#include "runtime.h"
#include "alloc.h"
#include "genesis/primitive-objects.h"
+#include "dynbind.h"
#include <sys/types.h>
#include <signal.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <unistd.h>
-#include <shlobj.h>
+
+#include <math.h>
+#include <float.h>
#include <excpt.h>
#include "thread.h"
size_t os_vm_page_size;
-
#include "gc.h"
#include "gencgc-internal.h"
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();
return frame;
}
-#if 0
inline static void *get_stack_frame(void)
{
void* retval;
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");
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))
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;
-/*
- * 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)
+#if defined(LISP_FEATURE_X86)
+static int
+handle_single_step(os_context_t *ctx)
{
- 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 (!single_stepping)
+ return -1;
- } 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));
-
- /* FIXME: Why do we save the old EIP in EAX? The sigtrap_trampoline
- * pushes it into stack, but the sigtrap_wrapper where the trampoline
- * goes ignores it, and after the wrapper we hit the trap_ContextRestore,
- * which nukes the whole context with the original one?
- *
- * Am I misreading this, or is the EAX here and in the
- * trampoline superfluous? --NS 20061024 */
- context->Eax = context->Eip;
- context->Eip = (unsigned long)&sigtrap_trampoline;
-
- /* and return */
- return ExceptionContinueExecution;
- }
+ /* We are doing a displaced instruction. At least function
+ * end breakpoints use this. */
+ restore_breakpoint_from_single_step(ctx);
+
+ return 0;
}
+#endif
+
+#ifdef LISP_FEATURE_UD2_BREAKPOINTS
+#define SBCL_EXCEPTION_BREAKPOINT EXCEPTION_ILLEGAL_INSTRUCTION
+#define TRAP_CODE_WIDTH 2
+#else
+#define SBCL_EXCEPTION_BREAKPOINT EXCEPTION_BREAKPOINT
+#define TRAP_CODE_WIDTH 1
+#endif
-void sigtrap_wrapper(void)
+static int
+handle_breakpoint_trap(os_context_t *ctx)
{
- /*
- * 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);
+#ifdef LISP_FEATURE_UD2_BREAKPOINTS
+ if (((unsigned short *)((ctx->win32_context)->Eip))[0] != 0x0b0f)
+ return -1;
+#endif
-/* volatile struct { */
-/* void *handler[2]; */
- CONTEXT context;
-/* } handler; */
+ /* Unlike some other operating systems, Win32 leaves EIP
+ * pointing to the breakpoint instruction. */
+ ctx->Eip += TRAP_CODE_WIDTH;
- struct lisp_exception_frame *frame = find_our_seh_frame();
+ /* Now EIP points just after the INT3 byte and aims at the
+ * 'kind' value (eg trap_Cerror). */
+ unsigned char trap = *(unsigned char *)(*os_context_pc_addr(ctx));
-/* wos_install_interrupt_handlers(handler); */
-/* handler.handler[0] = get_seh_frame(); */
-/* handler.handler[1] = &handle_exception; */
-/* set_seh_frame(&handler); */
+ /* This is just for info in case the monitor wants to print an
+ * approximation. */
+ current_control_stack_pointer =
+ (lispobj *)*os_context_sp_addr(ctx);
- memcpy(&context, &frame->context, sizeof(CONTEXT));
- sigtrap_handler(0, NULL, &context);
- memcpy(&frame->context, &context, sizeof(CONTEXT));
+ handle_trap(ctx, trap);
-/* set_seh_frame(handler.handler[0]); */
+ /* Done, we're good to go! */
+ return 0;
}
-EXCEPTION_DISPOSITION handle_exception(EXCEPTION_RECORD *exception_record,
- struct lisp_exception_frame *exception_frame,
- CONTEXT *context,
- void *dc) /* FIXME: What's dc again? */
+static int
+handle_access_violation(os_context_t *ctx,
+ EXCEPTION_RECORD *exception_record,
+ void *fault_address)
{
+ if (!(is_valid_lisp_addr(fault_address)
+ || is_linkage_table_addr(fault_address)))
+ return -1;
- /* 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);
+ /* Pick off GC-related memory fault next. */
+ MEMORY_BASIC_INFORMATION mem_info;
+ if (!VirtualQuery(fault_address, &mem_info, sizeof mem_info)) {
+ fprintf(stderr, "VirtualQuery: 0x%lx.\n", GetLastError());
+ lose("handle_exception: VirtualQuery failure");
}
- 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;
-
- if (!VirtualQuery(fault_address, &mem_info, sizeof mem_info)) {
- fprintf(stderr, "VirtualQuery: 0x%lx.\n", GetLastError());
- lose("handle_exception: VirtualQuery failure");
- }
- if (mem_info.State == MEM_RESERVE) {
- /* First use new page, lets get some memory for it. */
- if (!VirtualAlloc(mem_info.BaseAddress, os_vm_page_size,
- MEM_COMMIT, PAGE_EXECUTE_READWRITE)) {
- fprintf(stderr, "VirtualAlloc: 0x%lx.\n", GetLastError());
- lose("handle_exception: VirtualAlloc failure");
-
- } else {
- /*
- * Now, if the page is supposedly write-protected and this
- * is a write, tell the gc that it's been hit.
