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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2011-05-20 18:11:50 -04:00
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void *factor_vm::ffi_dlsym_raw(dll *dll, symbol_char *symbol)
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{
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return dlsym(dll ? dll->handle : null_dll, 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_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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2011-05-20 18:11:50 -04:00
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return FUNCTION_CODE_POINTER(ffi_dlsym_raw(dll, symbol));
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}
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#ifdef FACTOR_PPC
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void *factor_vm::ffi_dlsym_toc(dll *dll, symbol_char *symbol)
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{
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return FUNCTION_TOC_POINTER(ffi_dlsym_raw(dll, symbol));
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2009-05-02 05:04:19 -04:00
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}
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2011-05-20 18:11:50 -04:00
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#endif
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2009-05-02 05:04:19 -04:00
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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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2011-10-21 14:49:34 -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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2011-10-21 14:49:34 -04:00
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int pagesize = getpagesize();
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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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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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2011-10-21 14:49:34 -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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2011-10-21 14:49:34 -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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2011-10-21 14:49:34 -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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2011-10-21 14:49:34 -04:00
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start = (cell)(array + pagesize);
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2009-09-25 22:17:20 -04:00
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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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2011-10-17 16:46:25 -04:00
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void code_heap::guard_safepoint()
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{
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if(mprotect(safepoint_page,getpagesize(),PROT_NONE) == -1)
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fatal_error("Cannot protect safepoint guard page",(cell)safepoint_page);
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}
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void code_heap::unguard_safepoint()
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{
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if(mprotect(safepoint_page,getpagesize(),PROT_WRITE) == -1)
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fatal_error("Cannot unprotect safepoint guard page",(cell)safepoint_page);
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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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2011-10-21 00:30:40 -04:00
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dispatch_signal_handler(
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2011-10-26 19:22:42 -04:00
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(cell*)&UAP_STACK_POINTER(uap),
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(cell*)&UAP_PROGRAM_COUNTER(uap),
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(cell)FUNCTION_CODE_POINTER(handler)
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2011-10-21 00:30:40 -04:00
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);
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2011-05-20 18:11:50 -04:00
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UAP_SET_TOC_POINTER(uap, (cell)FUNCTION_TOC_POINTER(handler));
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2009-09-04 14:23:20 -04:00
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}
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2011-10-28 18:42:33 -04:00
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void factor_vm::start_sampling_profiler_timer()
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{
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struct itimerval timer;
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memset((void*)&timer, 0, sizeof(struct itimerval));
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2011-11-01 00:31:41 -04:00
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timer.it_value.tv_usec = 1000000/samples_per_second;
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timer.it_interval.tv_usec = 1000000/samples_per_second;
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2011-10-28 18:42:33 -04:00
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setitimer(ITIMER_REAL, &timer, NULL);
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}
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void factor_vm::end_sampling_profiler_timer()
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{
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struct itimerval timer;
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memset((void*)&timer, 0, sizeof(struct itimerval));
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setitimer(ITIMER_REAL, &timer, NULL);
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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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2011-10-19 18:39:44 -04:00
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void synchronous_signal_handler(int signal, siginfo_t *siginfo, void *uap)
