Variable Debug View Errors

[Toe]

I have a structure with a few layers and it seems that the debugger has a difficult time showing the memory at specific structure members.  Is it a problem with viewing unions?  Any thoughts?

The error that runs off the screen is "Type struct{...} has no component named floats.  Unable to create variable object".

It can obviously parse it at some level since you can see all of the data in the "details" below.

[BlackNight]

Hi Ryan,

would it be possible to post that data structure typedef so I can try to reproduce it?

Thanks,

Erich

[Toe]

No problem:

#pragma options align=packed

typedef struct {

    union {

        float floats[38];

        uint32 longs[38];

        uint16 words[76];

        uint8 bytes[152];

    } calData;

    union {

        float floats[38];

        uint32 longs[38];

        uint16 words[76];

        uint8 bytes[152];

    } usrData;

    union {

        float floats[35];

        uint32 longs[35];

        uint16 words[70];

        uint8 bytes[140];

    } netData;

    float version;

    uint8 state;

    uint8 dataType;

    uint8 hasUsrData;  // both user and net data were downloaded

    uint8 pad[3];

    uint16 crc;

} TRG_DATA_TYPE;

#pragma options align=reset

And the data types are pretty standard:

typedef unsigned char           uint8;

typedef unsigned short int      uint16;

typedef unsigned long int       uint32;

[BlackNight]

thanks for sharing. I confirm that I'm able to reproduce the problem. I see what I can find out.

[BlackNight · Accepted solution]

Did some digging, and this seems to be a generic GDB problem. I see it in other GDB IDE's too.

typedef struct {

  union {

    int i[16];

    char c[32];

  } a;

} U;

It fails for for named unions (name 'a' above) with arrays in it. it works if I use anyonmous unions like this:

typedef struct {

  union {

    int i[16];

    char c[32];

  };

} U;

I don't know if that workaround will help you. It would be to use anonymouse unions like this:

typedef struct {

    union {

        float calDatafloats[38];

        uint32 calDatalongs[38];

        uint16 calDatawords[76];

        uint8 calDatabytes[152];

    } ;

    union {

        float usrDatafloats[38];

        uint32 usrDatalongs[38];

        uint16 usrDatawords[76];

        uint8 usrDatabytes[152];

    } ;

    union {

        float netDatafloats[35];

        uint32 netDatalongs[35];

        uint16 netDatawords[70];

        uint8 netDatabytes[140];

    } ;

    float version;

    uint8 state;

    uint8 dataType;

    uint8 hasUsrData;  // both user and net data were downloaded

    uint8 pad[3];

    uint16 crc;

} TRG_DATA_TYPE;

Erich

[Toe]

I have no problem with that suggestion.  Thanks for looking into it!