Fresh start

1 files changed, 1061 insertions, 0 deletions

diff --git a/jni/ruby/vm_dump.c b/jni/ruby/vm_dump.c
new file mode 100644
index 0000000..6d0e51d
--- /dev/null
+++ b/jni/ruby/vm_dump.c
@@ -0,0 +1,1061 @@
+/**********************************************************************
+
+  vm_dump.c -
+
+  $Author: nagachika $
+
+  Copyright (C) 2004-2007 Koichi Sasada
+
+**********************************************************************/
+
+
+#include "internal.h"
+#include "addr2line.h"
+#include "vm_core.h"
+#include "iseq.h"
+
+/* see vm_insnhelper.h for the values */
+#ifndef VMDEBUG
+#define VMDEBUG 0
+#endif
+
+#define MAX_POSBUF 128
+
+#define VM_CFP_CNT(th, cfp) \
+  ((rb_control_frame_t *)((th)->stack + (th)->stack_size) - (rb_control_frame_t *)(cfp))
+
+static void
+control_frame_dump(rb_thread_t *th, rb_control_frame_t *cfp)
+{
+    ptrdiff_t pc = -1;
+    ptrdiff_t ep = cfp->ep - th->stack;
+    char ep_in_heap = ' ';
+    char posbuf[MAX_POSBUF+1];
+    int line = 0;
+
+    const char *magic, *iseq_name = "-", *selfstr = "-", *biseq_name = "-";
+    VALUE tmp;
+
+    if (cfp->block_iseq != 0 && !RUBY_VM_IFUNC_P(cfp->block_iseq)) {
+	biseq_name = "";	/* RSTRING(cfp->block_iseq->location.label)->ptr; */
+    }
+
+    if (ep < 0 || (size_t)ep > th->stack_size) {
+	ep = (ptrdiff_t)cfp->ep;
+	ep_in_heap = 'p';
+    }
+
+    switch (VM_FRAME_TYPE(cfp)) {
+      case VM_FRAME_MAGIC_TOP:
+	magic = "TOP";
+	break;
+      case VM_FRAME_MAGIC_METHOD:
+	magic = "METHOD";
+	break;
+      case VM_FRAME_MAGIC_CLASS:
+	magic = "CLASS";
+	break;
+      case VM_FRAME_MAGIC_BLOCK:
+	magic = "BLOCK";
+	break;
+      case VM_FRAME_MAGIC_CFUNC:
+	magic = "CFUNC";
+	break;
+      case VM_FRAME_MAGIC_PROC:
+	magic = "PROC";
+	break;
+      case VM_FRAME_MAGIC_LAMBDA:
+	magic = "LAMBDA";
+	break;
+      case VM_FRAME_MAGIC_IFUNC:
+	magic = "IFUNC";
+	break;
+      case VM_FRAME_MAGIC_EVAL:
+	magic = "EVAL";
+	break;
+      case VM_FRAME_MAGIC_RESCUE:
+	magic = "RESCUE";
+	break;
+      case 0:
+	magic = "------";
+	break;
+      default:
+	magic = "(none)";
+	break;
+    }
+
+    if (0) {
+	tmp = rb_inspect(cfp->self);
+	selfstr = StringValueCStr(tmp);
+    }
+    else {
+	selfstr = "";
+    }
+
+    if (cfp->iseq != 0) {
+	if (RUBY_VM_IFUNC_P(cfp->iseq)) {
+	    iseq_name = "<ifunc>";
+	}
+	else {
+	    pc = cfp->pc - cfp->iseq->iseq_encoded;
+	    iseq_name = RSTRING_PTR(cfp->iseq->location.label);
+	    line = rb_vm_get_sourceline(cfp);
+	    if (line) {
+		snprintf(posbuf, MAX_POSBUF, "%s:%d", RSTRING_PTR(cfp->iseq->location.path), line);
+	    }
+	}
+    }
+    else if (cfp->me) {
+	iseq_name = rb_id2name(cfp->me->def->original_id);
+	snprintf(posbuf, MAX_POSBUF, ":%s", iseq_name);
+	line = -1;
+    }
+
+    fprintf(stderr, "c:%04"PRIdPTRDIFF" ",
+	    ((rb_control_frame_t *)(th->stack + th->stack_size) - cfp));
+    if (pc == -1) {
+	fprintf(stderr, "p:---- ");
+    }
+    else {
+	fprintf(stderr, "p:%04"PRIdPTRDIFF" ", pc);
+    }
+    fprintf(stderr, "s:%04"PRIdPTRDIFF" ", cfp->sp - th->stack);
+    fprintf(stderr, ep_in_heap == ' ' ? "e:%06"PRIdPTRDIFF" " : "E:%06"PRIxPTRDIFF" ", ep % 10000);
+    fprintf(stderr, "%-6s", magic);
+    if (line) {
+	fprintf(stderr, " %s", posbuf);
+    }
+    if (VM_FRAME_TYPE_FINISH_P(cfp)) {
+	fprintf(stderr, " [FINISH]");
+    }
+    if (0) {
+	fprintf(stderr, "              \t");
+	fprintf(stderr, "iseq: %-24s ", iseq_name);
+	fprintf(stderr, "self: %-24s ", selfstr);
+	fprintf(stderr, "%-1s ", biseq_name);
+    }
+    fprintf(stderr, "\n");
+}
+
+void
+rb_vmdebug_stack_dump_raw(rb_thread_t *th, rb_control_frame_t *cfp)
+{
+#if 0
+    VALUE *sp = cfp->sp, *ep = cfp->ep;
+    VALUE *p, *st, *t;
+
+    fprintf(stderr, "-- stack frame ------------\n");
