HMODULE hFactorDll;
+bool set_memory_locked(cell base, cell size, bool locked) {
+ int prot = locked ? PAGE_NOACCESS : PAGE_READWRITE;
+ DWORD ignore;
+ int status = VirtualProtect((char*)base, size, prot, &ignore);
+ return status != 0;
+}
+
void factor_vm::init_ffi() {
hFactorDll = GetModuleHandle(NULL);
if (!hFactorDll)
dll->handle = LoadLibraryEx((WCHAR*)alien_offset(dll->path), NULL, 0);
}
-void* factor_vm::ffi_dlsym(dll* dll, symbol_char* symbol) {
- return (void*)GetProcAddress(dll ? (HMODULE) dll->handle : hFactorDll,
- symbol);
+cell factor_vm::ffi_dlsym(dll* dll, symbol_char* symbol) {
+ return (cell)GetProcAddress(dll ? (HMODULE) dll->handle : hFactorDll,
+ symbol);
}
-void* factor_vm::ffi_dlsym_raw(dll* dll, symbol_char* symbol) {
+cell factor_vm::ffi_dlsym_raw(dll* dll, symbol_char* symbol) {
return ffi_dlsym(dll, symbol);
}
BOOL factor_vm::windows_stat(vm_char* path) {
BY_HANDLE_FILE_INFORMATION bhfi;
- HANDLE h = CreateFileW(path, GENERIC_READ, FILE_SHARE_READ, NULL,
+ HANDLE h = CreateFileW(path, FILE_READ_ATTRIBUTES, 0, NULL,
OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (h == INVALID_HANDLE_VALUE) {
// FindFirstFile is the only call that can stat c:\pagefile.sys
WIN32_FIND_DATA st;
- HANDLE h;
-
- if (INVALID_HANDLE_VALUE == (h = FindFirstFile(path, &st)))
+ h = FindFirstFile(path, &st);
+ if (h == INVALID_HANDLE_VALUE)
return false;
FindClose(h);
return true;
return ret;
}
-void factor_vm::windows_image_path(vm_char* full_path, vm_char* temp_path,
- unsigned int length) {
- wcsncpy(temp_path, full_path, length - 1);
- size_t full_path_len = wcslen(full_path);
- if (full_path_len < length - 1)
- wcsncat(temp_path, L".image", length - full_path_len - 1);
- temp_path[length - 1] = 0;
-}
-
-/* You must free() this yourself. */
+// You must free() this yourself.
const vm_char* factor_vm::default_image_path() {
vm_char full_path[MAX_UNICODE_PATH];
vm_char* ptr;
return safe_strdup(temp_path);
}
-/* You must free() this yourself. */
+// You must free() this yourself.
const vm_char* factor_vm::vm_executable_path() {
vm_char full_path[MAX_UNICODE_PATH];
if (!GetModuleFileName(NULL, full_path, MAX_UNICODE_PATH))
size = size_;
char* mem;
- DWORD ignore;
-
+ cell alloc_size = getpagesize() * 2 + size;
if ((mem = (char*)VirtualAlloc(
- NULL, getpagesize() * 2 + size, MEM_COMMIT,
+ NULL, alloc_size, MEM_COMMIT,
executable_p ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE)) ==
- 0)
- out_of_memory("VirtualAlloc");
-
- if (!VirtualProtect(mem, getpagesize(), PAGE_NOACCESS, &ignore))
- fatal_error("Cannot allocate low guard page", (cell)mem);
-
- if (!VirtualProtect(mem + size + getpagesize(), getpagesize(), PAGE_NOACCESS,
- &ignore))
- fatal_error("Cannot allocate high guard page", (cell)mem);
+ 0) {
+ fatal_error("Out of memory in VirtualAlloc", alloc_size);
+ }
start = (cell)mem + getpagesize();
end = start + size;
+
+ set_border_locked(true);
}
segment::~segment() {
return g_pagesize;
}
-void code_heap::guard_safepoint() {
- DWORD ignore;
- if (!VirtualProtect(safepoint_page, getpagesize(), PAGE_NOACCESS, &ignore))
- fatal_error("Cannot protect safepoint guard page", (cell)safepoint_page);
-}
-void code_heap::unguard_safepoint() {
- DWORD ignore;
- if (!VirtualProtect(safepoint_page, getpagesize(), PAGE_READWRITE, &ignore))
- fatal_error("Cannot unprotect safepoint guard page", (cell)safepoint_page);
-}
-
-void factor_vm::move_file(const vm_char* path1, const vm_char* path2) {
- if (MoveFileEx((path1), (path2), MOVEFILE_REPLACE_EXISTING) == false)
- general_error(ERROR_IO, tag_fixnum(GetLastError()), false_object);
+bool move_file(const vm_char* path1, const vm_char* path2) {
+ // MoveFileEx returns FALSE on fail.
+ BOOL val = MoveFileEx((path1), (path2), MOVEFILE_REPLACE_EXISTING);
+ if (val == FALSE) {
+ // MoveFileEx doesn't set errno, which primitive_save_image()
+ // reads the error code from. Instead of converting from
+ // GetLastError() to errno values, we ust set it to the generic
+ // EIO value.
