Changes in libcfa/src/interpose.cfa [9cd5bd2:032234bd]
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libcfa/src/interpose.cfa
r9cd5bd2 r032234bd 42 42 43 43 typedef void (* generic_fptr_t)(void); 44 static generic_fptr_t do_interpose_symbol( void * library, const char symbol[], const char version[] ) {45 const char * error;46 47 union { generic_fptr_t fptr; void * ptr; } originalFunc;48 49 #if defined( _GNU_SOURCE )50 if ( version ) {51 originalFunc.ptr = dlvsym( library, symbol, version );52 } else {53 originalFunc.ptr = dlsym( library, symbol );54 }55 #else56 originalFunc.ptr = dlsym( library, symbol );57 #endif // _GNU_SOURCE58 59 error = dlerror();60 if ( error ) abort( "interpose_symbol : internal error, %s\n", error );61 62 return originalFunc.fptr;63 }64 65 44 static generic_fptr_t interpose_symbol( const char symbol[], const char version[] ) { 66 45 const char * error; 67 46 68 47 static void * library; 69 static void * pthread_library;70 48 if ( ! library ) { 71 49 #if defined( RTLD_NEXT ) … … 80 58 #endif 81 59 } // if 82 if ( ! pthread_library ) { 83 #if defined( RTLD_NEXT ) 84 pthread_library = RTLD_NEXT; 85 #else 86 // missing RTLD_NEXT => must hard-code library name, assuming libstdc++ 87 pthread_library = dlopen( "libpthread.so", RTLD_LAZY ); 88 error = dlerror(); 89 if ( error ) { 90 abort( "interpose_symbol : failed to open libpthread, %s\n", error ); 91 } 92 #endif 93 } // if 94 95 return do_interpose_symbol(library, symbol, version); 60 61 union { generic_fptr_t fptr; void * ptr; } originalFunc; 62 63 #if defined( _GNU_SOURCE ) 64 if ( version ) { 65 originalFunc.ptr = dlvsym( library, symbol, version ); 66 } else { 67 originalFunc.ptr = dlsym( library, symbol ); 68 } 69 #else 70 originalFunc.ptr = dlsym( library, symbol ); 71 #endif // _GNU_SOURCE 72 73 error = dlerror(); 74 if ( error ) abort( "interpose_symbol : internal error, %s\n", error ); 75 76 return originalFunc.fptr; 96 77 } 97 78 … … 116 97 117 98 extern "C" { 118 void __cfathreadabi_interpose_startup( generic_fptr_t (*do_interpose_symbol)( void * library, const char symbol[], const char version[] ) ) __attribute__((weak));119 99 void __cfaabi_interpose_startup( void ) { 120 100 const char *version = 0p; … … 128 108 INTERPOSE_LIBC( exit , version ); 129 109 #pragma GCC diagnostic pop 130 131 if(__cfathreadabi_interpose_startup) __cfathreadabi_interpose_startup( do_interpose_symbol );132 110 133 111 // As a precaution (and necessity), errors that result in termination are delivered on a separate stack because
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