 2
> make[1]: Leaving directory `/wxiao3/src/gcc-4.2.0'
> make: *** [install] Error 2
>
> What's the cause of these errors? I have never touch the files such
> as crtend.c and crtstuff.c. I only add one statement to calls.c.
The files crtend.c and crtstuff.c are being compiled by the newly-built
compiler, as the form part of the libgcc for the target, and it is your
newly-built compiler that is crashing, owing to a bug in the change you made
to calls.c.
It's really hard to see what could be wrong with adding a call to
DECL_SAVED_TREE if fndecl isn't NULL, but from the look of some of the code
just a few lines earlier in the function:
/* If register arguments require space on the stack and stack space
was not preallocated, allocate stack space here for arguments
passed in registers. */
if (OUTGOING_REG_PARM_STACK_SPACE ((!fndecl ? fntype : TREE_TYPE
(fndecl)))
... it seems to me that that is at least a possibility that you have to deal
with.
cheers,
DaveK