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2009-05-02 05:04:19 -04:00
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{
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2011-10-20 01:47:14 -04:00
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factor_vm *vm = current_vm_p();
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if (vm)
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{
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vm->signal_number = signal;
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vm->dispatch_signal(uap,factor::synchronous_signal_handler_impl);
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} else
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2011-10-27 23:24:51 -04:00
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fatal_error("Foreign thread received signal", signal);
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2011-10-19 18:39:44 -04:00
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}
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2011-10-21 00:00:25 -04:00
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void enqueue_signal_handler(int signal, siginfo_t *siginfo, void *uap)
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2011-10-19 18:39:44 -04:00
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{
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factor_vm *vm = current_vm_p();
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if (vm)
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2011-11-07 15:51:49 -05:00
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vm->safepoint.enqueue_signal(signal);
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2011-10-20 01:47:14 -04:00
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else
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2011-10-27 23:24:51 -04:00
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fatal_error("Foreign thread received signal", signal);
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2009-05-02 05:04:19 -04:00
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}
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2011-10-21 00:00:25 -04:00
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void fep_signal_handler(int signal, siginfo_t *siginfo, void *uap)
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{
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factor_vm *vm = current_vm_p();
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if (vm)
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2011-11-07 17:05:31 -05:00
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vm->safepoint.enqueue_fep(signal);
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2011-10-21 00:00:25 -04:00
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else
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2011-10-27 23:24:51 -04:00
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fatal_error("Foreign thread received signal", signal);
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2011-10-21 00:00:25 -04:00
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}
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void sample_signal_handler(int signal, siginfo_t *siginfo, void *uap)
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{
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factor_vm *vm = current_vm_p();
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if (vm)
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2011-11-07 15:51:49 -05:00
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vm->safepoint.enqueue_samples(1, (cell)UAP_PROGRAM_COUNTER(uap), false);
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2011-10-31 03:10:30 -04:00
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else if (thread_vms.size() == 1) {
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factor_vm *the_only_vm = thread_vms.begin()->second;
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2011-11-07 15:51:49 -05:00
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the_only_vm->safepoint.enqueue_samples(1, (cell)UAP_PROGRAM_COUNTER(uap), true);
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2011-10-31 03:10:30 -04:00
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}
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2011-10-21 00:00:25 -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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2011-10-19 18:39:44 -04:00
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? factor::synchronous_signal_handler_impl
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2009-10-22 06:22:59 -04:00
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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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2011-10-21 00:00:25 -04:00
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static void init_sigaction_with_handler(struct sigaction *act,
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void (*handler)(int, siginfo_t*, void*))
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{
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memset(act, 0, sizeof(struct sigaction));
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sigemptyset(&act->sa_mask);
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act->sa_sigaction = handler;
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act->sa_flags = SA_SIGINFO | SA_ONSTACK;
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}
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2011-11-07 15:51:49 -05:00
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static void safe_pipe(int *in, int *out)
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{
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int filedes[2];
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if(pipe(filedes) < 0)
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fatal_error("Error opening pipe",errno);
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*in = filedes[0];
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*out = filedes[1];
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if(fcntl(*in,F_SETFD,FD_CLOEXEC) < 0)
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fatal_error("Error with fcntl",errno);
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if(fcntl(*out,F_SETFD,FD_CLOEXEC) < 0)
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fatal_error("Error with fcntl",errno);
