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-rw-r--r--src/pal/src/libunwind/tests/Gtest-trace.c282
1 files changed, 282 insertions, 0 deletions
diff --git a/src/pal/src/libunwind/tests/Gtest-trace.c b/src/pal/src/libunwind/tests/Gtest-trace.c
new file mode 100644
index 0000000000..fc1f646eac
--- /dev/null
+++ b/src/pal/src/libunwind/tests/Gtest-trace.c
@@ -0,0 +1,282 @@
+/* libunwind - a platform-independent unwind library
+ Copyright (C) 2010, 2011 by FERMI NATIONAL ACCELERATOR LABORATORY
+
+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
+
+#include "compiler.h"
+
+#include <errno.h>
+#if HAVE_EXECINFO_H
+# include <execinfo.h>
+#else
+ extern int backtrace (void **, int);
+#endif
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ucontext.h>
+#include <unistd.h>
+#include <libunwind.h>
+
+#define panic(args...) \
+ { fprintf (stderr, args); exit (-1); }
+
+#define SIG_STACK_SIZE 0x100000
+
+int verbose;
+int num_errors;
+
+/* These variables are global because they
+ * cause the signal stack to overflow */
+char buf[512], name[256];
+void *addresses[3][128];
+unw_cursor_t cursor;
+unw_context_t uc;
+
+static void
+do_backtrace (void)
+{
+ unw_word_t ip;
+ int ret = -UNW_ENOINFO;
+ int depth = 0;
+ int i, n, m;
+
+ if (verbose)
+ printf ("\tnormal trace:\n");
+
+ unw_getcontext (&uc);
+ if (unw_init_local (&cursor, &uc) < 0)
+ panic ("unw_init_local failed!\n");
+
+ do
+ {
+ unw_get_reg (&cursor, UNW_REG_IP, &ip);
+ addresses[0][depth] = (void *) ip;
+ }
+ while ((ret = unw_step (&cursor)) > 0 && ++depth < 128);
+
+ if (ret < 0)
+ {
+ unw_get_reg (&cursor, UNW_REG_IP, &ip);
+ printf ("FAILURE: unw_step() returned %d for ip=%lx\n", ret, (long) ip);
+ ++num_errors;
+ }
+
+ if (verbose)
+ for (i = 0; i < depth; ++i)
+ printf ("\t #%-3d ip=%p\n", i, addresses[0][i]);
+
+ if (verbose)
+ printf ("\n\tvia backtrace():\n");
+
+ n = backtrace (addresses[1], 128);
+
+ if (verbose)
+ for (i = 0; i < n; ++i)
+ printf ("\t #%-3d ip=%p\n", i, addresses[1][i]);
+
+ if (verbose)
+ printf ("\n\tvia unw_backtrace():\n");
+
+ m = unw_backtrace (addresses[2], 128);
+
+ if (verbose)
+ for (i = 0; i < m; ++i)
+ printf ("\t #%-3d ip=%p\n", i, addresses[2][i]);
+
+ if (m != depth+1)
+ {
+ printf ("FAILURE: unw_step() loop and unw_backtrace() depths differ: %d vs. %d\n", depth, m);
+ ++num_errors;
+ }
+
+ if (n != depth+1)
+ {
+ printf ("FAILURE: unw_step() loop and backtrace() depths differ: %d vs. %d\n", depth, n);
+ ++num_errors;
+ }
+
+ if (n == m)
+ for (i = 1; i < n; ++i)
+ /* Allow one in difference in comparison, trace returns adjusted addresses. */
+ if (labs((unw_word_t) addresses[1][i] - (unw_word_t) addresses[2][i]) > 1)
+ {
+ printf ("FAILURE: backtrace() and unw_backtrace() addresses differ at %d: %p vs. %p\n",
+ i, addresses[1][i], addresses[2][i]);
+ ++num_errors;
+ }
+
+ if (n == depth+1)
+ for (i = 1; i < depth; ++i)
+ /* Allow one in difference in comparison, trace returns adjusted addresses. */
+ if (labs((unw_word_t) addresses[0][i] - (unw_word_t) addresses[1][i]) > 1)
+ {
+ printf ("FAILURE: unw_step() loop and backtrace() addresses differ at %d: %p vs. %p\n",
+ i, addresses[0][i], addresses[1][i]);
+ ++num_errors;
+ }
+}
+
+void
+foo (long val UNUSED)
+{
+ do_backtrace ();
+}
+
+void
+bar (long v)
+{
+ extern long f (long);
+ int arr[v];
+
+ /* This is a vain attempt to use up lots of registers to force
+ the frame-chain info to be saved on the memory stack on ia64.