+    for (p = st = th->stack; p < sp; p++) {
+	fprintf(stderr, "%04ld (%p): %08"PRIxVALUE, (long)(p - st), p, *p);
+
+	t = (VALUE *)*p;
+	if (th->stack <= t && t < sp) {
+	    fprintf(stderr, " (= %ld)", (long)((VALUE *)GC_GUARDED_PTR_REF(t) - th->stack));
+	}
+
+	if (p == ep)
+	    fprintf(stderr, " <- ep");
+
+	fprintf(stderr, "\n");
+    }
+#endif
+
+    fprintf(stderr, "-- Control frame information "
+	    "-----------------------------------------------\n");
+    while ((void *)cfp < (void *)(th->stack + th->stack_size)) {
+	control_frame_dump(th, cfp);
+	cfp++;
+    }
+    fprintf(stderr, "\n");
+}
+
+void
+rb_vmdebug_stack_dump_raw_current(void)
+{
+    rb_thread_t *th = GET_THREAD();
+    rb_vmdebug_stack_dump_raw(th, th->cfp);
+}
+
+void
+rb_vmdebug_env_dump_raw(rb_env_t *env, VALUE *ep)
+{
+    int i;
+    fprintf(stderr, "-- env --------------------\n");
+
+    while (env) {
+	fprintf(stderr, "--\n");
+	for (i = 0; i < env->env_size; i++) {
+	    fprintf(stderr, "%04d: %08"PRIxVALUE" (%p)", -env->local_size + i, env->env[i],
+		   (void *)&env->env[i]);
+	    if (&env->env[i] == ep)
+		fprintf(stderr, " <- ep");
+	    fprintf(stderr, "\n");
+	}
+
+	if (env->prev_envval != 0) {
+	    GetEnvPtr(env->prev_envval, env);
+	}
+	else {
+	    env = 0;
+	}
+    }
+    fprintf(stderr, "---------------------------\n");
+}
+
+void
+rb_vmdebug_proc_dump_raw(rb_proc_t *proc)
+{
+    rb_env_t *env;
+    char *selfstr;
+    VALUE val = rb_inspect(proc->block.self);
+    selfstr = StringValueCStr(val);
+
+    fprintf(stderr, "-- proc -------------------\n");
+    fprintf(stderr, "self: %s\n", selfstr);
+    GetEnvPtr(proc->envval, env);
+    rb_vmdebug_env_dump_raw(env, proc->block.ep);
+}
+
+void
+rb_vmdebug_stack_dump_th(VALUE thval)
+{
+    rb_thread_t *th;
+    GetThreadPtr(thval, th);
+    rb_vmdebug_stack_dump_raw(th, th->cfp);
+}
+
+#if VMDEBUG > 2
+
+/* copy from vm.c */
+static VALUE *
+vm_base_ptr(rb_control_frame_t *cfp)
+{
+    rb_control_frame_t *prev_cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
+    VALUE *bp = prev_cfp->sp + cfp->iseq->local_size + 1;
+
+    if (cfp->iseq->type == ISEQ_TYPE_METHOD) {
+	bp += 1;
+    }
+    return bp;
+}
+
+static void
+vm_stack_dump_each(rb_thread_t *th, rb_control_frame_t *cfp)
+{
+    int i;
+
+    VALUE rstr;
+    VALUE *sp = cfp->sp;
+    VALUE *ep = cfp->ep;
+
+    int argc = 0, local_size = 0;
+    const char *name;
+    rb_iseq_t *iseq = cfp->iseq;
+
+    if (iseq == 0) {
+	if (RUBYVM_CFUNC_FRAME_P(cfp)) {
+	    name = rb_id2name(cfp->me->called_id);
+	}
+	else {
+	    name = "?";
+	}
+    }
+    else if (RUBY_VM_IFUNC_P(iseq)) {
+	name = "<ifunc>";
+    }
+    else {
+	argc = iseq->param.lead_num;
+	local_size = iseq->local_size;
+	name = RSTRING_PTR(iseq->location.label);
+    }
+
+    /* stack trace header */
+
+    if (VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_METHOD||
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_TOP   ||
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_BLOCK ||
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_CLASS ||
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_PROC  ||
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_LAMBDA||
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_CFUNC ||
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_IFUNC ||
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_EVAL  ||
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_RESCUE)
+      {
+
+	VALUE *ptr = ep - local_size;
+
+	control_frame_dump(th, cfp);
+
+	for (i = 0; i < argc; i++) {
+	    rstr = rb_inspect(*ptr);
+	    fprintf(stderr, "  arg   %2d: %8s (%p)\n", i, StringValueCStr(rstr),
+		   (void *)ptr++);
+	}
+	for (; i < local_size - 1; i++) {
+	    rstr = rb_inspect(*ptr);
