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GP-3649 - DemangledObjects - separate lref/rref from pointerLeverls; fix MDMang function pointers indirection

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This commit is contained in:
ghizard 2023-07-19 14:28:53 -04:00
parent edc6c52094
commit 9f5cfa5170
6 changed files with 153 additions and 63 deletions
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30
Ghidra/Features/Base/src/main/java/ghidra/app/util/demangler/AbstractDemangledFunctionDefinitionDataType.java
View file

@ -227,13 +227,21 @@ public abstract class AbstractDemangledFunctionDefinitionDataType extends Demang
StringBuilder typeBuffer = new StringBuilder();
int pointerLevels = getPointerLevels();
if (pointerLevels > 0) {
if (pointerLevels > 0 || isReference() || isRValueReference()) {
addParentName(typeBuffer);
for (int i = 0; i < pointerLevels; ++i) {
typeBuffer.append(getTypeString());
}
// kludge for now... current type-emitting mechanism in DemangledObject hierarchy
// lacks a lot... needs revamped.
if (isLValueReference()) {
typeBuffer.append(" &");
}
else if (isRValueReference()) {
typeBuffer.append(" &&");
}
}
if (!StringUtils.isBlank(typeBuffer)) {
@ -331,7 +339,25 @@ public abstract class AbstractDemangledFunctionDefinitionDataType extends Demang
dt = fddt;
}
return new PointerDataType(dt, dataTypeManager);
// This was also totally wonked in terms of type-emitting. Whole mangled type needs
// gone through and revamped; not sure it is good to have pointer levels or reference
// information in a FunctionPointer... need to investigate more.
int numPointers = getPointerLevels();
for (int i = 0; i < numPointers; ++i) {
dt = PointerDataType.getPointer(dt, dataTypeManager);
}
if (isLValueReference()) {
// Placeholder in prep for more lref work
dt = PointerDataType.getPointer(dt, dataTypeManager);
}
else if (isRValueReference()) {
// Placeholder in prep for more rref work
dt = PointerDataType.getPointer(dt, dataTypeManager);
}
return dt;
}
private void setParameters(FunctionDefinitionDataType fddt, DataTypeManager dataTypeManager) {

47
Ghidra/Features/Base/src/main/java/ghidra/app/util/demangler/DemangledDataType.java
View file

@ -47,6 +47,7 @@ public class DemangledDataType extends DemangledType {
public static final String ARR_NOTATION = "[]";
public static final String REF_NOTATION = "&";
public static final String RIGHT_REF_NOTATION = "&&";
public static final String PTR_NOTATION = "*";
public static final String VOLATILE = "volatile";
@ -100,7 +101,10 @@ public class DemangledDataType extends DemangledType {
private boolean isComplex;
private boolean isEnum;
private boolean isPointer64;
private boolean isReference;
// Cannot be both lref and rref. Prior to C++11, we only had reference (& operator).
// This is now distinguished as left-value reference (l-value reference or lref), and there
// is now an additional right-value reference (r-value reference or rref) with the && operator.
private boolean isLValueReference;
private boolean isRValueReference;
private boolean isSigned;
private boolean isStruct;
@ -208,13 +212,20 @@ public class DemangledDataType extends DemangledType {
}
int numPointers = getPointerLevels();
if (isReference()) {
numPointers++;
}
for (int i = 0; i < numPointers; ++i) {
dt = PointerDataType.getPointer(dt, dataTypeManager);
}
if (isLValueReference()) {
// Placeholder in prep for more lref work
dt = PointerDataType.getPointer(dt, dataTypeManager);
}
else if (isRValueReference()) {
// Placeholder in prep for more rref work
dt = PointerDataType.getPointer(dt, dataTypeManager);
}
return dt;
}
@ -463,7 +474,13 @@ public class DemangledDataType extends DemangledType {
}
public void setReference() {
isReference = true;
setLValueReference();
}
public void setLValueReference() {
isLValueReference = true;
// Cannot be both
isRValueReference = false;
}
/**
@ -471,6 +488,8 @@ public class DemangledDataType extends DemangledType {
*/
public void setRValueReference() {
isRValueReference = true;
// Cannot be both
isLValueReference = false;
}
public void setSigned() {
@ -550,7 +569,15 @@ public class DemangledDataType extends DemangledType {
}
public boolean isReference() {
return isReference;
return isLValueReference() || isRValueReference();
}
public boolean isLValueReference() {
return isLValueReference;
}
public boolean isRValueReference() {
return isRValueReference;
}
public boolean isSigned() {
@ -697,11 +724,11 @@ public class DemangledDataType extends DemangledType {
buffer.append(SPACE + PTR_NOTATION);
}
if (isReference) {
if (isLValueReference) {
buffer.append(SPACE + REF_NOTATION);
if (isRValueReference) {
buffer.append(REF_NOTATION); // &&
}
}
else if (isRValueReference) {
buffer.append(SPACE + RIGHT_REF_NOTATION);
}
// the order of __ptr64 and __restrict can vary--with fuzzing...