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}
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static void init_signal_pipe(factor_vm *vm)
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{
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safe_pipe(&vm->signal_pipe_input, &vm->signal_pipe_output);
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vm->special_objects[OBJ_SIGNAL_PIPE] = tag_fixnum(vm->signal_pipe_output);
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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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2011-11-07 15:51:49 -05:00
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init_signal_pipe(this);
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2011-11-03 14:50:23 -04:00
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|
|
signal_callstack_seg = new segment(callstack_size,false);
|
|
|
|
|
|
|
|
stack_t signal_callstack;
|
|
|
|
signal_callstack.ss_sp = (char *)signal_callstack_seg->start;
|
|
|
|
signal_callstack.ss_size = signal_callstack_seg->size;
|
|
|
|
signal_callstack.ss_flags = 0;
|
|
|
|
|
|
|
|
if(sigaltstack(&signal_callstack,(stack_t *)NULL) < 0)
|
|
|
|
fatal_error("sigaltstack() failed",0);
|
|
|
|
|
2009-05-02 05:04:19 -04:00
|
|
|
struct sigaction memory_sigaction;
|
2011-10-19 18:39:44 -04:00
|
|
|
struct sigaction synchronous_sigaction;
|
2011-10-21 00:00:25 -04:00
|
|
|
struct sigaction enqueue_sigaction;
|
|
|
|
struct sigaction fep_sigaction;
|
|
|
|
struct sigaction sample_sigaction;
|
2009-09-06 09:44:25 -04:00
|
|
|
struct sigaction fpe_sigaction;
|
2009-05-02 05:04:19 -04:00
|
|
|
struct sigaction ignore_sigaction;
|
|
|
|
|
2011-10-21 00:00:25 -04:00
|
|
|
init_sigaction_with_handler(&memory_sigaction, memory_signal_handler);
|
2009-05-02 05:04:19 -04:00
|
|
|
sigaction_safe(SIGBUS,&memory_sigaction,NULL);
|
|
|
|
sigaction_safe(SIGSEGV,&memory_sigaction,NULL);
|
2011-05-20 18:11:50 -04:00
|
|
|
sigaction_safe(SIGTRAP,&memory_sigaction,NULL);
|
2009-05-02 05:04:19 -04:00
|
|
|
|
2011-10-21 00:00:25 -04:00
|
|
|
init_sigaction_with_handler(&fpe_sigaction, fpe_signal_handler);
|
2009-09-06 09:44:25 -04:00
|
|
|
sigaction_safe(SIGFPE,&fpe_sigaction,NULL);
|
|
|
|
|
2011-10-21 00:00:25 -04:00
|
|
|
init_sigaction_with_handler(&synchronous_sigaction, synchronous_signal_handler);
|
2011-10-19 18:39:44 -04:00
|
|
|
sigaction_safe(SIGILL,&synchronous_sigaction,NULL);
|
|
|
|
sigaction_safe(SIGABRT,&synchronous_sigaction,NULL);
|
|
|
|
|
2011-10-21 00:00:25 -04:00
|
|
|
init_sigaction_with_handler(&enqueue_sigaction, enqueue_signal_handler);
|
|
|
|
sigaction_safe(SIGUSR1,&enqueue_sigaction,NULL);
|
|
|
|
sigaction_safe(SIGUSR2,&enqueue_sigaction,NULL);
|
|
|
|
sigaction_safe(SIGWINCH,&enqueue_sigaction,NULL);
|
|
|
|
#ifdef SIGINFO
|
|
|
|
sigaction_safe(SIGINFO,&enqueue_sigaction,NULL);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
init_sigaction_with_handler(&fep_sigaction, fep_signal_handler);
|
|
|
|
sigaction_safe(SIGQUIT,&fep_sigaction,NULL);
|
|
|
|
sigaction_safe(SIGINT,&fep_sigaction,NULL);
|
|
|
|
|
|
|
|
init_sigaction_with_handler(&sample_sigaction, sample_signal_handler);
|
|
|
|
sigaction_safe(SIGALRM,&sample_sigaction,NULL);
|
2009-05-02 05:04:19 -04:00
|
|
|
|
2010-09-03 01:11:45 -04:00
|
|
|
/* We don't use SA_IGN here because then the ignore action is inherited
|
|
|
|
by subprocesses, which we don't want. There is a unit test in
|
|
|
|
io.launcher.unix for this. */
|
2011-10-21 00:00:25 -04:00
|
|
|
init_sigaction_with_handler(&ignore_sigaction, ignore_signal_handler);
|
2009-05-02 05:04:19 -04:00
|
|
|
sigaction_safe(SIGPIPE,&ignore_sigaction,NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* On Unix, shared fds such as stdin cannot be set to non-blocking mode
|
|
|
|
(http://homepages.tesco.net/J.deBoynePollard/FGA/dont-set-shared-file-descriptors-to-non-blocking-mode.html)
|
|
|
|
so we kludge around this by spawning a thread, which waits on a control pipe
|
|
|
|
for a signal, upon receiving this signal it reads one block of data from stdin
|
|
|
|
and writes it to a data pipe. Upon completion, it writes a 4-byte integer to
|
|
|
|
the size pipe, indicating how much data was written to the data pipe.
|
|
|
|
|
|
|
|
The read end of the size pipe can be set to non-blocking. */
|
|
|
|
extern "C" {
|
|
|
|
int stdin_read;
|
|
|
|
int stdin_write;
|
|
|
|
|
|
|
|
int control_read;
|
|
|
|
int control_write;
|
|
|
|
|
|
|
|
int size_read;
|
|
|
|
int size_write;
|
|
|
|
}
|
|
|
|
|
|
|
|
void safe_close(int fd)
|
|
|
|
{
|
|
|
|
if(close(fd) < 0)
|
2009-08-25 03:20:58 -04:00
|
|
|
fatal_error("error closing fd",errno);
|
2009-05-02 05:04:19 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
bool check_write(int fd, void *data, ssize_t size)
|
|
|
|
{
|
|
|
|
if(write(fd,data,size) == size)
|
|
|
|
return true;
|
|
|
|
else
|
|
|
|
{
|
|
|
|
if(errno == EINTR)
|
|
|
|
return check_write(fd,data,size);
|
|
|
|
else
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void safe_write(int fd, void *data, ssize_t size)
|
|
|
|
{
|
|
|
|
if(!check_write(fd,data,size))
|
2009-08-25 03:20:58 -04:00
|
|
|
fatal_error("error writing fd",errno);
|
2009-05-02 05:04:19 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
bool safe_read(int fd, void *data, ssize_t size)
|
|
|
|
{
|
|
|
|
ssize_t bytes = read(fd,data,size);
|
|
|
|
if(bytes < 0)
|
|
|
|
{
|
|
|
|
if(errno == EINTR)
|
|
|
|
return safe_read(fd,data,size);
|
|
|
|
else
|
|
|
|
{
|
2009-08-25 03:20:58 -04:00
|
|
|
fatal_error("error reading fd",errno);
|
2009-05-02 05:04:19 -04:00
|
|
|
return false;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
return (bytes == size);
|
|
|
|
}
|
|
|
|
|
|
|
|
void *stdin_loop(void *arg)
|
|
|
|
{
|
|
|
|
unsigned char buf[4096];
|
|
|
|
bool loop_running = true;
|
|
|
|
|
2011-10-19 21:55:31 -04:00
|
|
|
sigset_t mask;
|
|
|
|
sigfillset(&mask);
|
|
|
|
pthread_sigmask(SIG_BLOCK, &mask, NULL);
|
|
|
|
|
2009-05-02 05:04:19 -04:00
|
|
|
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 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
|
|
|
}
|
|
|
|
|
2011-11-07 15:51:49 -05:00
|
|
|
void safepoint_state::report_signal(int fd) volatile
|
|
|
|
{
|
|
|
|
int signal = (int)atomic::load(&queued_signal);
|
|
|
|
if (signal != 0)
|
|
|
|
{
|
|
|
|
safe_write(fd, &signal, sizeof(int));
|
|
|
|
atomic::store(&queued_signal, 0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-05-04 02:46:13 -04:00
|
|
|
}
|