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#include <jni.h>
#include <jvmti.h>
#include <stdio.h>
#include <stdlib.h>
#include "getlocalvartable.h"
JNIEXPORT jint JNICALL Java_getlocalvartable_do_1getlocalvartable_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 entrys;
jvmtiLocalVariableEntry *var_table;
jvmtiError jerr;
jmethodID meth_ids[3];
meth_ids[0] = env->GetMethodID (klass, "aMethod", "(FF)D");
meth_ids[1] = env->GetMethodID (klass, "bMethod", "(II)J");
meth_ids[2] = env->GetMethodID (klass, "cMethod",
"(Ljava/lang/Object;)Ljava/lang/Object;");
for (int i = 0; i < 3; i++)
{
jerr = jvmti->GetLocalVariableTable (meth_ids[i], &entrys, &var_table);
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
{
for (int j = 0; j < entrys; j++)
{
printf ("Slot: %d\n", static_cast<int> (var_table[j].slot));
printf (" Name: %s\n", var_table[j].name);
jvmti->Deallocate (reinterpret_cast<unsigned char *> (var_table[j].name));
printf (" Sig: %s\n", var_table[j].signature);
jvmti->Deallocate (reinterpret_cast<unsigned char *> (var_table[j].signature));
printf (" Gen Sig: %s\n", var_table[j].generic_signature);
jvmti->Deallocate (reinterpret_cast<unsigned char *> (var_table[j].generic_signature));
printf (" Start Loc: %ld\n", static_cast<long> (var_table[j].start_location));
printf (" Length: %d\n", static_cast<int> (var_table[j].length));
}
jvmti->Deallocate (reinterpret_cast<unsigned char *> (var_table));
}
}
return 0;
}
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