#include "master.hpp"
-namespace factor
-{
+namespace factor {
HMODULE hFactorDll;
-void factor_vm::init_ffi()
-{
- hFactorDll = GetModuleHandle(FACTOR_DLL);
- if(!hFactorDll)
- fatal_error("GetModuleHandle() failed", 0);
+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::ffi_dlopen(dll *dll)
-{
- dll->handle = LoadLibraryEx((WCHAR *)alien_offset(dll->path), NULL, 0);
+void factor_vm::init_ffi() {
+ hFactorDll = GetModuleHandle(NULL);
+ if (!hFactorDll)
+ fatal_error("GetModuleHandle() failed", 0);
}
-void *factor_vm::ffi_dlsym(dll *dll, symbol_char *symbol)
-{
- return (void *)GetProcAddress(dll ? (HMODULE)dll->handle : hFactorDll, symbol);
+void factor_vm::ffi_dlopen(dll* dll) {
+ dll->handle = LoadLibraryEx((WCHAR*)alien_offset(dll->path), NULL, 0);
}
-void *factor_vm::ffi_dlsym_raw(dll *dll, symbol_char *symbol)
-{
- return ffi_dlsym(dll, symbol);
+cell factor_vm::ffi_dlsym(dll* dll, symbol_char* symbol) {
+ return (cell)GetProcAddress(dll ? (HMODULE) dll->handle : hFactorDll,
+ symbol);
}
-void factor_vm::ffi_dlclose(dll *dll)
-{
- FreeLibrary((HMODULE)dll->handle);
- dll->handle = NULL;
+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,
- 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)))
- return false;
- FindClose(h);
- return true;
- }
- BOOL ret = GetFileInformationByHandle(h, &bhfi);
- CloseHandle(h);
- return ret;
+void factor_vm::ffi_dlclose(dll* dll) {
+ FreeLibrary((HMODULE) dll->handle);
+ dll->handle = NULL;
}
-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;
+BOOL factor_vm::windows_stat(vm_char* path) {
+ BY_HANDLE_FILE_INFORMATION bhfi;
+ 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;
+ h = FindFirstFile(path, &st);
+ if (h == INVALID_HANDLE_VALUE)
+ return false;
+ FindClose(h);
+ return true;
+ }
+ BOOL ret = GetFileInformationByHandle(h, &bhfi);
+ CloseHandle(h);
+ return ret;
}
-/* You must free() this yourself. */
-const vm_char *factor_vm::default_image_path()
-{
- vm_char full_path[MAX_UNICODE_PATH];
- vm_char *ptr;
- vm_char temp_path[MAX_UNICODE_PATH];
+// You must free() this yourself.
+const vm_char* factor_vm::default_image_path() {
+ vm_char full_path[MAX_UNICODE_PATH];
+ vm_char* ptr;
+ vm_char temp_path[MAX_UNICODE_PATH];
- if(!GetModuleFileName(NULL, full_path, MAX_UNICODE_PATH))
- fatal_error("GetModuleFileName() failed", 0);
+ if (!GetModuleFileName(NULL, full_path, MAX_UNICODE_PATH))
+ fatal_error("GetModuleFileName() failed", 0);
- if((ptr = wcsrchr(full_path, '.')))
- *ptr = 0;
+ if ((ptr = wcsrchr(full_path, '.')))
