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