gdb/testsuite/gdb.arch/arc-analyze-prologue.exp

   1 # This testcase is part of GDB, the GNU debugger.
   2
   3 # Copyright 2017-2024 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 require {istarget "arc*-*-*"}
  19
  20 standard_testfile .S
  21
  22 # arc-analyze-prologue.S test does not contain debug information thus it must
  23 # be compiled without -g option. Otherwise GDB will try to unwind frames using
  24 # debug information (which does not exist for .S code!) instead of analyzing
  25 # frames manually.
  26 set options {}
  27
  28 if { [prepare_for_testing "failed to prepare" $testfile $srcfile $options] } {
  29     return -1
  30 }
  31
  32 if ![runto_main] {
  33     return 0
  34 }
  35
  36 # Convert list of saved registers and their offsets to a GDB string.
  37 proc saved_regs_to_str { savedregs funcname } {
  38     set str ""
  39     # If blink is stored, that it is present twice in saved regs - as blink and
  40     # as pc.
  41     set has_blink 0
  42     set blink_addr 0
  43     foreach r $savedregs {
  44         if { [llength $r] == 1 } {
  45             append str ".*$r at.*"
  46         } else {
  47             set name [lindex $r 0]
  48             set offset [lindex $r 1]
  49             set addr [get_hexadecimal_valueof "\$sp+$offset" 0 \
  50                  "get value of $name@sp+$offset in $funcname"]
  51             append str "\\s*$name at $addr,?"
  52             if { $name == "blink" } {
  53                 set has_blink 1
  54                 set blink_addr $addr
  55             }
  56         }
  57     }
  58     if { $has_blink == 1 } {
  59         append str "\\s*pc at $blink_addr"
  60     }
  61     return $str
  62 }
  63
  64 # Arguments:
  65 # funcname -    name of function to test
  66 # savedregs -   list of register saved in the frame.  Each entry can be either
  67 #               a string, where it is a register name, or it is a list of two
  68 #               items - name of register and it's offset relatively to SP in
  69 #               the memory.  SP value is at the moment of prologue end.
  70 # fp_offset -   if not an empty string, then proc will test that FP register
  71 #               has a value that is (SP + offset).
  72
  73 proc prologue_test {funcname {savedregs ""} {fp_offset ""} } {
  74     global hex
  75     gdb_breakpoint $funcname temporary
  76     gdb_continue_to_breakpoint $funcname
  77     gdb_test "backtrace 10" \
  78         "#0\[ \t\]*$hex in $funcname .*\r\n#1\[ \t\]*$hex in main.*" \
  79         "backtrace in $funcname"
  80     if { $savedregs != "" } {
  81         set str [saved_regs_to_str $savedregs $funcname]
  82         gdb_test "info frame" \
  83             ".*Saved registers:$str" \
  84             "saved registers in $funcname"
  85     }
  86     if { $fp_offset != "" } {
  87         set sp [get_integer_valueof \$sp -1 "get value of sp in $funcname"]
  88         set fp_val [expr $sp + $fp_offset]
  89         set fp_real_val \
  90             [get_integer_valueof \$fp 0 "get value of fp in $funcname"]
  91         if { $fp_real_val != $fp_val } {
  92             fail "check FP value in $funcname"
  93         } else {
  94             pass "check FP value in $funcname"
  95         }
  96     }
  97 }
  98
  99
 100 prologue_test "standard_prologue" { {r13 0} {r14 4} {r18 8} {blink 12} }
 101 prologue_test "mini_prologue" { {r13 0} {r14 8} {r15 4} {blink 12} }
 102 prologue_test "no_subsp_prologue" { {r13 8} {r20 4} {r25 0} {blink 12} }
 103 prologue_test "leaf_prologue" { {r13 0} {r15 4} }
 104 prologue_test "pushfp_prologue" { {r13 8} {r14 4} {fp 0} } 0
 105 prologue_test "fp_prologue_with_store" { {r13 12} {r14 8} {r15 0} {fp 4} } 4
 106 prologue_test "noncallee_saved_regs_r12_st" { {r12 0} {r13 4} }
 107 # Register offset is specified relatively to SP at the prologue end, so
 108 # "push r12" hasn't been executed at this moment.
 109 prologue_test "noncallee_saved_regs_r12_push" { {r12 0} {r13 4} }
 110 prologue_test "noncallee_saved_regs_r2_push" { {r2 0} {r13 4} }
 111 prologue_test "noncallee_saved_regs_gp_push" { {r25 4} {gp 0} }
 112 prologue_test "noncallee_saved_regs_lp_count" { {r25 4} {lp_count 0} }
 113 prologue_test "noncallee_saved_regs_blink_out_of_prologue" { {r25 8} {gp 4} \
 114     {blink 0}}
 115 # Argument registers are not reported as "saved" regs.
 116 prologue_test "arg_regs_fp" { {r0 12} {r1 8} {r7 4} {r8 0} {fp 16} } 16
 117 prologue_test "arg_regs_fp_mov_s" { {r0 4} {r8 0} {fp 8} } 8
 118 prologue_test "arg_regs_sp" { {r0 0} {r1 4} {r7 8} {r8 12} {r13 16} {r14 20} }
 119 prologue_test "enter_s_nop"
 120 prologue_test "enter_s_blink" { {blink 0} }
 121 prologue_test "enter_s_fp" { {fp 0} } 0
 122 # Layout of registers as stored by enter_s doesn't conform to ARC ABI.
 123 prologue_test "enter_s_r13" { {r13 4} {fp 8} {blink 0} } 0
 124 prologue_test "enter_s_r15" { {r13 0} {r14 4} {r15 8} } 0
 125 # This enter_s saves GP, however because it is not a "calle-saved register",
 126 # GDB will not report it as "saved register" (but maybe it should). GP is at
 127 # offset 56.