+ *ptr = 0;
- wcsncpy(temp_path, full_path, MAX_UNICODE_PATH - 1);
- size_t full_path_len = wcslen(full_path);
- if (full_path_len < MAX_UNICODE_PATH - 1)
- wcsncat(temp_path, L".image", MAX_UNICODE_PATH - full_path_len - 1);
- temp_path[MAX_UNICODE_PATH - 1] = 0;
+ wcsncpy(temp_path, full_path, MAX_UNICODE_PATH - 1);
+ size_t full_path_len = wcslen(full_path);
+ if (full_path_len < MAX_UNICODE_PATH - 1)
+ wcsncat(temp_path, L".image", MAX_UNICODE_PATH - full_path_len - 1);
+ temp_path[MAX_UNICODE_PATH - 1] = 0;
- return safe_strdup(temp_path);
+ return safe_strdup(temp_path);
}
-/* 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))
- fatal_error("GetModuleFileName() failed", 0);
- return safe_strdup(full_path);
+// 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))
+ fatal_error("GetModuleFileName() failed", 0);
+ return safe_strdup(full_path);
}
-void factor_vm::primitive_existsp()
-{
- vm_char *path = untag_check<byte_array>(ctx->pop())->data<vm_char>();
- ctx->push(tag_boolean(windows_stat(path)));
+void factor_vm::primitive_existsp() {
+ vm_char* path = untag_check<byte_array>(ctx->pop())->data<vm_char>();
+ ctx->push(tag_boolean(windows_stat(path)));
}
-segment::segment(cell size_, bool executable_p)
-{
- size = size_;
+segment::segment(cell size_, bool executable_p) {
+ size = size_;
- char *mem;
- DWORD ignore;
+ char* mem;
+ cell alloc_size = getpagesize() * 2 + size;
+ if ((mem = (char*)VirtualAlloc(
+ NULL, alloc_size, MEM_COMMIT,
+ executable_p ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE)) ==
+ 0) {
+ fatal_error("Out of memory in VirtualAlloc", alloc_size);
+ }
- if((mem = (char *)VirtualAlloc(NULL, getpagesize() * 2 + size,
- MEM_COMMIT, executable_p ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE)) == 0)
- out_of_memory();
+ start = (cell)mem + getpagesize();
+ end = start + size;
- 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);
-
- start = (cell)mem + getpagesize();
- end = start + size;
+ set_border_locked(true);
}
-segment::~segment()
-{
- SYSTEM_INFO si;
- GetSystemInfo(&si);
- if(!VirtualFree((void*)(start - si.dwPageSize), 0, MEM_RELEASE))
- fatal_error("Segment deallocation failed",0);
+segment::~segment() {
+ SYSTEM_INFO si;
+ GetSystemInfo(&si);
+ if (!VirtualFree((void*)(start - si.dwPageSize), 0, MEM_RELEASE))
+ fatal_error("Segment deallocation failed", 0);
}
-long getpagesize()
-{
- static long g_pagesize = 0;
- if(!g_pagesize)
- {
- SYSTEM_INFO system_info;
- GetSystemInfo (&system_info);
- g_pagesize = system_info.dwPageSize;
- }
- return g_pagesize;
+long getpagesize() {
+ static long g_pagesize = 0;
+ if (!g_pagesize) {
+ SYSTEM_INFO system_info;
+ GetSystemInfo(&system_info);
+ g_pagesize = system_info.dwPageSize;
+ }
+ 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() {}
-THREADHANDLE start_thread(void *(*start_routine)(void *), void *args)
-{
- return (void *)CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)start_routine, args, 0, 0);
+THREADHANDLE start_thread(void* (*start_routine)(void*), void* args) {
+ return (void*)CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) start_routine,
+ args, 0, 0);
}
-u64 nano_count()
-{
- static double scale_factor;
+uint64_t nano_count() {
+ static double scale_factor;
+
+ 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)
+ fatal_error("QueryPerformanceCounter", 0);
+
+ if (scale_factor == 0.0) {
+ LARGE_INTEGER frequency;
+ BOOL ret = QueryPerformanceFrequency(&frequency);
+ if (ret == 0)
+ fatal_error("QueryPerformanceFrequency", 0);
+ scale_factor = (1000000000.0 / frequency.QuadPart);
+ }
- static u32 hi = 0;
- static u32 lo = 0;
+#ifdef FACTOR_64
+ hi = count.HighPart;
+#else
+ // On VirtualBox, QueryPerformanceCounter does not increment
+ // the high part every time the low part overflows. Workaround.
+ if (lo > count.LowPart)
+ hi++;
