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33b4777c MM |
1 | # This testcase is part of GDB, the GNU debugger. |
2 | # | |
3 | # Copyright 2016 Free Software Foundation, Inc. | |
4 | # | |
5 | # This program is free software; you can redistribute it and/or modify | |
6 | # it under the terms of the GNU General Public License as published by | |
7 | # the Free Software Foundation; either version 3 of the License, or | |
8 | # (at your option) any later version. | |
9 | # | |
10 | # This program is distributed in the hope that it will be useful, | |
11 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | # GNU General Public License for more details. | |
14 | # | |
15 | # You should have received a copy of the GNU General Public License | |
16 | # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
17 | # | |
18 | # | |
19 | # This is a variant of tailcall.exp where the entire trace contains only tail | |
20 | # calls. This used to cause a crash in get_frame_type. | |
21 | # | |
22 | ||
23 | # check for btrace support | |
24 | if { [skip_btrace_tests] } { return -1 } | |
25 | ||
26 | # This test requires the compiler to generate a tail call. To guarantee that | |
27 | # we always get one, we use an assembly source file. | |
28 | # | |
29 | # We use different assembly sources based on the target architecture. | |
30 | # | |
31 | # Luckily, they are similar enough that a single test script can handle | |
32 | # both. | |
33 | set opts {} | |
34 | if [info exists COMPILE] { | |
35 | # make check RUNTESTFLAGS="gdb.btrace/tailcall-only.exp COMPILE=1" | |
36 | standard_testfile tailcall-only.c | |
37 | lappend opts debug optimize=-O2 | |
7674d381 | 38 | } elseif {[istarget "i?86-*-*"] || [istarget "x86_64-*-*"]} { |
e0461dbb MM |
39 | if {[is_amd64_regs_target]} { |
40 | standard_testfile x86_64-tailcall-only.S | |
41 | } else { | |
42 | standard_testfile i686-tailcall-only.S | |
43 | } | |
33b4777c MM |
44 | } else { |
45 | verbose "Skipping ${testfile}." | |
e0461dbb | 46 | return -1 |
33b4777c MM |
47 | } |
48 | ||
5b362f04 | 49 | if [prepare_for_testing "failed to prepare" $testfile $srcfile $opts] { |
33b4777c MM |
50 | return -1 |
51 | } | |
52 | if ![runto_main] { | |
53 | return -1 | |
54 | } | |
55 | ||
56 | # we want to see the full trace for this test | |
57 | gdb_test_no_output "set record function-call-history-size 0" | |
58 | ||
59 | # trace foo | |
60 | gdb_test "step" ".*" "prepare for recording" | |
61 | gdb_test_no_output "record btrace" | |
62 | gdb_test "stepi 4" ".*" "record branch trace" | |
63 | ||
64 | # for debugging | |
65 | gdb_test "info record" ".*" | |
66 | ||
67 | # show the branch trace with calls indented | |
68 | gdb_test "record function-call-history /c 1" [multi_line \ | |
69 | "1\tfoo" \ | |
70 | "2\t foo_1" \ | |
71 | "3\t bar" \ | |
72 | "4\t bar_1" | |
73 | ] "function-call-history" | |
74 | ||
75 | # We can step | |
76 | gdb_test "record goto begin" ".*foo.*" | |
77 | gdb_test "stepi" ".*foo_1.*" "step into foo_1" | |
78 | gdb_test "step" ".*bar.*" "step into bar" | |
79 | gdb_test "stepi" ".*bar_1.*" "step into bar_1" | |
80 | ||
81 | # We can neither finish nor return. | |
82 | gdb_test "finish" "Cannot find the caller frame.*" | |
83 | gdb_test_multiple "return" "return" { | |
84 | -re "Make .* return now.*y or n. $" { | |
85 | send_gdb "y\n" | |
86 | exp_continue | |
87 | } | |
88 | -re "Cannot find the caller frame.*$gdb_prompt $" { | |
89 | pass "return" | |
90 | } | |
91 | } | |
92 | ||
93 | # But we can reverse-finish | |
94 | gdb_test "reverse-finish" ".*bar.*" | |
95 | gdb_test "reverse-step" ".*foo_1.*" | |
96 | ||
97 | # Info frame isn't useful but doesn't crash as it used to. | |
98 | gdb_test "up" ".*foo.*" | |
99 | gdb_test "info frame" ".*" |