GP-4528: Fix byte values in trace diff view

Ghidra/Debug/Framework-TraceModeling/src/test/java/ghidra/trace/database/program/DBTraceProgramViewListingTest.java

@@ -15,7 +15,7 @@
  */
 package ghidra.trace.database.program;
 
-import static ghidra.lifecycle.Unfinished.*;
+import static ghidra.lifecycle.Unfinished.TODO;
 import static org.junit.Assert.*;
 
 import java.io.IOException;
@@ -42,8 +42,8 @@ public class DBTraceProgramViewListingTest extends AbstractGhidraHeadlessIntegra
 
 	ToyDBTraceBuilder b;
 
-	DBTraceProgramView view;
-	DBTraceProgramViewListing listing; // TODO: Do I want to expose the internal types?
+	DBTraceVariableSnapProgramView view;
+	DBTraceProgramViewListing listing;
 	DBTraceMemoryManager memory;
 	DBTraceCodeManager code;
 
@@ -878,4 +878,22 @@ public class DBTraceProgramViewListingTest extends AbstractGhidraHeadlessIntegra
 		assertEquals(i4005, listing.getDefinedCodeUnitBefore(b.addr(0x4006)));
 		assertEquals(d4000, listing.getDefinedCodeUnitBefore(b.addr(0x4005)));
 	}
+
+	@Test
+	public void testGetCodeUnitsInTwoViews() throws Throwable {
+		try (Transaction tx = b.startTransaction()) {
+			memory.putBytes(0, b.addr(0x00400000), b.buf(1, 2, 3, 4, 5, 6, 7, 8));
+			memory.putBytes(1, b.addr(0x00400000), b.buf(8, 7, 6, 5, 4, 3, 2, 1));
+		}
+
+		view.setSnap(1);
+		DBTraceProgramView view0 = b.trace.getFixedProgramView(0);
+		DBTraceProgramViewListing listing0 = view0.getListing();
+
+		CodeUnit cu0 = listing0.getCodeUnitAt(b.addr(0x00400000));
+		CodeUnit cu1 = listing.getCodeUnitAt(b.addr(0x00400000));
+
+		assertArrayEquals(b.arr(1), cu0.getBytes());
+		assertArrayEquals(b.arr(8), cu1.getBytes());
+	}
 }

Ghidra/Debug/Framework-TraceModeling/src/test/java/ghidra/trace/database/program/DBTraceProgramViewMemoryTest.java

@@ -23,7 +23,8 @@ import org.junit.*;
 
 import db.Transaction;
 import ghidra.program.database.ProgramBuilder;
-import ghidra.program.model.address.*;
+import ghidra.program.model.address.AddressSet;
+import ghidra.program.model.address.AddressSpace;
 import ghidra.program.model.lang.LanguageNotFoundException;
 import ghidra.program.model.mem.MemoryBlock;
 import ghidra.test.AbstractGhidraHeadlessIntegrationTest;
@@ -31,50 +32,47 @@ import ghidra.trace.database.ToyDBTraceBuilder;
 import ghidra.trace.database.memory.DBTraceMemoryManager;
 import ghidra.trace.database.memory.DBTraceMemoryRegion;
 import ghidra.trace.model.memory.TraceMemoryFlag;
-import ghidra.trace.model.memory.TraceOverlappedRegionException;
-import ghidra.util.exception.DuplicateNameException;
 
 public class DBTraceProgramViewMemoryTest extends AbstractGhidraHeadlessIntegrationTest {
 
-	ToyDBTraceBuilder b;
+	ToyDBTraceBuilder tb;
 
-	DBTraceProgramView view;
+	DBTraceVariableSnapProgramView view;
 	DBTraceProgramViewMemory vmem;
 	DBTraceMemoryManager memory;
 
 	@Before
 	public void setUpTraceProgramViewMemoryTest() throws LanguageNotFoundException, IOException {
-		b = new ToyDBTraceBuilder("Testing", ProgramBuilder._TOY64_BE);
-		try (Transaction tx = b.startTransaction()) {
-			b.trace.getTimeManager().createSnapshot("Created");
+		tb = new ToyDBTraceBuilder("Testing", ProgramBuilder._TOY64_BE);
+		try (Transaction tx = tb.startTransaction()) {
+			tb.trace.getTimeManager().createSnapshot("Created");
 		}
-		memory = b.trace.getMemoryManager();
+		memory = tb.trace.getMemoryManager();
 		// NOTE: First snap has to exist first
-		view = b.trace.getProgramView();
+		view = tb.trace.getProgramView();
 		vmem = view.getMemory();
 	}
 
 	@After
 	public void tearDownTraceProgramViewListingTest() {
-		if (b != null) {
-			b.close();
+		if (tb != null) {
+			tb.close();
 		}
 	}
 
 	@Test
-	public void testBlockInOverlay() throws DuplicateNameException, TraceOverlappedRegionException,
-			AddressOutOfBoundsException {
+	public void testBlockInOverlay() throws Throwable {
 		AddressSpace os;
 		DBTraceMemoryRegion io;
-		try (Transaction tx = b.startTransaction()) {
+		try (Transaction tx = tb.startTransaction()) {
 			os = memory.createOverlayAddressSpace("test",
-				b.trace.getBaseAddressFactory().getDefaultAddressSpace());
-			io = (DBTraceMemoryRegion) memory.createRegion(".io", 0, b.range(os, 0x1000, 0x1fff),
+				tb.trace.getBaseAddressFactory().getDefaultAddressSpace());
+			io = (DBTraceMemoryRegion) memory.createRegion(".io", 0, tb.range(os, 0x1000, 0x1fff),
 				TraceMemoryFlag.READ, TraceMemoryFlag.WRITE, TraceMemoryFlag.VOLATILE);
 		}
 