4
Ghidra/Features/GnuDemangler/src/main/java/ghidra/app/util/demangler/gnu/GnuDemanglerParser.java
View file

@ -870,7 +870,7 @@ public class GnuDemanglerParser {
}
else if (ch == '&') {
if (!dt.isReference()) {
dt.setReference();
dt.setLValueReference();
}
else {
dt.setRValueReference();
@ -1286,7 +1286,7 @@ public class GnuDemanglerParser {
dt.incrementPointerLevels();
}
else if (type.equals("&")) {
dt.setReference();
dt.setLValueReference();
}
else {
throw new DemanglerParseException("Unexpected charater inside of parens: " + type);

12
Ghidra/Features/GnuDemangler/src/test/java/ghidra/app/util/demangler/GnuDemanglerParserTest.java
View file

@ -1927,8 +1927,18 @@ public class GnuDemanglerParserTest extends AbstractGenericTest {
assertName(object, name, "WebCore", "TextCodecICU");
String signature = object.getSignature(false);
// 20230719: Note that argument in the following function is not correctly parsed.
// The argument is a non-pointer/ref reference to a function that returns void and
// which takes the argument list shown. Parser looks for double closing parenthesis,
// but that is found on the last argument of the template parameter. It actually needed
// to find the last closing parethesis and know that there could be nested pairs.
// Modification on 20230719 has "(* &&)" emitted in place of "(*)" because of lref/rref
// work in GP-3649, but the "&&" was found due to the closing parenthesis issue, which
// already existed.
// TODO: needs fixed
assertEquals(
"undefined WebCore::TextCodecICU::registerCodecs(void (*)(char const *,WTF::Function<std::__1::unique_ptr<WebCore::TextCodec,std::__1::default_delete<WebCore::TextCodec>> ()> &&))",
"undefined WebCore::TextCodecICU::registerCodecs(void (* &&)(char const *,WTF::Function<std::__1::unique_ptr<WebCore::TextCodec,std::__1::default_delete<WebCore::TextCodec>> ()> &&))",
signature);
}

24
Ghidra/Features/MicrosoftDemangler/src/test/java/ghidra/app/plugin/core/analysis/MicrosoftDemanglerAnalyzerTest.java
View file