- *
- * FIXME: Are we supposed to fall-through to the Lisp
- * exception handler if the gc doesn't take the wp violation?
- */
- if (exception_record->ExceptionInformation[0]) {
- int index = find_page_index(fault_address);
- if ((index != -1) && (page_table[index].write_protected)) {
- gencgc_handle_wp_violation(fault_address);
- }
+ if (mem_info.State == MEM_RESERVE) {
+ /* First use new page, lets get some memory for it. */
+ if (!VirtualAlloc(mem_info.BaseAddress, os_vm_page_size,
+ MEM_COMMIT, PAGE_EXECUTE_READWRITE)) {
+ fprintf(stderr, "VirtualAlloc: 0x%lx.\n", GetLastError());
+ lose("handle_exception: VirtualAlloc failure");
+
+ } else {
+ /*
+ * Now, if the page is supposedly write-protected and this
+ * is a write, tell the gc that it's been hit.
+ *
+ * FIXME: Are we supposed to fall-through to the Lisp
+ * exception handler if the gc doesn't take the wp violation?
+ */
+ if (exception_record->ExceptionInformation[0]) {
+ page_index_t index = find_page_index(fault_address);
+ if ((index != -1) && (page_table[index].write_protected)) {
+ gencgc_handle_wp_violation(fault_address);
}
- return ExceptionContinueExecution;
}
-
- } else if (gencgc_handle_wp_violation(fault_address)) {
- /* gc accepts the wp violation, so resume where we left off. */
- return ExceptionContinueExecution;
+ return 0;
}
- /* All else failed, drop through to the lisp-side exception handler. */
+ } else if (gencgc_handle_wp_violation(fault_address)) {
+ /* gc accepts the wp violation, so resume where we left off. */
+ return 0;
}
+ return -1;
+}
+
+static void
+signal_internal_error_or_lose(os_context_t *ctx,
+ EXCEPTION_RECORD *exception_record,
+ void *fault_address)
+{
/*
* If we fall through to here then we need to either forward
* the exception to the lisp-side exception handler if it's
*/
if (internal_errors_enabled) {
- /* exception_trampoline is defined in x86-assem.S. */
- extern void exception_trampoline;
+ 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 xceptions
+ * marbles to be able to handle exceptions, but 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
- *
- * FIXME: Why do we save the old EIP in EAX? The
- * exception_trampoline pushes it into stack, but the wrapper
- * where the trampoline goes ignores it, and then the wrapper
- * unwinds from Lisp... WTF?
