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-rw-r--r--libbacktrace/ztest.c541
1 files changed, 541 insertions, 0 deletions
diff --git a/libbacktrace/ztest.c b/libbacktrace/ztest.c
new file mode 100644
index 0000000..4e79c09
--- /dev/null
+++ b/libbacktrace/ztest.c
@@ -0,0 +1,541 @@
+/* ztest.c -- Test for libbacktrace inflate code.
+ Copyright (C) 2017-2021 Free Software Foundation, Inc.
+ Written by Ian Lance Taylor, Google.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+ (1) Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ (2) Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in
+ the documentation and/or other materials provided with the
+ distribution.
+
+ (3) The name of the author may not be used to
+ endorse or promote products derived from this software without
+ specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE. */
+
+#include "config.h"
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#ifdef HAVE_ZLIB
+#include <zlib.h>
+#endif
+
+#include "backtrace.h"
+#include "backtrace-supported.h"
+
+#include "internal.h"
+#include "testlib.h"
+
+#ifndef HAVE_CLOCK_GETTIME
+
+typedef int xclockid_t;
+
+static int
+xclock_gettime (xclockid_t id ATTRIBUTE_UNUSED,
+ struct timespec *ts ATTRIBUTE_UNUSED)
+{
+ errno = EINVAL;
+ return -1;
+}
+
+#define clockid_t xclockid_t
+#define clock_gettime xclock_gettime
+#undef CLOCK_REALTIME
+#define CLOCK_REALTIME 0
+
+#endif /* !defined(HAVE_CLOCK_GETTIME) */
+
+#ifdef CLOCK_PROCESS_CPUTIME_ID
+#define ZLIB_CLOCK_GETTIME_ARG CLOCK_PROCESS_CPUTIME_ID
+#else
+#define ZLIB_CLOCK_GETTIME_ARG CLOCK_REALTIME
+#endif
+
+/* Some tests for the local zlib inflation code. */
+
+struct zlib_test
+{
+ const char *name;
+ const char *uncompressed;
+ size_t uncompressed_len;
+ const char *compressed;
+ size_t compressed_len;
+};
+
+/* Error callback. */
+
+static void
+error_callback_compress (void *vdata ATTRIBUTE_UNUSED, const char *msg,
+ int errnum)
+{
+ fprintf (stderr, "%s", msg);
+ if (errnum > 0)
+ fprintf (stderr, ": %s", strerror (errnum));
+ fprintf (stderr, "\n");
+ exit (EXIT_FAILURE);
+}
+
+static const struct zlib_test tests[] =
+{
+ {
+ "empty",
+ "",
+ 0,
+ "\x78\x9c\x03\x00\x00\x00\x00\x01",
+ 8,
+ },
+ {
+ "hello",
+ "hello, world\n",
+ 0,
+ ("\x78\x9c\xca\x48\xcd\xc9\xc9\xd7\x51\x28\xcf"
+ "\x2f\xca\x49\xe1\x02\x04\x00\x00\xff\xff\x21\xe7\x04\x93"),
+ 25,
+ },
+ {
+ "goodbye",
+ "goodbye, world",
+ 0,
+ ("\x78\x9c\x4b\xcf\xcf\x4f\x49\xaa"
+ "\x4c\xd5\x51\x28\xcf\x2f\xca\x49"
+ "\x01\x00\x28\xa5\x05\x5e"),
+ 22,
+ },
+ {
+ "ranges",
+ ("\xcc\x11\x00\x00\x00\x00\x00\x00\xd5\x13\x00\x00\x00\x00\x00\x00"
+ "\x1c\x14\x00\x00\x00\x00\x00\x00\x72\x14\x00\x00\x00\x00\x00\x00"
