+
−/* Stack overflow handling.
+
−
+
−   Copyright (C) 2002, 2004, 2008, 2009, 2010 Free Software Foundation, Inc.
+
−
+
−   This program is free software: you can redistribute it and/or modify
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−   it under the terms of the GNU General Public License as published by
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−   the Free Software Foundation; either version 3 of the License, or
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−   (at your option) any later version.
+
−
+
−   This program is distributed in the hope that it will be useful,
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−   but WITHOUT ANY WARRANTY; without even the implied warranty of
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−   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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−   GNU General Public License for more details.
+
−
+
−   You should have received a copy of the GNU General Public License
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−   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
−
+
−
+
−/* Set up ACTION so that it is invoked on C stack overflow and on other,
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−   stack-unrelated, segmentation violation.
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−   Return -1 (setting errno) if this cannot be done.
+
−
+
−   When a stack overflow or segmentation violation occurs:
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−   1) ACTION is called.  It is passed an argument equal to
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−        - 0, for a stack overflow,
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−        - SIGSEGV, for a segmentation violation that does not appear related
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−          to stack overflow.
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−      On many platforms the two cases are hard to distinguish; when in doubt,
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−      zero is passed.
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−   2) If ACTION returns, a message is written to standard error, and the
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−      program is terminated: in the case of stack overflow, with exit code
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−      exit_failure (see "exitfail.h"), otherwise through a signal SIGSEGV.
+
−
+
−   A null ACTION acts like an action that does nothing.
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−
+
−   ACTION must be async-signal-safe.  ACTION together with its callees
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−   must not require more than SIGSTKSZ bytes of stack space.  Also,
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−   ACTION should not call longjmp, because this implementation does
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−   not guarantee that it is safe to return to the original stack.
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−
+
−   This function may install a handler for the SIGSEGV signal or for the SIGBUS
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−   signal or exercise other system dependent exception handling APIs.  */
+
−
+
−extern int c_stack_action (void (* /*action*/) (int));