+	    fprintf(stderr, "  local %2d: %8s (%p)\n", i, StringValueCStr(rstr),
+		   (void *)ptr++);
+	}
+
+	ptr = vm_base_ptr(cfp);
+	for (; ptr < sp; ptr++, i++) {
+	    if (*ptr == Qundef) {
+		rstr = rb_str_new2("undef");
+	    }
+	    else {
+		rstr = rb_inspect(*ptr);
+	    }
+	    fprintf(stderr, "  stack %2d: %8s (%"PRIdPTRDIFF")\n", i, StringValueCStr(rstr),
+		    (ptr - th->stack));
+	}
+    }
+    else if (VM_FRAME_TYPE_FINISH_P(cfp)) {
+	if ((th)->stack + (th)->stack_size > (VALUE *)(cfp + 1)) {
+	    vm_stack_dump_each(th, cfp + 1);
+	}
+	else {
+	    /* SDR(); */
+	}
+    }
+    else {
+	rb_bug("unsupport frame type: %08lx", VM_FRAME_TYPE(cfp));
+    }
+}
+#endif
+
+void
+rb_vmdebug_debug_print_register(rb_thread_t *th)
+{
+    rb_control_frame_t *cfp = th->cfp;
+    ptrdiff_t pc = -1;
+    ptrdiff_t ep = cfp->ep - th->stack;
+    ptrdiff_t cfpi;
+
+    if (RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
+	pc = cfp->pc - cfp->iseq->iseq_encoded;
+    }
+
+    if (ep < 0 || (size_t)ep > th->stack_size) {
+	ep = -1;
+    }
+
+    cfpi = ((rb_control_frame_t *)(th->stack + th->stack_size)) - cfp;
+    fprintf(stderr, "  [PC] %04"PRIdPTRDIFF", [SP] %04"PRIdPTRDIFF", [EP] %04"PRIdPTRDIFF", [CFP] %04"PRIdPTRDIFF"\n",
+	    pc, (cfp->sp - th->stack), ep, cfpi);
+}
+
+void
+rb_vmdebug_thread_dump_regs(VALUE thval)
+{
+    rb_thread_t *th;
+    GetThreadPtr(thval, th);
+    rb_vmdebug_debug_print_register(th);
+}
+
+void
+rb_vmdebug_debug_print_pre(rb_thread_t *th, rb_control_frame_t *cfp,VALUE *_pc)
+{
+    rb_iseq_t *iseq = cfp->iseq;
+
+    if (iseq != 0) {
+	ptrdiff_t pc = _pc - iseq->iseq_encoded;
+	int i;
+
+	for (i=0; i<(int)VM_CFP_CNT(th, cfp); i++) {
+	    printf(" ");
+	}
+	printf("| ");
+	if(0)printf("[%03ld] ", (long)(cfp->sp - th->stack));
+
+	/* printf("%3"PRIdPTRDIFF" ", VM_CFP_CNT(th, cfp)); */
+	if (pc >= 0) {
+	    const VALUE *iseq_original = rb_iseq_original_iseq(iseq);
+
+	    rb_iseq_disasm_insn(0, iseq_original, (size_t)pc, iseq, 0);
+	}
+    }
+
+#if VMDEBUG > 3
+    fprintf(stderr, "        (1)");
+    rb_vmdebug_debug_print_register(th);
+#endif
+}
+
+void
+rb_vmdebug_debug_print_post(rb_thread_t *th, rb_control_frame_t *cfp
+#if OPT_STACK_CACHING
+		 , VALUE reg_a, VALUE reg_b
+#endif
+    )
+{
+#if VMDEBUG > 9
+    SDR2(cfp);
+#endif
+
+#if VMDEBUG > 3
+    fprintf(stderr, "        (2)");
+    rb_vmdebug_debug_print_register(th);
+#endif
+    /* stack_dump_raw(th, cfp); */
+
+#if VMDEBUG > 2
+    /* stack_dump_thobj(th); */
+    vm_stack_dump_each(th, th->cfp);
+
+#if OPT_STACK_CACHING
+    {
+	VALUE rstr;
+	rstr = rb_inspect(reg_a);
+	fprintf(stderr, "  sc reg A: %s\n", StringValueCStr(rstr));
+	rstr = rb_inspect(reg_b);
+	fprintf(stderr, "  sc reg B: %s\n", StringValueCStr(rstr));
+    }
+#endif
+    printf
+	("--------------------------------------------------------------\n");
+#endif
+}
+
+VALUE
+rb_vmdebug_thread_dump_state(VALUE self)
+{
+    rb_thread_t *th;
+    rb_control_frame_t *cfp;
+    GetThreadPtr(self, th);
+    cfp = th->cfp;
+
+    fprintf(stderr, "Thread state dump:\n");
+    fprintf(stderr, "pc : %p, sp : %p\n", (void *)cfp->pc, (void *)cfp->sp);
+    fprintf(stderr, "cfp: %p, ep : %p\n", (void *)cfp, (void *)cfp->ep);
+
+    return Qnil;
+}
+
+#if defined(HAVE_BACKTRACE)
+# ifdef HAVE_LIBUNWIND
+#  undef backtrace
+#  define backtrace unw_backtrace
+# elif defined(__APPLE__) && defined(__x86_64__)
+#  define UNW_LOCAL_ONLY
+#  include <libunwind.h>
+#  undef backtrace
+int
+backtrace(void **trace, int size)
+{
+    unw_cursor_t cursor; unw_context_t uc;
+    unw_word_t ip;
+    int n = 0;
+
+    unw_getcontext(&uc);
+    unw_init_local(&cursor, &uc);
+    while (unw_step(&cursor) > 0) {
+	unw_get_reg(&cursor, UNW_REG_IP, &ip);