+ "\x9d\x14\x00\x00\x00\x00\x00\x00\xd5\x14\x00\x00\x00\x00\x00\x00"
+ "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
+ "\xfb\x12\x00\x00\x00\x00\x00\x00\x09\x13\x00\x00\x00\x00\x00\x00"
+ "\x0c\x13\x00\x00\x00\x00\x00\x00\xcb\x13\x00\x00\x00\x00\x00\x00"
+ "\x29\x14\x00\x00\x00\x00\x00\x00\x4e\x14\x00\x00\x00\x00\x00\x00"
+ "\x9d\x14\x00\x00\x00\x00\x00\x00\xd5\x14\x00\x00\x00\x00\x00\x00"
+ "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
+ "\xfb\x12\x00\x00\x00\x00\x00\x00\x09\x13\x00\x00\x00\x00\x00\x00"
+ "\x67\x13\x00\x00\x00\x00\x00\x00\xcb\x13\x00\x00\x00\x00\x00\x00"
+ "\x9d\x14\x00\x00\x00\x00\x00\x00\xd5\x14\x00\x00\x00\x00\x00\x00"
+ "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
+ "\x5f\x0b\x00\x00\x00\x00\x00\x00\x6c\x0b\x00\x00\x00\x00\x00\x00"
+ "\x7d\x0b\x00\x00\x00\x00\x00\x00\x7e\x0c\x00\x00\x00\x00\x00\x00"
+ "\x38\x0f\x00\x00\x00\x00\x00\x00\x5c\x0f\x00\x00\x00\x00\x00\x00"
+ "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
+ "\x83\x0c\x00\x00\x00\x00\x00\x00\xfa\x0c\x00\x00\x00\x00\x00\x00"
+ "\xfd\x0d\x00\x00\x00\x00\x00\x00\xef\x0e\x00\x00\x00\x00\x00\x00"
+ "\x14\x0f\x00\x00\x00\x00\x00\x00\x38\x0f\x00\x00\x00\x00\x00\x00"
+ "\x9f\x0f\x00\x00\x00\x00\x00\x00\xac\x0f\x00\x00\x00\x00\x00\x00"
+ "\xdb\x0f\x00\x00\x00\x00\x00\x00\xff\x0f\x00\x00\x00\x00\x00\x00"
+ "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
+ "\xfd\x0d\x00\x00\x00\x00\x00\x00\xd8\x0e\x00\x00\x00\x00\x00\x00"
+ "\x9f\x0f\x00\x00\x00\x00\x00\x00\xac\x0f\x00\x00\x00\x00\x00\x00"
+ "\xdb\x0f\x00\x00\x00\x00\x00\x00\xff\x0f\x00\x00\x00\x00\x00\x00"
+ "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
+ "\xfa\x0c\x00\x00\x00\x00\x00\x00\xea\x0d\x00\x00\x00\x00\x00\x00"
+ "\xef\x0e\x00\x00\x00\x00\x00\x00\x14\x0f\x00\x00\x00\x00\x00\x00"
+ "\x5c\x0f\x00\x00\x00\x00\x00\x00\x9f\x0f\x00\x00\x00\x00\x00\x00"
+ "\xac\x0f\x00\x00\x00\x00\x00\x00\xdb\x0f\x00\x00\x00\x00\x00\x00"
+ "\xff\x0f\x00\x00\x00\x00\x00\x00\x2c\x10\x00\x00\x00\x00\x00\x00"
+ "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
+ "\x60\x11\x00\x00\x00\x00\x00\x00\xd1\x16\x00\x00\x00\x00\x00\x00"
+ "\x40\x0b\x00\x00\x00\x00\x00\x00\x2c\x10\x00\x00\x00\x00\x00\x00"
+ "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
+ "\x7a\x00\x00\x00\x00\x00\x00\x00\xb6\x00\x00\x00\x00\x00\x00\x00"
+ "\x9f\x01\x00\x00\x00\x00\x00\x00\xa7\x01\x00\x00\x00\x00\x00\x00"
+ "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
+ "\x7a\x00\x00\x00\x00\x00\x00\x00\xa9\x00\x00\x00\x00\x00\x00\x00"
+ "\x9f\x01\x00\x00\x00\x00\x00\x00\xa7\x01\x00\x00\x00\x00\x00\x00"
+ "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"),
+ 672,
+ ("\x78\x9c\x3b\x23\xc8\x00\x06\x57\x85\x21\xb4\x8c\x08\x84\x2e\x82"
