[antlr-interest] C runtime issue

[Andy Grove]

Hi,

When I invoke my generated C parser, I see memory usage climb from 770MB to
4GB in a few seconds and the parser never returns. My init code is as
follows:

    input = antlr3NewAsciiStringInPlaceStream((pANTLR3_UINT8)stringCopy,
stringLength, NULL);
    if (input == NULL) {
        log->error("input error");
        return;
    }

    lexer = DbsMySQL_CPPLexerNew(input);
    if (lexer == NULL) {
        log->error("lexer error");
        return;
    }

    tstream = antlr3CommonTokenStreamSourceNew(ANTLR3_SIZE_HINT,
lexer->pLexer->rec->state->tokSource);
    if (tstream == NULL) {
        log->error("token stream error");
        return;
    }

    parser = DbsMySQL_CPPParserNew(tstream);
     if (parser == NULL) {
        log->error("parser error");
         return;
     }

     parser->statement(parser);

I added some printf() statements to the generated code and tracked the issue
down to the "LA(1)" macro which expands to
"ctx->pParser->tstream->istream->_LA(ctx->pParser->tstream->istream, 1)". It
seems that this call never completes. Here is the code in question:

statement(pDbsMySQL_CPPParser ctx)
{
    printf("statement()\n");
    /* Initialize rule variables
     */
     /* Empty */
    {
        {
            //  DbsMySQL_CPP.g:74:1: (i= insertStatement EOF | s=
selectStatement[true] EOF | u= updateStatement EOF | d= deleteStatement EOF
)
            printf("** 1\n");

            ANTLR3_UINT32 alt1;
            alt1=4;

            printf("** 2\n");

            switch ( LA(1) )  // this call never completes
            {
            case INSERT:

I'd appreciate any pointers on fixing this or at least debugging it further.

Thanks!

Andy.
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