示例#1
0
entry loadEntry() {
    entry e = { NULL, -1, 0 };
    uint32_t length, offset[4];

    /* reset error container */
    errors.level = 0;

    offset[0] = CURR_OFFSET;
    if (!loadType(&e)) {
        return e;
    }

    offset[1] = CURR_OFFSET;
    if (e.type == REDIS_SELECTDB) {
        if ((length = loadLength(NULL)) == REDIS_RDB_LENERR) {
            SHIFT_ERROR(offset[1], 
                "Error reading database number");
            return e;
        }
        if (length > 63) {
            SHIFT_ERROR(offset[1], 
                "Database number out of range (%d)", length);
            return e;
        }
    } else if (e.type == REDIS_EOF) {
        if (positions[level].offset < positions[level].size) {
            SHIFT_ERROR(offset[0], 
                "Unexpected EOF");
        } else {
            e.success = 1;
        }
        return e;
    } else {
        /* optionally consume expire */
        if (e.type == REDIS_EXPIRETIME) {
            if (!processTime()) return e;
            if (!loadType(&e)) return e;
            db_stats.total_expires++;
        }

        offset[1] = CURR_OFFSET;
        if (!loadPair(&e)) {
            SHIFT_ERROR(offset[1], "Error for type %s", types[e.type]);
            return e;
        }
    }

    /* all entries are followed by a valid type:
     * e.g. a new entry, SELECTDB, EXPIRE, EOF */
    offset[2] = CURR_OFFSET;
    if (peekType() == -1) {
        SHIFT_ERROR(offset[2], "Followed by invalid type");
        SHIFT_ERROR(offset[0], "Error for type %s", types[e.type]);
        e.success = 0;
    } else {
        e.success = 1;
    }

    return e;
}
示例#2
0
/*
 * Generate array load
 */
static void genArrayGet(CompilationUnit *cUnit, MIR *mir, OpSize size,
                        RegLocation rlArray, RegLocation rlIndex,
                        RegLocation rlDest, int scale)
{
    RegisterClass regClass = dvmCompilerRegClassBySize(size);
    int lenOffset = OFFSETOF_MEMBER(ArrayObject, length);
    int dataOffset = OFFSETOF_MEMBER(ArrayObject, contents);
    RegLocation rlResult;
    rlArray = loadValue(cUnit, rlArray, kCoreReg);
    rlIndex = loadValue(cUnit, rlIndex, kCoreReg);
    int regPtr;

    /* null object? */
    ArmLIR * pcrLabel = NULL;

    if (!(mir->OptimizationFlags & MIR_IGNORE_NULL_CHECK)) {
        pcrLabel = genNullCheck(cUnit, rlArray.sRegLow,
                                rlArray.lowReg, mir->offset, NULL);
    }

    regPtr = dvmCompilerAllocTemp(cUnit);

    if (!(mir->OptimizationFlags & MIR_IGNORE_RANGE_CHECK)) {
        int regLen = dvmCompilerAllocTemp(cUnit);
        /* Get len */
        loadWordDisp(cUnit, rlArray.lowReg, lenOffset, regLen);
        /* regPtr -> array data */
        opRegRegImm(cUnit, kOpAdd, regPtr, rlArray.lowReg, dataOffset);
        genBoundsCheck(cUnit, rlIndex.lowReg, regLen, mir->offset,
                       pcrLabel);
        dvmCompilerFreeTemp(cUnit, regLen);
    } else {
        /* regPtr -> array data */
        opRegRegImm(cUnit, kOpAdd, regPtr, rlArray.lowReg, dataOffset);
    }
    if ((size == kLong) || (size == kDouble)) {
        if (scale) {
            int rNewIndex = dvmCompilerAllocTemp(cUnit);
            opRegRegImm(cUnit, kOpLsl, rNewIndex, rlIndex.lowReg, scale);
            opRegReg(cUnit, kOpAdd, regPtr, rNewIndex);
            dvmCompilerFreeTemp(cUnit, rNewIndex);
        } else {
            opRegReg(cUnit, kOpAdd, regPtr, rlIndex.lowReg);
        }
        rlResult = dvmCompilerEvalLoc(cUnit, rlDest, regClass, true);

        HEAP_ACCESS_SHADOW(true);
        loadPair(cUnit, regPtr, rlResult.lowReg, rlResult.highReg);
        HEAP_ACCESS_SHADOW(false);

        dvmCompilerFreeTemp(cUnit, regPtr);
        storeValueWide(cUnit, rlDest, rlResult);
    } else {
        rlResult = dvmCompilerEvalLoc(cUnit, rlDest, regClass, true);

        HEAP_ACCESS_SHADOW(true);
        loadBaseIndexed(cUnit, regPtr, rlIndex.lowReg, rlResult.lowReg,
                        scale, size);
        HEAP_ACCESS_SHADOW(false);

        dvmCompilerFreeTemp(cUnit, regPtr);
        storeValue(cUnit, rlDest, rlResult);
    }
}