+	trace[n++] = (void *)ip;
+	{
+	    char buf[256];
+	    unw_get_proc_name(&cursor, buf, 256, &ip);
+	    if (strncmp("_sigtramp", buf, sizeof("_sigtramp")) == 0) {
+		goto darwin_sigtramp;
+	    }
+	}
+    }
+    return n;
+darwin_sigtramp:
+    /* darwin's bundled libunwind doesn't support signal trampoline */
+    {
+	ucontext_t *uctx;
+	/* get _sigtramp's ucontext_t and set values to cursor
+	 * http://www.opensource.apple.com/source/Libc/Libc-825.25/i386/sys/_sigtramp.s
+	 * http://www.opensource.apple.com/source/libunwind/libunwind-35.1/src/unw_getcontext.s
+	 */
+	unw_get_reg(&cursor, UNW_X86_64_RBX, &ip);
+	uctx = (ucontext_t *)ip;
+	unw_set_reg(&cursor, UNW_X86_64_RAX, uctx->uc_mcontext->__ss.__rax);
+	unw_set_reg(&cursor, UNW_X86_64_RBX, uctx->uc_mcontext->__ss.__rbx);
+	unw_set_reg(&cursor, UNW_X86_64_RCX, uctx->uc_mcontext->__ss.__rcx);
+	unw_set_reg(&cursor, UNW_X86_64_RDX, uctx->uc_mcontext->__ss.__rdx);
+	unw_set_reg(&cursor, UNW_X86_64_RDI, uctx->uc_mcontext->__ss.__rdi);
+	unw_set_reg(&cursor, UNW_X86_64_RSI, uctx->uc_mcontext->__ss.__rsi);
+	unw_set_reg(&cursor, UNW_X86_64_RBP, uctx->uc_mcontext->__ss.__rbp);
+	unw_set_reg(&cursor, UNW_X86_64_RSP, 8+(uctx->uc_mcontext->__ss.__rsp));
+	unw_set_reg(&cursor, UNW_X86_64_R8,  uctx->uc_mcontext->__ss.__r8);
+	unw_set_reg(&cursor, UNW_X86_64_R9,  uctx->uc_mcontext->__ss.__r9);
+	unw_set_reg(&cursor, UNW_X86_64_R10, uctx->uc_mcontext->__ss.__r10);
+	unw_set_reg(&cursor, UNW_X86_64_R11, uctx->uc_mcontext->__ss.__r11);
+	unw_set_reg(&cursor, UNW_X86_64_R12, uctx->uc_mcontext->__ss.__r12);
+	unw_set_reg(&cursor, UNW_X86_64_R13, uctx->uc_mcontext->__ss.__r13);
+	unw_set_reg(&cursor, UNW_X86_64_R14, uctx->uc_mcontext->__ss.__r14);
+	unw_set_reg(&cursor, UNW_X86_64_R15, uctx->uc_mcontext->__ss.__r15);
+	ip = *(unw_word_t*)uctx->uc_mcontext->__ss.__rsp;
+	unw_set_reg(&cursor, UNW_REG_IP, ip);
+	trace[n++] = (void *)uctx->uc_mcontext->__ss.__rip;
+	trace[n++] = (void *)ip;
+    }
+    while (unw_step(&cursor) > 0) {
+	unw_get_reg(&cursor, UNW_REG_IP, &ip);
+	trace[n++] = (void *)ip;
+    }
+    return n;
+}
+# elif defined(BROKEN_BACKTRACE)
+#  undef HAVE_BACKTRACE
+#  define HAVE_BACKTRACE 0
+# endif
+#else
+# define HAVE_BACKTRACE 0
+#endif
+
+#if HAVE_BACKTRACE
+# include <execinfo.h>
+#elif defined(_WIN32)
+# include <imagehlp.h>
+# ifndef SYMOPT_DEBUG
+#  define SYMOPT_DEBUG 0x80000000
+# endif
+# ifndef MAX_SYM_NAME
+# define MAX_SYM_NAME 2000
+typedef struct {
+    DWORD64 Offset;
+    WORD Segment;
+    ADDRESS_MODE Mode;
+} ADDRESS64;
+typedef struct {
+    DWORD64 Thread;
+    DWORD ThCallbackStack;
+    DWORD ThCallbackBStore;
+    DWORD NextCallback;
+    DWORD FramePointer;
+    DWORD64 KiCallUserMode;
+    DWORD64 KeUserCallbackDispatcher;
+    DWORD64 SystemRangeStart;
+    DWORD64 KiUserExceptionDispatcher;
+    DWORD64 StackBase;
+    DWORD64 StackLimit;
+    DWORD64 Reserved[5];
+} KDHELP64;
+typedef struct {
+    ADDRESS64 AddrPC;
+    ADDRESS64 AddrReturn;
+    ADDRESS64 AddrFrame;
+    ADDRESS64 AddrStack;
+    ADDRESS64 AddrBStore;
+    void *FuncTableEntry;
+    DWORD64 Params[4];
+    BOOL Far;
+    BOOL Virtual;
+    DWORD64 Reserved[3];
+    KDHELP64 KdHelp;
+} STACKFRAME64;
+typedef struct {
+    ULONG SizeOfStruct;
+    ULONG TypeIndex;
+    ULONG64 Reserved[2];
+    ULONG Index;
+    ULONG Size;
+    ULONG64 ModBase;
+    ULONG Flags;
+    ULONG64 Value;
+    ULONG64 Address;
+    ULONG Register;
+    ULONG Scope;
+    ULONG Tag;
+    ULONG NameLen;
+    ULONG MaxNameLen;
+    char Name[1];
+} SYMBOL_INFO;
+typedef struct {
+    DWORD SizeOfStruct;
+    void *Key;
+    DWORD LineNumber;
+    char *FileName;
+    DWORD64 Address;
+} IMAGEHLP_LINE64;
+typedef void *PREAD_PROCESS_MEMORY_ROUTINE64;
+typedef void *PFUNCTION_TABLE_ACCESS_ROUTINE64;
