X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fwin32-os.c;h=80a6ed2b1a53a03c722e121abb79bb35fb374d19;hb=9e58342e3ebb8bbaaa648cd345232b08279f3a0c;hp=c1bf6a258425b12e22798a6b66ea54ca962d4da0;hpb=6c786e7a88db0eb7bcfae4afd35ec7aad6682ecb;p=sbcl.git diff --git a/src/runtime/win32-os.c b/src/runtime/win32-os.c index c1bf6a2..80a6ed2 100644 --- a/src/runtime/win32-os.c +++ b/src/runtime/win32-os.c @@ -26,9 +26,11 @@ * yet. */ +#include #include #include #include +#include #include "sbcl.h" #include "./signal.h" #include "os.h" @@ -38,9 +40,10 @@ #include "interrupt.h" #include "interr.h" #include "lispregs.h" -#include "monitor.h" +#include "runtime.h" #include "alloc.h" #include "genesis/primitive-objects.h" +#include "dynbind.h" #include #include @@ -48,13 +51,15 @@ #include #include +#include +#include + #include #include "validate.h" #include "thread.h" size_t os_vm_page_size; - #include "gc.h" #include "gencgc-internal.h" @@ -83,6 +88,7 @@ static void set_seh_frame(void *frame) asm volatile ("movl %0,%%fs:0": : "r" (frame)); } +#if 0 static struct lisp_exception_frame *find_our_seh_frame(void) { struct lisp_exception_frame *frame = get_seh_frame(); @@ -93,7 +99,6 @@ static struct lisp_exception_frame *find_our_seh_frame(void) return frame; } -#if 0 inline static void *get_stack_frame(void) { void* retval; @@ -144,7 +149,7 @@ os_validate(os_vm_address_t addr, os_vm_size_t len) /* the simple case first */ os_vm_address_t real_addr; if (!(real_addr = VirtualAlloc(addr, len, MEM_COMMIT, PAGE_EXECUTE_READWRITE))) { - perror("VirtualAlloc"); + fprintf(stderr, "VirtualAlloc: 0x%lx.\n", GetLastError()); return 0; } @@ -152,11 +157,26 @@ os_validate(os_vm_address_t addr, os_vm_size_t len) } if (!VirtualQuery(addr, &mem_info, sizeof mem_info)) { - perror("VirtualQuery"); + fprintf(stderr, "VirtualQuery: 0x%lx.\n", GetLastError()); return 0; } - if ((mem_info.State == MEM_RESERVE) && (mem_info.RegionSize >=len)) return addr; + if ((mem_info.State == MEM_RESERVE) && (mem_info.RegionSize >=len)) { + /* It would be correct to return here. However, support for Wine + * is beneficial, and Wine has a strange behavior in this + * department. It reports all memory below KERNEL32.DLL as + * reserved, but disallows MEM_COMMIT. + * + * Let's work around it: reserve the region we need for a second + * time. The second reservation is documented to fail on normal NT + * family, but it will succeed on Wine if this region is + * actually free. + */ + VirtualAlloc(addr, len, MEM_RESERVE, PAGE_EXECUTE_READWRITE); + /* If it is wine, the second call has succeded, and now the region + * is really reserved. */ + return addr; + } if (mem_info.State == MEM_RESERVE) { fprintf(stderr, "validation of reserved space too short.\n"); @@ -164,7 +184,7 @@ os_validate(os_vm_address_t addr, os_vm_size_t len) } if (!VirtualAlloc(addr, len, (mem_info.State == MEM_RESERVE)? MEM_COMMIT: MEM_RESERVE, PAGE_EXECUTE_READWRITE)) { - perror("VirtualAlloc"); + fprintf(stderr, "VirtualAlloc: 0x%lx.\n", GetLastError()); return 0; } @@ -190,7 +210,7 @@ void os_invalidate(os_vm_address_t addr, os_vm_size_t len) { if (!VirtualFree(addr, len, MEM_DECOMMIT)) { - perror("VirtualFree"); + fprintf(stderr, "VirtualFree: 0x%lx.\n", GetLastError()); } } @@ -210,11 +230,13 @@ os_map(int fd, int offset, os_vm_address_t addr, os_vm_size_t len) { os_vm_size_t count; +#if 0 fprintf(stderr, "os_map: %d, 0x%x, %p, 0x%x.\n", fd, offset, addr, len); fflush(stderr); +#endif if (!VirtualAlloc(addr, len, MEM_COMMIT, PAGE_EXECUTE_READWRITE)) { - perror("VirtualAlloc"); + fprintf(stderr, "VirtualAlloc: 0x%lx.