+ "\xd2\x73\xa1\xf4\x55\x28\x8d\x0e\x7e\x0b\x41\x68\x4e\xa8\x7e\x1e"
+ "\x28\x7d\x1a\x4a\x6b\x42\xf5\xf9\x91\x69\x5e\x3a\x9a\x79\x84\xf4"
+ "\xc7\x73\x43\xe8\x1c\x28\x5d\x0b\xa5\xeb\x78\x20\xb4\x05\x3f\x84"
+ "\x8e\xe1\xc7\xae\xbf\x19\xaa\xee\x17\x94\xfe\xcb\x0b\xa1\xdf\xf3"
+ "\x41\x68\x11\x7e\x54\x73\xe6\x43\xe9\x35\x50\xfa\x36\x94\xfe\x8f"
+ "\xc3\x7c\x98\x79\x37\xf8\xc8\xd3\x0f\x73\xd7\x2b\x1c\xee\x8a\x21"
+ "\xd2\x5d\x3a\x02\xd8\xcd\x4f\x80\xa6\x87\x8b\x62\x10\xda\x81\x1b"
+ "\xbf\xfa\x2a\x28\xbd\x0d\x4a\xcf\x67\x84\xd0\xcb\x19\xf1\xab\x5f"
+ "\x49\xa4\x7a\x00\x48\x97\x29\xd4"),
+ 152,
+ }
+};
+
+/* Test the hand coded samples. */
+
+static void
+test_samples (struct backtrace_state *state)
+{
+ size_t i;
+
+ for (i = 0; i < sizeof tests / sizeof tests[0]; ++i)
+ {
+ char *p;
+ size_t v;
+ size_t j;
+ unsigned char *uncompressed;
+ size_t uncompressed_len;
+
+ p = malloc (12 + tests[i].compressed_len);
+ memcpy (p, "ZLIB", 4);
+ v = tests[i].uncompressed_len;
+ if (v == 0)
+ v = strlen (tests[i].uncompressed);
+ for (j = 0; j < 8; ++j)
+ p[j + 4] = (v >> ((7 - j) * 8)) & 0xff;
+ memcpy (p + 12, tests[i].compressed, tests[i].compressed_len);
+ uncompressed = NULL;
+ uncompressed_len = 0;
+ if (!backtrace_uncompress_zdebug (state, (unsigned char *) p,
+ tests[i].compressed_len + 12,
+ error_callback_compress, NULL,
+ &uncompressed, &uncompressed_len))
+ {
+ fprintf (stderr, "test %s: uncompress failed\n", tests[i].name);
+ ++failures;
+ }
+ else
+ {
+ if (uncompressed_len != v)
+ {
+ fprintf (stderr,
+ "test %s: got uncompressed length %zu, want %zu\n",
+ tests[i].name, uncompressed_len, v);
+ ++failures;
+ }
+ else if (memcmp (tests[i].uncompressed, uncompressed, v) != 0)
+ {
+ size_t j;
+
+ fprintf (stderr, "test %s: uncompressed data mismatch\n",
+ tests[i].name);
+ for (j = 0; j < v; ++j)
+ if (tests[i].uncompressed[j] != uncompressed[j])
+ fprintf (stderr, " %zu: got %#x want %#x\n", j,
+ uncompressed[j], tests[i].uncompressed[j]);
+ ++failures;
+ }
+ else
+ printf ("PASS: inflate %s\n", tests[i].name);
+
+ backtrace_free (state, uncompressed, uncompressed_len,
+ error_callback_compress, NULL);
+ }
+ }
+}
+
+#ifdef HAVE_ZLIB
+
+/* Given a set of TRIALS timings, discard the lowest and highest
+ values and return the mean average of the rest. */
+
+static size_t
+average_time (const size_t *times, size_t trials)
+{
+ size_t imax;
+ size_t max;
+ size_t imin;
+ size_t min;
+ size_t i;
+ size_t sum;
+
+ imin = 0;
+ imax = 0;
+ min = times[0];
+ max = times[0];
+ for (i = 1; i < trials; ++i)
+ {
+ if (times[i] < min)
+ {
+ imin = i;
+ min = times[i];
+ }
+ if (times[i] > max)
+ {
+ imax = i;
+ max = times[i];
+ }
+ }
+
+ sum = 0;
+ for (i = 0; i < trials; ++i)
+ {
+ if (i != imax && i != imin)
+ sum += times[i];
