gdb/testsuite/gdb.trace/entry-values.exp

   1 # Copyright 2013-2015 Free Software Foundation, Inc.
   2
   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.
   7 #
   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.
  12 #
  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/>.
  15 load_lib dwarf.exp
  16
  17 # This test can only be run on targets which support DWARF-2 and use gas.
  18 if {![dwarf2_support]} {
  19     return 0
  20 }
  21
  22 standard_testfile .c entry-values-dw.S
  23
  24 if  {[gdb_compile ${srcdir}/${subdir}/${srcfile} ${binfile}1.o \
  25           object {nodebug}] != ""} {
  26     return -1
  27 }
  28
  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
  31 # Assembler.
  32
  33 gdb_exit
  34 gdb_start
  35 gdb_reinitialize_dir $srcdir/$subdir
  36 gdb_load ${binfile}1.o
  37
  38 set returned_from_foo ""
  39
  40 if { [istarget "arm*-*-*"] || [istarget "aarch64*-*-*"] } {
  41     set call_insn "bl"
  42 } elseif { [istarget "s390*-*-*"] } {
  43     set call_insn "brasl"
  44 } elseif { [istarget "powerpc*-*-*"] } {
  45     set call_insn "bl"
  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.
  49     #
  50     #  JUMP (or BRANCH) foo
  51     #  insn1
  52     #  insn2
  53     #
  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}
  60 } else {
  61     set call_insn "call"
  62 }
  63
  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 $expect_out(1,string)
  69     }
  70     -re ".*$gdb_prompt $" {
  71         fail $test
  72     }
  73 }
  74
  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.
  80     return -1
  81 }
  82
  83 gdb_exit
  84
  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
  91
  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]
  95
  96     cu {} {
  97         compile_unit {{language @DW_LANG_C}} {
  98             int_label: base_type {
  99                 {name int}
 100                 {encoding @DW_ATE_signed}
 101                 {byte_size 4 DW_FORM_sdata}
 102             }
 103
 104             foo_label: subprogram {
 105                 {decl_file 1 sdata}
 106                 {MACRO_AT_func { foo ${srcdir}/${subdir}/${srcfile} }}
 107             } {
 108                 formal_parameter {
 109                     {type :$int_label}
 110                     {name i}
 111                     {location {DW_OP_reg0} SPECIAL_expr}
 112                 }
 113                 formal_parameter {
 114                     {type :$int_label}
 115                     {name j}
 116                     {location {DW_OP_reg1} SPECIAL_expr}
 117                 }
 118             }
 119
 120             subprogram {
 121                 {name bar}
 122                 {decl_file 1 sdata}
 123                 {low_pc $bar_start addr}
 124                 {high_pc "$bar_start + $bar_length" addr}
 125                 {GNU_all_call_sites 1 sdata}
 126             } {
 127                 formal_parameter {
 128                     {type :$int_label}
 129                     {name i}
 130                 }
 131
 132                 GNU_call_site {
 133                     {low_pc "$bar_start + $returned_from_foo" addr}
 134                     {abstract_origin :$foo_label}
 135                 } {
 136                     # Faked entry values are reference to variables 'global1'
 137                     # and 'global2' and faked locations are register 0 and
 138                     # register 1.
 139                     GNU_call_site_parameter {
 140                         {location {DW_OP_reg0} SPECIAL_expr}
 141                         {GNU_call_site_value {
 142                             addr global1
 143                             deref_size 4
 144                         } SPECIAL_expr}
 145                     }
 146                     GNU_call_site_parameter {
 147                         {location {DW_OP_reg1} SPECIAL_expr}
 148                         {GNU_call_site_value {
 149                             addr global2
 150                             deref_size 4
 151                         } SPECIAL_expr}
 152                     }
 153                 }
 154             }
 155         }
 156     }
 157 }
 158
 159 if  {[gdb_compile $asm_file ${binfile}2.o object {nodebug}] != ""} {
 160     return -1
 161 }
 162
 163 if  {[gdb_compile [list ${binfile}1.o ${binfile}2.o] \
 164           "${binfile}" executable {}] != ""} {
 165     return -1
 166 }
 167
 168 clean_restart ${testfile}
 169
 170 if ![runto_main] {
 171     fail "Can't run to main"
 172     return -1
 173 }
 174
 175 gdb_breakpoint "foo"
 176
 177 gdb_continue_to_breakpoint "foo"
 178
 179 gdb_test_no_output "set print entry-values both"
 180
 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 \\(\\)"
 185 }
 186
 187 # Update global variables 'global1' and 'global2' and test that the
 188 # entry values are updated too.
 189
 190 gdb_test_no_output "set var global1=10"
 191 gdb_test_no_output "set var global2=11"
 192
 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 \\(\\)"
 197 }
 198
 199 # Restart GDB and trace.
 200
 201 clean_restart $binfile
 202
 203 load_lib "trace-support.exp"
 204
 205 if ![runto_main] {
 206     fail "Can't run to main to check for trace support"
 207     return -1
 208 }
 209
 210 if ![gdb_target_supports_trace] {
 211     unsupported "target does not support trace"
 212     return -1
 213 }
 214
 215 gdb_test "trace foo" "Tracepoint $decimal at .*"
 216
 217 if [is_amd64_regs_target] {
 218     set spreg "\$rsp"
 219 } elseif [is_x86_like_target] {
 220     set spreg "\$esp"
 221 } else {
 222     set spreg "\$sp"
 223 }
 224
 225 # Collect arguments i and j.  Collect 'global1' which is entry value
 226 # of argument i.  Don't collect 'global2' to test the entry value of
 227 # argument j.
 228
 229 gdb_trace_setactions "set action for tracepoint 1" "" \
 230     "collect i, j, global1, \(\*\(void \*\*\) \($spreg\)\) @ 64" "^$"
 231
 232 gdb_test_no_output "tstart"
 233
 234 gdb_breakpoint "end"
 235 gdb_continue_to_breakpoint "end"
 236
 237 gdb_test_no_output "tstop"
 238
 239 gdb_test "tfind" "Found trace frame 0, .*" "tfind start"
 240
 241 # Since 'global2' is not collected, j@entry is expected to be 'unavailable'.
 242 gdb_test "bt 1" "#0 .* foo \\(i=\[-\]?$decimal, i@entry=2, j=\[-\]?$decimal, j@entry=<unavailable>\\).*"
 243
 244 # Test that unavailable "j@entry" is not shown when command option
 245 # --skip-unavailable is used.
 246 gdb_test "interpreter-exec mi \"-stack-list-arguments --skip-unavailable --simple-values\"" \
 247     "\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=.*\\\].*"
 248
 249 gdb_test "tfind" "Target failed to find requested trace frame\..*"