source: libcfa/src/interpose_thread.cfa @ 1842167

Last change on this file since 1842167 was e10714a, checked in by Peter A. Buhr <pabuhr@…>, 19 months ago

update interpose code, and document 32-bit interpose bug in glibc

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File size: 4.7 KB
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1//
2// Cforall Version 1.0.0 Copyright (C) 2022 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// interpose_thread.c --
8//
9// Author           : Thierry Delisle
10// Created On       : Wed Sep 21 11:55:16 2022
11// Last Modified By :
12// Last Modified On :
13// Update Count     :
14//
15
16// BUG in 32-bit gcc with interpose: fixed in >= gcc-9.5, gcc-10.4, gcc-12.2
17#ifdef __i386__                                                                                 // 32-bit architecture
18#undef _GNU_SOURCE
19#endif // __i386__
20
21#include <signal.h>
22#include <pthread.h>
23#include <signal.h>
24extern "C" {
25#include <dlfcn.h>                                                                              // dlopen, dlsym
26}
27
28#include "bits/defs.hfa"
29
30//=============================================================================================
31// Interposing helpers
32//=============================================================================================
33
34typedef void (* generic_fptr_t)(void);
35
36generic_fptr_t libcfa_public interpose_symbol(
37        generic_fptr_t (*do_interpose_symbol)( void * library, const char symbol[], const char version[] ),
38        const char symbol[],
39        const char version[]
40) {
41        void * library;
42
43        #if defined( RTLD_NEXT )
44        library = RTLD_NEXT;
45        #else
46        // missing RTLD_NEXT => must hard-code library name, assuming libstdc++
47        library = dlopen( "libpthread.so", RTLD_LAZY );
48        if ( ! library ) {                                                                      // == nullptr
49                abort( "interpose_symbol : failed to open libpthread, %s\n", dlerror() );
50        } // if
51        #endif // RTLD_NEXT
52
53        return do_interpose_symbol( library, symbol, version );
54}
55
56#define INTERPOSE( x, ver ) __cabi_libpthread.x = (typeof(__cabi_libpthread.x))interpose_symbol( do_interpose_symbol, #x, ver )
57
58//=============================================================================================
59// Interposition Startup logic
60//=============================================================================================
61
62static struct {
63        int (*pthread_create)(pthread_t *_thread, const pthread_attr_t *attr, void *(*start_routine) (void *), void *arg);
64        int (*pthread_join)(pthread_t _thread, void **retval);
65        pthread_t (*pthread_self)(void);
66        int (*pthread_attr_init)(pthread_attr_t *attr);
67        int (*pthread_attr_destroy)(pthread_attr_t *attr);
68        int (*pthread_attr_setstack)( pthread_attr_t *attr, void *stackaddr, size_t stacksize );
69        int (*pthread_attr_getstacksize)( const pthread_attr_t *attr, size_t *stacksize );
70        int (*pthread_sigmask)(int how, const sigset_t *set, sigset_t *oldset);
71        int (*pthread_sigqueue)(pthread_t _thread, int sig, const union sigval value);
72        int (*pthread_once)(pthread_once_t *once_control, void (*init_routine)(void));
73} __cabi_libpthread;
74
75extern "C" {
76        void __cfathreadabi_interpose_startup( generic_fptr_t (*do_interpose_symbol)( void * library, const char symbol[], const char version[] ) ) libcfa_public {
77                const char *version = 0p;
78
79#pragma GCC diagnostic push
80#pragma GCC diagnostic ignored "-Wdiscarded-qualifiers"
81                INTERPOSE( pthread_create, version );
82                INTERPOSE( pthread_join, version );
83                INTERPOSE( pthread_self, version );
84                INTERPOSE( pthread_attr_init, version );
85                INTERPOSE( pthread_attr_destroy, version );
86                INTERPOSE( pthread_attr_setstack, version );
87                INTERPOSE( pthread_attr_getstacksize, version );
88                INTERPOSE( pthread_sigmask, version );
89                INTERPOSE( pthread_sigqueue, version );
90                INTERPOSE( pthread_once, version );
91#pragma GCC diagnostic pop
92        }
93
94        int __cfaabi_pthread_create(pthread_t *_thread, const pthread_attr_t *attr, void *(*start_routine) (void *), void *arg){
95                return __cabi_libpthread.pthread_create(_thread, attr, start_routine, arg);
96        }
97
98        int __cfaabi_pthread_join(pthread_t _thread, void **retval){
99                return __cabi_libpthread.pthread_join(_thread, retval);
100        }
101
102        pthread_t __cfaabi_pthread_self(void){
103                return __cabi_libpthread.pthread_self();
104        }
105
106        int __cfaabi_pthread_attr_init(pthread_attr_t *attr){
107                return __cabi_libpthread.pthread_attr_init(attr);
108        }
109
110        int __cfaabi_pthread_attr_destroy(pthread_attr_t *attr){
111                return __cabi_libpthread.pthread_attr_destroy(attr);
112        }
113
114        int __cfaabi_pthread_attr_setstack( pthread_attr_t *attr, void *stackaddr, size_t stacksize ){
115                return __cabi_libpthread.pthread_attr_setstack(attr, stackaddr, stacksize);
116        }
117
118        int read_pthread_attr_getstacksize( const pthread_attr_t *attr, size_t *stacksize ){
119                return __cabi_libpthread.pthread_attr_getstacksize(attr, stacksize);
120        }
121
122        int __cfaabi_pthread_sigmask(int how, const sigset_t *set, sigset_t *oldset){
123                return __cabi_libpthread.pthread_sigmask(how, set, oldset);
124        }
125
126        int __cfaabi_pthread_sigqueue(pthread_t _thread, int sig, const union sigval value) {
127                return __cabi_libpthread.pthread_sigqueue(_thread, sig, value);
128        }
129
130        int __cfaabi_pthread_once(pthread_once_t *once_control, void (*init_routine)(void)) {
131                return __cabi_libpthread.pthread_once(once_control, init_routine);
132        }
133}
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