+ }
+ return sum / (trials - 2);
+}
+
+#endif
+
+/* Test a larger text, if available. */
+
+static void
+test_large (struct backtrace_state *state ATTRIBUTE_UNUSED)
+{
+#ifdef HAVE_ZLIB
+ unsigned char *orig_buf;
+ size_t orig_bufsize;
+ size_t i;
+ char *compressed_buf;
+ size_t compressed_bufsize;
+ unsigned long compress_sizearg;
+ unsigned char *uncompressed_buf;
+ size_t uncompressed_bufsize;
+ int r;
+ clockid_t cid;
+ struct timespec ts1;
+ struct timespec ts2;
+ size_t ctime;
+ size_t ztime;
+ const size_t trials = 16;
+ size_t ctimes[16];
+ size_t ztimes[16];
+ static const char * const names[] = {
+ "Isaac.Newton-Opticks.txt",
+ "../libgo/go/testdata/Isaac.Newton-Opticks.txt",
+ };
+
+ orig_buf = NULL;
+ orig_bufsize = 0;
+ uncompressed_buf = NULL;
+ compressed_buf = NULL;
+
+ for (i = 0; i < sizeof names / sizeof names[0]; ++i)
+ {
+ size_t len;
+ char *namebuf;
+ FILE *e;
+ struct stat st;
+ char *rbuf;
+ size_t got;
+
+ len = strlen (SRCDIR) + strlen (names[i]) + 2;
+ namebuf = malloc (len);
+ if (namebuf == NULL)
+ {
+ perror ("malloc");
+ goto fail;
+ }
+ snprintf (namebuf, len, "%s/%s", SRCDIR, names[i]);
+ e = fopen (namebuf, "r");
+ free (namebuf);
+ if (e == NULL)
+ continue;
+ if (fstat (fileno (e), &st) < 0)
+ {
+ perror ("fstat");
+ fclose (e);
+ continue;
+ }
+ rbuf = malloc (st.st_size);
+ if (rbuf == NULL)
+ {
+ perror ("malloc");
+ goto fail;
+ }
+ got = fread (rbuf, 1, st.st_size, e);
+ fclose (e);
+ if (got > 0)
+ {
+ orig_buf = (unsigned char *) rbuf;
+ orig_bufsize = got;
+ break;
+ }
+ free (rbuf);
+ }
+
+ if (orig_buf == NULL)
+ {
+ /* We couldn't find an input file. */
+ printf ("UNSUPPORTED: inflate large\n");
+ return;
+ }
+
+ compressed_bufsize = compressBound (orig_bufsize) + 12;
+ compressed_buf = malloc (compressed_bufsize);
+ if (compressed_buf == NULL)
+ {
+ perror ("malloc");
+ goto fail;
+ }
+
+ compress_sizearg = compressed_bufsize - 12;
+ r = compress ((unsigned char *) compressed_buf + 12, &compress_sizearg,
+ orig_buf, orig_bufsize);
+ if (r != Z_OK)
+ {
+ fprintf (stderr, "zlib compress failed: %d\n", r);
+ goto fail;
+ }
+
+ compressed_bufsize = compress_sizearg + 12;
+
+ /* Prepare the header that our library expects. */
+ memcpy (compressed_buf, "ZLIB", 4);
+ for (i = 0; i < 8; ++i)
+ compressed_buf[i + 4] = (orig_bufsize >> ((7 - i) * 8)) & 0xff;
+
+ uncompressed_buf = malloc (orig_bufsize);
+ if (uncompressed_buf == NULL)
+ {
+ perror ("malloc");
+ goto fail;
+ }
+ uncompressed_bufsize = orig_bufsize;
+
+ if (!backtrace_uncompress_zdebug (state, (unsigned char *) compressed_buf,
+ compressed_bufsize,
+ error_callback_compress, NULL,
+ &uncompressed_buf, &uncompressed_bufsize))
+ {
