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

   1 # Copyright 2013-2023 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 require dwarf2_support
  19
  20 standard_testfile .c entry-values-dw.S
  21
  22 if  {[gdb_compile ${srcdir}/${subdir}/${srcfile} ${binfile}1.o \
  23           object {nodebug}] != ""} {
  24     return -1
  25 }
  26
  27 if  {[gdb_compile [list ${binfile}1.o] \
  28           "${binfile}1" executable {}] != ""} {
  29     return -1
  30 }
  31
  32 clean_restart ${binfile}1
  33
  34 set returned_from_foo ""
  35
  36 if { [istarget "arm*-*-*"] || [istarget "aarch64*-*-*"] } {
  37     set call_insn "bl"
  38 } elseif { [istarget "s390*-*-*"] } {
  39     set call_insn "brasl"
  40 } elseif { [istarget "powerpc*-*-*"] } {
  41     set call_insn "bl"
  42 } elseif { [istarget "mips*-*-*"] } {
  43     # Skip the delay slot after the instruction used to make a call
  44     # (which can be a jump or a branch) if it has one.
  45     #
  46     #  JUMP (or BRANCH) foo
  47     #  insn1
  48     #  insn2
  49     #
  50     # Most MIPS instructions used to make calls have a delay slot.
  51     # These include JAL, JALS, JALX, JALR, JALRS, BAL and BALS.
  52     # In this case the program continues from `insn2' when `foo'
  53     # returns.  The only exception is JALRC, in which case execution
  54     # resumes from `insn1' instead.
  55     set call_insn {jalrc|[jb]al[sxr]*[ \t][^\r\n]+\r\n}
  56 } else {
  57     set call_insn "call"
  58 }
  59
  60 # Calculate the offset of the instruction in bar returned from foo.
  61 set test "disassemble bar"
  62 gdb_test_multiple $test $test {
  63     -re ".*$hex <\\+$decimal>:\[ \t\]+\\y$call_insn\\y\[^\r\n\]+\r\n\[ \]+$hex <\\+($decimal)>:.*$gdb_prompt $" {
  64         set returned_from_foo $expect_out(1,string)
  65     }
  66     -re ".*$gdb_prompt $" {
  67         fail $test
  68     }
  69 }
  70
  71 if { [string equal $returned_from_foo ""] } {
  72     fail "find the call or branch instruction offset in bar"
  73     # The following test makes no sense if the offset is unknown.  We need
  74     # to update the pattern above to match call or branch instruction for
  75     # the target architecture.
  76     return -1
  77 }
  78
  79 # Make some DWARF for the test.
  80 set asm_file [standard_output_file $srcfile2]
  81 Dwarf::assemble $asm_file {
  82     declare_labels int_label foo_label
  83     global returned_from_foo
  84     global srcdir subdir srcfile
  85
  86     set bar_result [function_range bar ${srcdir}/${subdir}/${srcfile}]
  87     set bar_start [lindex $bar_result 0]
  88     set bar_length [lindex $bar_result 1]
  89
  90     cu {} {
  91         compile_unit {{language @DW_LANG_C}} {
  92             int_label: base_type {
  93                 {name int}
  94                 {encoding @DW_ATE_signed}
  95                 {byte_size 4 DW_FORM_sdata}
  96             }
  97
  98             foo_label: subprogram {
  99                 {decl_file 0 udata}
 100                 {MACRO_AT_func { foo }}
 101             } {
 102                 formal_parameter {
 103                     {type :$int_label}
 104                     {name i}
 105                     {location {DW_OP_reg0} SPECIAL_expr}
 106                 }
 107                 formal_parameter {
 108                     {type :$int_label}
 109                     {name j}
 110                     {location {DW_OP_reg1} SPECIAL_expr}
 111                 }
 112             }
 113
 114             subprogram {
 115                 {name bar}
 116                 {decl_file 0 udata}
 117                 {low_pc $bar_start addr}
 118                 {high_pc "$bar_start + $bar_length" addr}
 119                 {GNU_all_call_sites 1 sdata}
 120             } {
 121                 formal_parameter {
 122                     {type :$int_label}
 123                     {name i}
 124                 }
 125
 126                 GNU_call_site {
 127                     {low_pc "$bar_start + $returned_from_foo" addr}
 128                     {abstract_origin :$foo_label}
 129                 } {
 130                     # Faked entry values are reference to variables 'global1'
 131                     # and 'global2' and faked locations are register 0 and
 132                     # register 1.
