2009-05-02 05:04:19 -04:00
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#include "master.hpp"
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2009-05-04 02:46:13 -04:00
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namespace factor
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{
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2009-08-25 03:55:18 -04:00
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THREADHANDLE start_thread(void *(*start_routine)(void *),void *args)
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2009-05-02 05:04:19 -04:00
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{
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pthread_attr_t attr;
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pthread_t thread;
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if (pthread_attr_init (&attr) != 0)
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2009-08-25 03:20:58 -04:00
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fatal_error("pthread_attr_init() failed",0);
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2009-08-25 13:08:45 -04:00
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if (pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_JOINABLE) != 0)
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2009-08-25 03:20:58 -04:00
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fatal_error("pthread_attr_setdetachstate() failed",0);
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2009-08-25 01:35:54 -04:00
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if (pthread_create (&thread, &attr, start_routine, args) != 0)
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2009-08-25 03:20:58 -04:00
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fatal_error("pthread_create() failed",0);
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2010-03-28 11:37:28 -04:00
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pthread_attr_destroy(&attr);
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2009-08-25 03:55:18 -04:00
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return thread;
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2009-05-02 05:04:19 -04:00
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}
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static void *null_dll;
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2009-11-19 05:49:29 -05:00
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void sleep_nanos(u64 nsec)
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2009-11-18 05:20:05 -05:00
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{
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2009-11-19 05:49:29 -05:00
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timespec ts;
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2009-11-18 16:58:48 -05:00
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timespec ts_rem;
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int ret;
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2009-11-19 05:49:29 -05:00
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ts.tv_sec = nsec / 1000000000;
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ts.tv_nsec = nsec % 1000000000;
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2009-11-18 16:58:48 -05:00
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ret = nanosleep(&ts,&ts_rem);
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while(ret == -1 && errno == EINTR)
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{
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memcpy(&ts, &ts_rem, sizeof(ts));
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ret = nanosleep(&ts, &ts_rem);
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}
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if(ret == -1)
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fatal_error("nanosleep failed", 0);
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2009-11-18 05:20:05 -05:00
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}
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2009-09-23 14:05:46 -04:00
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void factor_vm::init_ffi()
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2009-05-02 05:04:19 -04:00
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{
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2010-04-02 00:03:26 -04:00
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null_dll = dlopen(NULL,RTLD_LAZY);
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2009-05-02 05:04:19 -04:00
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}
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2009-09-23 14:05:46 -04:00
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void factor_vm::ffi_dlopen(dll *dll)
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2009-05-02 05:04:19 -04:00
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{
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2010-01-16 09:43:22 -05:00
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dll->handle = dlopen(alien_offset(dll->path), RTLD_LAZY);
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2009-05-02 05:04:19 -04:00
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}
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2009-09-23 14:05:46 -04:00
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void *factor_vm::ffi_dlsym(dll *dll, symbol_char *symbol)
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2009-05-02 05:04:19 -04:00
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{
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2010-01-16 09:43:22 -05:00
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void *handle = (dll == NULL ? null_dll : dll->handle);
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2009-05-02 05:04:19 -04:00
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return dlsym(handle,symbol);
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}
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2009-09-23 14:05:46 -04:00
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void factor_vm::ffi_dlclose(dll *dll)
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2009-05-02 05:04:19 -04:00
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{
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2010-01-16 09:43:22 -05:00
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if(dlclose(dll->handle))
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2010-03-27 07:33:28 -04:00
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general_error(ERROR_FFI,false_object,false_object);
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2010-01-16 09:43:22 -05:00
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dll->handle = NULL;
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2009-05-02 05:04:19 -04:00
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}
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2009-09-27 14:42:18 -04:00
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void factor_vm::primitive_existsp()
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2009-05-02 05:04:19 -04:00
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{
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struct stat sb;
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2009-12-18 16:59:56 -05:00
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char *path = (char *)(untag_check<byte_array>(ctx->pop()) + 1);
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ctx->push(tag_boolean(stat(path,&sb) >= 0));
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2009-05-02 05:04:19 -04:00
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}
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2010-02-03 16:12:13 -05:00
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void factor_vm::move_file(const vm_char *path1, const vm_char *path2)
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{
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int ret = 0;
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2010-03-28 12:52:16 -04:00
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do
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{
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2010-02-03 16:12:13 -05:00
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ret = rename((path1),(path2));
