gdb/testsuite/gdb.btrace/tailcall.exp

   1 # This testcase is part of GDB, the GNU debugger.
   2 #
   3 # Copyright 2013-2015 Free Software Foundation, Inc.
   4 #
   5 # Contributed by Intel Corp. <markus.t.metzger@intel.com>
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 # check for btrace support
  21 if { [skip_btrace_tests] } { return -1 }
  22
  23 # This test requires the compiler to generate a tail call.  To guarantee that
  24 # we always get one, we use an assembly source file.
  25 #
  26 # We use different assembly sources based on the target architecture.
  27 #
  28 # Luckily, they are similar enough that a single test script can handle
  29 # both.
  30 set opts {}
  31 if [info exists COMPILE] {
  32     # make check RUNTESTFLAGS="gdb.btrace/tailcall.exp COMPILE=1"
  33     standard_testfile tailcall.c
  34     lappend opts debug optimize=-O2
  35 } elseif {[istarget "x86_64-*-*"]} {
  36         standard_testfile x86_64-tailcall.S
  37 } elseif {[istarget "i?86-*-*"]} {
  38         standard_testfile i686-tailcall.S
  39 } else {
  40     verbose "Skipping ${testfile}."
  41     return
  42 }
  43
  44 if [prepare_for_testing tailcall.exp $testfile $srcfile $opts] {
  45     return -1
  46 }
  47 if ![runto_main] {
  48     return -1
  49 }
  50
  51 # we want to see the full trace for this test
  52 gdb_test_no_output "set record function-call-history-size 0"
  53
  54 # trace the call to foo
  55 gdb_test_no_output "record btrace"
  56 gdb_test "next 2"
  57
  58 # show the flat branch trace
  59 gdb_test "record function-call-history 1" [multi_line \
  60   "1\tmain" \
  61   "2\tfoo" \
  62   "3\tbar" \
  63   "4\tmain" \
  64   ] "flat"
  65
  66 # show the branch trace with calls indented
  67 gdb_test "record function-call-history /c 1" [multi_line \
  68   "1\tmain" \
  69   "2\t  foo" \
  70   "3\t    bar" \
  71   "4\tmain" \
  72   ] "indented"
  73
  74 # go into bar
  75 gdb_test "record goto 4" ".*bar \\(\\) at .*tailcall.c:24\r\n.*"
  76
  77 # check the backtrace
  78 gdb_test "backtrace" [multi_line \
  79   "#0.*bar \\(\\) at tailcall.c:24" \
  80   "#1.*foo \\(\\) at tailcall.c:29" \
  81   "#2.*main \\(\\) at tailcall.c:37" \
  82   "Backtrace stopped: not enough registers or memory available to unwind further" \
  83   ]
  84
  85 # walk the backtrace
  86 gdb_test "up" "#1\[^\r\n\]*foo \\(\\) at tailcall.c:29\r\n.*" "up to foo"
  87 gdb_test "up" "#2\[^\r\n\]*main \\(\\) at tailcall.c:37\r\n.*" "up to main"
  88 gdb_test "down" "#1\[^\r\n\]*foo \\(\\) at tailcall.c:29\r\n.*" "down to foo"
  89
  90 # test stepping into and out of tailcalls.
  91 gdb_test "finish" "\[^\r\n\]*main \\(\\) at tailcall.c:38\r\n.*"
  92 gdb_test "reverse-step" "\[^\r\n\]*bar \\(\\) at tailcall.c:24\r\n.*"
  93 gdb_test "reverse-finish" "\[^\r\n\]*foo \\(\\) at tailcall.c:29\r\n.*"
  94 gdb_test "reverse-step" "\[^\r\n\]*main \\(\\) at tailcall.c:37\r\n.*"
  95 gdb_test "next" "\[^\r\n\]*38.*"
  96 gdb_test "reverse-next" "\[^\r\n\]*main \\(\\) at tailcall.c:37\r\n.*"
  97 gdb_test "step" "\[^\r\n\]*foo \\(\\) at tailcall.c:29\r\n.*"
  98 gdb_test "finish" "\[^\r\n\]*main \\(\\) at tailcall.c:38\r\n.*"
  99 gdb_test "reverse-step" "\[^\r\n\]*bar \\(\\) at tailcall.c:24\r\n.*"
 100 gdb_test "finish" "\[^\r\n\]*main \\(\\) at tailcall.c:38\r\n.*"