factor/vm/os-windows.cpp

348 lines
9.9 KiB
C++

#include "master.hpp"
namespace factor {
HMODULE hFactorDll;
void factor_vm::init_ffi() {
hFactorDll = GetModuleHandle(FACTOR_DLL);
if (!hFactorDll)
fatal_error("GetModuleHandle() failed", 0);
}
void factor_vm::ffi_dlopen(dll* dll) {
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);
}
void* factor_vm::ffi_dlsym_raw(dll* dll, symbol_char* symbol) {
return ffi_dlsym(dll, symbol);
}
void factor_vm::ffi_dlclose(dll* dll) {
FreeLibrary((HMODULE) dll->handle);
dll->handle = NULL;
}
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::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. */
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 ((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;
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);
}
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_;
char* mem;
DWORD ignore;
if ((mem = (char*)VirtualAlloc(
NULL, getpagesize() * 2 + size, MEM_COMMIT,
executable_p ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE)) ==
0)
out_of_memory();
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;
}
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;
}
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);
}
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);
}
u64 nano_count() {
static double scale_factor;
static u32 hi = 0;
static u32 lo = 0;
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);
}
#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 (u64)((((u64) hi << 32) | (u64) lo) * scale_factor);
}
void sleep_nanos(u64 nsec) { Sleep((DWORD)(nsec / 1000000)); }
typedef enum _EXCEPTION_DISPOSITION {
ExceptionContinueExecution = 0,
ExceptionContinueSearch = 1,
ExceptionNestedException = 2,
ExceptionCollidedUnwind = 3
} EXCEPTION_DISPOSITION;
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];
verify_memory_protection_error(signal_fault_addr);
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));
#else
signal_fpu_status = fpu_status(X87SW(c) | MXCSR(c));
/* 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;
}
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
return ExceptionContinueSearch;
}
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->safepoint.enqueue_fep(vm);
return TRUE;
}
default:
return FALSE;
}
}
void factor_vm::open_console() { handle_ctrl_c(); }
void factor_vm::ignore_ctrl_c() {
SetConsoleCtrlHandler(factor::ctrl_handler, FALSE);
}
void factor_vm::handle_ctrl_c() {
SetConsoleCtrlHandler(factor::ctrl_handler, TRUE);
}
void factor_vm::lock_console() {}
void factor_vm::unlock_console() {}
void factor_vm::close_console() {}
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) {
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);
}
}
}
static DWORD WINAPI sampler_thread_entry(LPVOID parent_vm) {
static_cast<factor_vm*>(parent_vm)->sampler_thread_loop();
return 0;
}
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);
sampler_thread = NULL;
}
void abort() { ::abort(); }
}