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2010-03-28 12:52:16 -04:00
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}
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while(ret < 0 && errno == EINTR);
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2010-02-03 16:12:13 -05:00
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if(ret < 0)
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2010-03-27 07:33:28 -04:00
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general_error(ERROR_IO,tag_fixnum(errno),false_object);
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2010-02-03 16:12:13 -05:00
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}
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2009-10-16 05:37:27 -04:00
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segment::segment(cell size_, bool executable_p)
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2009-05-02 05:04:19 -04:00
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{
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2009-09-25 22:17:20 -04:00
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size = size_;
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2009-05-02 05:04:19 -04:00
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int pagesize = getpagesize();
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2009-10-16 05:37:27 -04:00
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int prot;
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if(executable_p)
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prot = (PROT_READ | PROT_WRITE | PROT_EXEC);
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else
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prot = (PROT_READ | PROT_WRITE);
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2009-05-02 05:04:19 -04:00
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2009-10-16 05:37:27 -04:00
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char *array = (char *)mmap(NULL,pagesize + size + pagesize,prot,MAP_ANON | MAP_PRIVATE,-1,0);
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2009-10-07 09:33:54 -04:00
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if(array == (char*)-1) out_of_memory();
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2009-05-02 05:04:19 -04:00
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if(mprotect(array,pagesize,PROT_NONE) == -1)
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2009-08-25 03:20:58 -04:00
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fatal_error("Cannot protect low guard page",(cell)array);
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2009-05-02 05:04:19 -04:00
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if(mprotect(array + pagesize + size,pagesize,PROT_NONE) == -1)
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2009-08-25 03:20:58 -04:00
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fatal_error("Cannot protect high guard page",(cell)array);
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2009-05-02 05:04:19 -04:00
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2009-09-25 22:17:20 -04:00
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start = (cell)(array + pagesize);
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end = start + size;
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2009-05-02 05:04:19 -04:00
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}
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2009-09-25 22:17:20 -04:00
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segment::~segment()
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2009-05-02 05:04:19 -04:00
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{
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int pagesize = getpagesize();
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2009-09-25 22:17:20 -04:00
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int retval = munmap((void*)(start - pagesize),pagesize + size + pagesize);
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2009-05-02 05:04:19 -04:00
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if(retval)
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2009-09-25 22:17:20 -04:00
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fatal_error("Segment deallocation failed",0);
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2009-05-02 05:04:19 -04:00
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}
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2009-10-22 06:22:59 -04:00
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void factor_vm::dispatch_signal(void *uap, void (handler)())
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2009-05-02 05:04:19 -04:00
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{
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2010-03-27 09:44:20 -04:00
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UAP_STACK_POINTER(uap) = (UAP_STACK_POINTER_TYPE)fix_callstack_top((stack_frame *)UAP_STACK_POINTER(uap));
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2009-10-22 06:22:59 -04:00
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UAP_PROGRAM_COUNTER(uap) = (cell)handler;
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2010-03-28 08:29:10 -04:00
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2010-09-01 23:46:39 -04:00
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ctx->callstack_top = (stack_frame *)UAP_STACK_POINTER(uap);
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2009-09-04 14:23:20 -04:00
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}
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2009-05-02 05:04:19 -04:00
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void memory_signal_handler(int signal, siginfo_t *siginfo, void *uap)
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{
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2010-03-27 03:44:40 -04:00
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factor_vm *vm = current_vm();
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2009-10-22 06:22:59 -04:00
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vm->signal_fault_addr = (cell)siginfo->si_addr;
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vm->dispatch_signal(uap,factor::memory_signal_handler_impl);
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2009-05-02 05:04:19 -04:00
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}
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void misc_signal_handler(int signal, siginfo_t *siginfo, void *uap)
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{
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2010-03-27 03:44:40 -04:00
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factor_vm *vm = current_vm();
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2009-10-22 06:22:59 -04:00
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vm->signal_number = signal;
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vm->dispatch_signal(uap,factor::misc_signal_handler_impl);
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2009-05-02 05:04:19 -04:00
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}
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2010-09-03 01:11:45 -04:00
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void ignore_signal_handler(int signal, siginfo_t *siginfo, void *uap)
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{
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}
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2009-10-22 06:22:59 -04:00
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void fpe_signal_handler(int signal, siginfo_t *siginfo, void *uap)
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2009-09-06 09:44:25 -04:00
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{
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2010-03-27 03:44:40 -04:00
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factor_vm *vm = current_vm();
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2009-10-22 06:22:59 -04:00
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vm->signal_number = signal;
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vm->signal_fpu_status = fpu_status(uap_fpu_status(uap));
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2009-09-13 16:50:20 -04:00
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uap_clear_fpu_status(uap);