\n", GetLastError()); lose("os_map: VirtualAlloc failure"); } @@ -266,12 +288,18 @@ in_range_p(os_vm_address_t a, lispobj sbeg, size_t slen) } boolean +is_linkage_table_addr(os_vm_address_t addr) +{ + return in_range_p(addr, LINKAGE_TABLE_SPACE_START, LINKAGE_TABLE_SPACE_END); +} + +boolean is_valid_lisp_addr(os_vm_address_t addr) { struct thread *th; if(in_range_p(addr, READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE) || in_range_p(addr, STATIC_SPACE_START , STATIC_SPACE_SIZE) || - in_range_p(addr, DYNAMIC_SPACE_START , DYNAMIC_SPACE_SIZE)) + in_range_p(addr, DYNAMIC_SPACE_START , dynamic_space_size)) return 1; for_each_thread(th) { if(((os_vm_address_t)th->control_stack_start <= addr) && (addr < (os_vm_address_t)th->control_stack_end)) @@ -282,138 +310,71 @@ is_valid_lisp_addr(os_vm_address_t addr) return 0; } -/* - * any OS-dependent special low-level handling for signals - */ - /* A tiny bit of interrupt.c state we want our paws on. */ extern boolean internal_errors_enabled; +#ifdef LISP_FEATURE_UD2_BREAKPOINTS +#define IS_TRAP_EXCEPTION(exception_record, context) \ + (((exception_record)->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION) && \ + (((unsigned short *)((context)->Eip))[0] == 0x0b0f)) +#define TRAP_CODE_WIDTH 2 +#else +#define IS_TRAP_EXCEPTION(exception_record, context) \ + ((exception_record)->ExceptionCode == EXCEPTION_BREAKPOINT) +#define TRAP_CODE_WIDTH 1 +#endif + /* - * FIXME: There is a potential problem with foreign code here. - * If we are running foreign code instead of lisp code and an - * exception occurs we arrange a call into Lisp. If the - * foreign code has installed an exception handler, we run the - * very great risk of throwing through their exception handler - * without asking it to unwind. This is more a problem with - * non-sigtrap (EXCEPTION_BREAKPOINT) exceptions, as they could - * reasonably be expected to happen in foreign code. We need to - * figure out the exception handler unwind semantics and adhere - * to them (probably by abusing the Lisp unwind-protect system) - * if we are going to handle this scenario correctly. - * * A good explanation of the exception handling semantics is * http://win32assembly.online.fr/Exceptionhandling.html . - * We will also need to handle this ourselves when foreign - * code tries to unwind -us-. - * - * When unwinding through foreign code we should unwind the - * Lisp stack to the entry from foreign code, then unwind the - * foreign code stack to the entry from Lisp, then resume - * unwinding in Lisp. */ -EXCEPTION_DISPOSITION sigtrap_emulator(CONTEXT *context, - struct lisp_exception_frame *exception_frame) +EXCEPTION_DISPOSITION +handle_exception(EXCEPTION_RECORD *exception_record, + struct lisp_exception_frame *exception_frame, + CONTEXT *context, + void *dispatcher_context) { - if (*((char *)context->Eip + 1) == trap_ContextRestore) { - /* - * This is the cleanup for what is immediately below, and - * for the generic exception handling further below. We - * have to memcpy() the original context (emulated sigtrap - * or normal exception) over our context and resume it. - */ - memcpy(context, &exception_frame->context, sizeof(CONTEXT)); - return ExceptionContinueExecution; + if (exception_record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)) { + /* If we're being unwound, be graceful about it. */ - } else { /* Not a trap_ContextRestore, must be a sigtrap. */ - /* sigtrap_trampoline is defined in x86-assem.S. */ - extern void sigtrap_trampoline; - - /* - * Unlike some other operating systems, Win32 leaves EIP - * pointing to the breakpoint