diff options
| author | Sanimir Agovic <sanimir.agovic@intel.com> | 2013-10-09 15:28:22 +0100 |
|---|---|---|
| committer | Joel Brobecker <brobecker@adacore.com> | 2014-04-14 09:11:48 -0700 |
| commit | 4ad88275f81a586e32e86351cc415a97d58ef448 (patch) | |
| tree | 0dfd1e5cb7622596da1bee79b7148cedcff66fe6 /gdb/eval.c | |
| parent | 80180f796d366d230822c07a15aa68971abf9d77 (diff) | |
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.
Diffstat (limited to 'gdb/eval.c')
| -rw-r--r-- | gdb/eval.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gdb/eval.c b/gdb/eval.c index c1e47e0368..85523cd2fd 100644 --- a/gdb/eval.c +++ b/gdb/eval.c @@ -3040,8 +3040,14 @@ evaluate_subexp_for_sizeof (struct expression *exp, int *pos) break; case OP_VAR_VALUE: - (*pos) += 4; type = SYMBOL_TYPE (exp->elts[pc + 2].symbol); + if (is_dynamic_type (type)) + { + val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_NORMAL); + type = value_type (val); + } + else + (*pos) += 4; break; default: |