From 1d6edc3c37dc30e5fe46f25fa4d4974c78b60e5b Mon Sep 17 00:00:00 2001 From: Jan Kratochvil Date: Wed, 12 Oct 2011 22:04:12 +0000 Subject: gdb/ Fix empty DWARF expressions DATA vs. SIZE conditionals. * dwarf2loc.c (dwarf2_find_location_expression): Clear *LOCEXPR_LENGTH. (dwarf_expr_frame_base_1): Indicate unavailability via zero *LENGTH. (locexpr_tracepoint_var_ref): Check only zero SIZE, not zero DATA. (loclist_read_variable, loclist_tracepoint_var_ref): Do not check for zero DATA. * dwarf2loc.h (struct dwarf2_locexpr_baton): Comment DATA vs. SIZE validity. * dwarf2read.c (struct dwarf_block): Comment DATA validity. (dwarf2_fetch_die_location_block, dwarf2_symbol_mark_computed): Do not clear DATA on zero SIZE. gdb/testsuite/ Fix empty DWARF expressions DATA vs. SIZE conditionals. * gdb.dwarf2/dw2-op-call.S (arraycallnoloc, arraynoloc): New DIEs. (loclist): New. (4): New abbrev. * gdb.dwarf2/dw2-op-call.exp: Remove variable srcfile and executable. Use prepare_for_testing, remove clean_restart. (p arraynoloc, p arraycallnoloc): New tests. --- gdb/dwarf2loc.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'gdb/dwarf2loc.h') diff --git a/gdb/dwarf2loc.h b/gdb/dwarf2loc.h index 32aa0af..8196791 100644 --- a/gdb/dwarf2loc.h +++ b/gdb/dwarf2loc.h @@ -87,10 +87,12 @@ struct value *dwarf2_evaluate_loc_desc (struct type *type, struct dwarf2_locexpr_baton { - /* Pointer to the start of the location expression. */ + /* Pointer to the start of the location expression. Valid only if SIZE is + not zero. */ const gdb_byte *data; - /* Length of the location expression. */ + /* Length of the location expression. For optimized out expressions it is + zero. */ unsigned long size; /* The compilation unit containing the symbol whose location -- cgit v1.1