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Merge remote-tracking branch 'origin/GP-4568_emteere_CodeUnitByteLocking--SQUASHED'

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This commit is contained in:
Ryan Kurtz 2024-05-01 08:09:43 -04:00
commit 8163d9f912
1 changed files with 42 additions and 50 deletions
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92
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/code/CodeUnitDB.java
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@ -622,65 +622,54 @@ abstract class CodeUnitDB extends DatabaseObject implements CodeUnit, ProcessorC
@Override
public int getBytes(byte[] b, int offset) {
lock.acquire();
try {
checkIsValid();
populateByteArray();
if (offset < 0 || (offset + b.length) > bytes.length) {
return program.getMemory().getBytes(address.add(offset), b);
}
System.arraycopy(bytes, offset, b, 0, b.length);
refreshIfNeeded();
byte localBytes[] = populateByteArray();
if (offset >= 0 && (offset + b.length) <= localBytes.length) {
System.arraycopy(localBytes, offset, b, 0, b.length);
return b.length;
}
catch (AddressOutOfBoundsException | MemoryAccessException e) {
return 0;
try {
return program.getMemory().getBytes(address.add(offset), b);
}
finally {
lock.release();
catch (MemoryAccessException | AddressOutOfBoundsException e) {
return 0;
}
}
@Override
public byte[] getBytes() throws MemoryAccessException {
lock.acquire();
try {
checkIsValid();
populateByteArray();
int len = getLength();
byte[] b = new byte[len];
if (bytes.length < len) {
if (program.getMemory().getBytes(address, b) != len) {
throw new MemoryAccessException("Couldn't get all bytes for CodeUnit");
}
}
else {
System.arraycopy(bytes, 0, b, 0, b.length);
}
refreshIfNeeded();
byte localBytes[] = populateByteArray();
int locallen = getLength();
if (localBytes.length >= locallen ) {
byte[] b = new byte[locallen];
System.arraycopy(localBytes, 0, b, 0, b.length);
return b;
}
finally {
lock.release();
int len = getLength();
byte[] b = new byte[len];
if (program.getMemory().getBytes(address, b) != len) {
throw new MemoryAccessException("Couldn't get all bytes for CodeUnit");
}
return b;
}
@Override
public byte getByte(int offset) throws MemoryAccessException {
lock.acquire();
try {
checkIsValid();
populateByteArray();
if (offset < 0 || offset >= bytes.length) {
try {
return program.getMemory().getByte(address.add(offset));
}
catch (AddressOutOfBoundsException e) {
throw new MemoryAccessException(e.getMessage());
}
}
return bytes[offset];
refreshIfNeeded();
byte localBytes[] = populateByteArray();
if (offset >= 0 && offset < localBytes.length) {
return localBytes[offset];
}
finally {
lock.release();
try {
return program.getMemory().getByte(address.add(offset));
}
catch (AddressOutOfBoundsException e) {
throw new MemoryAccessException(e.getMessage());
}
}
@ -785,24 +774,27 @@ abstract class CodeUnitDB extends DatabaseObject implements CodeUnit, ProcessorC
}
}
private void populateByteArray() {
if (bytes != null) {
return;
private byte[] populateByteArray() {
byte[] localBytes = bytes;
if (localBytes != null) {
return localBytes;
}
int cacheLength = getPreferredCacheLength();
bytes = new byte[cacheLength];
localBytes = new byte[cacheLength];
if (cacheLength != 0) {
int nbytes = 0;
try {
nbytes = program.getMemory().getBytes(address, bytes);
nbytes = program.getMemory().getBytes(address, localBytes);
}
catch (MemoryAccessException e) {
// ignore
}
if (nbytes != bytes.length) {
bytes = new byte[0];
if (nbytes != localBytes.length) {
localBytes = new byte[0];
}
}
bytes = localBytes;
return localBytes;
}
protected int getPreferredCacheLength() {