+ fprintf (stderr, "inflate large: backtrace_uncompress_zdebug failed\n");
+ goto fail;
+ }
+
+ if (uncompressed_bufsize != orig_bufsize)
+ {
+ fprintf (stderr,
+ "inflate large: got uncompressed length %zu, want %zu\n",
+ uncompressed_bufsize, orig_bufsize);
+ goto fail;
+ }
+
+ if (memcmp (uncompressed_buf, orig_buf, uncompressed_bufsize) != 0)
+ {
+ fprintf (stderr, "inflate large: uncompressed data mismatch\n");
+ goto fail;
+ }
+
+ printf ("PASS: inflate large\n");
+
+ for (i = 0; i < trials; ++i)
+ {
+ unsigned long uncompress_sizearg;
+
+ cid = ZLIB_CLOCK_GETTIME_ARG;
+ if (clock_gettime (cid, &ts1) < 0)
+ {
+ if (errno == EINVAL)
+ return;
+ perror ("clock_gettime");
+ return;
+ }
+
+ if (!backtrace_uncompress_zdebug (state,
+ (unsigned char *) compressed_buf,
+ compressed_bufsize,
+ error_callback_compress, NULL,
+ &uncompressed_buf,
+ &uncompressed_bufsize))
+ {
+ fprintf (stderr,
+ ("inflate large: "
+ "benchmark backtrace_uncompress_zdebug failed\n"));
+ return;
+ }
+
+ if (clock_gettime (cid, &ts2) < 0)
+ {
+ perror ("clock_gettime");
+ return;
+ }
+
+ ctime = (ts2.tv_sec - ts1.tv_sec) * 1000000000;
+ ctime += ts2.tv_nsec - ts1.tv_nsec;
+ ctimes[i] = ctime;
+
+ if (clock_gettime (cid, &ts1) < 0)
+ {
+ perror("clock_gettime");
+ return;
+ }
+
+ uncompress_sizearg = uncompressed_bufsize;
+ r = uncompress ((unsigned char *) uncompressed_buf, &uncompress_sizearg,
+ (unsigned char *) compressed_buf + 12,
+ compressed_bufsize - 12);
+
+ if (clock_gettime (cid, &ts2) < 0)
+ {
+ perror ("clock_gettime");
+ return;
+ }
+
+ if (r != Z_OK)
+ {
+ fprintf (stderr,
+ "inflate large: benchmark zlib uncompress failed: %d\n",
+ r);
+ return;
+ }
+
+ ztime = (ts2.tv_sec - ts1.tv_sec) * 1000000000;
+ ztime += ts2.tv_nsec - ts1.tv_nsec;
+ ztimes[i] = ztime;
+ }
+
+ /* Toss the highest and lowest times and average the rest. */
+ ctime = average_time (ctimes, trials);
+ ztime = average_time (ztimes, trials);
+
+ printf ("backtrace: %zu ns\n", ctime);
+ printf ("zlib : %zu ns\n", ztime);
+ printf ("ratio : %g\n", (double) ztime / (double) ctime);
+
+ return;
+
+ fail:
+ printf ("FAIL: inflate large\n");
+ ++failures;
+
+ if (orig_buf != NULL)
+ free (orig_buf);
+ if (compressed_buf != NULL)
+ free (compressed_buf);
+ if (uncompressed_buf != NULL)
+ free (uncompressed_buf);
+
+#else /* !HAVE_ZLIB */
+
+ printf ("UNSUPPORTED: inflate large\n");
+
+#endif /* !HAVE_ZLIB */
+}
+
+int
+main (int argc ATTRIBUTE_UNUSED, char **argv)
+{
+ struct backtrace_state *state;
+
+ state = backtrace_create_state (argv[0], BACKTRACE_SUPPORTS_THREADS,
+ error_callback_create, NULL);
+
+ test_samples (state);
+ test_large (state);
+
+ exit (failures != 0 ? EXIT_FAILURE : EXIT_SUCCESS);
+}
generated by cgit v1.1 at 2024-11-25 14:17:39 +0000