@ -26,6 +26,7 @@ import ghidra.framework.options.Options;
import ghidra.program.database.ProgramBuilder;
import ghidra.program.database.ProgramDB;
import ghidra.program.model.address.Address;
import ghidra.program.model.data.ParameterDefinition;
import ghidra.program.model.listing.*;
import ghidra.program.model.symbol.SourceType;
import ghidra.test.AbstractGhidraHeadedIntegrationTest;
@ -97,6 +98,29 @@ public class MicrosoftDemanglerAnalyzerTest extends AbstractGhidraHeadedIntegrat
assertEquals("undefined InvokeHelperV(void)", function.getSignature().toString());
}
@Test
public void testApplyComplicatedFunctionSignatureHavingReference() throws Exception {
String mangled = "?f2@@YAP6AP6AHH@ZP6ADD@Z@ZAAP6AP6AHH@Z0@Z@Z";
Address addr = addr("0x110");
createSymbol(addr, mangled);
analyze();
FunctionManager fm = program.getFunctionManager();
Function function = fm.getFunctionAt(addr);
assertNotNull(function);
ParameterDefinition[] params = function.getSignature().getArguments();
assertEquals(1, params.length);
ParameterDefinition param = params[0];
assertEquals("_func__func_int_int_ptr__func_char_char_ptr * * param_1",
param.toString());
assertEquals(
"_func__func_int_int_ptr__func_char_char_ptr * f2(_func__func_int_int_ptr__func_char_char_ptr * * param_1)",
function.getSignature().toString());
}
//==================================================================================================
// Private Methods
//==================================================================================================

33
Ghidra/Features/MicrosoftDmang/src/main/java/mdemangler/MDMangGhidra.java
View file

@ -452,7 +452,8 @@ public class MDMangGhidra extends MDMang {
}
private DemangledFunctionReference processDemangledFunctionReference(MDModifierType refType) {
if (!((refType instanceof MDReferenceType) || (refType instanceof MDDataRightReferenceType))) {
if (!((refType instanceof MDReferenceType) ||
(refType instanceof MDDataRightReferenceType))) {
return null; // Not planning on anything else yet.
}
DemangledFunctionReference functionReference =
@ -610,18 +611,19 @@ public class MDMangGhidra extends MDMang {
// modifierType.getArrayString();
// resultDataType.setArray();
//Processing the referenced type (for Ghidra, and then setting attributes on it)
processDataType(resultDataType, (MDDataType) modifierType.getReferencedType());
resultDataType.incrementPointerLevels();
DemangledDataType newResult =
processDataType(resultDataType, (MDDataType) modifierType.getReferencedType());
newResult.incrementPointerLevels();
if (modifierType.getCVMod().isConst()) {
resultDataType.setConst();
newResult.setConst();
}
if (modifierType.getCVMod().isVolatile()) {
resultDataType.setVolatile();
newResult.setVolatile();
}
if (modifierType.getCVMod().isPointer64()) {
resultDataType.setPointer64();
newResult.setPointer64();
}
return resultDataType;
return newResult;
}
// TODO: fix. Following is a kludge because DemangledObject has no
// DemangledReference
@ -648,18 +650,19 @@ public class MDMangGhidra extends MDMang {
return fr;
}
//Processing the referenced type (for Ghidra, and then setting attributes on it)
processDataType(resultDataType, (MDDataType) modifierType.getReferencedType());
resultDataType.setReference(); // Not sure if we should do/use this.
DemangledDataType newResult =
processDataType(resultDataType, (MDDataType) modifierType.getReferencedType());
newResult.setLValueReference();
if (modifierType.getCVMod().isConst()) {
resultDataType.setConst();
newResult.setConst();
}
if (modifierType.getCVMod().isVolatile()) {
resultDataType.setVolatile();
newResult.setVolatile();
}
if (modifierType.getCVMod().isPointer64()) {
resultDataType.setPointer64();
newResult.setPointer64();
}
return resultDataType;
return newResult;
}
// TODO: fix. Following is a kludge because DemangledObject has no DemangledReference
// with corresponding referencedType.
@ -725,7 +728,7 @@ public class MDMangGhidra extends MDMang {
}
//Processing the referenced type (for Ghidra, and then setting attributes on it)
processDataType(resultDataType, (MDDataType) modifierType.getReferencedType());
resultDataType.setReference(); // Not sure if we should do/use this.
resultDataType.setRValueReference();
if (modifierType.getCVMod().isConst()) {
resultDataType.setConst();
}
@ -808,7 +811,7 @@ public class MDMangGhidra extends MDMang {
}
}
else if (datatype instanceof MDReferenceType) {
resultDataType.setReference();
resultDataType.setLValueReference();
}
else if (datatype instanceof MDArrayBasicType) {
resultDataType.setArray(1);