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Qbicc run time main entry point
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package org.qbicc.runtime.stackwalk;

import org.qbicc.runtime.AutoQueued;
import org.qbicc.runtime.CNative;
import org.qbicc.runtime.main.CompilerIntrinsics;

import static org.qbicc.runtime.CNative.*;

public final class MethodData {

    public static native String getFileName(int minfoIndex);
    public static native String getMethodName(int minfoIndex);
    public static native String getMethodDesc(int minfoIndex);
    public static native type_id getTypeId(int minfoIndex);
    public static native int getModifiers(int minfoIndex);

    public static String getClassName(int minfoIndex) {
        Class clazz = getClass(minfoIndex);
        return clazz == null ? "" : clazz.getName();
    }

    public static Class getClass(int minfoIndex) {
        type_id typeId = getTypeId(minfoIndex);
        Class clazz = typeId.isZero() ? null : CompilerIntrinsics.getClassFromTypeId(typeId, word(0));
        return clazz;
    }

    public static boolean hasAllModifiersOf(int minfoIndex, int mask) {
        int modifiers = getModifiers(minfoIndex);
        return (modifiers & mask) == mask;
    }

    public static boolean hasNoModifiersOf(int minfoIndex, int mask) {
        int modifiers = getModifiers(minfoIndex);
        return (modifiers & mask) == 0;
    }

    public static native int getMethodInfoIndex(int scIndex);
    public static native int getLineNumber(int scIndex);
    public static native int getBytecodeIndex(int scIndex);
    public static native int getInlinedAtIndex(int scIndex);

    public static native int getSourceCodeInfoIndex(int index);
    public static native long getInstructionAddress(int index);
    public static native int getInstructionListSize();

    static int findInstructionIndex(long ip) {
        // do a binary search in instruction table
        int upper = MethodData.getInstructionListSize();
        int lower = 0;
        while (upper >= lower) {
            int mid = ( upper + lower ) >>> 1;
            long addr = MethodData.getInstructionAddress(mid);
            if (ip == addr) {
                return mid;
            } else if (ip > addr) {
                lower = mid+1;
            } else {
                upper = mid-1;
            }
        }
        return -1;
    }

    // Debug method to validate linker order was as expected.
    static void validateMethodData() {
        int upper = MethodData.getInstructionListSize();
        long prev = 0;
        printString("Starting validation");
        printString(Integer.toString(upper));
        for (int i=0; i clazz = getClass(mi);
            Module module = clazz.getModule();
            String modName = module == null ? null : module.getName();
            String modVer = /* todo: access directly via module */ null;
            ClassLoader classLoader = clazz.getClassLoader();
            String classLoaderName = classLoader == null ? null : classLoader.getName();
            steArray[i] = new StackTraceElement(classLoaderName, modName, modVer, clazz.getName(), getMethodName(mi), getFileName(mi), getLineNumber(sc));
            ((StackTraceElementAccess)(Object)steArray[i]).declaringClassObject = clazz;
        }
    }
}