merge revision(s) 54737,54740,55792: [Backport #14623]

	Support MSVC14 and 15 [Bug #11118]

	Search _pioinfo which is not exported after MSVC14.
	[Bug #12014] [GH-884]

	win32.c: suppress warnings

	* win32/win32.c (set_pioinfo_extra): remove "/*" within comment.
	* win32/win32.c (set_pioinfo_extra): use more reliable way to search
	  the position of pioinfo of VC14, and also support debug library of it.
	  patched by davispuh AT gmail.com
	  [ruby-core:76644] [Bug #12644]
	  this fixes also [Bug #12631]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@62884 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 89 insertions, 2 deletions

diff --git a/win32/mkexports.rb b/win32/mkexports.rb
index c3514f13ab..d26acbb107 100755
--- a/win32/mkexports.rb
+++ b/win32/mkexports.rb
@@ -114,6 +114,7 @@ class Exports::Mswin < Exports
         when /OBJECT/, /LIBRARY/
           next if /^[[:xdigit:]]+ 0+ UNDEF / =~ l
           next unless /External/ =~ l
+          next if /(?:_local_stdio_printf_options|v(f|sn?)printf_l)\Z/ =~ l
           next unless l.sub!(/.*?\s(\(\)\s+)?External\s+\|\s+/, '')
           is_data = !$1
           if noprefix or /^[@_]/ =~ l
diff --git a/win32/win32.c b/win32/win32.c
index 3f189b3a6c..9c25c939f1 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -2320,6 +2320,24 @@ typedef struct {
 #endif
 
 /* License: Ruby's */
+#if RUBY_MSVCRT_VERSION >= 140
+typedef char lowio_text_mode;
+typedef char lowio_pipe_lookahead[3];
+
+typedef struct {
+    CRITICAL_SECTION           lock;
+    intptr_t                   osfhnd;          // underlying OS file HANDLE
+    __int64                    startpos;        // File position that matches buffer start
+    unsigned char              osfile;          // Attributes of file (e.g., open in text mode?)
+    lowio_text_mode            textmode;
+    lowio_pipe_lookahead       _pipe_lookahead;
+
+    uint8_t unicode          : 1; // Was the file opened as unicode?
+    uint8_t utf8translations : 1; // Buffer contains translations other than CRLF
+    uint8_t dbcsBufferUsed   : 1; // Is the dbcsBuffer in use?
+    char    dbcsBuffer;           // Buffer for the lead byte of DBCS when converting from DBCS to Unicode
+} ioinfo;
+#else
 typedef struct	{
     intptr_t osfhnd;	/* underlying OS file HANDLE */
     char osfile;	/* attributes of file (e.g., open in text mode?) */
@@ -2331,20 +2349,25 @@ typedef struct	{
     char pipech2[2];
 #endif
 }	ioinfo;
+#endif
 
 #if !defined _CRTIMP || defined __MINGW32__
 #undef _CRTIMP
 #define _CRTIMP __declspec(dllimport)
 #endif
 
+#if RUBY_MSVCRT_VERSION >= 140
+static ioinfo ** __pioinfo = NULL;
+#define IOINFO_L2E 6
+#else
 EXTERN_C _CRTIMP ioinfo * __pioinfo[];
+#define IOINFO_L2E 5
+#endif
 static inline ioinfo* _pioinfo(int);
 
-#define IOINFO_L2E			5
 #define IOINFO_ARRAY_ELTS	(1 << IOINFO_L2E)
 #define _osfhnd(i)  (_pioinfo(i)->osfhnd)
 #define _osfile(i)  (_pioinfo(i)->osfile)
-#define _pipech(i)  (_pioinfo(i)->pipech)
 #define rb_acrt_lowio_lock_fh(i)   EnterCriticalSection(&_pioinfo(i)->lock)
 #define rb_acrt_lowio_unlock_fh(i) LeaveCriticalSection(&_pioinfo(i)->lock)
 
@@ -2355,6 +2378,68 @@ static size_t pioinfo_extra = 0;	/* workaround for VC++8 SP1 */
 static void
 set_pioinfo_extra(void)
 {
+#if RUBY_MSVCRT_VERSION >= 140
+# define FUNCTION_RET 0xc3 /* ret */
+# ifdef _DEBUG
+#  define UCRTBASE "ucrtbased.dll"
+# else
+#  define UCRTBASE "ucrtbase.dll"
+# endif
+    /* get __pioinfo addr with _isatty */
+    char *p = (char*)get_proc_address(UCRTBASE, "_isatty", NULL);
+    char *pend = p;
+    /* _osfile(fh) & FDEV */
+
+# if _WIN64
+    int32_t rel;
+    char *rip;
+    /* add rsp, _ */
+#  define FUNCTION_BEFORE_RET_MARK "\x48\x83\xc4"
+#  define FUNCTION_SKIP_BYTES 1
+#  ifdef _DEBUG
+    /* lea rcx,[__pioinfo's addr in RIP-relative 32bit addr] */
+#   define PIOINFO_MARK "\x48\x8d\x0d"
+#  else
+    /* lea rdx,[__pioinfo's addr in RIP-relative 32bit addr] */
+#   define PIOINFO_MARK "\x48\x8d\x15"
+#  endif
+
+# else /* x86 */
+    /* pop ebp */
+#  define FUNCTION_BEFORE_RET_MARK "\x5d"
+#  define FUNCTION_SKIP_BYTES 0
+    /* mov eax,dword ptr [eax*4+100EB430h] */
+#  define PIOINFO_MARK "\x8B\x04\x85"
+# endif
+    if (p) {
+        for (pend += 10; pend < p + 300; pend++) {
+            // find end of function
+            if (memcmp(pend, FUNCTION_BEFORE_RET_MARK, sizeof(FUNCTION_BEFORE_RET_MARK) - 1) == 0 &&
+                *(pend + (sizeof(FUNCTION_BEFORE_RET_MARK) - 1) + FUNCTION_SKIP_BYTES) & FUNCTION_RET == FUNCTION_RET) {
+                // search backwards from end of function
+                for (pend -= (sizeof(PIOINFO_MARK) - 1); pend > p; pend--) {
+                    if (memcmp(pend, PIOINFO_MARK, sizeof(PIOINFO_MARK) - 1) == 0) {
+                        p = pend;
+                        goto found;
+                    }
+                }
+                break;
+            }
+        }
+    }
+    fprintf(stderr, "unexpected " UCRTBASE "\n");
+    _exit(1);
+
+    found:
+    p += sizeof(PIOINFO_MARK) - 1;
+#if _WIN64
+    rel = *(int32_t*)(p);
+    rip = p + sizeof(int32_t);
+    __pioinfo = (ioinfo**)(rip + rel);
+#else
+    __pioinfo = *(ioinfo***)(p);
+#endif
+#else
     int fd;
 
     fd = _open("NUL", O_RDONLY);
@@ -2369,6 +2454,7 @@ set_pioinfo_extra(void)
 	/* not found, maybe something wrong... */
 	pioinfo_extra = 0;
     }
+#endif
 }
 #else
 #define pioinfo_extra 0