 		AddressSet asSet = new AddressSet(vmem);
-		assertEquals(b.set(b.range(os, 0x1000, 0x1fff)), asSet);
+		assertEquals(tb.set(tb.range(os, 0x1000, 0x1fff)), asSet);
 
 		MemoryBlock[] blocks = vmem.getBlocks();
 		assertEquals(1, blocks.length);
@@ -82,7 +80,26 @@ public class DBTraceProgramViewMemoryTest extends AbstractGhidraHeadlessIntegrat
 		MemoryBlock blk = blocks[0];
 		assertSame(blk, vmem.getRegionBlock(io));
 		assertEquals(".io", blk.getName());
-		assertEquals(b.addr(os, 0x1000), blk.getStart());
-		assertEquals(b.addr(os, 0x1fff), blk.getEnd());
+		assertEquals(tb.addr(os, 0x1000), blk.getStart());
+		assertEquals(tb.addr(os, 0x1fff), blk.getEnd());
+	}
+
+	@Test
+	public void testBytesInTwoViews() throws Throwable {
+		try (Transaction tx = tb.startTransaction()) {
+			memory.putBytes(0, tb.addr(0x00400000), tb.buf(1, 2, 3, 4, 5, 6, 7, 8));
+			memory.putBytes(1, tb.addr(0x00400000), tb.buf(8, 7, 6, 5, 4, 3, 2, 1));
+		}
+
+		view.setSnap(1);
+		DBTraceProgramView view0 = tb.trace.getFixedProgramView(0);
+
+		byte[] actual = new byte[8];
+
+		view0.getMemory().getBytes(tb.addr(0x00400000), actual);
+		assertArrayEquals(tb.arr(1, 2, 3, 4, 5, 6, 7, 8), actual);
+
+		view.getMemory().getBytes(tb.addr(0x00400000), actual);
+		assertArrayEquals(tb.arr(8, 7, 6, 5, 4, 3, 2, 1), actual);
 	}
 }

Ghidra/Features/Base/src/main/java/ghidra/app/util/viewer/field/BytesFieldFactory.java

@@ -24,6 +24,8 @@ package ghidra.app.util.viewer.field;
 import java.awt.Color;
 import java.math.BigInteger;
 
+import org.apache.commons.lang3.ArrayUtils;
+
 import docking.widgets.fieldpanel.field.*;
 import docking.widgets.fieldpanel.support.FieldLocation;
 import docking.widgets.fieldpanel.support.RowColLocation;
@@ -35,8 +37,6 @@ import ghidra.framework.options.ToolOptions;
 import ghidra.program.model.data.DataType;
 import ghidra.program.model.data.Structure;
 import ghidra.program.model.listing.*;
-import ghidra.program.model.mem.Memory;
-import ghidra.program.model.mem.MemoryAccessException;
 import ghidra.program.util.BytesFieldLocation;
 import ghidra.program.util.ProgramLocation;
 import ghidra.util.HelpLocation;
@@ -168,45 +168,25 @@ public class BytesFieldFactory extends FieldFactory {
 
 	@Override
 	public ListingField getField(ProxyObj<?> proxy, int varWidth) {
-		Object obj = proxy.getObject();
-		if (!enabled || !(obj instanceof CodeUnit)) {
+		if (!enabled || !(proxy.getObject() instanceof CodeUnit cu)) {
 			return null;
 		}
 
-		CodeUnit cu = (CodeUnit) obj;
-		int length;
-
 		// Instructions: use prototype length so we display all bytes for length-override case
-		if (cu instanceof Instruction) {
-			// Consider all parsed bytes even if the overlap the next instruction due to the
-			// use of an instruction length-override.
-			length = ((Instruction) cu).getParsedLength();
-		}
-		else {
-			length = Math.min(cu.getLength(), 100);
-		}
+		// Consider all parsed bytes even if the overlap the next instruction due to the
+		// use of an instruction length-override.
+		final int arrLength =
+			cu instanceof Instruction ins ? ins.getParsedLength() : Math.min(cu.getLength(), 100);
 
-		byte[] bytes = new byte[length];
-		Memory memory = cu.getProgram().getMemory();
-		try {
-			length = memory.getBytes(cu.getAddress(), bytes);
-		}
-		catch (MemoryAccessException e) {
-			return null;
-		}
+		byte[] bytes = new byte[arrLength];
+		final int length = cu.getBytes(bytes, 0);
 
 		if (length == 0) {
 			return null;
 		}
 
-		if ((cu instanceof Instruction) && reverseInstByteOrdering && !memory.isBigEndian()) {
-			int i = 0;
-			int j = length - 1;
-			while (j > i) {
-				byte b = bytes[i];
-				bytes[i++] = bytes[j];
-				bytes[j--] = b;
-			}
+		if ((cu instanceof Instruction) && reverseInstByteOrdering && !cu.isBigEndian()) {
+			ArrayUtils.reverse(bytes);
 		}
 
 		int groupLength = length / byteGroupSize;

Ghidra/Test/DebuggerIntegrationTest/src/screen/java/ghidraclass/debugger/screenshot/TutorialDebuggerScreenShots.java

@@ -691,7 +691,7 @@ public class TutorialDebuggerScreenShots extends GhidraScreenShotGenerator
 		});
 		waitForCondition(() -> actionNextDiff.isEnabled());
 		flatDbg.goToDynamic(secTermminesData.getStart());
-		// Because auto-strack is a little broken right now
+		// Because auto-track is a little broken right now
 		Thread.sleep(500);
 		flatDbg.goToDynamic(secTermminesData.getStart());