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388938ac1e
The configure checks for sigcontext (aka sigcontext_struct) have failed
for a long time without anyone noticing. The MR_GET_FAULT_ADDR macro
that is also needed for the sigcontext code paths was only ever defined
for __i386__ and __mc68000__.
According to the sigaction(2) man page, the struct sigcontext
argument was obsoleted by the introduction of the SA_SIGINFO flag
(which we also have code for, though also not working either).
configure.ac:
Delete checks related to struct sigcontext.
Delete check for asm/sigcontext.h
runtime/mercury_conf.h.in:
Delete macros that are no longer defined.
runtime/mercury_memory_handlers.c:
runtime/mercury_signal.c:
runtime/mercury_signal.h:
Delete code for using signal handlers that take a sigcontext argument.
Add XXX where native GC casts a context parameter to
struct sigcontext * when it should be a ucontext_t *.
Possibly never tested.
runtime/mercury_faultaddr.h:
Delete this file containing only the MR_GET_FAULT_ADDR macro which is
no longer used.
runtime/RESERVED_MACRO_NAMES:
ssdb/RESERVED_MACRO_NAMES:
trace/RESERVED_MACRO_NAMES:
Delete macros that are no longer defined.
tools/configure_mingw_cross:
Don't need to set variables mercury_cv_sigcontext_struct_2arg and
mercury_cv_sigcontext_struct_3arg any more.
77 lines
2.7 KiB
C
77 lines
2.7 KiB
C
// vim: ts=4 sw=4 expandtab ft=c
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// Copyright (C) 1998, 2000, 2002, 2004-2005, 2010 The University of Melbourne.
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// Copyright (C) 2016, 2018, 2020 The Mercury team.
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// This file is distributed under the terms specified in COPYING.LIB.
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// mercury_signal.h - functions for setting up signal handlers.
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//
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// This defines a generic signal handler setup mechanism.
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#ifndef MERCURY_SIGNAL_H
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#define MERCURY_SIGNAL_H
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#include "mercury_regs.h" // include before system headers
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#include "mercury_conf.h"
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#include <signal.h>
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#include "mercury_types.h"
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#include "mercury_std.h"
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#ifdef MR_HAVE_SIGACTION
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typedef struct sigaction MR_signal_action;
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#else
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typedef MR_Code * MR_signal_action;
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#endif
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// MR_setup_signal sets a signal handler (handler) to handle signals
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// of the given signal type (sig).
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// If the handler cannot be setup, it aborts with the given error message.
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//
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// If the signal handler requires siginfo to be provided (e.g. it needs
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// access to stored registers), need_info must be MR_TRUE.
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// Note that on some platforms, signal information is provided
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// regardless of the value of need_info.
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extern void MR_setup_signal(int sig, MR_Code *handler, MR_bool need_info,
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const char * error_message);
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// As above, but don't arrange for system calls to be restarted
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// if the signal is received.
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extern void MR_setup_signal_no_restart(int sig, MR_Code *handler,
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MR_bool need_info, const char * error_message);
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// Reset a signal to its default handler. (see SIG_DFL in signal(2)).
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extern void MR_reset_signal(int sig);
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// As above, but initialize a signal action suitable to be passed to
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// MR_set_signal_action rather than setting a signal handler for a signal.
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extern void MR_init_signal_action(MR_signal_action* act, MR_Code *handler,
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MR_bool need_info, MR_bool should_restart_system_call);
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// Get the current action for the given signal.
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// If the action cannot be retrieved, it aborts with the given error message.
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extern void MR_get_signal_action(int sig, MR_signal_action *old_action,
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const char *error_message);
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// Restore the action for the given signal to the result
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// of a previous call to MR_get_signal_action().
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// If the action cannot be set, it aborts with the given error message.
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extern void MR_set_signal_action(int sig, MR_signal_action *action,
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const char *error_message);
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// Change the behaviour of system calls when the specified signal
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// is received. If restart is MR_TRUE, they will be restarted;
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// if it is MR_FALSE, they won't. This function may have no effect
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// on some systems.
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extern void MR_signal_should_restart(int sig, MR_bool restart);
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#endif // not MERCURY_SIGNAL_H
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