 128 prologue_test "enter_s_all" { {r13 4} {r14 8} {r15 12} {r16 16} {r17 20} \
 129     {r18 24} {r19 28} {r20 32} {r21 36} {r22 40} {r23 44} {r24 48} {r25 52} \
 130     {gp 56} {fp 60} {blink 0} } 0
 131
 132 # Test more levels of backtrace.
 133 gdb_breakpoint nested_prologue_inner temporary
 134 gdb_continue_to_breakpoint nested_prologue_inner
 135 gdb_test "backtrace 10" \
 136     "#0\[ \t\]*$hex in nested_prologue_inner .*\r\n#1\[ \t\]*$hex in nested_prologue_outer .*\r\n#2\[ \t\]*$hex in main.*" \
 137     "backtrace in nested_prologue_inner"
 138 set regs [saved_regs_to_str {r13 r18} "nested_prologue_inner"]
 139 gdb_test "info frame" ".*Saved registers:$regs" \
 140     "saved registers in nested_prologue_inner"
 141 set regs [saved_regs_to_str {r14 r15 blink} "nested_prologue_inner"]
 142 gdb_test "info frame 1" ".*Saved registers:$regs" \
 143     "saved registers in nested_prologue_outer"
 144
 145 # sub sp,sp for local variables is part of prologue, hence should be added to
 146 # all of those offsets.
 147 prologue_test "max_length_prologue" { {r0 72} {r1 76} {r2 80} {r3 84} {r4 88} \
 148     {r5 92} {r6 96} {r7 100} {r13 20} {r14 24} {r15 28} {r16 32} \
 149     {r17 36} {r18 40} {r19 44} {r20 48} {r21 52} {r22 56} {r23 60} {r24 64} \
 150     {r25 68} {fp 16} {blink 104} }
 151
 152 prologue_test "branch_in_prologue" { {r13 0} }
 153 prologue_test "cond_branch_in_prologue" { {r13 4} }
 154 prologue_test "jump_in_prologue" { {r13 0} }
 155 prologue_test "cond_jump_in_prologue" { {r13 4} }
 156 prologue_test "predicated_insn" { {r13 8} {r15 0} }
 157 prologue_test "loop_in_prologue" { {r25 4} {lp_count 0} }
 158 prologue_test "store_constant" { {r13 8} {r14 4} }
 159 prologue_test "st_c_limm" { {r15 0} }
 160 prologue_test "st_ab_writeback" { {r13 8} {r14 4} {r15 0} }
 161 prologue_test "st_as_writeback" { {r13 8} {r14 4} {r15 0} }
 162 prologue_test "sth_as_writeback" { {r13 8} {r15 0} }
 163 prologue_test "std_as_writeback" { {r13 12} {r14 4} {r15 8} {r16 0} }
 164 prologue_test "st_halfword" { {r13 8} {r15 0} }
 165 prologue_test "sts_halfword" { {r13 8} {r15 0} }
 166 prologue_test "st_byte" { {r13 8} {r15 0} }
 167 prologue_test "sts_byte" { {r13 8} {r15 0} }
 168 prologue_test "sts_byte_sp" { {r13 8} {r15 0} }
 169 prologue_test "st_double" { {r14 16} {r15 20} {r18 8} {r19 12}}
 170 prologue_test "r_relative_store" { {r13 8} {r14 4} {r15 0} }
 171 prologue_test "r_relative_sub_store" { {r13 8} {r14 4} {r15 0} }
 172 prologue_test "r_relative_store_st_s" { {r13 8} {r14 0} {r15 4} }
 173 prologue_test "r_relative_store_unknown" { {r13 8} }
 174 prologue_test "st_s_r0gp" { {r13 8} }
 175 prologue_test "push_s_prologue" { {r0 28} {r1 16} {r2 4} {r3 24} {r12 32} \
 176     {r13 20} {r14 12} {r15 8} {blink 0}}
 177 prologue_test "sub_s_cbu3" { {r13 4} {r14 0} }
 178 prologue_test "sub_s_bbc" { {r1 4} {r13 12} {r14 0} }
 179 prologue_test "sub_s_bbu5" { {r13 8} {r14 0} }
 180 prologue_test "sub_0bc" { {r13 4} {r14 0} }
 181 prologue_test "sub_alimmb" { {r13 4} {r14 0} }
 182 prologue_test "sub_s_ne_bbb" { {r13 0} }
 183 prologue_test "mov_limm" { {r13 4} {r14 0} }
 184 prologue_test "mov0c_limm" { {r13 4} {r14 0} }
 185 prologue_test "mov_s_hs3" { {r13 4} {r14 0} }
 186 prologue_test "mov_s_bu8" { {r13 4} {r14 0} }
 187 prologue_test "mov_s_ne_bh" { {r13 0} }
 188 prologue_test "unstored_reg" { {r13 0} {r14 4} }
 189 prologue_test "double_store" { {r14 0} }
 190
 191 # alloca() tests
 192 gdb_breakpoint alloca_inner temporary
 193 gdb_continue_to_breakpoint alloca_inner
 194 gdb_test "backtrace 3" \
 195     "#0\[ \t\]*$hex in alloca_inner .*\r\n#1\[ \t\]*$hex in alloca_outer .*\r\n#2\[ \t\]*$hex in main.*" \
 196     "backtrace in alloca_inner"
 197 set regs [saved_regs_to_str {r13 r14} alloca_inner]
 198 gdb_test "info frame 0" ".*Saved registers:$regs" \
 199     "saved registers in alloca_inner"
 200 set regs [saved_regs_to_str {fp blink} alloca_inner]
 201 gdb_test "info frame 1" ".*Saved registers:$regs" \
 202     "saved registers in alloca_outer"
 203