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When running test-case gdb.fortran/function-calls.exp with target board unix/gdb:debug_flags=-gdwarf-5, I run into: ... (gdb) PASS: gdb.fortran/function-calls.exp: \ p derived_types_and_module_calls::pass_cart(c) p derived_types_and_module_calls::pass_cart_nd(c_nd)^M ^M Program received signal SIGSEGV, Segmentation fault.^M 0x0000000000400f73 in derived_types_and_module_calls::pass_cart_nd \ (c=<error reading variable: Cannot access memory at address 0xc>) at \ function-calls.f90:130^M 130 pass_cart_nd = ubound(c%d,1,4)^M The program being debugged was signaled while in a function called from GDB.^M GDB has restored the context to what it was before the call.^M To change this behavior use "set unwindonsignal off".^M Evaluation of the expression containing the function^M (derived_types_and_module_calls::pass_cart_nd) will be abandoned.^M (gdb) FAIL: gdb.fortran/function-calls.exp: p ... The problem originates in read_array_type, when reading a DW_TAG_array_type with a dwarf-5 DW_TAG_generic_subrange child. This is not supported, and the fallout of this is that rather than constructing a new array type, the code proceeds to modify the element type. Fix this conservatively by issuing a complaint and bailing out in read_array_type when not being able to construct an array type, such that we have: ... (gdb) maint expand-symtabs function-calls.f90^M During symbol reading: unable to find array range \ - DIE at 0xe1e [in module function-calls]^M During symbol reading: unable to find array range \ - DIE at 0xe1e [in module function-calls]^M (gdb) KFAIL: gdb.fortran/function-calls.exp: no complaints in srcfile \ (PRMS: symtab/27388) ... Tested on x86_64-linux. gdb/ChangeLog: 2021-02-09 Tom de Vries <tdevries@suse.de> PR symtab/27341 * dwarf2/read.c (read_array_type): Return NULL when not being able to construct an array type. Add assert to ensure that element_type is not being modified. gdb/testsuite/ChangeLog: 2021-02-09 Tom de Vries <tdevries@suse.de> PR symtab/27341 * lib/gdb.exp (with_complaints): New proc, factored out of ... (gdb_load_no_complaints): ... here. * gdb.fortran/function-calls.exp: Add test-case.
119 lines
4.3 KiB
Plaintext
119 lines
4.3 KiB
Plaintext
# Copyright 2019-2021 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/> .
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# Exercise passing and returning arguments in Fortran. This test case
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# is based on the GNU Fortran Argument passing conventions.
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if {[skip_fortran_tests]} { return -1 }
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standard_testfile ".f90"
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if {[prepare_for_testing ${testfile}.exp ${testfile} ${srcfile} {debug f90}]} {
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return -1
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}
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with_complaints 5 {
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set cmd "maint expand-symtabs $srcfile"
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set cmd_regexp [string_to_regexp $cmd]
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set re_kfail [concat "During symbol reading:" \
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" unable to find array range"]
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gdb_test_multiple $cmd "no complaints in srcfile" {
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-re -wrap "$re_kfail.*" {
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kfail symtab/27388 $gdb_test_name
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}
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-re "^$cmd_regexp\r\n$gdb_prompt $" {
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pass $gdb_test_name
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}
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}
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}
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if {![runto [gdb_get_line_number "post_init"]]} then {
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perror "couldn't run to breakpoint post_init"
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continue
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}
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# Use inspired by gdb.base/callfuncs.exp.
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gdb_test_no_output "set unwindonsignal on"
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# Baseline: function and subroutine call with no arguments.
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gdb_test "p no_arg()" " = .TRUE."
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gdb_test_no_output "call no_arg_subroutine()"
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# Argument class: literal, inferior variable, convenience variable,
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# function call return value, function.
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# Paragraph 3: Variables are passed by reference.
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gdb_test "p one_arg(.TRUE.)" " = .TRUE."
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gdb_test "p one_arg(untrue)" " = .FALSE."
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gdb_test_no_output "set \$var = .FALSE."
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gdb_test "p one_arg(\$var)" " = .FALSE."
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gdb_test "p one_arg(one_arg(.TRUE.))" " = .TRUE."
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gdb_test "p one_arg(one_arg(.FALSE.))" " = .FALSE."
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gdb_test_no_output "call run(no_arg_subroutine)"
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# Return: constant.
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gdb_test "p return_constant()" " = 17"
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# Return derived type and call a function in a module.
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gdb_test "p derived_types_and_module_calls::build_cart(7,8)" \
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" = \\\( x = 7, y = 8 \\\)"
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# Two hidden arguments. 1. returned string and 2. string length.
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# Paragraph 1.
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gdb_test "p return_string(returned_string_debugger, 40)" ""
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gdb_test "p returned_string_debugger" "'returned in hidden first argument '"
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# Argument type: real(kind=4), complex, array, pointer, derived type,
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# derived type with allocatable, nested derived type.
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# Paragraph 4: pointer.
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gdb_test "p pointer_function(int_pointer)" " = 87"
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# Paragraph 4: array.
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gdb_test "call array_function(integer_array)" " = 17"
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gdb_test "p derived_types_and_module_calls::pass_cart(c)" \
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" = \\\( x = 2, y = 4 \\\)"
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# Allocatable elements in a derived type. Technical report ISO/IEC 15581.
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gdb_test "p derived_types_and_module_calls::pass_cart_nd(c_nd)" " = 4"
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gdb_test "p derived_types_and_module_calls::pass_nested_cart(nested_c)" \
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"= \\\( d = \\\( x = 1, y = 2 \\\), z = 3 \\\)"
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# Result within some tolerance.
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gdb_test "p real4_argument(real4)" " = 3.${decimal}"
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# Paragraph 2. Complex argument and return.
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gdb_test "p complex_argument(fft)" " = \\\(2.${decimal},3.${decimal}\\\)"
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# Function with optional arguments.
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# Paragraph 10: Option reference arguments.
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gdb_test "p sum_some(1,2,3)" " = 6"
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# There is currently no mechanism to call a function without all
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# optional parameters present.
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setup_kfail "gdb/24147" *-*-*
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gdb_test "p sum_some(1,2)" " = 3"
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# Paragraph 10: optional value arguments. There is insufficient DWARF
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# information to reliably make this case work.
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setup_kfail "gdb/24305" *-*-*
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gdb_test "p one_arg_value(10)" " = 10"
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# DW_AT_artificial formal parameters must be passed manually. This
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# assert will fail if the length of the string is wrapped in a pointer.
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# Paragraph 7: Character type.
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gdb_test "p hidden_string_length('arbitrary string', 16)" " = 16"
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# Several arguments.
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gdb_test "p several_arguments(2, 3, 5)" " = 10"
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gdb_test "p mix_of_scalar_arguments(5, .TRUE., 3.5)" " = 9"
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# Calling other functions: Recursive call.
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gdb_test "p fibonacci(6)" " = 8"
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