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72aa85a759
* [C++] Add a failing unit test for #7516 (Rare bad buffer content alignment if sizeof(T) != alignof(T)) * [C++] Fix final buffer alignment when using an array of structs * A struct can have an arbitrary size and therefore sizeof(struct) == alignof(struct) does not hold anymore as for value primitives. * This patch fixes this by introducing alignment parameters to various CreateVector*/StartVector calls. * Closes #7516
32 lines
857 B
C++
32 lines
857 B
C++
#include "alignment_test.h"
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#include "flatbuffers/flatbuffer_builder.h"
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#include "alignment_test_generated.h"
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#include "test_assert.h"
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namespace flatbuffers {
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namespace tests {
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void AlignmentTest() {
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FlatBufferBuilder builder;
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BadAlignmentLarge large;
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Offset<OuterLarge> outer_large = CreateOuterLarge(builder, &large);
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BadAlignmentSmall *small;
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Offset<Vector<const BadAlignmentSmall *>> small_offset =
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builder.CreateUninitializedVectorOfStructs(9, &small);
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(void)small; // We do not have to write data to trigger the test failure
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Offset<BadAlignmentRoot> root =
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CreateBadAlignmentRoot(builder, outer_large, small_offset);
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builder.Finish(root);
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Verifier verifier(builder.GetBufferPointer(), builder.GetSize());
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TEST_ASSERT(VerifyBadAlignmentRootBuffer(verifier));
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}
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} // namespace tests
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} // namespace flatbuffers
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