+typedef void *PGET_MODULE_BASE_ROUTINE64;
+typedef void *PTRANSLATE_ADDRESS_ROUTINE64;
+# endif
+
+static void
+dump_thread(void *arg)
+{
+    HANDLE dbghelp;
+    BOOL (WINAPI *pSymInitialize)(HANDLE, const char *, BOOL);
+    BOOL (WINAPI *pSymCleanup)(HANDLE);
+    BOOL (WINAPI *pStackWalk64)(DWORD, HANDLE, HANDLE, STACKFRAME64 *, void *, PREAD_PROCESS_MEMORY_ROUTINE64, PFUNCTION_TABLE_ACCESS_ROUTINE64, PGET_MODULE_BASE_ROUTINE64, PTRANSLATE_ADDRESS_ROUTINE64);
+    DWORD64 (WINAPI *pSymGetModuleBase64)(HANDLE, DWORD64);
+    BOOL (WINAPI *pSymFromAddr)(HANDLE, DWORD64, DWORD64 *, SYMBOL_INFO *);
+    BOOL (WINAPI *pSymGetLineFromAddr64)(HANDLE, DWORD64, DWORD *, IMAGEHLP_LINE64 *);
+    HANDLE (WINAPI *pOpenThread)(DWORD, BOOL, DWORD);
+    DWORD tid = *(DWORD *)arg;
+    HANDLE ph;
+    HANDLE th;
+
+    dbghelp = LoadLibrary("dbghelp.dll");
+    if (!dbghelp) return;
+    pSymInitialize = (BOOL (WINAPI *)(HANDLE, const char *, BOOL))GetProcAddress(dbghelp, "SymInitialize");
+    pSymCleanup = (BOOL (WINAPI *)(HANDLE))GetProcAddress(dbghelp, "SymCleanup");
+    pStackWalk64 = (BOOL (WINAPI *)(DWORD, HANDLE, HANDLE, STACKFRAME64 *, void *, PREAD_PROCESS_MEMORY_ROUTINE64, PFUNCTION_TABLE_ACCESS_ROUTINE64, PGET_MODULE_BASE_ROUTINE64, PTRANSLATE_ADDRESS_ROUTINE64))GetProcAddress(dbghelp, "StackWalk64");
+    pSymGetModuleBase64 = (DWORD64 (WINAPI *)(HANDLE, DWORD64))GetProcAddress(dbghelp, "SymGetModuleBase64");
+    pSymFromAddr = (BOOL (WINAPI *)(HANDLE, DWORD64, DWORD64 *, SYMBOL_INFO *))GetProcAddress(dbghelp, "SymFromAddr");
+    pSymGetLineFromAddr64 = (BOOL (WINAPI *)(HANDLE, DWORD64, DWORD *, IMAGEHLP_LINE64 *))GetProcAddress(dbghelp, "SymGetLineFromAddr64");
+    pOpenThread = (HANDLE (WINAPI *)(DWORD, BOOL, DWORD))GetProcAddress(GetModuleHandle("kernel32.dll"), "OpenThread");
+    if (pSymInitialize && pSymCleanup && pStackWalk64 && pSymGetModuleBase64 &&
+	pSymFromAddr && pSymGetLineFromAddr64 && pOpenThread) {
+	SymSetOptions(SYMOPT_UNDNAME | SYMOPT_DEFERRED_LOADS | SYMOPT_DEBUG | SYMOPT_LOAD_LINES);
+	ph = GetCurrentProcess();
+	pSymInitialize(ph, NULL, TRUE);
+	th = pOpenThread(THREAD_SUSPEND_RESUME|THREAD_GET_CONTEXT, FALSE, tid);
+	if (th) {
+	    if (SuspendThread(th) != (DWORD)-1) {
+		CONTEXT context;
+		memset(&context, 0, sizeof(context));
+		context.ContextFlags = CONTEXT_FULL;
+		if (GetThreadContext(th, &context)) {
+		    char libpath[MAX_PATH];
+		    char buf[sizeof(SYMBOL_INFO) + MAX_SYM_NAME];
+		    SYMBOL_INFO *info = (SYMBOL_INFO *)buf;
+		    DWORD mac;
+		    STACKFRAME64 frame;
+		    memset(&frame, 0, sizeof(frame));
+#if defined(_M_AMD64) || defined(__x86_64__)
+		    mac = IMAGE_FILE_MACHINE_AMD64;
+		    frame.AddrPC.Mode = AddrModeFlat;
+		    frame.AddrPC.Offset = context.Rip;
+		    frame.AddrFrame.Mode = AddrModeFlat;
+		    frame.AddrFrame.Offset = context.Rbp;
+		    frame.AddrStack.Mode = AddrModeFlat;
+		    frame.AddrStack.Offset = context.Rsp;
+#elif defined(_M_IA64) || defined(__ia64__)
+		    mac = IMAGE_FILE_MACHINE_IA64;
+		    frame.AddrPC.Mode = AddrModeFlat;
+		    frame.AddrPC.Offset = context.StIIP;
+		    frame.AddrBStore.Mode = AddrModeFlat;
+		    frame.AddrBStore.Offset = context.RsBSP;
+		    frame.AddrStack.Mode = AddrModeFlat;
+		    frame.AddrStack.Offset = context.IntSp;
+#else	/* i386 */
+		    mac = IMAGE_FILE_MACHINE_I386;
+		    frame.AddrPC.Mode = AddrModeFlat;
+		    frame.AddrPC.Offset = context.Eip;
+		    frame.AddrFrame.Mode = AddrModeFlat;
+		    frame.AddrFrame.Offset = context.Ebp;
+		    frame.AddrStack.Mode = AddrModeFlat;
+		    frame.AddrStack.Offset = context.Esp;
+#endif
+
+		    while (pStackWalk64(mac, ph, th, &frame, &context, NULL,
+					NULL, NULL, NULL)) {
+			DWORD64 addr = frame.AddrPC.Offset;