 133                     GNU_call_site_parameter {
 134                         {location {DW_OP_reg0} SPECIAL_expr}
 135                         {GNU_call_site_value {
 136                             addr global1
 137                             deref_size 4
 138                         } SPECIAL_expr}
 139                     }
 140                     GNU_call_site_parameter {
 141                         {location {DW_OP_reg1} SPECIAL_expr}
 142                         {GNU_call_site_value {
 143                             addr global2
 144                             deref_size 4
 145                         } SPECIAL_expr}
 146                     }
 147                 }
 148             }
 149         }
 150     }
 151 }
 152
 153 if  {[gdb_compile $asm_file ${binfile}2.o object {nodebug}] != ""} {
 154     return -1
 155 }
 156
 157 if  {[gdb_compile [list ${binfile}1.o ${binfile}2.o] \
 158           "${binfile}" executable {}] != ""} {
 159     return -1
 160 }
 161
 162 clean_restart ${testfile}
 163
 164 if ![runto_main] {
 165     return -1
 166 }
 167
 168 gdb_breakpoint "foo"
 169
 170 gdb_continue_to_breakpoint "foo"
 171
 172 gdb_test_no_output "set print entry-values both"
 173
 174 gdb_test_sequence "bt" "bt (1)" {
 175     "\[\r\n\]#0 .* foo \\(i=[-]?[0-9]+, i@entry=2, j=[-]?[0-9]+, j@entry=3\\)"
 176     "\[\r\n\]#1 .* bar \\(i=<optimized out>, i@entry=<optimized out>\\)"
 177     "\[\r\n\]#2 .* \.?main \\(\\)"
 178 }
 179
 180 # Update global variables 'global1' and 'global2' and test that the
 181 # entry values are updated too.
 182
 183 gdb_test_no_output "set var *(int *) &global1=10"
 184 gdb_test_no_output "set var *(int *) &global2=11"
 185
 186 gdb_test_sequence "bt" "bt (2)" {
 187     "\[\r\n\]#0 .* foo \\(i=[-]?[0-9]+, i@entry=10, j=[-]?[0-9]+, j@entry=11\\)"
 188     "\[\r\n\]#1 .* bar \\(i=<optimized out>, i@entry=<optimized out>\\)"
 189     "\[\r\n\]#2 .* \.?main \\(\\)"
 190 }
 191
 192 # Restart GDB and trace.
 193
 194 clean_restart $binfile
 195
 196 load_lib "trace-support.exp"
 197
 198 if ![runto_main] {
 199     return -1
 200 }
 201
 202 if ![gdb_target_supports_trace] {
 203     unsupported "target does not support trace"
 204     return -1
 205 }
 206
 207 gdb_test "trace foo" "Tracepoint $decimal at .*"
 208
 209 # Collect arguments i and j.  Collect 'global1' which is entry value
 210 # of argument i.  Don't collect 'global2' to test the entry value of
 211 # argument j.
 212
 213 gdb_trace_setactions "set action for tracepoint 1" "" \
 214     "collect i, j, (int) global1, \(\*\(void \*\*\) \(\$$spreg\)\) @ 128" "^$"
 215
 216 gdb_test_no_output "tstart"
 217
 218 gdb_breakpoint "end"
 219 gdb_continue_to_breakpoint "end"
 220
 221 gdb_test_no_output "tstop"
 222
 223 gdb_test "tfind" "Found trace frame 0, .*" "tfind start"
 224
 225 # Since 'global2' is not collected, j@entry is expected to be 'unavailable'.
 226 gdb_test "bt 1" "#0 .* foo \\(i=\[-\]?$decimal, i@entry=2, j=\[-\]?$decimal, j@entry=<unavailable>\\).*"
 227
 228 # Test that unavailable "j@entry" is not shown when command option
 229 # --skip-unavailable is used.
 230 gdb_test "interpreter-exec mi \"-stack-list-arguments --skip-unavailable --simple-values\"" \
 231     "\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=.*\\\].*"
 232
 233 gdb_test "tfind" "Target failed to find requested trace frame\..*"