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Thrift.qll

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/**

* Provides classes for working with Apache Thrift IDL files.

* This code is under development and may change without warning.

*/

import external.ExternalArtifact

/** An item in the parse tree of the IDL file */

class ThriftElement extends ExternalData {

string kind;

ThriftElement() { this.getDataPath() = "thrift-" + kind }

string getKind() { result = kind }

string getId() { result = this.getField(0) }

int getIndex() { result = this.getFieldAsInt(1) }

ThriftElement getParent() { result.getId() = this.getField(2) }

string getValue() { result = this.getField(3) }

ThriftElement getChild(int n) { result.getIndex() = n and result.getParent() = this }

ThriftElement getAChild() { result = this.getChild(_) }

override string toString() { result = this.getKind() }

string getPath() { result = this.getField(4) }

private int line() { result = this.getFieldAsInt(5) }

private int column() { result = this.getFieldAsInt(6) }

/**

* Holds if this element is at the specified location.

* The location spans column `startcolumn` of line `startline` to

* column `endcolumn` of line `endline` in file `filepath`.

* For more information, see

* [Locations](https://codeql.github.com/docs/writing-codeql-queries/providing-locations-in-codeql-queries/).

*/

predicate hasLocationInfo(

string filepath, int startline, int startcolumn, int endline, int endcolumn

) {

filepath = this.getPath() and

startline = this.line() and

startcolumn = this.column() and

endline = this.line() and

endcolumn = this.column() + this.getValue().length() - 1

or

exists(ThriftElement first, ThriftElement last |

first = this.getChild(min(int l | exists(this.getChild(l)))) and

last = this.getChild(max(int l | exists(this.getChild(l)))) and

first.hasLocationInfo(filepath, startline, startcolumn, _, _) and

last.hasLocationInfo(filepath, _, _, endline, endcolumn)

)

}

File getFile() { this.hasLocationInfo(result.getAbsolutePath(), _, _, _, _) }

}

abstract class ThriftNamedElement extends ThriftElement {

abstract ThriftElement getNameElement();

final string getName() { result = this.getNameElement().getValue() }

override string toString() {

result = this.getKind() + " " + this.getName()

or

not exists(this.getName()) and result = this.getKind() + " ???"

}

override predicate hasLocationInfo(

string filepath, int startline, int startcolumn, int endline, int endcolumn

) {

exists(ThriftElement first |

first = this.getChild(min(int l | exists(this.getChild(l)))) and

first.hasLocationInfo(filepath, startline, startcolumn, _, _) and

this.getNameElement().hasLocationInfo(filepath, _, _, endline, endcolumn)

)

}

}

class ThriftType extends ThriftNamedElement {

ThriftType() { kind.matches("%type") }

override ThriftElement getNameElement() {

result = this.getChild(0)

or

result = this.getChild(0).(ThriftType).getNameElement()

}

override string toString() { result = "type " + this.getName() }

predicate references(ThriftStruct struct) {

this.getName() = struct.getName() and

exists(string path |

this.hasLocationInfo(path, _, _, _, _) and

struct.hasLocationInfo(path, _, _, _, _)

)

}

}

/** A thrift typedef */

class ThriftTypeDef extends ThriftNamedElement {

ThriftTypeDef() { kind = "typedef" }

override ThriftElement getNameElement() { result = this.getChild(2).getChild(0) }

}

/** A thrift enum declaration */

class ThriftEnum extends ThriftNamedElement {

ThriftEnum() { kind = "enum" }

override ThriftElement getNameElement() { result = this.getChild(0).getChild(0) }

}

/** A thrift enum field */

class ThriftEnumField extends ThriftNamedElement {

ThriftEnumField() { kind = "enumfield" }

override ThriftElement getNameElement() { result = this.getChild(0).getChild(0) }

}

/** A thrift service declaration */

class ThriftService extends ThriftNamedElement {

ThriftService() { kind = "service" }

override ThriftElement getNameElement() { result = this.getChild(0).getChild(0) }

ThriftFunction getAFunction() { result = this.getChild(_) }

ThriftFunction getFunction(string name) {

result.getName() = name and

result = this.getAFunction()

}

}

/** A thrift function declaration */

class ThriftFunction extends ThriftNamedElement {

ThriftFunction() { kind = "function" }

override ThriftElement getNameElement() { result = this.getChild(2).getChild(0) }

ThriftField getArgument(int n) { result = this.getChild(n + 3) }

ThriftField getAnArgument() { result = this.getArgument(_) }

private ThriftThrows getAllThrows() { result = this.getChild(_) }

ThriftField getAThrows() { result = this.getAllThrows().getAChild() }

ThriftType getReturnType() { result = this.getChild(1).getChild(0) }

override predicate hasLocationInfo(

string filepath, int startline, int startcolumn, int endline, int endcolumn

) {

this.getChild(1).hasLocationInfo(filepath, startline, startcolumn, _, _) and

this.getChild(2).hasLocationInfo(filepath, _, _, endline, endcolumn)

}

ThriftService getService() { result.getAFunction() = this }

string getQualifiedName() { result = this.getService().getName() + "." + this.getName() }

}

class ThriftField extends ThriftNamedElement {

ThriftField() { kind = "field" }

override ThriftElement getNameElement() { result = this.getChild(4) }

ThriftType getType() { result = this.getChild(2) }

}

class ThriftStruct extends ThriftNamedElement {

ThriftStruct() { kind = "struct" }

override ThriftElement getNameElement() { result = this.getChild(0).getChild(0) }

ThriftField getMember(int n) { result = this.getChild(n + 1) }

ThriftField getAMember() { result = this.getMember(_) }

}

class ThriftException extends ThriftNamedElement {

ThriftException() { kind = "exception" }

override ThriftElement getNameElement() { result = this.getChild(0).getChild(0) }

ThriftField getMember(int n) { result = this.getChild(n + 1) }

ThriftField getAMember() { result = this.getMember(_) }

}

class ThriftThrows extends ThriftElement {

ThriftThrows() { kind = "throws" }

ThriftField getAThrows() { result = this.getChild(_) }

}

/** A parse tree element that holds a primitive value */

class ThriftValue extends ThriftElement {

ThriftValue() { exists(this.getValue()) }

override string toString() { result = this.getKind() + " " + this.getValue() }

}