vla: enable sizeof operator to work with variable length arrays
In C99 the sizeof operator computes the size of a variable length array at runtime (6.5.3.4 The sizeof operator). This patch reflects the semantic change in the debugger. We now are able to get the size of a vla: 1| void foo (size_t n) { 2| int vla[n]; 3| } (gdb) p sizeof(vla) yields N * sizeof(int). gdb/ChangeLog: * eval.c (evaluate_subexp_for_sizeof) <OP_VAR_VALUE>: If the type passed to sizeof is dynamic evaluate the argument to compute the length.
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@ -1,3 +1,8 @@
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2014-04-14 Sanimir Agovic <sanimir.agovic@intel.com>
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* eval.c (evaluate_subexp_for_sizeof) <OP_VAR_VALUE>: If the type
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passed to sizeof is dynamic evaluate the argument to compute the length.
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2014-04-14 Sanimir Agovic <sanimir.agovic@intel.com>
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Joel Brobecker <brobecker@adacore.com>
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@ -3040,8 +3040,14 @@ evaluate_subexp_for_sizeof (struct expression *exp, int *pos)
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break;
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case OP_VAR_VALUE:
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(*pos) += 4;
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type = SYMBOL_TYPE (exp->elts[pc + 2].symbol);
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if (is_dynamic_type (type))
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{
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val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_NORMAL);
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type = value_type (val);
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}
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else
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(*pos) += 4;
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break;
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default:
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