crosstool-ng: patches/gcc/3.4.6/180-pr15068-fix.patch@3a7b2eee9dcd

scripts: add option to start an interactive debug shell

Add an option that, when a command fails:
- starts an interactive shell with the failed command's environment
- attempts re-execution of the failed command, continues, or aborts
at user's whim.

Before starting the debug-shell, the backtrace is printed.
When exiting for an abort, the standard error message is printed.

Based on an idea and a patch from: Johannes Stezenbach <js@sig21.net>
http://sourceware.org/ml/crossgcc/2012-09/msg00144.html

Signed-off-by: Johannes Stezenbach <js@sig21.net>
[yann.morin.1998@free.fr: integrate in the fault handler]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Acked-by: Johannes Stezenbach <js@sig21.net>
Patchwork-Id: 191571
Patchwork-Id: 191668

     1 diff -durN gcc-3.4.6.orig/gcc/flow.c gcc-3.4.6/gcc/flow.c

     2 --- gcc-3.4.6.orig/gcc/flow.c	2005-09-01 22:51:09.000000000 +0200

     3 +++ gcc-3.4.6/gcc/flow.c	2007-08-15 23:00:30.000000000 +0200

     4 @@ -1884,6 +1884,7 @@

     5  	  rtx set_src = SET_SRC (pc_set (BB_END (bb)));

     6  	  rtx cond_true = XEXP (set_src, 0);

     7  	  rtx reg = XEXP (cond_true, 0);

     8 + 	  enum rtx_code inv_cond;

    10  	  if (GET_CODE (reg) == SUBREG)

    11  	    reg = SUBREG_REG (reg);

    12 @@ -1892,11 +1893,13 @@

    13  	     in the form of a comparison of a register against zero.

    14  	     If the condition is more complex than that, then it is safe

    15  	     not to record any information.  */

    16 -	  if (GET_CODE (reg) == REG

    17 + 	  inv_cond = reversed_comparison_code (cond_true, BB_END (bb));

    18 + 	  if (inv_cond != UNKNOWN

    19 +	      && GET_CODE (reg) == REG

    20  	      && XEXP (cond_true, 1) == const0_rtx)

    21  	    {

    22  	      rtx cond_false

    23 -		= gen_rtx_fmt_ee (reverse_condition (GET_CODE (cond_true)),

    24 +		= gen_rtx_fmt_ee (inv_cond,

    25  				  GET_MODE (cond_true), XEXP (cond_true, 0),

    26  				  XEXP (cond_true, 1));

    27  	      if (GET_CODE (XEXP (set_src, 1)) == PC)

author	"Yann E. MORIN" <yann.morin.1998@free.fr>
	Sat Oct 06 23:48:07 2012 +0200 (2012-10-06)
changeset 3083	3a7b2eee9dcd
parent 339	bd5e0a849352
permissions	-rw-r--r--