namespace factor {
+bool set_memory_locked(cell base, cell size, bool locked) {
+ int prot = locked ? PROT_NONE : PROT_READ | PROT_WRITE;
+ int status = mprotect((char*)base, size, prot);
+ return status != -1;
+}
+
THREADHANDLE start_thread(void* (*start_routine)(void*), void* args) {
pthread_attr_t attr;
pthread_t thread;
dll->handle = dlopen(alien_offset(dll->path), RTLD_LAZY | RTLD_GLOBAL);
}
-void* factor_vm::ffi_dlsym_raw(dll* dll, symbol_char* symbol) {
- return dlsym(dll ? dll->handle : null_dll, symbol);
+cell factor_vm::ffi_dlsym_raw(dll* dll, symbol_char* symbol) {
+ return (cell)dlsym(dll ? dll->handle : null_dll, symbol);
}
-void* factor_vm::ffi_dlsym(dll* dll, symbol_char* symbol) {
+cell factor_vm::ffi_dlsym(dll* dll, symbol_char* symbol) {
return FUNCTION_CODE_POINTER(ffi_dlsym_raw(dll, symbol));
}
-#ifdef FACTOR_PPC
-void* factor_vm::ffi_dlsym_toc(dll* dll, symbol_char* symbol) {
- return FUNCTION_TOC_POINTER(ffi_dlsym_raw(dll, symbol));
-}
-#endif
-
void factor_vm::ffi_dlclose(dll* dll) {
if (dlclose(dll->handle))
general_error(ERROR_FFI, false_object, false_object);
ctx->push(tag_boolean(stat(path, &sb) >= 0));
}
-void factor_vm::move_file(const vm_char* path1, const vm_char* path2) {
+bool move_file(const vm_char* path1, const vm_char* path2) {
int ret = 0;
do {
ret = rename((path1), (path2));
} while (ret < 0 && errno == EINTR);
- if (ret < 0)
- general_error(ERROR_IO, tag_fixnum(errno), false_object);
-}
-
-void check_ENOMEM(const char* msg) {
- if(errno == ENOMEM)
- out_of_memory(msg);
+ return ret == 0;
}
segment::segment(cell size_, bool executable_p) {
int prot;
if (executable_p)
- prot = (PROT_READ | PROT_WRITE | PROT_EXEC);
+ prot = PROT_READ | PROT_WRITE | PROT_EXEC;
else
- prot = (PROT_READ | PROT_WRITE);
-
- char* array = (char*)mmap(NULL, pagesize + size + pagesize, prot,
+ prot = PROT_READ | PROT_WRITE;
+
+ cell alloc_size = 2 * pagesize + size;
+#if defined(__APPLE__) && defined(FACTOR_ARM64) // FIXME: could be in header file
+ char* array = (char*)mmap(NULL, alloc_size, prot,
+ MAP_ANON | MAP_PRIVATE | MAP_JIT, -1, 0);
+#else
+ char* array = (char*)mmap(NULL, alloc_size, prot,
MAP_ANON | MAP_PRIVATE, -1, 0);
+#endif
- if (array == (char*)- 1)
- out_of_memory("mmap");
-
- if (mprotect(array, pagesize, PROT_NONE) == -1) {
- check_ENOMEM("mprotect low");
- fatal_error("Cannot protect low guard page", (cell)array);
- }
-
- if (mprotect(array + pagesize + size, pagesize, PROT_NONE) == -1) {
- check_ENOMEM("mprotect high");
- fatal_error("Cannot protect high guard page", (cell)array);
- }
+ if (array == (char*)-1)
+ fatal_error("Out of memory in mmap", alloc_size);
start = (cell)(array + pagesize);
end = start + size;
+
+ set_border_locked(true);
}
segment::~segment() {
int pagesize = getpagesize();
- int retval = munmap((void*)(start - pagesize), pagesize + size + pagesize);
+ int retval = munmap((void*)(start - pagesize), 2 * pagesize + size);
if (retval)
fatal_error("Segment deallocation failed", 0);
}
-void code_heap::guard_safepoint() {
- if (mprotect(safepoint_page, getpagesize(), PROT_NONE) == -1)
- fatal_error("Cannot protect safepoint guard page", (cell)safepoint_page);
-}
-
-void code_heap::unguard_safepoint() {
