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{
//
Place your python workspace snippets here. Each snippet is defined under a snippet name and has a scope, prefix, body and
//
description. Add comma separated ids of the languages where the snippet is applicable in the scope field. If scope
//
is left empty or omitted, the snippet gets applied to all languages. The prefix is what is
//
used to trigger the snippet and the body will be expanded and inserted. Possible variables are:
//
$1, $2 for tab stops, $0 for the final cursor position, and ${1:label}, ${2:another} for placeholders.
//
Placeholders with the same ids are connected.
//
Example:
//
"Print to console": {
//
"scope": "javascript,typescript",
//
"prefix": "log",
//
"body": [
//
"console.log('$1');",
//
"$2"
//
],
//
"description": "Log output to console"
//
}
"Has relative path"
: {
"scope"
:
"
ql
"
,
"prefix"
:
"
has relative path
"
,
"body"
: [
"
exists($1.getLocation().getFile().getRelativePath())
"
],
"description"
:
"
has relative path
"
,
},
"debug based on location"
: {
"scope"
:
"
ql
"
,
"prefix"
:
"
debug based on location
"
,
"body"
: [
"
$1.getLocation().getFile().getShortName() =
\"
$2
\"
and
"
,
"
$1.getLocation().getStartLine() = $3 and
"
,
],
"description"
:
"
debug based on location
"
,
},
"Exists"
: {
"scope"
:
"
ql
"
,
"prefix"
:
"
exists
"
,
"body"
: [
"
exists(${1:DataFlow::Node node} |
"
,
"
$2
"
,
"
)
"
],
"description"
:
"
Exists clause
"
,
},
"Predicate"
: {
"scope"
:
"
ql
"
,
"prefix"
:
"
predicate
"
,
"body"
: [
"
predicate ${1:isFoo}(${2:DataFlow::Node node}) {
"
,
"
${3:any()}
"
,
"
}
"
],
"description"
:
"
Predicate
"
,
},
"Class"
: {
"scope"
:
"
ql
"
,
"prefix"
:
"
class
"
,
"body"
: [
"
class ${1:MyClass} extends ${2:DataFlow::MethodCallNode} {
"
,
"
$1() { ${3:getMethodName() =
\"
foo
\"
} }
"
,
"
"
,
"
DataFlow::Node ${4:getThing}() { result = ${5:getArgument(0)} }
"
,
"
}
"
],
"description"
:
"
Class
"
,
},
"Abstract class"
: {
"scope"
:
"
ql
"
,
"prefix"
:
"
abstract class
"
,
"body"
: [
"
abstract class ${1:AdditionalThing} extends ${2:DataFlow::Node} {
"
,
"
abstract ${3:DataFlow::Node} ${4:getThing}($5);
"
,
"
}
"
],
"description"
:
"
Class
"
,
},
"Class::Range"
: {
"scope"
:
"
ql
"
,
"prefix"
:
"
range class
"
,
"body"
: [
"
class ${1:MyClass} extends ${2:DataFlow::Node} {
"
,
"
$1::Range range;
"
,
"
"
,
"
$1() { this = range }
"
,
"
"
,
"
${3:DataFlow::Node} ${4:getThing}() { result = range.$4() }
"
,
"
}
"
,
"
"
,
"
module $1 {
"
,
"
abstract class Range extends $2 {
"
,
"
abstract $3 $4();
"
,
"
}
"
,
"
}
"
,
],
"description"
:
"
Class with ::Range pattern
"
,
},
"Class::Range delegate"
: {
"scope"
:
"
ql
"
,
"prefix"
:
"
range delegate
"
,
"body"
: [
"
${1:DataFlow::Node} ${2:getThing}() { result = range.$2() }
"
],
"description"
:
"
Predicate that delegates to range class
"
,
},
"Type tracking predicate"
: {
"scope"
:
"
ql
"
,
"prefix"
:
"
type tracking
"
,
"body"
: [
"
/** Gets a reference to ${3:a thing}. */
"
,
"
private DataFlow::TypeTrackingNode ${1:myType}(DataFlow::TypeTracker t) {
"
,
"
t.start() and
"
,
"
result = ${2:value}
"
,
"
or
"
,
"
exists(DataFlow::TypeTracker t2 |
"
,
"
result = $1(t2).track(t2, t)
"
,
"
)
"
,
"
}
"
,
"
"
,
"
/** Gets a reference to $3. */
"
,
"
DataFlow::Node $1() {
"
,
"
$1(DataFlow::TypeTracker::end()).flowsTo(result)
"
,
"
}
"
],
"description"
:
"
Type tracking predicate
"
,
},
"Taint tracking configuration"
: {
"scope"
:
"
ql
"
,
"prefix"
:
"
taint tracking
"
,
"body"
: [
"
/** @kind path-problem */
"
,
"
import python
"
,
"
import experimental.dataflow.DataFlow
"
,
"
import experimental.dataflow.TaintTracking
"
,
"
import experimental.semmle.python.Concepts
"
,
"
import experimental.dataflow.RemoteFlowSources
"
,
"
import DataFlow::PathGraph
"
,
"
class ${1:Config} extends TaintTracking::Configuration {
"
,
"
$1() { this =
\"
$1
\"
}
"
,
"
"
,
"
override predicate isSource(DataFlow::Node node) {
"
,
"
${2:none()}
"
,
"
}
"
,
"
"
,
"
override predicate isSink(DataFlow::Node node) {
"
,
"
${3:none()}
"
,
"
}
"
,
"
}
"
,
"
"
,
"
from $1 cfg, DataFlow::PathNode source, DataFlow::PathNode sink
"
,
"
where cfg.hasFlowPath(source, sink)
"
,
"
select sink, source, sink,
\"
taint from $@
\"
, source.getNode(),
\"
here
\"
"
]
},
"Type tracking class"
: {
"scope"
:
"
ql
"
,
"prefix"
:
"
type tracking class
"
,
"body"
: [
"
/**
"
,
"
* Provides models for the `${TM_SELECTED_TEXT}` class
"
,
"
*
"
,
"
* See ${1:https://apiref (TODO)}.
