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Re: [cdt-dev] Infinite loop problem
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Could you file a bug report so we don't lose track of this issue? Thanks!
It would be especially helpful if you can attach a self-contained code example that reproduces the problem.
Regards,
Nate
________________________________
> Date: Wed, 25 Nov 2015 13:49:38 -0200
> From: arescarv@xxxxxxxxx
> To: cdt-dev@xxxxxxxxxxx
> Subject: Re: [cdt-dev] Infinite loop problem
>
> Example of code from zend_API.c, line 3606:
> property_info = pemalloc(sizeof(zend_property_info), 1); // <- This
> line causes a infinite loop!
>
> #define pemalloc(size, persistent)
> ((persistent)?__zend_malloc(size):emalloc(size))
>
> # define ZEND_ALLOCATOR(size) \
> ZEND_MM_BINS_INFO(_ZEND_BIN_ALLOCATOR_SELECTOR_START, size, y) \
> ((size <= ZEND_MM_MAX_LARGE_SIZE) ? _emalloc_large(size) :
> _emalloc_huge(size)) \
> ZEND_MM_BINS_INFO(_ZEND_BIN_ALLOCATOR_SELECTOR_END, size, y)
>
> # define _emalloc(size) \
> (__builtin_constant_p(size) ? \
> ZEND_ALLOCATOR(size) \
> : \
> _emalloc(size) \
> )
>
> /* num, size, count, pages */
> #define ZEND_MM_BINS_INFO(_, x, y) \
> _( 0, 8, 512, 1, x, y) \
> _( 1, 16, 256, 1, x, y) \
> _( 2, 24, 170, 1, x, y) \
> _( 3, 32, 128, 1, x, y) \
> _( 4, 40, 102, 1, x, y) \
> _( 5, 48, 85, 1, x, y) \
> _( 6, 56, 73, 1, x, y) \
> _( 7, 64, 64, 1, x, y) \
> _( 8, 80, 51, 1, x, y) \
> _( 9, 96, 42, 1, x, y) \
> _(10, 112, 36, 1, x, y) \
> _(11, 128, 32, 1, x, y) \
> _(12, 160, 25, 1, x, y) \
> _(13, 192, 21, 1, x, y) \
> _(14, 224, 18, 1, x, y) \
> _(15, 256, 16, 1, x, y) \
> _(16, 320, 64, 5, x, y) \
> _(17, 384, 32, 3, x, y) \
> _(18, 448, 9, 1, x, y) \
> _(19, 512, 8, 1, x, y) \
> _(20, 640, 32, 5, x, y) \
> _(21, 768, 16, 3, x, y) \
> _(22, 896, 9, 2, x, y) \
> _(23, 1024, 8, 2, x, y) \
> _(24, 1280, 16, 5, x, y) \
> _(25, 1536, 8, 3, x, y) \
> _(26, 1792, 16, 7, x, y) \
> _(27, 2048, 8, 4, x, y) \
> _(28, 2560, 8, 5, x, y) \
> _(29, 3072, 4, 3, x, y)
> ....
>
> 2015-11-25 13:38 GMT-02:00 Alisson Linhares
> <arescarv@xxxxxxxxx<mailto:arescarv@xxxxxxxxx>>:
> Hi guys, I am having a strange behavior with CDT. The method
> getExpressionType, in CASTUnaryExpression.java, is entering into an
> infinite loop for some complex expressions.
>
> To see this behavior, you can use PHP project, more precisely this
> file: https://github.com/php/php-src/blob/master/Zend/zend_API.c#L3606
> and put this line inside the getExpressionType method:
> System.out.println( this.getRawSignature() );
>
> This is my visitor:
> public class DemoVisitor extends ASTVisitor {
> public Demo() {
> shouldVisitExpressions = true;
> }
>
> public int visit( IASTExpression expression ) {
> System.out.println( expression.getExpressionType() ); //
> Prints the type of an expression
> return PROCESS_CONTINUE;
> }
> }
>
> ps.: I think this problem may be related to C/C++ macro expansions,
> because it only happens when we try to parse complex macro
> "expressions". Has anyone ever had a similar problem?
>
>
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