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111
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1 /* except.h -*-C++-*-
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2 *
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3 *************************************************************************
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4 *
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5 * Copyright (C) 2009-2016, Intel Corporation
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6 * All rights reserved.
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7 *
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8 * Redistribution and use in source and binary forms, with or without
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9 * modification, are permitted provided that the following conditions
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10 * are met:
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11 *
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12 * * Redistributions of source code must retain the above copyright
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13 * notice, this list of conditions and the following disclaimer.
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14 * * Redistributions in binary form must reproduce the above copyright
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15 * notice, this list of conditions and the following disclaimer in
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16 * the documentation and/or other materials provided with the
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17 * distribution.
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18 * * Neither the name of Intel Corporation nor the names of its
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19 * contributors may be used to endorse or promote products derived
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20 * from this software without specific prior written permission.
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21 *
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22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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25 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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26 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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29 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
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32 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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33 * POSSIBILITY OF SUCH DAMAGE.
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34 *
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35 * *********************************************************************
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36 *
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37 * PLEASE NOTE: This file is a downstream copy of a file mainitained in
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38 * a repository at cilkplus.org. Changes made to this file that are not
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39 * submitted through the contribution process detailed at
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40 * http://www.cilkplus.org/submit-cilk-contribution will be lost the next
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41 * time that a new version is released. Changes only submitted to the
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42 * GNU compiler collection or posted to the git repository at
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43 * https://bitbucket.org/intelcilkruntime/intel-cilk-runtime.git are
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44 * not tracked.
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45 *
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46 * We welcome your contributions to this open source project. Thank you
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47 * for your assistance in helping us improve Cilk Plus.
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48 **************************************************************************/
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49
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50 /**
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51 * @file except.h
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52 *
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53 * @brief Common definitions for the various implementations of exception
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54 * handling.
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55 */
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56
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57 #ifndef INCLUDED_EXCEPT_DOT_H
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58 #define INCLUDED_EXCEPT_DOT_H
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59
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60 #include <cilk/common.h>
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61 #include <internal/abi.h>
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62 #include "full_frame.h"
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63
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64 __CILKRTS_BEGIN_EXTERN_C
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65
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66 /**
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67 * OS-dependent information about an exception that's being moved between
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68 * strands.
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69 */
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70 typedef struct pending_exception_info pending_exception_info;
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71
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72 /**
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73 * Merge the right exception record into the left. The left is logically
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74 * earlier.
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75 *
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76 * On entry the left state is synched and can not have an unresolved
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77 * exception. The merge may result in an unresolved exception.
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78 *
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79 * If there is both a right and left exception, the right exception will
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80 * be disposed of in preference to the left exception, destructing the
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81 * exception object.
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82 *
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83 * @param w The worker that is preparing to resume execution.
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84 * @param left_exception The exception that would have happened earlier
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85 * if the code executed serially. Can be NULL if the left strand has not
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86 * raised an exception.
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87 * @param right_exception The exception that would have happened later
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88 * if the code executed serially. Can be NULL if the right strand has not
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89 * raised an exception.
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90 *
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91 * @return NULL if there both the right and left exception are NULL. This
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92 * indicates that there are no pending exceptions.
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93 * @return The pending exception that is to be raised to continue searching
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94 * for a catch block to handle the exception.
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95 */
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96 COMMON_SYSDEP
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97 struct pending_exception_info *__cilkrts_merge_pending_exceptions(
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98 __cilkrts_worker *w,
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99 pending_exception_info *left_exception,
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100 pending_exception_info *right_exception);
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101
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102 /**
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103 * Move the exception information from the worker to the full_frame.
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104 *
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105 * @param w The worker which is suspending work on a full_frame.
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106 * @param ff The full_frame which is being suspended.
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107 */
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108 COMMON_SYSDEP
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109 void __cilkrts_save_exception_state(__cilkrts_worker *w,
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110 full_frame *ff);
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111
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112 /**
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113 * Function to delete pending exception. This will delete the
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114 * exception object and then free the stack/fiber.
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115 *
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116 * @param w The worker we're running on.
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117 * @param pei The pending exception to be delete
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118 * @param delete_object Unused. Should always be 1.
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119 */
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120 void delete_exception_obj (__cilkrts_worker *w,
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121 struct pending_exception_info *pei,
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122 int delete_object);
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123
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124 #ifndef _WIN32
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125 /* gcc-style exception handling */
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126 NON_COMMON NORETURN __cilkrts_c_sync_except(__cilkrts_worker *w,
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127 __cilkrts_stack_frame *sf);
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128 NON_COMMON void __attribute__((nonnull))
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129 __cilkrts_gcc_rethrow(__cilkrts_stack_frame *sf);
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130 #endif
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131
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132 __CILKRTS_END_EXTERN_C
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133
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134 #endif // ! defined(INCLUDED_EXCEPT_DOT_H)
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