"
,
"
*/
"
,
"
module ${TM_SELECTED_TEXT/^(.*)
\\
.([^.]+)$/$2/} {
"
,
"
/** Gets a reference to the `${TM_SELECTED_TEXT}` class. */
"
,
"
private API::Node classRef() {
"
,
"
result = API::moduleImport(
\"
${TM_SELECTED_TEXT/
\\
.([^.]+)/
\"
).getMember(
\"
$1/g}
\"
)
"
,
"
}
"
,
"
"
,
"
/**
"
,
"
* A source of instances of `${TM_SELECTED_TEXT}`, extend this class to model new instances.
"
,
"
*
"
,
"
* This can include instantiations of the class, return values from function
"
,
"
* calls, or a special parameter that will be set when functions are called by an external
"
,
"
* library.
"
,
"
*
"
,
"
* Use the predicate `${TM_SELECTED_TEXT/^(.*)
\\
.([^.]+)$/$2/}::instance()` to get references to instances of `${TM_SELECTED_TEXT}`.
"
,
"
*/
"
,
"
abstract class InstanceSource extends DataFlow::LocalSourceNode { }
"
,
"
"
,
"
/** A direct instantiation of `${TM_SELECTED_TEXT}`. */
"
,
"
private class ClassInstantiation extends InstanceSource, DataFlow::CallCfgNode {
"
,
"
ClassInstantiation() { this = classRef().getACall() }
"
,
"
}
"
,
"
"
,
"
/** Gets a reference to an instance of `${TM_SELECTED_TEXT}`. */
"
,
"
private DataFlow::TypeTrackingNode instance(DataFlow::TypeTracker t) {
"
,
"
t.start() and
"
,
"
result instanceof InstanceSource
"
,
"
or
"
,
"
exists(DataFlow::TypeTracker t2 | result = instance(t2).track(t2, t))
"
,
"
}
"
,
"
"
,
"
/** Gets a reference to an instance of `${TM_SELECTED_TEXT}`. */
"
,
"
DataFlow::Node instance() { instance(DataFlow::TypeTracker::end()).flowsTo(result) }
"
,
"
"
,
"
/**
"
,
"
* Taint propagation for `${TM_SELECTED_TEXT}`.
"
,
"
*/
"
,
"
private class InstanceTaintSteps extends InstanceTaintStepsHelper {
"
,
"
InstanceTaintSteps() { this =
\"
${TM_SELECTED_TEXT}
\"
}
"
,
"
"
,
"
override DataFlow::Node getInstance() { result = instance() }
"
,
"
"
,
"
override string getAttributeName() { none() }
"
,
"
"
,
"
override string getMethodName() { none() }
"
,
"
"
,
"
override string getAsyncMethodName() { none() }
"
,
"
}
"
,
"
"
,
"
/**
"
,
"
* Extra taint propagation for `${TM_SELECTED_TEXT}`, not covered by `InstanceTaintSteps`.
"
,
"
*/
"
,
"
private class AdditionalTaintStep extends TaintTracking::AdditionalTaintStep {
"
,
"
override predicate step(DataFlow::Node nodeFrom, DataFlow::Node nodeTo) {
"
,
"
// TODO
"
,
"
none()
"
,
"
}
"
,
"
}
"
,
"
}
"
,
],
"description"
:
"
Type tracking class (select full class path before inserting)
"
,
},
"API graph .getMember chain"
: {
"scope"
:
"
ql
"
,
"prefix"
:
"
api graph .getMember chain
"
,
"body"
: [
"
API::moduleImport(
\"
${TM_SELECTED_TEXT/
\\
.([^.]+)/
\"
).getMember(
\"
$1/g}
\"
)
"
],
"description"
:
"
API graph .getMember chain (select full path before inserting)
"
,
},
"debug partial flow"
: {
"scope"
:
"
ql
"
,
"prefix"
:
"
debug partial flow
"
,
"body"
: [
"
// put the line below inside the configuration
"
,
"
// override int explorationLimit() { result = 5 }
"
,
"
// and then run quick evaluation on the predicate below
"
,
"
// (and potentially limit the set of sources)
"
,
"
predicate debugPartialFlow(Location loc, DataFlow::PartialPathNode node, int dist) {
"
,
"
loc = node.getNode().getLocation() and
"
,
"
exists(loc.getFile().getRelativePath()) and
"
,
"
exists(Configuration config, DataFlow::PartialPathNode source |
"
,
"
config.hasPartialFlow(source, node, dist)
"
,
"
)
"
,
"
}
"
,
],
"description"
:
"
debug partial flow
"
,
},
}
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