instruction. - */ - context->Eip++; - - /* - * We're not on an alternate stack like we would be in some - * other operating systems, and we don't want to risk leaking - * any important resources if we throw out of the sigtrap - * handler, so we need to copy off our context to a "safe" - * place and then monkey with the return EIP to point to a - * trampoline which calls another function which copies the - * context out to a really-safe place and then calls the real - * sigtrap handler. When the real sigtrap handler returns, the - * trampoline then contains another breakpoint with a code of - * trap_ContextRestore (see above). Essentially the same - * mechanism is used by the generic exception path. There is - * a small window of opportunity between us copying the - * context to the "safe" place and the sigtrap wrapper copying - * it to the really-safe place (allocated in its stack frame) - * during which the context can be smashed. The only scenario - * I can come up with for this, however, involves a stack - * overflow occuring at just the wrong time (which makes one - * wonder how stack overflow exceptions even happen, given - * that we don't switch stacks for exception processing...) - */ - memcpy(&exception_frame->context, context, sizeof(CONTEXT)); - context->Eax = context->Eip; - context->Eip = (unsigned long)&sigtrap_trampoline; - - /* and return */ - return ExceptionContinueExecution; - } -} - -void sigtrap_wrapper(void) -{ - /* - * This is the wrapper around the sigtrap handler called from - * the trampoline returned to from the function above. - * - * There actually is a point to some of the commented-out code - * in this function, although it really belongs to the callback - * wrappers. Once it is installed there, it can probably be - * removed from here. - */ - - extern void sigtrap_handler(int signal, siginfo_t *info, void *context); - -/* volatile struct { */ -/* void *handler[2]; */ - CONTEXT context; -/* } handler; */ - - struct lisp_exception_frame *frame = find_our_seh_frame(); - -/* wos_install_interrupt_handlers(handler); */ -/* handler.handler[0] = get_seh_frame(); */ -/* handler.handler[1] = &handle_exception; */ -/* set_seh_frame(&handler); */ + /* Undo any dynamic bindings. */ + unbind_to_here(exception_frame->bindstack_pointer, + arch_os_get_current_thread()); - memcpy(&context, &frame->context, sizeof(CONTEXT)); - sigtrap_handler(0, NULL, &context); - memcpy(&frame->context, &context, sizeof(CONTEXT)); - -/* set_seh_frame(handler.handler[0]); */ -} - -EXCEPTION_DISPOSITION handle_exception(EXCEPTION_RECORD *exception_record, - struct lisp_exception_frame *exception_frame, - CONTEXT *context, - void *dc) /* FIXME: What's dc again? */ -{ + return ExceptionContinueSearch; + } /* For EXCEPTION_ACCESS_VIOLATION only. */ void *fault_address = (void *)exception_record->ExceptionInformation[1]; - if (exception_record->ExceptionCode == EXCEPTION_BREAKPOINT) { - /* Pick off sigtrap case first. */ - return sigtrap_emulator(context, exception_frame); + if (single_stepping && + exception_record->ExceptionCode == EXCEPTION_SINGLE_STEP) { + /* We are doing a displaced instruction. At least function + * end breakpoints uses this. */ + restore_breakpoint_from_single_step(context); + return ExceptionContinueExecution; + } - } else if (exception_record->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && - is_valid_lisp_addr(fault_address)) { + if (IS_TRAP_EXCEPTION(exception_record, context)) { + unsigned char trap; + /* This is just for info in case the monitor wants to print an + * approximation. */ + current_control_stack_pointer = + (lispobj *)*os_context_sp_addr(context); + /* Unlike some other operating systems, Win32 leaves EIP + * pointing to the breakpoint instruction. */ + context->Eip += TRAP_CODE_WIDTH; + /* Now EIP points just after the INT3 byte and aims at the + * 'kind' value (eg trap_Cerror). */ + trap = *(unsigned char *)(*os_context_pc_addr(context)); + handle_trap(context, trap); + /* Done, we're good to go! */ + return ExceptionContinueExecution; + } + else if (exception_record->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && + (is_valid_lisp_addr(fault_address) || + is_linkage_table_addr(fault_address))) { /* Pick off GC-related memory fault next. */ MEMORY_BASIC_INFORMATION mem_info; @@ -438,7 +399,7 @@ EXCEPTION_DISPOSITION handle_exception(EXCEPTION_RECORD *exception_record, * exception handler if the gc doesn't take the wp violation? */ if (exception_record->ExceptionInformation[0]) { - int index = find_page_index(fault_address); + page_index_t index = find_page_index(fault_address); if ((index != -1) && (page_table[index].write_protected)) { gencgc_handle_wp_violation(fault_address); } @@ -461,38 +422,35 @@ EXCEPTION_DISPOSITION handle_exception(EXCEPTION_RECORD *exception_record, */ if (internal_errors_enabled) { - /* exception_trampoline is defined in x86-assem.S. */ - extern void exception_trampoline; - - /* - * We're making the somewhat arbitrary decision that - * having internal errors enabled means that lisp has - * sufficient marbles to be able to handle exceptions. - * - * Exceptions aren't supposed to happen during cold - * init or reinit anyway. - */ - - /* - * We use the same mechanism as the sigtrap emulator above - * with just a couple changes. We obviously use a different - * trampoline and wrapper function, we kill out any live - * floating point exceptions, and we save off the exception - * record as well as the context. - */ - - /* Save off context and exception information */ - memcpy(&exception_frame->context, context, sizeof(CONTEXT)); - memcpy(&exception_frame->exception, exception_record, sizeof(EXCEPTION_RECORD)); - - /* Set up to activate trampoline when we return */ - context->Eax = context->Eip; - context->Eip = (unsigned long)&exception_trampoline; - - /* Make sure a floating-point trap doesn't kill us */ - context->FloatSave.StatusWord &= ~0x3f; - - /* And return */ + lispobj context_sap; + lispobj exception_record_sap; + + /* We're making the somewhat arbitrary decision that having + * internal errors enabled means that lisp has sufficient + * marbles to be able to handle exceptions, but exceptions + * aren't supposed to happen during cold init or reinit + * anyway. */ + + fake_foreign_function_call(context); + + /* Allocate the SAP objects while the "interrupts" are still + * disabled. */ + context_sap = alloc_sap(context); + exception_record_sap = alloc_sap(exception_record); + + /* The exception system doesn't automatically clear pending + * exceptions, so we lose as soon as we execute any FP + * instruction unless we do this first. */ + _clearfp(); + + /* Call into lisp to handle things. */ + funcall2(StaticSymbolFunction(HANDLE_WIN32_EXCEPTION), context_sap, + exception_record_sap); + + /* If Lisp doesn't nlx, we need to put things back. */ + undo_fake_foreign_function_call(context); + + /* FIXME: HANDLE-WIN32-EXCEPTION should be allowed to decline */ return ExceptionContinueExecution; } @@ -513,37 +471,12 @@ EXCEPTION_DISPOSITION handle_exception(EXCEPTION_RECORD *exception_record, fflush(stderr); fake_foreign_function_call(context); - monitor_or_something(); + lose("Exception too early in cold