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2009-10-22 06:22:59 -04:00
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vm->dispatch_signal(uap,
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(siginfo->si_code == FPE_INTDIV || siginfo->si_code == FPE_INTOVF)
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? factor::misc_signal_handler_impl
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: factor::fp_signal_handler_impl);
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2009-09-06 09:44:25 -04:00
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}
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2009-05-02 05:04:19 -04:00
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static void sigaction_safe(int signum, const struct sigaction *act, struct sigaction *oldact)
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{
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int ret;
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do
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{
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ret = sigaction(signum, act, oldact);
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}
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while(ret == -1 && errno == EINTR);
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if(ret == -1)
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2009-08-25 03:20:58 -04:00
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fatal_error("sigaction failed", 0);
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2009-05-02 05:04:19 -04:00
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}
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2010-03-28 11:37:28 -04:00
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void factor_vm::unix_init_signals()
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2009-05-02 05:04:19 -04:00
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{
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2010-03-28 19:26:39 -04:00
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/* OpenBSD doesn't support sigaltstack() if we link against
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libpthread. See http://redmine.ruby-lang.org/issues/show/1239 */
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#ifndef __OpenBSD__
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2010-03-28 11:37:28 -04:00
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signal_callstack_seg = new segment(callstack_size,false);
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stack_t signal_callstack;
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2010-03-28 12:52:16 -04:00
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signal_callstack.ss_sp = (char *)signal_callstack_seg->start;
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2010-03-28 11:37:28 -04:00
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signal_callstack.ss_size = signal_callstack_seg->size;
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signal_callstack.ss_flags = 0;
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if(sigaltstack(&signal_callstack,(stack_t *)NULL) < 0)
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fatal_error("sigaltstack() failed",0);
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2010-03-28 19:26:39 -04:00
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#endif
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2010-03-28 11:37:28 -04:00
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2009-05-02 05:04:19 -04:00
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struct sigaction memory_sigaction;
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struct sigaction misc_sigaction;
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2009-09-06 09:44:25 -04:00
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struct sigaction fpe_sigaction;
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2009-05-02 05:04:19 -04:00
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struct sigaction ignore_sigaction;
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memset(&memory_sigaction,0,sizeof(struct sigaction));
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sigemptyset(&memory_sigaction.sa_mask);
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memory_sigaction.sa_sigaction = memory_signal_handler;
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2010-03-28 11:37:28 -04:00
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memory_sigaction.sa_flags = SA_SIGINFO | SA_ONSTACK;
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2009-05-02 05:04:19 -04:00
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sigaction_safe(SIGBUS,&memory_sigaction,NULL);
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sigaction_safe(SIGSEGV,&memory_sigaction,NULL);
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2009-09-06 09:44:25 -04:00
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memset(&fpe_sigaction,0,sizeof(struct sigaction));
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sigemptyset(&fpe_sigaction.sa_mask);
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fpe_sigaction.sa_sigaction = fpe_signal_handler;
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2010-03-28 11:37:28 -04:00
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fpe_sigaction.sa_flags = SA_SIGINFO | SA_ONSTACK;
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2009-09-06 09:44:25 -04:00
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sigaction_safe(SIGFPE,&fpe_sigaction,NULL);
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2009-05-02 05:04:19 -04:00
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memset(&misc_sigaction,0,sizeof(struct sigaction));
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sigemptyset(&misc_sigaction.sa_mask);
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misc_sigaction.sa_sigaction = misc_signal_handler;
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2010-03-28 11:37:28 -04:00
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misc_sigaction.sa_flags = SA_SIGINFO | SA_ONSTACK;
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2009-05-02 05:04:19 -04:00
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sigaction_safe(SIGQUIT,&misc_sigaction,NULL);
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sigaction_safe(SIGILL,&misc_sigaction,NULL);
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2010-09-03 01:11:45 -04:00
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/* We don't use SA_IGN here because then the ignore action is inherited
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by subprocesses, which we don't want. There is a unit test in
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io.launcher.unix for this. */
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2009-05-02 05:04:19 -04:00
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memset(&ignore_sigaction,0,sizeof(struct sigaction));
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sigemptyset(&ignore_sigaction.sa_mask);
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2010-09-03 01:11:45 -04:00
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ignore_sigaction.sa_sigaction = ignore_signal_handler;
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ignore_sigaction.sa_flags = SA_SIGINFO | SA_ONSTACK;
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2009-05-02 05:04:19 -04:00
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sigaction_safe(SIGPIPE,&ignore_sigaction,NULL);
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}
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/* On Unix, shared fds such as stdin cannot be set to non-blocking mode
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(http://homepages.tesco.net/J.deBoynePollard/FGA/dont-set-shared-file-descriptors-to-non-blocking-mode.html)
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so we kludge around this by spawning a thread, which waits on a control pipe
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for a signal, upon receiving this signal it reads one block of data from stdin
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and writes it to a data pipe. Upon completion, it writes a 4-byte integer to
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the size pipe, indicating how much data was written to the data pipe.
