138 lines
3.3 KiB
C++
138 lines
3.3 KiB
C++
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2019-2022 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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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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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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#include <cstdint>
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#include <cstdio>
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#include <cstdlib>
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#include <cassert>
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/* A simple structure with a single integer field. Should be returned in
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a register. */
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struct SimpleBase
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{
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SimpleBase (int32_t x) : x (x) {}
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int32_t x;
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};
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/* A simple structure derived from the simple base. Should be returned in
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a register. */
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struct SimpleDerived : public SimpleBase
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{
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SimpleDerived (int32_t x) : SimpleBase (x) {}
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};
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/* A structure derived from the simple base with a non-trivial destructor.
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Should be returned on the stack. */
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struct NonTrivialDestructorDerived : public SimpleBase
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{
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NonTrivialDestructorDerived (int32_t x) : SimpleBase (x) {}
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~NonTrivialDestructorDerived() { x = 1; }
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};
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/* A structure with unaligned fields. Should be returned on the stack. */
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struct UnalignedFields
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{
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UnalignedFields (int32_t x, double y) : x (x), y (y) {}
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int32_t x;
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double y;
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} __attribute__((packed));
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/* A structure with unaligned fields in its base class. Should be
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returned on the stack. */
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struct UnalignedFieldsInBase : public UnalignedFields
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{
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UnalignedFieldsInBase (int32_t x, double y, int32_t x2)
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: UnalignedFields (x, y), x2 (x2) {}
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int32_t x2;
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};
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struct Bitfields
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{
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Bitfields(unsigned int x, unsigned int y)
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: fld(x), fld2(y)
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{}
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unsigned fld : 7;
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unsigned fld2 : 7;
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};
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class Foo
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{
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public:
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SimpleBase
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return_simple_base (int32_t x)
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{
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assert (this->tag == EXPECTED_TAG);
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return SimpleBase (x);
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}
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SimpleDerived
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return_simple_derived (int32_t x)
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{
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assert (this->tag == EXPECTED_TAG);
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return SimpleDerived (x);
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}
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NonTrivialDestructorDerived
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return_non_trivial_destructor (int32_t x)
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{
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assert (this->tag == EXPECTED_TAG);
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return NonTrivialDestructorDerived (x);
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}
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UnalignedFields
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return_unaligned (int32_t x, double y)
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{
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assert (this->tag == EXPECTED_TAG);
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return UnalignedFields (x, y);
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}
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UnalignedFieldsInBase
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return_unaligned_in_base (int32_t x, double y, int32_t x2)
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{
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assert (this->tag == EXPECTED_TAG);
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return UnalignedFieldsInBase (x, y, x2);
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}
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Bitfields
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return_bitfields (unsigned int x, unsigned int y)
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{
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assert (this->tag == EXPECTED_TAG);
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return Bitfields(x, y);
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}
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private:
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/* Use a tag to detect if the "this" value is correct. */
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static const int EXPECTED_TAG = 0xF00F00F0;
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int tag = EXPECTED_TAG;
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};
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int
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main (int argc, char *argv[])
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{
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Foo foo;
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foo.return_simple_base(1);
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foo.return_simple_derived(2);
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foo.return_non_trivial_destructor(3);
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foo.return_unaligned(4, 5);
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foo.return_unaligned_in_base(6, 7, 8);
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foo.return_bitfields(23, 74);
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return 0; // break-here
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}
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