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Code Issues Releases Wiki Activity

GP-3608: Handling more complex cases of pointer/array combinations

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(#5248)
This commit is contained in:
Ryan Kurtz 2023-09-20 09:14:18 -04:00
parent b25dc180ef
commit dbbfb13a82
2 changed files with 43 additions and 25 deletions
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29
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/DataTypeWriter.java
View file

@ -520,22 +520,31 @@ public class DataTypeWriter {
}
if (componentString == null) {
if (dataType instanceof BitFieldDataType) {
BitFieldDataType bfDt = (BitFieldDataType) dataType;
name += ":" + bfDt.getDeclaredBitSize();
dataType = bfDt.getBaseDataType();
}
else if (dataType instanceof Array) {
Array array = (Array) dataType;
name += getArrayDimensions(array);
dataType = getArrayBaseType(array);
while (true) {
if (dataType instanceof Array array) {
name += "[" + array.getNumElements() + "]";
dataType = array.getDataType();
}
else if (dataType instanceof Pointer pointer) {
DataType elem = pointer.getDataType();
if (elem == null) {
break;
}
name = "*" + name;
dataType = elem;
if (dataType instanceof Array) {
name = "(" + name + ")";
}
}
else {
break;
}
else if (dataType instanceof Pointer ptr &&
getPointerBaseDataType(ptr) instanceof Array array) {
name = "(%s%s)%s".formatted("*".repeat(getPointerDepth(ptr)), name,
getArrayDimensions(array));
dataType = getArrayBaseType(array);
}
DataType baseDataType = getBaseDataType(dataType);

21
Ghidra/Framework/SoftwareModeling/src/test.slow/java/ghidra/program/model/data/DataTypeWriterTest.java
View file

@ -580,14 +580,23 @@ public class DataTypeWriterTest extends AbstractGTest {
@Test
public void testArrayPointerInStructure() throws IOException, CancelledException {
DataType dt = new IntegerDataType();
Array array = new ArrayDataType(dt, 300, dt.getLength());
Pointer ptr1 = PointerDataType.getPointer(array, null);
Array array300 = new ArrayDataType(dt, 300, dt.getLength());
Pointer ptrArray300 = PointerDataType.getPointer(array300, null);
Array array3 = new ArrayDataType(dt, 3, dt.getLength());
Array array2 = new ArrayDataType(array3, 2, array3.getLength());
Pointer ptr0 = PointerDataType.getPointer(array2, null);
Array array12 = new ArrayDataType(ptr0, 12, dt.getLength());
Pointer ptr1 = PointerDataType.getPointer(array12, null);
Pointer ptr2 = PointerDataType.getPointer(ptr1, null);
Pointer ptr3 = PointerDataType.getPointer(ptr2, null);
Pointer ptr4 = PointerDataType.getPointer(ptr3, null);
Pointer ptr5 = PointerDataType.getPointer(ptr4, null);
Structure struct = new StructureDataType("MyStruct", 0);
struct.setDescription("this is my structure");
struct.add(ptr1, "myPtr1", "this is my array pointer");
struct.add(ptr2, "myPtr2", "this is my array pointer pointer");
struct.add(ptrArray300, "something", "this is my array pointer");
struct.add(ptr5, "something", "this is my complex one");
dtWriter.write(struct, TaskMonitor.DUMMY);
@ -597,8 +606,8 @@ public class DataTypeWriterTest extends AbstractGTest {
typedef struct MyStruct MyStruct, *PMyStruct;
struct MyStruct { /* this is my structure */
int (*myPtr1)[300]; /* this is my array pointer */
int (**myPtr2)[300]; /* this is my array pointer pointer */
int (*something)[300]; /* this is my array pointer */
int (*(*****something)[12])[2][3]; /* this is my complex one */
};
""";