+#endif
+ lo = count.LowPart;
+
+ return (uint64_t)((((uint64_t)hi << 32) | (uint64_t)lo) * scale_factor);
+}
- LARGE_INTEGER count;
- BOOL ret = QueryPerformanceCounter(&count);
- if(ret == 0)
- fatal_error("QueryPerformanceCounter", 0);
+void sleep_nanos(uint64_t nsec) { Sleep((DWORD)(nsec / 1000000)); }
- if(scale_factor == 0.0)
- {
- LARGE_INTEGER frequency;
- BOOL ret = QueryPerformanceFrequency(&frequency);
- if(ret == 0)
- fatal_error("QueryPerformanceFrequency", 0);
- scale_factor = (1000000000.0 / frequency.QuadPart);
- }
+#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:
+ 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;
+
+ case STATUS_FLOAT_DENORMAL_OPERAND:
+ case STATUS_FLOAT_DIVIDE_BY_ZERO:
+ case STATUS_FLOAT_INEXACT_RESULT:
+ case STATUS_FLOAT_INVALID_OPERATION:
+ case STATUS_FLOAT_OVERFLOW:
+ case STATUS_FLOAT_STACK_CHECK:
+ case STATUS_FLOAT_UNDERFLOW:
+ case STATUS_FLOAT_MULTIPLE_FAULTS:
+ case STATUS_FLOAT_MULTIPLE_TRAPS:
#ifdef FACTOR_64
- hi = count.HighPart;
+ signal_fpu_status = fpu_status(MXCSR(c));
#else
- /* On VirtualBox, QueryPerformanceCounter does not increment
- the high part every time the low part overflows. Workaround. */
- if(lo > count.LowPart)
- hi++;
-#endif
- lo = count.LowPart;
+ signal_fpu_status = fpu_status(X87SW(c) | MXCSR(c));
- return (u64)((((u64)hi << 32) | (u64)lo) * scale_factor);
+ // This seems to have no effect
+ X87SW(c) = 0;
+#endif
+ MXCSR(c) &= 0xffffffc0;
+ dispatch_signal_handler((cell*)&c->ESP, (cell*)&c->EIP,
+ (cell)factor::fp_signal_handler_impl);
+ break;
+ default:
+ signal_number = e->ExceptionCode;
+ dispatch_signal_handler((cell*)&c->ESP, (cell*)&c->EIP,
+ (cell)factor::synchronous_signal_handler_impl);
+ break;
+ }
+ return ExceptionContinueExecution;
}
-void sleep_nanos(u64 nsec)
-{
- Sleep((DWORD)(nsec/1000000));
+VM_C_API LONG exception_handler(PEXCEPTION_RECORD e, void* frame, PCONTEXT c,
+ void* dispatch) {
+ factor_vm* vm = current_vm_p();
+ if (factor_vm::fatal_erroring_p || !vm)
+ return ExceptionContinueSearch;
+ return vm->exception_handler(e, frame, c, dispatch);
}
-LONG factor_vm::exception_handler(PEXCEPTION_RECORD e, void *frame, PCONTEXT c, void *dispatch)
-{
- switch (e->ExceptionCode)
- {
- case EXCEPTION_ACCESS_VIOLATION:
- signal_fault_addr = e->ExceptionInformation[1];
- dispatch_signal_handler(
- (cell*)&c->ESP,
- (cell*)&c->EIP,
- (cell)factor::memory_signal_handler_impl
- );
- break;
-
- case STATUS_FLOAT_DENORMAL_OPERAND:
- case STATUS_FLOAT_DIVIDE_BY_ZERO:
- case STATUS_FLOAT_INEXACT_RESULT:
- case STATUS_FLOAT_INVALID_OPERATION:
- case STATUS_FLOAT_OVERFLOW:
- case STATUS_FLOAT_STACK_CHECK:
- case STATUS_FLOAT_UNDERFLOW:
- case STATUS_FLOAT_MULTIPLE_FAULTS:
- case STATUS_FLOAT_MULTIPLE_TRAPS:
-#ifdef FACTOR_64
- signal_fpu_status = fpu_status(MXCSR(c));
+// 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.
+ if (err == ERROR_NOT_FOUND) {
+ if (!QueueUserAPC(&dummy_cb, thread, NULL)) {
+ fatal_error("QueueUserAPC() failed", GetLastError());
+ }
+ } else {
+ fatal_error("CancelSynchronousIo() failed", err);
+ }
+ }
+}
#else
- signal_fpu_status = fpu_status(X87SW(c) | MXCSR(c));
-
- /* This seems to have no effect */
- X87SW(c) = 0;
+static void wake_up_thread(HANDLE thread) { (void)thread; }
#endif
- MXCSR(c) &= 0xffffffc0;
- dispatch_signal_handler(
- (cell*)&c->ESP,
- (cell*)&c->EIP,
- (cell)factor::fp_signal_handler_impl
- );
- break;
- default:
- signal_number = e->ExceptionCode;
- dispatch_signal_handler(
- (cell*)&c->ESP,
- (cell*)&c->EIP,
- (cell)factor::synchronous_signal_handler_impl
- );
- break;
- }
-
- return 0;
+
+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.
+ FACTOR_ASSERT(thread_vms.size() == 1);
+ factor_vm* vm = thread_vms.begin()->second;
+ vm->enqueue_fep();
+
+ // Before leaving the ctrl_handler, try and wake up the main thread.