- if (mprotect(safepoint_page, getpagesize(), PROT_WRITE) == -1)
- fatal_error("Cannot unprotect safepoint guard page", (cell)safepoint_page);
-}
-
-void factor_vm::dispatch_signal(void* uap, void(handler)()) {
- dispatch_signal_handler((cell*)&UAP_STACK_POINTER(uap),
- (cell*)&UAP_PROGRAM_COUNTER(uap),
- (cell)FUNCTION_CODE_POINTER(handler));
- UAP_SET_TOC_POINTER(uap, (cell)FUNCTION_TOC_POINTER(handler));
-}
-
void factor_vm::start_sampling_profiler_timer() {
struct itimerval timer;
memset((void*)&timer, 0, sizeof(struct itimerval));
setitimer(ITIMER_REAL, &timer, NULL);
}
+void factor_vm::dispatch_signal(void* uap, void(handler)()) {
+ dispatch_signal_handler((cell*)&UAP_STACK_POINTER(uap),
+ (cell*)&UAP_PROGRAM_COUNTER(uap),
+ (cell)FUNCTION_CODE_POINTER(handler));
+}
+
void memory_signal_handler(int signal, siginfo_t* siginfo, void* uap) {
+ (void) signal;
+ cell fault_addr = (cell)siginfo->si_addr;
+ cell fault_pc = (cell)UAP_PROGRAM_COUNTER(uap);
factor_vm* vm = current_vm();
- vm->verify_memory_protection_error((cell)siginfo->si_addr);
- vm->signal_fault_addr = (cell)siginfo->si_addr;
- vm->signal_fault_pc = (cell)UAP_PROGRAM_COUNTER(uap);
+ vm->set_memory_protection_error(fault_addr, fault_pc);
vm->dispatch_signal(uap, factor::memory_signal_handler_impl);
}
void synchronous_signal_handler(int signal, siginfo_t* siginfo, void* uap) {
+ (void) siginfo;
if (factor_vm::fatal_erroring_p)
return;
factor_vm* vm = current_vm_p();
- if (vm) {
- vm->signal_number = signal;
- vm->dispatch_signal(uap, factor::synchronous_signal_handler_impl);
- } else
+ if (!vm)
fatal_error("Foreign thread received signal", signal);
+ vm->signal_number = signal;
+ vm->dispatch_signal(uap, factor::synchronous_signal_handler_impl);
}
void safe_write_nonblock(int fd, void* data, ssize_t size);
}
void enqueue_signal_handler(int signal, siginfo_t* siginfo, void* uap) {
+ (void) siginfo;
+ (void) uap;
if (factor_vm::fatal_erroring_p)
return;
}
void fep_signal_handler(int signal, siginfo_t* siginfo, void* uap) {
+ (void) siginfo;
+ (void) uap;
if (factor_vm::fatal_erroring_p)
return;
factor_vm* vm = current_vm_p();
if (vm) {
- vm->safepoint.enqueue_fep(vm);
+ vm->enqueue_fep();
enqueue_signal(vm, signal);
} else
fatal_error("Foreign thread received signal", signal);
}
void sample_signal_handler(int signal, siginfo_t* siginfo, void* uap) {
+ (void) siginfo;
factor_vm* vm = current_vm_p();
bool foreign_thread = false;
if (vm == NULL) {
vm = thread_vms.begin()->second;
}
if (atomic::load(&vm->sampling_profiler_p))
- vm->safepoint.enqueue_samples(vm, 1, (cell)UAP_PROGRAM_COUNTER(uap),
- foreign_thread);
+ vm->enqueue_samples(1, (cell)UAP_PROGRAM_COUNTER(uap), foreign_thread);
else if (!foreign_thread)
enqueue_signal(vm, signal);
}
-void ignore_signal_handler(int signal, siginfo_t* siginfo, void* uap) {}
+void ignore_signal_handler(int signal, siginfo_t* siginfo, void* uap) {
+ (void) signal;
+ (void) siginfo;
+ (void) uap;
+}
void fpe_signal_handler(int signal, siginfo_t* siginfo, void* uap) {
factor_vm* vm = current_vm();
sigaction_safe(SIGALRM, &sample_sigaction, NULL);
}
- /* 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. */
+ // 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.
