1 # This testcase is part of GDB, the GNU debugger.
3 # Copyright 2016-2020 Free Software Foundation, Inc.
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13 # GNU General Public License for more details.
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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.
23 if { [skip_btrace_tests] } {
24 unsupported "target does not support record-btrace"
28 # This test requires the compiler to generate a tail call. To guarantee that
29 # we always get one, we use an assembly source file.
31 # We use different assembly sources based on the target architecture.
33 # Luckily, they are similar enough that a single test script can handle
36 if [info exists COMPILE] {
37 # make check RUNTESTFLAGS="gdb.btrace/tailcall-only.exp COMPILE=1"
38 standard_testfile tailcall-only.c
39 lappend opts debug optimize=-O2
40 } elseif {[istarget "i?86-*-*"] || [istarget "x86_64-*-*"]} {
41 if {[is_amd64_regs_target]} {
42 standard_testfile x86_64-tailcall-only.S
44 standard_testfile i686-tailcall-only.S
47 unsupported "target architecture not supported"
51 if [prepare_for_testing "failed to prepare" $testfile $srcfile $opts] {
56 untested "failed to run to main"
60 # we want to see the full trace for this test
61 gdb_test_no_output "set record function-call-history-size 0"
64 gdb_test "step" ".*" "prepare for recording"
65 gdb_test_no_output "record btrace"
66 gdb_test "stepi 4" ".*" "record branch trace"
69 gdb_test "info record" ".*"
71 # show the branch trace with calls indented
72 gdb_test "record function-call-history /c 1" [multi_line \
77 ] "function-call-history"
80 gdb_test "record goto begin" ".*foo.*"
81 gdb_test "stepi" ".*foo_1.*" "step into foo_1"
82 gdb_test "step" ".*bar.*" "step into bar"
83 gdb_test "stepi" ".*bar_1.*" "step into bar_1"
85 # We can neither finish nor return.
86 gdb_test "finish" "Cannot find the caller frame.*"
87 gdb_test_multiple "return" "return" {
88 -re "Make .* return now.*y or n. $" {
92 -re "Cannot find the caller frame.*$gdb_prompt $" {
97 # But we can reverse-finish
98 gdb_test "reverse-finish" ".*bar.*"
99 gdb_test "reverse-step" ".*foo_1.*"
101 # Info frame isn't useful but doesn't crash as it used to.
102 gdb_test "up" ".*foo.*"
103 gdb_test "info frame" ".*"