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      1 # Copyright 2019-2024 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 
     16 # Check that GDB can call C++ functions whose parameters have
     17 # object type, and are either passed by value or implicitly by reference.
     18 #
     19 # This is a companion test to pass-by-ref.exp.  In this test, the input
     20 # is manually-written.  In pass-by-ref.exp, the test input is generated.
     21 #
     22 # We include tests for classes that
     23 # - contain arrays as fields,
     24 # - are dynamic (i.e. have virtual methods)
     25 # - have inlined copy ctor
     26 # - have deleted destructor
     27 
     28 require allow_cplus_tests
     29 
     30 standard_testfile .cc
     31 
     32 set options {debug c++ additional_flags=-std=c++11}
     33 if {[prepare_for_testing "failed to prepare" $testfile $srcfile $options]} {
     34     return -1
     35 }
     36 
     37 if {![runto_main]} {
     38     return -1
     39 }
     40 
     41 # GCC version <= 6 and Clang do not emit DW_AT_defaulted and DW_AT_deleted.
     42 set is_gcc_6_or_older [test_compiler_info {gcc-[0-6]-*}]
     43 set is_clang [test_compiler_info {clang-*}]
     44 
     45 set bp_location [gdb_get_line_number "stop here"]
     46 gdb_breakpoint $bp_location
     47 gdb_continue_to_breakpoint "end of main" ".*return .*;"
     48 
     49 gdb_test "print cbvArrayContainerByVal (arrayContainerByVal)" "6" \
     50     "call cbvArrayContainerByVal"
     51 gdb_test "print arrayContainerByVal.items\[0\].x" "2" \
     52     "cbv argument 'arrayContainerByVal' should not change"
     53 
     54 gdb_test "print cbvArrayContainerByRef (arrayContainerByRef)" "7" \
     55     "call cbvArrayContainerByRef"
     56 gdb_test "print arrayContainerByRef.items\[0\].x" "2" \
     57     "cbv argument 'arrayContainerByRef' should not change"
     58 
     59 gdb_test "print cbvDynamic (dynamic)" "48" \
     60     "call cbvDynamic"
     61 gdb_test "print dynamic.x" "2" \
     62     "cbv argument 'dynamic' should not change"
     63 
     64 set sig "\"Inlined\:\:Inlined\\(.*Inlined const\&\\)\""
     65 gdb_test "print cbvInlined (inlined)" \
     66     "expression cannot be evaluated .* \\(maybe inlined\\?\\)"
     67 
     68 if {$is_gcc_6_or_older || $is_clang} {setup_xfail "*-*-*"}
     69 gdb_test "print cbvDtorDel (*dtorDel)" \
     70     ".* cannot be evaluated .* 'DtorDel' is not destructible" \
     71     "type not destructible"
     72 
     73 # Test that GDB calls the correct copy ctor
     74 gdb_test "print cbvFourCCtor (fourCctor_c0v0)" "13" \
     75     "call cbvFourCCtor, c0v0"
     76 gdb_test "print fourCctor_c0v0.x" "2" \
     77     "cbv argument 'twoCctor_c0v0' should not change"
     78 
     79 gdb_test "print cbvFourCCtor (fourCctor_c1v0)" "14" \
     80     "call cbvFourCCtor, c1v0"
     81 gdb_test "print fourCctor_c1v0.x" "2" \
     82     "cbv argument 'twoCctor_c1v0' should not change"
     83 
     84 gdb_test "print cbvFourCCtor (fourCctor_c0v1)" "15" \
     85     "call cbvFourCCtor, c0v1"
     86 gdb_test "print fourCctor_c0v1.x" "2" \
     87     "cbv argument 'twoCctor_c0v1' should not change"
     88 
     89 gdb_test "print cbvFourCCtor (fourCctor_c1v1)" "16" \
     90     "call cbvFourCCtor, c1v1"
     91 gdb_test "print fourCctor_c1v1.x" "2" \
     92     "cbv argument 'twoCctor_c1v1' should not change"
     93 
     94 gdb_test "print cbvTwoMCtor (twoMctor)" \
     95     ".* cannot be evaluated .* 'TwoMCtor' is not copy constructible" \
     96     "copy ctor is implicitly deleted"
     97 
     98 if {$is_gcc_6_or_older || $is_clang} {setup_xfail "*-*-*"}
     99 gdb_test "print cbvTwoMCtorAndCCtor (twoMctorAndCctor)" "12" \
    100     "call cbvTwoMCtorAndCCtor"
    101 gdb_test "print twoMctorAndCctor.x" "2" \
    102     "cbv argument 'twoMctorAndCtor' should not change"
    103 
    104 # Test that we get a breakpoint from the cctor during infcall and
    105 # we can examine arguments.  This is a test that the dummy frame
    106 # of the copy constructor is set up correctly by the infcall mechanism.
    107 set bp_location [gdb_get_line_number "ByRef-cctor"]
    108 gdb_breakpoint $bp_location
    109 gdb_test "print cbvArrayContainerByRef (arrayContainerByRef)" \
    110     ".*The program being debugged stopped.*" \
    111     "call cbvArrayContainerByRef with BP"
    112 gdb_test "backtrace" [multi_line \
    113     "#0  ByRef\:\:ByRef .* at .*$srcfile:$bp_location" \
    114     "#1  .* ArrayContainerByRef::ArrayContainerByRef .*" \
    115     "#2  <function called from gdb>" \
    116     "#3  main.*"]
    117