1 # Copyright 2013-2016 Free Software Foundation, Inc.
3 # This program is free software; you can redistribute it and/or modify
4 # it under the terms of the GNU General Public License as published by
5 # the Free Software Foundation; either version 3 of the License, or
6 # (at your option) any later version.
8 # This program is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 # GNU General Public License for more details.
13 # You should have received a copy of the GNU General Public License
14 # along with this program. If not, see <http://www.gnu.org/licenses/>.
17 # This test can only be run on targets which support DWARF-2 and use gas.
18 if {![dwarf2_support]} {
22 standard_testfile .c entry-values-dw.S
24 if {[gdb_compile ${srcdir}/${subdir}/${srcfile} ${binfile}1.o \
25 object {nodebug}] != ""} {
29 # Start GDB and load object file, compute the offset of the
30 # instruction in bar returned from foo. It is needed in the Dwarf
35 gdb_reinitialize_dir $srcdir/$subdir
36 gdb_load ${binfile}1.o
38 set returned_from_foo ""
40 if { [istarget "arm*-*-*"] || [istarget "aarch64*-*-*"] } {
42 } elseif { [istarget "s390*-*-*"] } {
44 } elseif { [istarget "powerpc*-*-*"] } {
46 } elseif { [istarget "mips*-*-*"] } {
47 # Skip the delay slot after the instruction used to make a call
48 # (which can be a jump or a branch) if it has one.
50 # JUMP (or BRANCH) foo
54 # Most MIPS instructions used to make calls have a delay slot.
55 # These include JAL, JALS, JALX, JALR, JALRS, BAL and BALS.
56 # In this case the program continues from `insn2' when `foo'
57 # returns. The only exception is JALRC, in which case execution
58 # resumes from `insn1' instead.
59 set call_insn {jalrc|[jb]al[sxr]*[ \t][^\r\n]+\r\n}
64 # Calculate the offset of the instruction in bar returned from foo.
65 set test "disassemble bar"
66 gdb_test_multiple $test $test {
67 -re ".*$hex <\\+$decimal>:\[ \t\]+$call_insn\[^\r\n\]+\r\n\[ \]+$hex <\\+($decimal)>:.*$gdb_prompt $" {
68 set returned_from_foo $expect_out(1,string)
70 -re ".*$gdb_prompt $" {
75 if { [string equal $returned_from_foo ""] } {
76 fail "Find the call or branch instruction offset in bar"
77 # The following test makes no sense if the offset is unknown. We need
78 # to update the pattern above to match call or branch instruction for
79 # the target architecture.
85 # Make some DWARF for the test.
86 set asm_file [standard_output_file $srcfile2]
87 Dwarf::assemble $asm_file {
88 declare_labels int_label foo_label
89 global returned_from_foo
90 global srcdir subdir srcfile
92 set bar_result [function_range bar ${srcdir}/${subdir}/${srcfile}]
93 set bar_start [lindex $bar_result 0]
94 set bar_length [lindex $bar_result 1]
97 compile_unit {{language @DW_LANG_C}} {
98 int_label: base_type {
100 {encoding @DW_ATE_signed}
101 {byte_size 4 DW_FORM_sdata}
104 foo_label: subprogram {
106 {MACRO_AT_func { foo ${srcdir}/${subdir}/${srcfile} }}
111 {location {DW_OP_reg0} SPECIAL_expr}
116 {location {DW_OP_reg1} SPECIAL_expr}
123 {low_pc $bar_start addr}
124 {high_pc "$bar_start + $bar_length" addr}
125 {GNU_all_call_sites 1 sdata}
133 {low_pc "$bar_start + $returned_from_foo" addr}
134 {abstract_origin :$foo_label}
136 # Faked entry values are reference to variables 'global1'
137 # and 'global2' and faked locations are register 0 and
139 GNU_call_site_parameter {
140 {location {DW_OP_reg0} SPECIAL_expr}
141 {GNU_call_site_value {
146 GNU_call_site_parameter {
147 {location {DW_OP_reg1} SPECIAL_expr}
148 {GNU_call_site_value {
159 if {[gdb_compile $asm_file ${binfile}2.o object {nodebug}] != ""} {
163 if {[gdb_compile [list ${binfile}1.o ${binfile}2.o] \
164 "${binfile}" executable {}] != ""} {
168 clean_restart ${testfile}
171 fail "Can't run to main"
177 gdb_continue_to_breakpoint "foo"
179 gdb_test_no_output "set print entry-values both"
181 gdb_test_sequence "bt" "bt (1)" {
182 "\[\r\n\]#0 .* foo \\(i=[-]?[0-9]+, i@entry=2, j=[-]?[0-9]+, j@entry=3\\)"
183 "\[\r\n\]#1 .* bar \\(i=<optimized out>, i@entry=<optimized out>\\)"
184 "\[\r\n\]#2 .* main \\(\\)"
187 # Update global variables 'global1' and 'global2' and test that the
188 # entry values are updated too.
190 gdb_test_no_output "set var global1=10"
191 gdb_test_no_output "set var global2=11"
193 gdb_test_sequence "bt" "bt (2)" {
194 "\[\r\n\]#0 .* foo \\(i=[-]?[0-9]+, i@entry=10, j=[-]?[0-9]+, j@entry=11\\)"
195 "\[\r\n\]#1 .* bar \\(i=<optimized out>, i@entry=<optimized out>\\)"
196 "\[\r\n\]#2 .* main \\(\\)"
199 # Restart GDB and trace.
201 clean_restart $binfile
203 load_lib "trace-support.exp"
206 fail "Can't run to main to check for trace support"
210 if ![gdb_target_supports_trace] {
211 unsupported "target does not support trace"
215 gdb_test "trace foo" "Tracepoint $decimal at .*"
217 # Collect arguments i and j. Collect 'global1' which is entry value
218 # of argument i. Don't collect 'global2' to test the entry value of
221 gdb_trace_setactions "set action for tracepoint 1" "" \
222 "collect i, j, global1, \(\*\(void \*\*\) \(\$$spreg\)\) @ 128" "^$"
224 gdb_test_no_output "tstart"
227 gdb_continue_to_breakpoint "end"
229 gdb_test_no_output "tstop"
231 gdb_test "tfind" "Found trace frame 0, .*" "tfind start"
233 # Since 'global2' is not collected, j@entry is expected to be 'unavailable'.
234 gdb_test "bt 1" "#0 .* foo \\(i=\[-\]?$decimal, i@entry=2, j=\[-\]?$decimal, j@entry=<unavailable>\\).*"
236 # Test that unavailable "j@entry" is not shown when command option
237 # --skip-unavailable is used.
238 gdb_test "interpreter-exec mi \"-stack-list-arguments --skip-unavailable --simple-values\"" \
239 "\r\n\\^done,stack-args=\\\[frame={level=\"0\",args=\\\[{name=\"i\",type=\"int\",value=\".*\"},{name=\"i@entry\",type=\"int\",value=\"2\"},{name=\"j\",type=\"int\",value=\".*\"}\\\]},frame=.*\\\].*"
241 gdb_test "tfind" "Target failed to find requested trace frame\..*"