{
struct sigaction ignore_sigaction;
init_sigaction_with_handler(&ignore_sigaction, ignore_signal_handler);
sigaction_safe(SIGPIPE, &ignore_sigaction, NULL);
- /* We send SIGUSR2 to the stdin_loop thread to interrupt it on FEP */
+ // We send SIGUSR2 to the stdin_loop thread to interrupt it on FEP
sigaction_safe(SIGUSR2, &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.
+// 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. */
+// The read end of the size pipe can be set to non-blocking.
extern "C" {
int stdin_read;
int stdin_write;
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;
- }
+ if (errno == EINTR)
+ return check_write(fd, data, size);
+ return false;
}
void safe_write(int fd, void* data, ssize_t size) {
}
void* stdin_loop(void* arg) {
+ (void) arg;
unsigned char buf[4096];
bool loop_running = true;
fatal_error("stdin_loop: bad data on control fd", buf[0]);
for (;;) {
- /* If we fep, the parent thread will grab stdin_mutex and send us
- SIGUSR2 to interrupt the read() call. */
+ // If we fep, the parent thread will grab stdin_mutex and send us
+ // SIGUSR2 to interrupt the read() call.
pthread_mutex_lock(&stdin_mutex);
pthread_mutex_unlock(&stdin_mutex);
ssize_t bytes = read(0, buf, sizeof(buf));
return NULL;
}
-void factor_vm::open_console() {
+void open_console() {
FACTOR_ASSERT(!stdin_thread_initialized_p);
safe_pipe(&control_read, &control_write);
safe_pipe(&size_read, &size_write);
pthread_mutex_init(&stdin_mutex, NULL);
}
-/* This method is used to kill the stdin_loop before exiting from factor.
- A Nvidia driver bug on Linux is the reason this has to be done, see:
- http://www.nvnews.net/vbulletin/showthread.php?t=164619 */
-void factor_vm::close_console() {
+// This method is used to kill the stdin_loop before exiting from factor.
+// An Nvidia driver bug on Linux is the reason this has to be done, see:
+// http://www.nvnews.net/vbulletin/showthread.php?t=164619
+void close_console() {
if (stdin_thread_initialized_p) {
pthread_cancel(stdin_thread);
pthread_join(stdin_thread, 0);
}
}
-void factor_vm::lock_console() {
+void lock_console() {
FACTOR_ASSERT(stdin_thread_initialized_p);
- /* Lock the stdin_mutex and send the stdin_loop thread a signal to interrupt
- any read() it has in progress. When the stdin loop iterates again, it will
- try to lock the same mutex and wait until unlock_console() is called. */
+ // Lock the stdin_mutex and send the stdin_loop thread a signal to interrupt
+ // any read() it has in progress. When the stdin loop iterates again, it will
+ // try to lock the same mutex and wait until unlock_console() is called.
pthread_mutex_lock(&stdin_mutex);
pthread_kill(stdin_thread, SIGUSR2);
}
-void factor_vm::unlock_console() {
+void unlock_console() {
FACTOR_ASSERT(stdin_thread_initialized_p);
pthread_mutex_unlock(&stdin_mutex);
}
-void factor_vm::ignore_ctrl_c() {
+void ignore_ctrl_c() {
sig_t ret;
do {
ret = signal(SIGINT, SIG_DFL);
} while (ret == SIG_ERR && errno == EINTR);
}
-void factor_vm::handle_ctrl_c() {
+void handle_ctrl_c() {
struct sigaction fep_sigaction;
init_sigaction_with_handler(&fep_sigaction, fep_signal_handler);
sigaction_safe(SIGINT, &fep_sigaction, NULL);
}
+void factor_vm::primitive_disable_ctrl_break() {
+ stop_on_ctrl_break = false;
+}
+
+void factor_vm::primitive_enable_ctrl_break() {
+ stop_on_ctrl_break = true;
+}
+
void abort() {
sig_t ret;
do {
ret = signal(SIGABRT, SIG_DFL);
} while (ret == SIG_ERR && errno == EINTR);
- factor_vm::close_console();
+ close_console();
::abort();
}
projects / factor.git / blobdiff