45 lines
2.0 KiB
C
45 lines
2.0 KiB
C
/* Stack overflow handling.
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Copyright (C) 2002, 2004, 2008 Free Software Foundation, Inc.
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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.
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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.
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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/>. */
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/* 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.
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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.
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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. */
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extern int c_stack_action (void (* /*action*/) (int));
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