- *
- * Am I misreading this, or is the EAX here and in the
- * trampoline superfluous? --NS 20061024 */
- 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. */
- return ExceptionContinueExecution;
+ * anyway. */
+
+ fake_foreign_function_call(ctx);
+
+ /* Allocate the SAP objects while the "interrupts" are still
+ * disabled. */
+ context_sap = alloc_sap(ctx);
+ 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(ctx);
+
+ /* FIXME: HANDLE-WIN32-EXCEPTION should be allowed to decline */
+ return;
}
fprintf(stderr, "Exception Code: 0x%lx.\n", exception_record->ExceptionCode);
fflush(stderr);
- fake_foreign_function_call(context);
- lose("fake_foreign_function_call fell through");
-
- /* FIXME: WTF? How are we supposed to end up here? */
- return ExceptionContinueSearch;
+ fake_foreign_function_call(ctx);
+ lose("Exception too early in cold init, cannot continue.");
}
-void handle_win32_exception_wrapper(void)
+/*
+ * A good explanation of the exception handling semantics is
+ * http://win32assembly.online.fr/Exceptionhandling.html .
+ */
+
+EXCEPTION_DISPOSITION
+handle_exception(EXCEPTION_RECORD *exception_record,
+ struct lisp_exception_frame *exception_frame,
+ CONTEXT *ctx,
+ void *dispatcher_context)
{
- struct lisp_exception_frame *frame = find_our_seh_frame();
- CONTEXT context;
- EXCEPTION_RECORD exception_record;
- lispobj context_sap;
- lispobj exception_record_sap;
+ if (exception_record->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)) {
+ /* If we're being unwound, be graceful about it. */
+
+ /* Undo any dynamic bindings. */
+ unbind_to_here(exception_frame->bindstack_pointer,
+ arch_os_get_current_thread());
+
+ return ExceptionContinueSearch;
+ }
- memcpy(&context, &frame->context, sizeof(CONTEXT));
- memcpy(&exception_record, &frame->exception, sizeof(EXCEPTION_RECORD));
+ DWORD code = exception_record->ExceptionCode;
- fake_foreign_function_call(&context);
+ /* For EXCEPTION_ACCESS_VIOLATION only. */
+ void *fault_address = (void *)exception_record->ExceptionInformation[1];
+
+ /* This function will become unwieldy. Let's cut it down into
+ * pieces based on the different exception codes. Each exception
+ * code handler gets the chance to decline by returning non-zero if it
+ * isn't happy: */
+
+ int rc;
+ switch (code) {
+ case EXCEPTION_ACCESS_VIOLATION:
+ rc = handle_access_violation(
+ ctx, exception_record, fault_address);
+ break;
+
+ case SBCL_EXCEPTION_BREAKPOINT:
+ rc = handle_breakpoint_trap(ctx);
+ break;
+
+#if defined(LISP_FEATURE_X86)
+ case EXCEPTION_SINGLE_STEP:
+ rc = handle_single_step(ctx);
+ break;
+#endif
- /* Allocate the SAP objects while the "interrupts" are still
- * disabled. */
- context_sap = alloc_sap(&context);
- exception_record_sap = alloc_sap(&exception_record);
+ default:
+ rc = -1;
+ }
- funcall2(SymbolFunction(HANDLE_WIN32_EXCEPTION), context_sap,
- exception_record_sap);
+ if (rc)
+ /* All else failed, drop through to the lisp-side exception handler. */
+ signal_internal_error_or_lose(ctx, exception_record, fault_address);
- /* FIXME: These never happen, as the Lisp-side call is
- * to an ERROR, which means we must do a non-local exit
- */
- undo_fake_foreign_function_call(&context);
- memcpy(&frame->context, &context, sizeof(CONTEXT));
+ return ExceptionContinueExecution;
}
void
/* 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)
{
CloseHandle(0);
Sleep(0);
WriteFile(0, 0, 0, 0, 0);
_get_osfhandle(0);
+ _rmdir(0);
_pipe(0,0,0);
access(0,0);
- acos(0);
- asin(0);
close(0);
- cosh(0);
dup(0);
- hypot(0, 0);
isatty(0);
- sinh(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);
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
+ _exit(0);
}
char *
-os_get_runtime_executable_path()
+os_get_runtime_executable_path(int external)
{
char path[MAX_PATH + 1];
DWORD bufsize = sizeof(path);
projects / sbcl.git / blobdiff