+ It happens to work with gcc v3.3.4 and gcc v3.4.1 but perhaps
+ not with any other compiler. */
+ foo (f (arr[0]) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+ + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+ + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+ + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+ + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+ + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+ + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+ + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+ + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+ + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+ + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+ + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+ + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+ + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+ + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+ + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v)
+ + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + (f (v) + f (v))
+ ))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
+ )))))))))))))))))))))))))))))))))))))))))))))))))))))));
+}
+
+void
+sighandler (int signal, void *siginfo UNUSED, void *context)
+{
+ ucontext_t *uc UNUSED;
+ int sp;
+
+ uc = context;
+
+ if (verbose)
+ {
+ printf ("sighandler: got signal %d, sp=%p", signal, &sp);
+#if UNW_TARGET_IA64
+# if defined(__linux__)
+ printf (" @ %lx", uc->uc_mcontext.sc_ip);
+# else
+ {
+ uint16_t reason;
+ uint64_t ip;
+
+ __uc_get_reason (uc, &reason);
+ __uc_get_ip (uc, &ip);
+ printf (" @ %lx (reason=%d)", ip, reason);
+ }
+# endif
+#elif UNW_TARGET_X86
+#if defined __linux__
+ printf (" @ %lx", (unsigned long) uc->uc_mcontext.gregs[REG_EIP]);
+#elif defined __FreeBSD__
+ printf (" @ %lx", (unsigned long) uc->uc_mcontext.mc_eip);
+#endif
+#elif UNW_TARGET_X86_64
+#if defined __linux__
+ printf (" @ %lx", (unsigned long) uc->uc_mcontext.gregs[REG_RIP]);
+#elif defined __FreeBSD__
+ printf (" @ %lx", (unsigned long) uc->uc_mcontext.mc_rip);
+#endif
+#elif defined UNW_TARGET_ARM
+#if defined __linux__
+ printf (" @ %lx", (unsigned long) uc->uc_mcontext.arm_pc);
+#elif defined __FreeBSD__
+ printf (" @ %lx", (unsigned long) uc->uc_mcontext.__gregs[_REG_PC]);
+#endif
+#endif
+ printf ("\n");
+ }
+ do_backtrace();
+}
+
+int
+main (int argc, char **argv UNUSED)
+{
+ struct sigaction act;
+ stack_t stk;
+
+ verbose = (argc > 1);
+
+ if (verbose)
+ printf ("Normal backtrace:\n");
+
+ bar (1);
+
+ memset (&act, 0, sizeof (act));
+ act.sa_handler = (void (*)(int)) sighandler;
+ act.sa_flags = SA_SIGINFO;
+ if (sigaction (SIGTERM, &act, NULL) < 0)
+ panic ("sigaction: %s\n", strerror (errno));
+
+ if (verbose)
+ printf ("\nBacktrace across signal handler:\n");
+ kill (getpid (), SIGTERM);
+
+ if (verbose)
+ printf ("\nBacktrace across signal handler on alternate stack:\n");
+ stk.ss_sp = malloc (SIG_STACK_SIZE);
+ if (!stk.ss_sp)
+ panic ("failed to allocate %u bytes\n", SIG_STACK_SIZE);
+ stk.ss_size = SIG_STACK_SIZE;
+ stk.ss_flags = 0;
+ if (sigaltstack (&stk, NULL) < 0)
+ panic ("sigaltstack: %s\n", strerror (errno));
+
+ memset (&act, 0, sizeof (act));
+ act.sa_handler = (void (*)(int)) sighandler;
+ act.sa_flags = SA_ONSTACK | SA_SIGINFO;
+ if (sigaction (SIGTERM, &act, NULL) < 0)
+ panic ("sigaction: %s\n", strerror (errno));
+ kill (getpid (), SIGTERM);
+
+ if (num_errors > 0)
+ {
+ fprintf (stderr, "FAILURE: detected %d errors\n", num_errors);
+ exit (-1);
+ }
+
+ if (verbose)
+ printf ("SUCCESS.\n");
+
+ signal (SIGTERM, SIG_DFL);
+ stk.ss_flags = SS_DISABLE;
+ sigaltstack (&stk, NULL);
+ free (stk.ss_sp);
+
+ return 0;
+}
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