+			IMAGEHLP_LINE64 line;
+			DWORD64 displacement;
+			DWORD tmp;
+
+			if (addr == frame.AddrReturn.Offset || addr == 0 ||
+			    frame.AddrReturn.Offset == 0)
+			    break;
+
+			memset(buf, 0, sizeof(buf));
+			info->SizeOfStruct = sizeof(SYMBOL_INFO);
+			info->MaxNameLen = MAX_SYM_NAME;
+			if (pSymFromAddr(ph, addr, &displacement, info)) {
+			    if (GetModuleFileName((HANDLE)(uintptr_t)pSymGetModuleBase64(ph, addr), libpath, sizeof(libpath)))
+				fprintf(stderr, "%s", libpath);
+			    fprintf(stderr, "(%s+0x%I64x)",
+				    info->Name, displacement);
+			}
+			fprintf(stderr, " [0x%p]", (void *)(VALUE)addr);
+			memset(&line, 0, sizeof(line));
+			line.SizeOfStruct = sizeof(line);
+			if (pSymGetLineFromAddr64(ph, addr, &tmp, &line))
+			    fprintf(stderr, " %s:%lu", line.FileName, line.LineNumber);
+			fprintf(stderr, "\n");
+		    }
+		}
+
+		ResumeThread(th);
+	    }
+	    CloseHandle(th);
+	}
+	pSymCleanup(ph);
+    }
+    FreeLibrary(dbghelp);
+}
+#endif
+
+void
+rb_print_backtrace(void)
+{
+#if HAVE_BACKTRACE
+#define MAX_NATIVE_TRACE 1024
+    static void *trace[MAX_NATIVE_TRACE];
+    int n = backtrace(trace, MAX_NATIVE_TRACE);
+#if defined(USE_ELF) && defined(HAVE_DLADDR)
+    rb_dump_backtrace_with_lines(n, trace);
+#else
+    char **syms = backtrace_symbols(trace, n);
+    if (syms) {
+	int i;
+	for (i=0; i<n; i++) {
+	    fprintf(stderr, "%s\n", syms[i]);
+	}
+	free(syms);
+    }
+#endif
+#elif defined(_WIN32)
+    DWORD tid = GetCurrentThreadId();
+    HANDLE th = (HANDLE)_beginthread(dump_thread, 0, &tid);
+    if (th != (HANDLE)-1)
+	WaitForSingleObject(th, INFINITE);
+#endif
+}
+
+#ifdef HAVE_LIBPROCSTAT
+#include <sys/user.h>
+#include <sys/sysctl.h>
+#include <sys/param.h>
+#include <libprocstat.h>
+# ifndef KVME_TYPE_MGTDEVICE
+# define KVME_TYPE_MGTDEVICE     8
+# endif
+void
+procstat_vm(struct procstat *procstat, struct kinfo_proc *kipp)
+{
+	struct kinfo_vmentry *freep, *kve;
+	int ptrwidth;
+	unsigned int i, cnt;
+	const char *str;
+#ifdef __x86_64__
+	ptrwidth = 14;
+#else
+	ptrwidth = 2*sizeof(void *) + 2;
+#endif
+	fprintf(stderr, "%*s %*s %3s %4s %4s %3s %3s %4s %-2s %-s\n",
+		ptrwidth, "START", ptrwidth, "END", "PRT", "RES",
+		"PRES", "REF", "SHD", "FL", "TP", "PATH");
+
+#ifdef HAVE_PROCSTAT_GETVMMAP
+	freep = procstat_getvmmap(procstat, kipp, &cnt);
+#else
+	freep = kinfo_getvmmap(kipp->ki_pid, &cnt);
+#endif
+	if (freep == NULL)
+		return;
+	for (i = 0; i < cnt; i++) {
+		kve = &freep[i];
+		fprintf(stderr, "%#*jx ", ptrwidth, (uintmax_t)kve->kve_start);
+		fprintf(stderr, "%#*jx ", ptrwidth, (uintmax_t)kve->kve_end);
+		fprintf(stderr, "%s", kve->kve_protection & KVME_PROT_READ ? "r" : "-");
+		fprintf(stderr, "%s", kve->kve_protection & KVME_PROT_WRITE ? "w" : "-");
+		fprintf(stderr, "%s ", kve->kve_protection & KVME_PROT_EXEC ? "x" : "-");
+		fprintf(stderr, "%4d ", kve->kve_resident);
+		fprintf(stderr, "%4d ", kve->kve_private_resident);
+		fprintf(stderr, "%3d ", kve->kve_ref_count);
+		fprintf(stderr, "%3d ", kve->kve_shadow_count);
+		fprintf(stderr, "%-1s", kve->kve_flags & KVME_FLAG_COW ? "C" : "-");
+		fprintf(stderr, "%-1s", kve->kve_flags & KVME_FLAG_NEEDS_COPY ? "N" :
+		    "-");
+		fprintf(stderr, "%-1s", kve->kve_flags & KVME_FLAG_SUPER ? "S" : "-");
+		fprintf(stderr, "%-1s ", kve->kve_flags & KVME_FLAG_GROWS_UP ? "U" :
+		    kve->kve_flags & KVME_FLAG_GROWS_DOWN ? "D" : "-");
+		switch (kve->kve_type) {
+		case KVME_TYPE_NONE:
+			str = "--";
+			break;
+		case KVME_TYPE_DEFAULT:
+			str = "df";
+			break;
+		case KVME_TYPE_VNODE:
+			str = "vn";
+			break;
+		case KVME_TYPE_SWAP:
+			str = "sw";
+			break;
+		case KVME_TYPE_DEVICE:
+			str = "dv";
+			break;
+		case KVME_TYPE_PHYS:
+			str = "ph";
+			break;
