Vendor things

third-party/vendor/object/tests/round_trip/macho.rs

@@ -0,0 +1,64 @@
+use object::read::macho::MachHeader;
+use object::read::{Object, ObjectSection};
+use object::{macho, read, write, Architecture, BinaryFormat, Endianness};
+
+// Test that segment size is valid when the first section needs alignment.
+#[test]
+fn issue_286_segment_file_size() {
+    let mut object = write::Object::new(
+        BinaryFormat::MachO,
+        Architecture::X86_64,
+        Endianness::Little,
+    );
+
+    let text = object.section_id(write::StandardSection::Text);
+    object.append_section_data(text, &[1; 30], 0x1000);
+
+    let bytes = &*object.write().unwrap();
+    let header = macho::MachHeader64::parse(bytes, 0).unwrap();
+    let endian: Endianness = header.endian().unwrap();
+    let mut commands = header.load_commands(endian, bytes, 0).unwrap();
+    let command = commands.next().unwrap().unwrap();
+    let (segment, _) = command.segment_64().unwrap().unwrap();
+    assert_eq!(segment.vmsize.get(endian), 30);
+    assert_eq!(segment.filesize.get(endian), 30);
+}
+
+// We were emitting section file alignment padding that didn't match the address alignment padding.
+#[test]
+fn issue_552_section_file_alignment() {
+    let mut object = write::Object::new(
+        BinaryFormat::MachO,
+        Architecture::X86_64,
+        Endianness::Little,
+    );
+
+    // The starting file offset is not a multiple of 32 (checked later).
+    // Length of 32 ensures that the file offset of the end of this section is still not a
+    // multiple of 32.
+    let section = object.add_section(vec![], vec![], object::SectionKind::ReadOnlyDataWithRel);
+    object.append_section_data(section, &vec![0u8; 32], 1);
+
+    // Address is already aligned correctly, so there must not any padding,
+    // even though file offset is not aligned.
+    let section = object.add_section(vec![], vec![], object::SectionKind::ReadOnlyData);
+    object.append_section_data(section, &vec![0u8; 1], 32);
+
+    let bytes = &*object.write().unwrap();
+    //std::fs::write(&"align.o", &bytes).unwrap();
+    let object = read::File::parse(bytes).unwrap();
+    let mut sections = object.sections();
+
+    let section = sections.next().unwrap();
+    let offset = section.file_range().unwrap().0;
+    // Check file offset is not aligned to 32.
+    assert_ne!(offset % 32, 0);
+    assert_eq!(section.address(), 0);
+    assert_eq!(section.size(), 32);
+
+    let section = sections.next().unwrap();
+    // Check there is no padding.
+    assert_eq!(section.file_range(), Some((offset + 32, 1)));
+    assert_eq!(section.address(), 32);
+    assert_eq!(section.size(), 1);
+}