Debugger: Support coroutineContext for suspend functions without suspend calls (KT-24829)

idea/jvm-debugger/jvm-debugger-evaluation/src/org/jetbrains/kotlin/idea/debugger/evaluate/KotlinEvaluatorBuilder.kt

@@ -333,7 +333,9 @@ class KotlinEvaluator(val codeFragment: KtCodeFragment, val sourcePosition: Sour
                     return method.name().endsWith("\$default") && DEFAULT_METHOD_MARKERS.any { desc.contains("I${it.descriptor})") }
                 }
 
-                if (parameter in compiledData.crossingBounds) {
+                if (parameter.kind == CodeFragmentParameter.Kind.COROUTINE_CONTEXT) {
+                    evaluationException("'coroutineContext' is not available")
+                } else if (parameter in compiledData.crossingBounds) {
                     evaluationException("'$name' is not captured")
                 } else if (parameter.kind == CodeFragmentParameter.Kind.FIELD_VAR) {
                     evaluationException("Cannot find the backing field '${parameter.name}'")

idea/jvm-debugger/jvm-debugger-evaluation/src/org/jetbrains/kotlin/idea/debugger/evaluate/variables/VariableFinder.kt

@@ -14,6 +14,7 @@ import org.jetbrains.kotlin.codegen.AsmUtil
 import org.jetbrains.kotlin.codegen.AsmUtil.getCapturedFieldName
 import org.jetbrains.kotlin.codegen.AsmUtil.getLabeledThisName
 import org.jetbrains.kotlin.codegen.coroutines.CONTINUATION_VARIABLE_NAME
+import org.jetbrains.kotlin.codegen.coroutines.SUSPEND_FUNCTION_CONTINUATION_PARAMETER
 import org.jetbrains.kotlin.codegen.inline.INLINE_FUN_VAR_SUFFIX
 import org.jetbrains.kotlin.codegen.inline.INLINE_TRANSFORMATION_SUFFIX
 import org.jetbrains.kotlin.idea.core.util.mergeAttachments
@@ -370,7 +371,10 @@ class VariableFinder(val context: ExecutionContext) {
             return null
         }
 
-        val continuationVariable = frameProxy.safeVisibleVariableByName(CONTINUATION_VARIABLE_NAME) ?: return null
+        val continuationVariable = frameProxy.safeVisibleVariableByName(CONTINUATION_VARIABLE_NAME)
+            ?: frameProxy.safeVisibleVariableByName(SUSPEND_FUNCTION_CONTINUATION_PARAMETER)
+            ?: return null
+
         val continuation = frameProxy.getValue(continuationVariable) as? ObjectReference ?: return null
         return findCoroutineContextForContinuation(continuation)
     }

idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/frame/coroutineContextWithoutSuspend.kt

@@ -0,0 +1,15 @@
+package coroutineContextWithoutSuspend
+
+import kotlin.coroutines.coroutineContext
+
+suspend fun main() {
+    foo()
+}
+
+private suspend fun foo() {
+    //Breakpoint!
+    val a = 5
+}
+
+// EXPRESSION: coroutineContext
+// RESULT: instance of kotlin.coroutines.EmptyCoroutineContext(id=ID): Lkotlin/coroutines/EmptyCoroutineContext;

idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/frame/coroutineContextWithoutSuspend.out

@@ -0,0 +1,8 @@
+LineBreakpoint created at coroutineContextWithoutSuspend.kt:11
+Run Java
+Connected to the target VM
+coroutineContextWithoutSuspend.kt:11
+Compile bytecode for coroutineContext
+Disconnected from the target VM
+
+Process finished with exit code 0

idea/tests/org/jetbrains/kotlin/idea/debugger/evaluate/KotlinEvaluateExpressionTestGenerated.java

@@ -700,6 +700,11 @@ public class KotlinEvaluateExpressionTestGenerated extends AbstractKotlinEvaluat
                 runTest("idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/frame/coroutineContextLambda.kt");
             }
 
+            @TestMetadata("coroutineContextWithoutSuspend.kt")
+            public void testCoroutineContextWithoutSuspend() throws Exception {
+                runTest("idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/frame/coroutineContextWithoutSuspend.kt");
+            }
+
             @TestMetadata("defaultImplsMangling.kt")
             public void testDefaultImplsMangling() throws Exception {
                 runTest("idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/frame/defaultImplsMangling.kt");