+		case KVME_TYPE_DEAD:
+			str = "dd";
+			break;
+		case KVME_TYPE_SG:
+			str = "sg";
+			break;
+		case KVME_TYPE_MGTDEVICE:
+			str = "md";
+			break;
+		case KVME_TYPE_UNKNOWN:
+		default:
+			str = "??";
+			break;
+		}
+		fprintf(stderr, "%-2s ", str);
+		fprintf(stderr, "%-s\n", kve->kve_path);
+	}
+	free(freep);
+}
+#endif
+
+#if defined __linux__
+# if defined __x86_64__ || defined __i386__
+#  define HAVE_PRINT_MACHINE_REGISTERS 1
+# endif
+#elif defined __APPLE__
+# if defined __x86_64__ || defined __i386__
+#  define HAVE_PRINT_MACHINE_REGISTERS 1
+# endif
+#endif
+
+#ifdef HAVE_PRINT_MACHINE_REGISTERS
+static int
+print_machine_register(size_t reg, const char *reg_name, int col_count, int max_col)
+{
+    int ret;
+    char buf[64];
+
+#ifdef __LP64__
+    ret = snprintf(buf, sizeof(buf), " %3.3s: 0x%016zx", reg_name, reg);
+#else
+    ret = snprintf(buf, sizeof(buf), " %3.3s: 0x%08zx", reg_name, reg);
+#endif
+    if (col_count + ret > max_col) {
+	fputs("\n", stderr);
+	col_count = 0;
+    }
+    col_count += ret;
+    fputs(buf, stderr);
+    return col_count;
+}
+# ifdef __linux__
+#   define dump_machine_register(reg) (col_count = print_machine_register(mctx->gregs[REG_##reg], #reg, col_count, 80))
+# elif defined __APPLE__
+#   define dump_machine_register(reg) (col_count = print_machine_register(mctx->__ss.__##reg, #reg, col_count, 80))
+# endif
+
+static void
+rb_dump_machine_register(const ucontext_t *ctx)
+{
+    int col_count = 0;
+    if (!ctx) return;
+
+    fprintf(stderr, "-- Machine register context "
+	    "------------------------------------------------\n");
+
+# if defined __linux__
+    {
+	const mcontext_t *const mctx = &ctx->uc_mcontext;
+#   if defined __x86_64__
+	dump_machine_register(RIP);
+	dump_machine_register(RBP);
+	dump_machine_register(RSP);
+	dump_machine_register(RAX);
+	dump_machine_register(RBX);
+	dump_machine_register(RCX);
+	dump_machine_register(RDX);
+	dump_machine_register(RDI);
+	dump_machine_register(RSI);
+	dump_machine_register(R8);
+	dump_machine_register(R9);
+	dump_machine_register(R10);
+	dump_machine_register(R11);
+	dump_machine_register(R12);
+	dump_machine_register(R13);
+	dump_machine_register(R14);
+	dump_machine_register(R15);
+	dump_machine_register(EFL);
+#   elif defined __i386__
+	dump_machine_register(GS);
+	dump_machine_register(FS);
+	dump_machine_register(ES);
+	dump_machine_register(DS);
+	dump_machine_register(EDI);
+	dump_machine_register(ESI);
+	dump_machine_register(EBP);
+	dump_machine_register(ESP);
+	dump_machine_register(EBX);
+	dump_machine_register(EDX);
+	dump_machine_register(ECX);
+	dump_machine_register(EAX);
+	dump_machine_register(TRAPNO);
+	dump_machine_register(ERR);
+	dump_machine_register(EIP);
+	dump_machine_register(CS);
+	dump_machine_register(EFL);
+	dump_machine_register(UESP);
+	dump_machine_register(SS);
+#   endif
+    }
+# elif defined __APPLE__
+    {
+	const mcontext_t mctx = ctx->uc_mcontext;
+#   if defined __x86_64__
+	dump_machine_register(rax);
+	dump_machine_register(rbx);
+	dump_machine_register(rcx);
+	dump_machine_register(rdx);
+	dump_machine_register(rdi);
+	dump_machine_register(rsi);
+	dump_machine_register(rbp);
+	dump_machine_register(rsp);
+	dump_machine_register(r8);
+	dump_machine_register(r9);
+	dump_machine_register(r10);
+	dump_machine_register(r11);
+	dump_machine_register(r12);
+	dump_machine_register(r13);
+	dump_machine_register(r14);
+	dump_machine_register(r15);
+	dump_machine_register(rip);
+	dump_machine_register(rflags);
+#   elif defined __i386__
+	dump_machine_register(eax);
+	dump_machine_register(ebx);
+	dump_machine_register(ecx);
+	dump_machine_register(edx);
+	dump_machine_register(edi);
+	dump_machine_register(esi);
+	dump_machine_register(ebp);
