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b48a267b8f
SSE registers are used for passing parameters and must be preserved in runtime relocations. This is inside ld.so enforced through the tests in tst-xmmymm.sh. But the malloc routines used after startup come from libc.so and can be arbitrarily complex. It's overkill to save the SSE registers all the time because of that. These calls are rare. Instead we save them on demand. The new infrastructure put in place in this patch makes this possible and efficient.
130 lines
2.7 KiB
C
130 lines
2.7 KiB
C
#undef _GNU_SOURCE
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#define _XOPEN_SOURCE 600
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#undef _LIBC
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/* The following macro definitions are a hack. They word around disabling
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the GNU extension while still using a few internal headers. */
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#define u_char unsigned char
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#define u_short unsigned short
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#define u_int unsigned int
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#define u_long unsigned long
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wchar.h>
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#define FAIL() \
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do { \
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result = 1; \
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printf ("test at line %d failed\n", __LINE__); \
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} while (0)
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static int
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xsscanf (const char *str, const char *fmt, ...)
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{
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va_list ap;
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va_start (ap, fmt);
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int ret = vsscanf (str, fmt, ap);
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va_end (ap);
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return ret;
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}
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static int
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xscanf (const char *fmt, ...)
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{
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va_list ap;
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va_start (ap, fmt);
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int ret = vscanf (fmt, ap);
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va_end (ap);
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return ret;
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}
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static int
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xfscanf (FILE *f, const char *fmt, ...)
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{
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va_list ap;
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va_start (ap, fmt);
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int ret = vfscanf (f, fmt, ap);
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va_end (ap);
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return ret;
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}
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int
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main (void)
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{
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float f;
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double d;
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char c[8];
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int result = 0;
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if (xsscanf (" 0.25s x", "%e%3c", &f, c) != 2)
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FAIL ();
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else if (f != 0.25 || memcmp (c, "s x", 3) != 0)
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FAIL ();
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if (xsscanf (" 1.25s x", "%as%2c", &f, c) != 2)
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FAIL ();
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else if (f != 1.25 || memcmp (c, " x", 2) != 0)
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FAIL ();
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if (xsscanf (" 2.25s x", "%las%2c", &d, c) != 2)
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FAIL ();
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else if (d != 2.25 || memcmp (c, " x", 2) != 0)
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FAIL ();
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if (xsscanf (" 3.25S x", "%4aS%2c", &f, c) != 2)
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FAIL ();
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else if (f != 3.25 || memcmp (c, " x", 2) != 0)
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FAIL ();
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if (xsscanf (" 4.25[0-9.] x", "%a[0-9.]%2c", &f, c) != 2)
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FAIL ();
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else if (f != 4.25 || memcmp (c, " x", 2) != 0)
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FAIL ();
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if (xsscanf (" 5.25[0-9.] x", "%la[0-9.]%2c", &d, c) != 2)
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FAIL ();
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else if (d != 5.25 || memcmp (c, " x", 2) != 0)
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FAIL ();
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const char *tmpdir = getenv ("TMPDIR");
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if (tmpdir == NULL || tmpdir[0] == '\0')
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tmpdir = "/tmp";
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char fname[strlen (tmpdir) + sizeof "/tst-scanf17.XXXXXX"];
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sprintf (fname, "%s/tst-scanf17.XXXXXX", tmpdir);
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if (fname == NULL)
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FAIL ();
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/* Create a temporary file. */
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int fd = mkstemp (fname);
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if (fd == -1)
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FAIL ();
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FILE *fp = fdopen (fd, "w+");
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if (fp == NULL)
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FAIL ();
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else
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{
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if (fputs (" 1.25s x", fp) == EOF)
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FAIL ();
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if (fseek (fp, 0, SEEK_SET) != 0)
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FAIL ();
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if (xfscanf (fp, "%as%2c", &f, c) != 2)
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FAIL ();
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else if (f != 1.25 || memcmp (c, " x", 2) != 0)
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FAIL ();
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if (freopen (fname, "r", stdin) == NULL)
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FAIL ();
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else
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{
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if (xscanf ("%as%2c", &f, c) != 2)
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FAIL ();
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else if (f != 1.25 || memcmp (c, " x", 2) != 0)
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FAIL ();
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}
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fclose (fp);
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}
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remove (fname);
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return result;
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}
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