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* dwarf2loc.c (read_pieced_value): Exit loop when result is full.
	<DWARF_VALUE_OPTIMIZED_OUT>: New case.
	* dwarf2expr.h (enum dwarf_value_location)
	<DWARF_VALUE_OPTIMIZED_OUT>: New constant.
	* dwarf2expr.c (dwarf_expr_stack_empty_p): New function.
	(add_piece): Handle empty piece.
	(execute_stack_op) <DW_OP_piece>: Handle
	DWARF_VALUE_OPTIMIZED_OUT.
gdb/testsuite
	* gdb.dwarf2/pieces.exp (pieces_test_f6): New proc.
	Call it.
	* gdb.dwarf2/pieces.c (struct C): New.
	(f6): New function.
	* gdb.dwarf2/pieces.S: Replace.
This commit is contained in:
Tom Tromey
2010-05-21 21:01:46 +00:00
parent 74de6778b1
commit cb82636715
8 changed files with 539 additions and 207 deletions
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20
gdb/dwarf2expr.c
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@ -143,6 +143,14 @@ dwarf_expr_fetch_in_stack_memory (struct dwarf_expr_context *ctx, int n)
}
/* Return true if the expression stack is empty. */
static int
dwarf_expr_stack_empty_p (struct dwarf_expr_context *ctx)
{
return ctx->stack_len == 0;
}
/* Add a new piece to CTX's piece list. */
static void
add_piece (struct dwarf_expr_context *ctx, ULONGEST size)
@ -167,6 +175,15 @@ add_piece (struct dwarf_expr_context *ctx, ULONGEST size)
p->v.literal.data = ctx->data;
p->v.literal.length = ctx->len;
}
else if (dwarf_expr_stack_empty_p (ctx))
{
p->location = DWARF_VALUE_OPTIMIZED_OUT;
/* Also reset the context's location, for our callers. This is
a somewhat strange approach, but this lets us avoid setting
the location to DWARF_VALUE_MEMORY in all the individual
cases in the evaluator. */
ctx->location = DWARF_VALUE_OPTIMIZED_OUT;
}
else
{
p->v.expr.value = dwarf_expr_fetch (ctx, 0);
@ -859,7 +876,8 @@ execute_stack_op (struct dwarf_expr_context *ctx,
/* Pop off the address/regnum, and reset the location
type. */
if (ctx->location != DWARF_VALUE_LITERAL)
if (ctx->location != DWARF_VALUE_LITERAL
&& ctx->location != DWARF_VALUE_OPTIMIZED_OUT)
dwarf_expr_pop (ctx);
ctx->location = DWARF_VALUE_MEMORY;
}