+ wake_up_thread(factor::boot_thread);
+ return TRUE;
+ }
+ default:
+ return FALSE;
+ }
}
-VM_C_API LONG exception_handler(PEXCEPTION_RECORD e, void *frame, PCONTEXT c, void *dispatch)
-{
- factor_vm *vm = current_vm_p();
- if (vm)
- return vm->exception_handler(e,frame,c,dispatch);
- else
- {
- fatal_error("Foreign thread received exception", e->ExceptionCode);
- return 0; // to placate MSVC
- }
+void open_console() { handle_ctrl_c(); }
+
+void ignore_ctrl_c() {
+ SetConsoleCtrlHandler(factor::ctrl_handler, FALSE);
}
-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. */
- assert(thread_vms.size() == 1);
- factor_vm *vm = thread_vms.begin()->second;
- vm->safepoint.enqueue_fep(vm);
- return TRUE;
- }
- default:
- return FALSE;
- }
+void handle_ctrl_c() {
+ SetConsoleCtrlHandler(factor::ctrl_handler, TRUE);
}
-void factor_vm::open_console()
-{
- SetConsoleCtrlHandler(factor::ctrl_handler, TRUE);
+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::lock_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::unlock_console()
-{
+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::sampler_thread_loop()
-{
- LARGE_INTEGER counter, new_counter, units_per_second;
- DWORD ok;
-
- ok = QueryPerformanceFrequency(&units_per_second);
- assert(ok);
-
- ok = QueryPerformanceCounter(&counter);
- assert(ok);
-
- counter.QuadPart *= samples_per_second;
- while (atomic::load(&sampling_profiler_p))
- {
- SwitchToThread();
- ok = QueryPerformanceCounter(&new_counter);
- assert(ok);
- new_counter.QuadPart *= samples_per_second;
- cell samples = 0;
- while (new_counter.QuadPart - counter.QuadPart > units_per_second.QuadPart)
- {
- ++samples;
- counter.QuadPart += units_per_second.QuadPart;
- }
-
- if (samples > 0)
- {
- DWORD suscount = SuspendThread(thread);
- assert(suscount == 0);
-
- CONTEXT context;
- memset((void*)&context, 0, sizeof(CONTEXT));
- context.ContextFlags = CONTEXT_CONTROL;
- BOOL context_ok = GetThreadContext(thread, &context);
- assert(context_ok);
-
- suscount = ResumeThread(thread);
- assert(suscount == 1);
-
- safepoint.enqueue_samples(this, samples, context.EIP, false);
- }
- }
+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;
}
-static DWORD WINAPI sampler_thread_entry(LPVOID parent_vm)
-{
- static_cast<factor_vm*>(parent_vm)->sampler_thread_loop();
- return 0;
+void factor_vm::sampler_thread_loop() {
+ LARGE_INTEGER counter, new_counter, units_per_second;
+ DWORD ok;
+
+ ok = QueryPerformanceFrequency(&units_per_second);
+ FACTOR_ASSERT(ok);
+
+ ok = QueryPerformanceCounter(&counter);
+ FACTOR_ASSERT(ok);
+
+ counter.QuadPart *= samples_per_second;
+ while (atomic::load(&sampling_profiler_p)) {
+ SwitchToThread();
+ ok = QueryPerformanceCounter(&new_counter);
+ FACTOR_ASSERT(ok);
+ new_counter.QuadPart *= samples_per_second;
+ cell samples = 0;
+ while (new_counter.QuadPart - counter.QuadPart >
+ units_per_second.QuadPart) {
+ ++samples;
+ counter.QuadPart += units_per_second.QuadPart;
+ }
+ if (samples == 0)
+ continue;
+
+ cell pc = get_thread_pc(thread);
+ enqueue_samples(samples, pc, false);
+ }
}
-void factor_vm::start_sampling_profiler_timer()
-{
- sampler_thread = CreateThread(
- NULL,
- 0,
- &sampler_thread_entry,
- static_cast<LPVOID>(this),
- 0,
- NULL
- );
+static DWORD WINAPI sampler_thread_entry(LPVOID parent_vm) {
+ static_cast<factor_vm*>(parent_vm)->sampler_thread_loop();
+ return 0;
}
-void factor_vm::end_sampling_profiler_timer()
-{
- atomic::store(&sampling_profiler_p, false);
- DWORD wait_result = WaitForSingleObject(sampler_thread,
- 3000*(DWORD)samples_per_second);
- if (wait_result != WAIT_OBJECT_0)
- TerminateThread(sampler_thread, 0);
- sampler_thread = NULL;
+void factor_vm::start_sampling_profiler_timer() {
+ sampler_thread = CreateThread(NULL, 0, &sampler_thread_entry,
+ static_cast<LPVOID>(this), 0, NULL);
}
+void factor_vm::end_sampling_profiler_timer() {
+ atomic::store(&sampling_profiler_p, false);
+ DWORD wait_result =
+ WaitForSingleObject(sampler_thread, 3000 * (DWORD) samples_per_second);
+ if (wait_result != WAIT_OBJECT_0)
+ TerminateThread(sampler_thread, 0);
+ CloseHandle(sampler_thread);
+ sampler_thread = NULL;
+}
+
+void abort() { ::abort(); }
+
}
projects / factor.git / blobdiff