init, cannot continue."); + /* FIXME: WTF? How are we supposed to end up here? */ return ExceptionContinueSearch; } -void handle_win32_exception_wrapper(void) -{ - struct lisp_exception_frame *frame = find_our_seh_frame(); - CONTEXT context; - EXCEPTION_RECORD exception_record; - lispobj context_sap; - lispobj exception_record_sap; - - memcpy(&context, &frame->context, sizeof(CONTEXT)); - memcpy(&exception_record, &frame->exception, sizeof(EXCEPTION_RECORD)); - - fake_foreign_function_call(&context); - - /* Allocate the SAP objects while the "interrupts" are still - * disabled. */ - context_sap = alloc_sap(&context); - exception_record_sap = alloc_sap(&exception_record); - - funcall2(SymbolFunction(HANDLE_WIN32_EXCEPTION), context_sap, - exception_record_sap); - - undo_fake_foreign_function_call(&context); - - memcpy(&frame->context, &context, sizeof(CONTEXT)); -} - void wos_install_interrupt_handlers(struct lisp_exception_frame *handler) { @@ -581,26 +514,111 @@ void *memcpy(void *dest, const void *src, size_t n) return dest; } +char *dirname(char *path) +{ + static char buf[PATH_MAX + 1]; + size_t pathlen = strlen(path); + int i; + + if (pathlen >= sizeof(buf)) { + lose("Pathname too long in dirname.\n"); + return NULL; + } + + strcpy(buf, path); + for (i = pathlen; i >= 0; --i) { + if (buf[i] == '/' || buf[i] == '\\') { + buf[i] = '\0'; + break; + } + } + + return buf; +} + /* This is a manually-maintained version of ldso_stubs.S. */ +void __stdcall RtlUnwind(void *, void *, void *, void *); /* I don't have winternl.h */ + void scratch(void) { - strerror(42); - asin(0); - acos(0); - sinh(0); - cosh(0); - hypot(0, 0); - write(0, 0, 0); + CloseHandle(0); + FlushConsoleInputBuffer(0); + FormatMessageA(0, 0, 0, 0, 0, 0, 0); + FreeLibrary(0); + GetACP(); + GetConsoleCP(); + GetConsoleOutputCP(); + GetCurrentProcess(); + GetExitCodeProcess(0, 0); + GetLastError(); + GetOEMCP(); + GetProcAddress(0, 0); + GetProcessTimes(0, 0, 0, 0, 0); + GetSystemTimeAsFileTime(0); + LoadLibrary(0); + LocalFree(0); + PeekConsoleInput(0, 0, 0, 0); + PeekNamedPipe(0, 0, 0, 0, 0, 0); + ReadFile(0, 0, 0, 0, 0); + Sleep(0); + WriteFile(0, 0, 0, 0, 0); + _get_osfhandle(0); + _rmdir(0); + _pipe(0,0,0); + access(0,0); close(0); - rename(0,0); - getcwd(0,0); dup(0); - LoadLibrary(0); - GetProcAddress(0, 0); - mkdir(0); isatty(0); - access(0,0) + strerror(42); + write(0, 0, 0); + RtlUnwind(0, 0, 0, 0); + MapViewOfFile(0,0,0,0,0); + UnmapViewOfFile(0); + FlushViewOfFile(0,0); + #ifndef LISP_FEATURE_SB_UNICODE + CreateDirectoryA(0,0); + CreateFileMappingA(0,0,0,0,0,0); + CreateFileA(0,0,0,0,0,0,0); + GetComputerNameA(0, 0); + GetCurrentDirectoryA(0,0); + GetEnvironmentVariableA(0, 0, 0); + GetFileAttributesA(0); + GetVersionExA(0); + MoveFileA(0,0); + SHGetFolderPathA(0, 0, 0, 0, 0); + SetCurrentDirectoryA(0); + SetEnvironmentVariableA(0, 0); + #else + CreateDirectoryW(0,0); + CreateFileMappingW(0,0,0,0,0,0); + CreateFileW(0,0,0,0,0,0,0); + FormatMessageW(0, 0, 0, 0, 0, 0, 0); + GetComputerNameW(0, 0); + GetCurrentDirectoryW(0,0); + GetEnvironmentVariableW(0, 0, 0); + GetFileAttributesW(0); + GetVersionExW(0); + MoveFileW(0,0); + SHGetFolderPathW(0, 0, 0, 0, 0); + SetCurrentDirectoryW(0); + SetEnvironmentVariableW(0, 0); + #endif +} + +char * +os_get_runtime_executable_path(int external) +{ + char path[MAX_PATH + 1]; + DWORD bufsize = sizeof(path); + DWORD size; + + if ((size = GetModuleFileNameA(NULL, path, bufsize)) == 0) + return NULL; + else if (size == bufsize && GetLastError() == ERROR_INSUFFICIENT_BUFFER) + return NULL; + + return copied_string(path); } /* EOF */