diff --git a/tests/test-flush-cache.c b/tests/test-flush-cache.c
index e69de29b..180b5c2e 100644
--- a/tests/test-flush-cache.c
+++ b/tests/test-flush-cache.c
@@ -0,0 +1,151 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003 Hewlett-Packard Co
+	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+
+This file is part of libunwind.
+
+Copyright (c) 2003 Hewlett-Packard Co.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#if HAVE_EXECINFO_H
+# include <execinfo.h>
+#else
+  extern int backtrace (void **, int);
+#endif
+#include <stdio.h>
+#include <string.h>
+
+#define UNW_LOCAL_ONLY	/* must define this for consistency with backtrace() */
+#include <libunwind.h>
+
+int verbose;
+
+int
+f257 (void)
+{
+  void *buffer[300];
+  int i, n;
+
+  if (verbose)
+    printf ("First backtrace:\n");
+  n = backtrace (buffer, 300);
+  if (verbose)
+    for (i = 0; i < n; ++i)
+      printf ("[%d] ip=%p\n", i, buffer[i]);
+
+  unw_flush_cache (unw_local_addr_space, 0, 0);
+
+  if (verbose)
+    printf ("\nSecond backtrace:\n");
+  n = backtrace (buffer, 300);
+  if (verbose)
+    for (i = 0; i < n; ++i)
+      printf ("[%d] ip=%p\n", i, buffer[i]);
+  return 0;
+}
+
+#define F(n,m)					\
+int						\
+f##n (void)					\
+{						\
+  return f##m ();				\
+}
+
+/* Here, we rely on the fact that the script-cache's hash-table is 256
+   entries big.  With 257 functions, we're guaranteed to get at least
+   one hash-collision.  */
+F(256,257)	F(255,256)	F(254,255)	F(253,254)
+F(252,253)	F(251,252)	F(250,251)	F(249,250)
+F(248,249)	F(247,248)	F(246,247)	F(245,246)
+F(244,245)	F(243,244)	F(242,243)	F(241,242)
+F(240,241)	F(239,240)	F(238,239)	F(237,238)
+F(236,237)	F(235,236)	F(234,235)	F(233,234)
+F(232,233)	F(231,232)	F(230,231)	F(229,230)
+F(228,229)	F(227,228)	F(226,227)	F(225,226)
+F(224,225)	F(223,224)	F(222,223)	F(221,222)
+F(220,221)	F(219,220)	F(218,219)	F(217,218)
+F(216,217)	F(215,216)	F(214,215)	F(213,214)
+F(212,213)	F(211,212)	F(210,211)	F(209,210)
+F(208,209)	F(207,208)	F(206,207)	F(205,206)
+F(204,205)	F(203,204)	F(202,203)	F(201,202)
+F(200,201)	F(199,200)	F(198,199)	F(197,198)
+F(196,197)	F(195,196)	F(194,195)	F(193,194)
+F(192,193)	F(191,192)	F(190,191)	F(189,190)
+F(188,189)	F(187,188)	F(186,187)	F(185,186)
+F(184,185)	F(183,184)	F(182,183)	F(181,182)
+F(180,181)	F(179,180)	F(178,179)	F(177,178)
+F(176,177)	F(175,176)	F(174,175)	F(173,174)
+F(172,173)	F(171,172)	F(170,171)	F(169,170)
+F(168,169)	F(167,168)	F(166,167)	F(165,166)
+F(164,165)	F(163,164)	F(162,163)	F(161,162)
+F(160,161)	F(159,160)	F(158,159)	F(157,158)
+F(156,157)	F(155,156)	F(154,155)	F(153,154)
+F(152,153)	F(151,152)	F(150,151)	F(149,150)
+F(148,149)	F(147,148)	F(146,147)	F(145,146)
+F(144,145)	F(143,144)	F(142,143)	F(141,142)
+F(140,141)	F(139,140)	F(138,139)	F(137,138)
+F(136,137)	F(135,136)	F(134,135)	F(133,134)
+F(132,133)	F(131,132)	F(130,131)	F(129,130)
+F(128,129)	F(127,128)	F(126,127)	F(125,126)
+F(124,125)	F(123,124)	F(122,123)	F(121,122)
+F(120,121)	F(119,120)	F(118,119)	F(117,118)
+F(116,117)	F(115,116)	F(114,115)	F(113,114)
+F(112,113)	F(111,112)	F(110,111)	F(109,110)
+F(108,109)	F(107,108)	F(106,107)	F(105,106)
+F(104,105)	F(103,104)	F(102,103)	F(101,102)
+F(100,101)	F(99,100)	F(98,99)	F(97,98)
+F(96,97)	F(95,96)	F(94,95)	F(93,94)
+F(92,93)	F(91,92)	F(90,91)	F(89,90)
+F(88,89)	F(87,88)	F(86,87)	F(85,86)
+F(84,85)	F(83,84)	F(82,83)	F(81,82)
+F(80,81)	F(79,80)	F(78,79)	F(77,78)
+F(76,77)	F(75,76)	F(74,75)	F(73,74)
+F(72,73)	F(71,72)	F(70,71)	F(69,70)
+F(68,69)	F(67,68)	F(66,67)	F(65,66)
+F(64,65)	F(63,64)	F(62,63)	F(61,62)
+F(60,61)	F(59,60)	F(58,59)	F(57,58)
+F(56,57)	F(55,56)	F(54,55)	F(53,54)
+F(52,53)	F(51,52)	F(50,51)	F(49,50)
+F(48,49)	F(47,48)	F(46,47)	F(45,46)
+F(44,45)	F(43,44)	F(42,43)	F(41,42)
+F(40,41)	F(39,40)	F(38,39)	F(37,38)
+F(36,37)	F(35,36)	F(34,35)	F(33,34)
+F(32,33)	F(31,32)	F(30,31)	F(29,30)
+F(28,29)	F(27,28)	F(26,27)	F(25,26)
+F(24,25)	F(23,24)	F(22,23)	F(21,22)
+F(20,21)	F(19,20)	F(18,19)	F(17,18)
+F(16,17)	F(15,16)	F(14,15)	F(13,14)
+F(12,13)	F(11,12)	F(10,11)	F(9,10)
+F(8,9)		F(7,8)		F(6,7)		F(5,6)
+F(4,5)		F(3,4)		F(2,3)		F(1,2)
+
+int
+main (int argc, char **argv)
+{
+  if (argc > 1 && strcmp (argv[1], "-v") == 0)
+    verbose = 1;
+
+  return f1 ();
+}