Re: [Anjuta-list] Debug crash

[Michele Bendazzoli <mickymouse mickymouse it>]

Even more strange: if I put

struct _MMStm *stm;

all works as expected ...

But this should be exactly the same as

MMStm stm;

Because MMStm is a pointer to struct _MMStm. In fact there is the

typedef struct _MMStm *MMStm;

definition ...

This sound very strange to me ...

ciao, Michele

Michele Bendazzoli ha scritto:
> I'm using ubuntu Dapper Drake 6.06 on a AMD64 K8 and Anjuta 1.2.4a.
>
> in pdg.h i have this definition:
>
> ...
> typedef enum {
>    START_NODE,
>    STOP_NODE,
>    ASSIGNMENT_NODE,
>    BRANCH_NODE,
>    JUMP_NODE
> } MMStmKind;
>
> typedef struct _MMStm *MMStm;

> struct _MMStm{      MMStmKind kind;
>    gint n_istr;
>    union {
>      gchar seq;
>      struct {
>          MMStm true_stm;
>          MMStm false_stm;        } branch;
>      MMStm goto_stm;
>    } stm;
>    GList *next;
> };
> ...
>
> and in pdg.c there are two functions:
>
> ...
> MMCfg parse_istruction(MMCfg cfg, gchar *istr){
>    MMStm stm;
>      if (cfg == NULL)
>        cfg = MMCfg_alloc();
>
>    return cfg;
> };
>      
> MMCfg parse_program(gchar *istr_list) {
>
>    gchar **istr, *s;
>    gint i;
>      istr = g_strsplit(istr_list,".",MAX_ISTR_SIZE);
>      for(i = 0;(s = *(istr + i)) && (i<=MAX_ISTR_SIZE); i++){
>        Cfg = parse_istruction(Cfg, s);
>    };
>      return Cfg;
>
> };
> ....
>
> What happens is that when the control reach the call to 
> parse_istruction procedure in parse_program, if I press the F6 key the 
> function return me a MMCfg object as expected, but if i press a step 
> into procedure (F5) button the program crash. Moreover, if I remove 
> the "MMStm stm;" declaration from the parse_istruction procedure, I'm 
> able to step into the procedure ...
>
> Now, is this my fault or is a bug of debugger? I'm trying to 
> experiment with some definition and I'm not able to see why the 
> utilize of this definition should cause some troubles.
>
> Thank you in advance for any advice.
>
> Michele
>
>
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