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The read end of the size pipe can be set to non-blocking. */
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extern "C" {
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int stdin_read;
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int stdin_write;
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int control_read;
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int control_write;
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int size_read;
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int size_write;
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}
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void safe_close(int fd)
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{
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if(close(fd) < 0)
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2009-08-25 03:20:58 -04:00
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fatal_error("error closing fd",errno);
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2009-05-02 05:04:19 -04:00
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}
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bool check_write(int fd, void *data, ssize_t size)
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{
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if(write(fd,data,size) == size)
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return true;
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else
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{
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if(errno == EINTR)
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return check_write(fd,data,size);
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else
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return false;
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}
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}
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void safe_write(int fd, void *data, ssize_t size)
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{
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if(!check_write(fd,data,size))
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2009-08-25 03:20:58 -04:00
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fatal_error("error writing fd",errno);
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2009-05-02 05:04:19 -04:00
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}
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bool safe_read(int fd, void *data, ssize_t size)
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{
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ssize_t bytes = read(fd,data,size);
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if(bytes < 0)
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{
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if(errno == EINTR)
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return safe_read(fd,data,size);
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else
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{
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2009-08-25 03:20:58 -04:00
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fatal_error("error reading fd",errno);
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2009-05-02 05:04:19 -04:00
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return false;
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}
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}
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else
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return (bytes == size);
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}
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void *stdin_loop(void *arg)
|
|
|
|
{
|
|
|
|
unsigned char buf[4096];
|
|
|
|
bool loop_running = true;
|
|
|
|
|
|
|
|
while(loop_running)
|
|
|
|
{
|
|
|
|
if(!safe_read(control_read,buf,1))
|
|
|
|
break;
|
|
|
|
|
|
|
|
if(buf[0] != 'X')
|
2009-08-25 03:20:58 -04:00
|
|
|
fatal_error("stdin_loop: bad data on control fd",buf[0]);
|
2009-05-02 05:04:19 -04:00
|
|
|
|
|
|
|
for(;;)
|
|
|
|
{
|
|
|
|
ssize_t bytes = read(0,buf,sizeof(buf));
|
|
|
|
if(bytes < 0)
|
|
|
|
{
|
|
|
|
if(errno == EINTR)
|
|
|
|
continue;
|
|
|
|
else
|
|
|
|
{
|
|
|
|
loop_running = false;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else if(bytes >= 0)
|
|
|
|
{
|
|
|
|
safe_write(size_write,&bytes,sizeof(bytes));
|
|
|
|
|
|
|
|
if(!check_write(stdin_write,buf,bytes))
|
|
|
|
loop_running = false;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
safe_close(stdin_write);
|
|
|
|
safe_close(control_read);
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2010-09-16 01:20:24 -04:00
|
|
|
void safe_pipe(int *in, int *out)
|
2009-05-02 05:04:19 -04:00
|
|
|
{
|
|
|
|
int filedes[2];
|
|
|
|
|
|
|
|
if(pipe(filedes) < 0)
|
2010-09-16 01:20:24 -04:00
|
|
|
fatal_error("Error opening pipe",errno);
|
2009-05-02 05:04:19 -04:00
|
|
|
|
2010-09-16 01:20:24 -04:00
|
|
|
*in = filedes[0];
|
|
|
|
*out = filedes[1];
|
2009-05-02 05:04:19 -04:00
|
|
|
|
2010-09-16 01:20:24 -04:00
|
|
|
if(fcntl(*in,F_SETFD,FD_CLOEXEC) < 0)
|
|
|
|
fatal_error("Error with fcntl",errno);
|
2009-05-02 05:04:19 -04:00
|
|
|
|
2010-09-16 01:20:24 -04:00
|
|
|
if(fcntl(*out,F_SETFD,FD_CLOEXEC) < 0)
|
|
|
|
fatal_error("Error with fcntl",errno);
|
|
|
|
}
|
2009-05-02 05:04:19 -04:00
|
|
|
|
2010-09-16 01:20:24 -04:00
|
|
|
void open_console()
|
|
|
|
{
|
|
|
|
safe_pipe(&control_read,&control_write);
|
|
|
|
safe_pipe(&size_read,&size_write);
|
|
|
|
safe_pipe(&stdin_read,&stdin_write);
|
2009-08-25 01:35:54 -04:00
|
|
|
start_thread(stdin_loop,NULL);
|
2009-05-02 05:04:19 -04:00
|
|
|
}
|
|
|
|
|
2009-05-04 02:46:13 -04:00
|
|
|
}
|