+	dump_machine_register(esp);
+	dump_machine_register(ss);
+	dump_machine_register(eflags);
+	dump_machine_register(eip);
+	dump_machine_register(cs);
+	dump_machine_register(ds);
+	dump_machine_register(es);
+	dump_machine_register(fs);
+	dump_machine_register(gs);
+#   endif
+    }
+# endif
+    fprintf(stderr, "\n\n");
+}
+#else
+# define rb_dump_machine_register(ctx) ((void)0)
+#endif /* HAVE_PRINT_MACHINE_REGISTERS */
+
+void
+rb_vm_bugreport(const void *ctx)
+{
+#ifdef __linux__
+# define PROC_MAPS_NAME "/proc/self/maps"
+#endif
+#ifdef PROC_MAPS_NAME
+    enum {other_runtime_info = 1};
+#else
+    enum {other_runtime_info = 0};
+#endif
+    const rb_vm_t *const vm = GET_VM();
+
+#if defined __APPLE__
+    fputs("-- Crash Report log information "
+	  "--------------------------------------------\n"
+	  "   See Crash Report log file under the one of following:\n"
+	  "     * ~/Library/Logs/CrashReporter\n"
+	  "     * /Library/Logs/CrashReporter\n"
+	  "     * ~/Library/Logs/DiagnosticReports\n"
+	  "     * /Library/Logs/DiagnosticReports\n"
+	  "   for more details.\n"
+	  "\n",
+	  stderr);
+#endif
+    if (vm) {
+	SDR();
+	rb_backtrace_print_as_bugreport();
+	fputs("\n", stderr);
+    }
+
+    rb_dump_machine_register(ctx);
+
+#if HAVE_BACKTRACE || defined(_WIN32)
+    fprintf(stderr, "-- C level backtrace information "
+	    "-------------------------------------------\n");
+    rb_print_backtrace();
+
+
+    fprintf(stderr, "\n");
+#endif /* HAVE_BACKTRACE */
+
+    if (other_runtime_info || vm) {
+	fprintf(stderr, "-- Other runtime information "
+		"-----------------------------------------------\n\n");
+    }
+    if (vm) {
+	int i;
+	VALUE name;
+	long len;
+	const int max_name_length = 1024;
+# define LIMITED_NAME_LENGTH(s) \
+	(((len = RSTRING_LEN(s)) > max_name_length) ? max_name_length : (int)len)
+
+	name = vm->progname;
+	fprintf(stderr, "* Loaded script: %.*s\n",
+		LIMITED_NAME_LENGTH(name), RSTRING_PTR(name));
+	fprintf(stderr, "\n");
+	fprintf(stderr, "* Loaded features:\n\n");
+	for (i=0; i<RARRAY_LEN(vm->loaded_features); i++) {
+	    name = RARRAY_AREF(vm->loaded_features, i);
+	    if (RB_TYPE_P(name, T_STRING)) {
+		fprintf(stderr, " %4d %.*s\n", i,
+			LIMITED_NAME_LENGTH(name), RSTRING_PTR(name));
+	    }
+	    else if (RB_TYPE_P(name, T_CLASS) || RB_TYPE_P(name, T_MODULE)) {
+		const char *const type = RB_TYPE_P(name, T_CLASS) ?
+		    "class" : "module";
+		name = rb_class_name(name);
+		fprintf(stderr, " %4d %s:%.*s\n", i, type,
+			LIMITED_NAME_LENGTH(name), RSTRING_PTR(name));
+	    }
+	    else {
+		VALUE klass = rb_class_name(CLASS_OF(name));
+		fprintf(stderr, " %4d #<%.*s:%p>\n", i,
+			LIMITED_NAME_LENGTH(klass), RSTRING_PTR(klass),
+			(void *)name);
+	    }
+	}
+	fprintf(stderr, "\n");
+    }
+
+    {
+#ifdef PROC_MAPS_NAME
+	{
+	    FILE *fp = fopen(PROC_MAPS_NAME, "r");
+	    if (fp) {
+		fprintf(stderr, "* Process memory map:\n\n");
+
+		while (!feof(fp)) {
+		    char buff[0x100];
+		    size_t rn = fread(buff, 1, 0x100, fp);
+		    if (fwrite(buff, 1, rn, stderr) != rn)
+			break;
+		}
+
+		fclose(fp);
+		fprintf(stderr, "\n\n");
+	    }
+	}
+#endif /* __linux__ */
+#ifdef HAVE_LIBPROCSTAT
+# define MIB_KERN_PROC_PID_LEN 4
+	int mib[MIB_KERN_PROC_PID_LEN];
+	struct kinfo_proc kp;
+	size_t len = sizeof(struct kinfo_proc);
+	mib[0] = CTL_KERN;
+	mib[1] = KERN_PROC;
+	mib[2] = KERN_PROC_PID;
+	mib[3] = getpid();
+	if (sysctl(mib, MIB_KERN_PROC_PID_LEN, &kp, &len, NULL, 0) == -1) {
+	    perror("sysctl");
+	}
+	else {
+	    struct procstat *prstat = procstat_open_sysctl();
+	    fprintf(stderr, "* Process memory map:\n\n");
+	    procstat_vm(prstat, &kp);
+	    procstat_close(prstat);
+	    fprintf(stderr, "\n");
+	}
+#endif /* __FreeBSD__ */
+    }
+}