+ errno = EIO;
+ }
+ return val == TRUE;
}
void factor_vm::init_signals() {}
static uint32_t hi = 0;
static uint32_t lo = 0;
+ // Note: on older systems QueryPerformanceCounter may be unreliable
+ // until you add /usepmtimer to Boot.ini. I had an issue where two
+ // nano_count calls would show a difference of about 1 second,
+ // while actually about 80 seconds have passed. The /usepmtimer
+ // switch cured the issue on that PC (WinXP Pro SP3 32-bit).
+ // See also http://www.virtualdub.org/blog/pivot/entry.php?id=106
LARGE_INTEGER count;
BOOL ret = QueryPerformanceCounter(&count);
if (ret == 0)
#ifdef FACTOR_64
hi = count.HighPart;
#else
- /* On VirtualBox, QueryPerformanceCounter does not increment
- the high part every time the low part overflows. Workaround. */
+ // On VirtualBox, QueryPerformanceCounter does not increment
+ // the high part every time the low part overflows. Workaround.
if (lo > count.LowPart)
hi++;
#endif
void sleep_nanos(uint64_t nsec) { Sleep((DWORD)(nsec / 1000000)); }
+#ifndef EXCEPTION_DISPOSITION
typedef enum _EXCEPTION_DISPOSITION {
ExceptionContinueExecution = 0,
ExceptionContinueSearch = 1,
ExceptionNestedException = 2,
ExceptionCollidedUnwind = 3
} EXCEPTION_DISPOSITION;
+#endif
LONG factor_vm::exception_handler(PEXCEPTION_RECORD e, void* frame, PCONTEXT c,
void* dispatch) {
+ (void)frame;
+ (void)dispatch;
switch (e->ExceptionCode) {
case EXCEPTION_ACCESS_VIOLATION:
- signal_fault_addr = e->ExceptionInformation[1];
- verify_memory_protection_error(signal_fault_addr);
+ set_memory_protection_error(e->ExceptionInformation[1], c->EIP);
dispatch_signal_handler((cell*)&c->ESP, (cell*)&c->EIP,
(cell)factor::memory_signal_handler_impl);
break;
#else
signal_fpu_status = fpu_status(X87SW(c) | MXCSR(c));
- /* This seems to have no effect */
+ // This seems to have no effect
X87SW(c) = 0;
#endif
MXCSR(c) &= 0xffffffc0;
(cell)factor::synchronous_signal_handler_impl);
break;
}
-
return ExceptionContinueExecution;
}
VM_C_API LONG exception_handler(PEXCEPTION_RECORD e, void* frame, PCONTEXT c,
void* dispatch) {
- if (factor_vm::fatal_erroring_p)
- return ExceptionContinueSearch;
-
factor_vm* vm = current_vm_p();
- if (vm)
- return vm->exception_handler(e, frame, c, dispatch);
- else
+ if (factor_vm::fatal_erroring_p || !vm)
return ExceptionContinueSearch;
+ return vm->exception_handler(e, frame, c, dispatch);
}
-/* On Unix SIGINT (ctrl-c) automatically interrupts blocking io system
- calls. It doesn't on Windows, so we need to manually send some
- cancellation requests to unblock the thread. */
-VOID CALLBACK dummy_cb (ULONG_PTR dwParam) { }
+// On Unix SIGINT (ctrl-c) automatically interrupts blocking io system
+// calls. It doesn't on Windows, so we need to manually send some
+// cancellation requests to unblock the thread.
+VOID CALLBACK dummy_cb(ULONG_PTR dwParam) { (void)dwParam; }
// CancelSynchronousIo is not in Windows XP
#if _WIN32_WINNT >= 0x0600
static void wake_up_thread(HANDLE thread) {
if (!CancelSynchronousIo(thread)) {
DWORD err = GetLastError();
- /* CancelSynchronousIo() didn't find anything to cancel, let's try
- with QueueUserAPC() instead. */
+ // CancelSynchronousIo() didn't find anything to cancel, let's try
+ // with QueueUserAPC() instead.
if (err == ERROR_NOT_FOUND) {
if (!QueueUserAPC(&dummy_cb, thread, NULL)) {
fatal_error("QueueUserAPC() failed", GetLastError());
}
}
#else
-static void wake_up_thread(HANDLE thread) {}
+static void wake_up_thread(HANDLE thread) { (void)thread; }
#endif
static BOOL WINAPI ctrl_handler(DWORD dwCtrlType) {
switch (dwCtrlType) {
case CTRL_C_EVENT: {
- /* The CtrlHandler runs in its own thread without stopping the main
- thread. Since in practice nobody uses the multi-VM stuff yet, we just
- grab the first VM we can get. This will not be a good idea when we
- actually support native threads. */
+ // The CtrlHandler runs in its own thread without stopping the main
+ // thread. Since in practice nobody uses the multi-VM stuff yet, we just
+ // grab the first VM we can get. This will not be a good idea when we
+ // actually support native threads.
