1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2022 University of Waterloo |
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3 | // |
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4 | // The contents of this file are covered under the licence agreement in the |
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5 | // file "LICENCE" distributed with Cforall. |
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6 | // |
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7 | // interpose_thread.c -- |
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8 | // |
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9 | // Author : Thierry Delisle |
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10 | // Created On : Wed Sep 21 11:55:16 2022 |
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11 | // Last Modified By : |
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12 | // Last Modified On : |
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13 | // Update Count : |
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14 | // |
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15 | |
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16 | #include <stdarg.h> // va_start, va_end |
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17 | #include <stdio.h> |
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18 | #include <string.h> // strlen |
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19 | extern "C" { |
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20 | #include <dlfcn.h> // dlopen, dlsym |
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21 | #include <execinfo.h> // backtrace, messages |
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22 | } |
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23 | |
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24 | #include "bits/debug.hfa" |
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25 | #include "bits/defs.hfa" |
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26 | #include <assert.h> |
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27 | |
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28 | //============================================================================================= |
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29 | // Interposing helpers |
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30 | //============================================================================================= |
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31 | |
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32 | typedef void (* generic_fptr_t)(void); |
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33 | |
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34 | generic_fptr_t interpose_symbol( |
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35 | generic_fptr_t (*do_interpose_symbol)( void * library, const char symbol[], const char version[] ), |
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36 | const char symbol[], |
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37 | const char version[] |
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38 | ) libcfa_public { |
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39 | const char * error; |
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40 | |
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41 | static void * library; |
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42 | if ( ! library ) { |
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43 | #if defined( RTLD_NEXT ) |
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44 | library = RTLD_NEXT; |
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45 | #else |
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46 | // missing RTLD_NEXT => must hard-code library name, assuming libstdc++ |
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47 | library = dlopen( "libpthread.so", RTLD_LAZY ); |
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48 | error = dlerror(); |
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49 | if ( error ) { |
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50 | abort( "interpose_symbol : failed to open libpthread, %s\n", error ); |
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51 | } |
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52 | #endif |
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53 | } // if |
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54 | |
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55 | return do_interpose_symbol(library, symbol, version); |
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56 | } |
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57 | |
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58 | #define INTERPOSE( x, ver ) __cabi_libpthread.x = (typeof(__cabi_libpthread.x))interpose_symbol( do_interpose_symbol, #x, ver ) |
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59 | |
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60 | //============================================================================================= |
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61 | // Interposition Startup logic |
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62 | //============================================================================================= |
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63 | |
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64 | static struct { |
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65 | int (*pthread_create)(pthread_t *_thread, const pthread_attr_t *attr, void *(*start_routine) (void *), void *arg); |
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66 | int (*pthread_join)(pthread_t _thread, void **retval); |
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67 | pthread_t (*pthread_self)(void); |
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68 | int (*pthread_attr_init)(pthread_attr_t *attr); |
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69 | int (*pthread_attr_destroy)(pthread_attr_t *attr); |
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70 | int (*pthread_attr_setstack)( pthread_attr_t *attr, void *stackaddr, size_t stacksize ); |
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71 | int (*pthread_attr_getstacksize)( const pthread_attr_t *attr, size_t *stacksize ); |
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72 | int (*pthread_sigmask)(int how, const sigset_t *set, sigset_t *oldset); |
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73 | int (*pthread_sigqueue)(pthread_t _thread, int sig, const union sigval value); |
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74 | } __cabi_libpthread; |
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75 | |
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76 | extern "C" { |
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77 | void __cfathreadabi_interpose_startup( generic_fptr_t (*do_interpose_symbol)( void * library, const char symbol[], const char version[] ) ) libcfa_public { |
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78 | const char *version = 0p; |
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79 | |
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80 | #pragma GCC diagnostic push |
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81 | #pragma GCC diagnostic ignored "-Wdiscarded-qualifiers" |
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82 | INTERPOSE( pthread_create , version ); |
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83 | INTERPOSE( pthread_join , version ); |
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84 | INTERPOSE( pthread_self , version ); |
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85 | INTERPOSE( pthread_attr_init , version ); |
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86 | INTERPOSE( pthread_attr_destroy , version ); |
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87 | INTERPOSE( pthread_attr_setstack , version ); |
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88 | INTERPOSE( pthread_attr_getstacksize , version ); |
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89 | INTERPOSE( pthread_sigmask , version ); |
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90 | INTERPOSE( pthread_sigqueue , version ); |
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91 | #pragma GCC diagnostic pop |
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92 | } |
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93 | |
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94 | int __cfaabi_pthread_create(pthread_t *_thread, const pthread_attr_t *attr, void *(*start_routine) (void *), void *arg){ |
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95 | return __cabi_libpthread.pthread_create(_thread, attr, start_routine, arg); |
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96 | } |
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97 | |
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98 | int __cfaabi_pthread_join(pthread_t _thread, void **retval){ |
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99 | return __cabi_libpthread.pthread_join(_thread, retval); |
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100 | } |
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101 | |
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102 | pthread_t __cfaabi_pthread_self(void){ |
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103 | return __cabi_libpthread.pthread_self(); |
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104 | } |
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105 | int __cfaabi_pthread_attr_init(pthread_attr_t *attr){ |
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106 | return __cabi_libpthread.pthread_attr_init(attr); |
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107 | } |
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108 | int __cfaabi_pthread_attr_destroy(pthread_attr_t *attr){ |
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109 | return __cabi_libpthread.pthread_attr_destroy(attr); |
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110 | } |
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111 | int __cfaabi_pthread_attr_setstack( pthread_attr_t *attr, void *stackaddr, size_t stacksize ){ |
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112 | return __cabi_libpthread.pthread_attr_setstack(attr, stackaddr, stacksize); |
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113 | } |
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114 | int read_pthread_attr_getstacksize( const pthread_attr_t *attr, size_t *stacksize ){ |
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115 | return __cabi_libpthread.pthread_attr_getstacksize(attr, stacksize); |
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116 | } |
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117 | int __cfaabi_pthread_sigmask(int how, const sigset_t *set, sigset_t *oldset){ |
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118 | return __cabi_libpthread.pthread_sigmask(how, set, oldset); |
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119 | } |
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120 | int __cfaabi_pthread_sigqueue(pthread_t _thread, int sig, const union sigval value){ |
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121 | return __cabi_libpthread.pthread_sigqueue(_thread, sig, value); |
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122 | } |
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123 | } |
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