+#include <jni.h>
+
+#include <jvmti.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "getargssize.h"
+
+JNIEXPORT jint JNICALL Java_getargssize_do_1getargssize_1tests
+(JNIEnv *env, jclass klass)
+{
+ JavaVM *vm;
+ jint err = env->GetJavaVM (&vm);
+ if (err < 0)
+ {
+ fprintf (stderr, "error getting VM\n");
+ exit (1);
+ }
+
+ jvmtiEnv *jvmti = NULL;
+ vm->GetEnv ((void **) &jvmti, JVMTI_VERSION_1_0);
+
+ if (jvmti == NULL)
+ {
+ fprintf (stderr, "error getting jvmti environment\n");
+ exit (1);
+ }
+
+ jint args_size;
+
+ jvmtiError jerr;
+
+ jmethodID meth_ids[4];
+
+ meth_ids[0] = env->GetMethodID (klass, "aMethod", "(FI)I");
+ meth_ids[1] = env->GetMethodID (klass, "bMethod", "(JDI)J");
+ meth_ids[2] = env->GetStaticMethodID (klass, "cMethod", "()Z");
+ meth_ids[3] = env->GetStaticMethodID (klass, "dMethod",
+ "(Ljava/lang/Object;)Ljava/lang/Object;");
+ for (int i = 0; i < 4; i++)
+ {
+ jerr = jvmti->GetArgumentsSize (meth_ids[i], &args_size);
+ if (jerr != JVMTI_ERROR_NONE)
+ {
+ char *error_name;
+ jvmti->GetErrorName (jerr, &error_name);
+ fprintf (stderr, "JVMTI Error: %s\n", error_name);
+ jvmti->Deallocate (reinterpret_cast<unsigned char *> (error_name));
+ }
+ else
+ {
+ printf ("Method %d requires %d slots for its arguments\n", i,
+ args_size);
+ }
+ }
+
+ return 0;
+}