FACTOR_ASSERT(thread_vms.size() == 1);
factor_vm* vm = thread_vms.begin()->second;
- vm->safepoint.enqueue_fep(vm);
+ vm->enqueue_fep();
- /* Before leaving the ctrl_handler, try and wake up the main
- thread. */
+ // Before leaving the ctrl_handler, try and wake up the main thread.
wake_up_thread(factor::boot_thread);
return TRUE;
}
}
}
-void factor_vm::open_console() { handle_ctrl_c(); }
+void open_console() { handle_ctrl_c(); }
-void factor_vm::ignore_ctrl_c() {
+void ignore_ctrl_c() {
SetConsoleCtrlHandler(factor::ctrl_handler, FALSE);
}
-void factor_vm::handle_ctrl_c() {
+void handle_ctrl_c() {
SetConsoleCtrlHandler(factor::ctrl_handler, TRUE);
}
-void factor_vm::lock_console() {}
+const int ctrl_break_sleep = 10; /* msec */
+
+static DWORD WINAPI ctrl_break_thread_proc(LPVOID parent_vm) {
+ bool ctrl_break_handled = false;
+ factor_vm* vm = static_cast<factor_vm*>(parent_vm);
+ while (vm->stop_on_ctrl_break) {
+ if (GetAsyncKeyState(VK_CANCEL) >= 0) { /* Ctrl-Break is released. */
+ ctrl_break_handled = false; /* Wait for the next press. */
+ } else if (!ctrl_break_handled) {
+ /* Check if the VM thread has the same Id as the thread Id of the
+ currently active window. Note that thread Id is not a handle. */
+ DWORD fg_thd_id = GetWindowThreadProcessId(GetForegroundWindow(), NULL);
+ if ((fg_thd_id == vm->thread_id) && !vm->fep_p) {
+ vm->enqueue_fep();
+ ctrl_break_handled = true;
+ }
+ }
+ Sleep(ctrl_break_sleep);
+ }
+ return 0;
+}
-void factor_vm::unlock_console() {}
+void factor_vm::primitive_disable_ctrl_break() {
+ stop_on_ctrl_break = false;
+ if (ctrl_break_thread != NULL) {
+ DWORD wait_result = WaitForSingleObject(ctrl_break_thread,
+ 2 * ctrl_break_sleep);
+ if (wait_result != WAIT_OBJECT_0)
+ TerminateThread(ctrl_break_thread, 0);
+ CloseHandle(ctrl_break_thread);
+ ctrl_break_thread = NULL;
+ }
+}
+
+void factor_vm::primitive_enable_ctrl_break() {
+ stop_on_ctrl_break = true;
+ if (ctrl_break_thread == NULL) {
+ DisableProcessWindowsGhosting();
+ ctrl_break_thread = CreateThread(NULL, 0, factor::ctrl_break_thread_proc,
+ static_cast<LPVOID>(this), 0, NULL);
+ SetThreadPriority(ctrl_break_thread, THREAD_PRIORITY_ABOVE_NORMAL);
+ }
+}
-void factor_vm::close_console() {}
+void lock_console() {}
+
+void unlock_console() {}
+
+void close_console() {}
+
+cell get_thread_pc(THREADHANDLE th) {
+ DWORD suscount = SuspendThread(th);
+ FACTOR_ASSERT(suscount == 0);
+
+ CONTEXT context;
+ memset((void*)&context, 0, sizeof(CONTEXT));
+ context.ContextFlags = CONTEXT_CONTROL;
+ BOOL context_ok = GetThreadContext(th, &context);
+ FACTOR_ASSERT(context_ok);
+
+ suscount = ResumeThread(th);
+ FACTOR_ASSERT(suscount == 1);
+ return context.EIP;
+}
void factor_vm::sampler_thread_loop() {
LARGE_INTEGER counter, new_counter, units_per_second;
++samples;
counter.QuadPart += units_per_second.QuadPart;
}
+ if (samples == 0)
+ continue;
- if (samples > 0) {
- DWORD suscount = SuspendThread(thread);
- FACTOR_ASSERT(suscount == 0);
-
- CONTEXT context;
- memset((void*)&context, 0, sizeof(CONTEXT));
- context.ContextFlags = CONTEXT_CONTROL;
- BOOL context_ok = GetThreadContext(thread, &context);
- FACTOR_ASSERT(context_ok);
-
- suscount = ResumeThread(thread);
- FACTOR_ASSERT(suscount == 1);
-
- safepoint.enqueue_samples(this, samples, context.EIP, false);
- }
+ cell pc = get_thread_pc(thread);
+ enqueue_samples(samples, pc, false);
}
}
WaitForSingleObject(sampler_thread, 3000 * (DWORD) samples_per_second);
if (wait_result != WAIT_OBJECT_0)
TerminateThread(sampler_thread, 0);
+ CloseHandle(sampler_thread);
sampler_thread = NULL;
}
projects / factor.git / blobdiff