[PATCH v5 08/19] gendwarfksyms: Expand array_type
STALE684d
REVIEWED: 2 (2M)
From: Sami Tolvanen <samitolvanen@google.com>
Date: 2024-10-30 17:01:37
Also in:
asahi, linux-kbuild, lkml, rust-for-linux
Subsystem:
gendwarfksyms, the rest · Maintainers:
Sami Tolvanen, Linus Torvalds
Revision v5 of 7 in this series; 2 review trailers.
Revisions (7)
Add support for expanding DW_TAG_array_type, and the subrange type
indicating array size.
Example source code:
const char *s[34];
Output with --dump-dies:
variable array_type[34] {
pointer_type {
const_type {
base_type char byte_size(1) encoding(6)
}
} byte_size(8)
}
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Acked-by: Neal Gompa <neal@gompa.dev>
Reviewed-by: Petr Pavlu <petr.pavlu@suse.com>
---
scripts/gendwarfksyms/dwarf.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/scripts/gendwarfksyms/dwarf.c b/scripts/gendwarfksyms/dwarf.c
index 7e6b477d7c12..ade9b3b7b119 100644
--- a/scripts/gendwarfksyms/dwarf.c
+++ b/scripts/gendwarfksyms/dwarf.c@@ -219,6 +219,7 @@ DEFINE_PROCESS_UDATA_ATTRIBUTE(encoding) } DEFINE_MATCH(formal_parameter) +DEFINE_MATCH(subrange) bool match_all(Dwarf_Die *die) {
@@ -341,6 +342,33 @@ DEFINE_PROCESS_TYPE(shared) DEFINE_PROCESS_TYPE(volatile) DEFINE_PROCESS_TYPE(typedef) +static void process_subrange_type(struct state *state, struct die *cache, + Dwarf_Die *die) +{ + Dwarf_Word count = 0; + + if (get_udata_attr(die, DW_AT_count, &count)) + process_fmt(cache, "[%" PRIu64 "]", count); + else if (get_udata_attr(die, DW_AT_upper_bound, &count)) + process_fmt(cache, "[%" PRIu64 "]", count + 1); + else + process(cache, "[]"); +} + +static void process_array_type(struct state *state, struct die *cache, + Dwarf_Die *die) +{ + process(cache, "array_type"); + /* Array size */ + check(process_die_container(state, cache, die, process_type, + match_subrange_type)); + process(cache, " {"); + process_linebreak(cache, 1); + process_type_attr(state, cache, die); + process_linebreak(cache, -1); + process(cache, "}"); +} + static void __process_subroutine_type(struct state *state, struct die *cache, Dwarf_Die *die, const char *type) {
@@ -436,7 +464,9 @@ static int process_type(struct state *state, struct die *parent, Dwarf_Die *die) PROCESS_TYPE(volatile) /* Subtypes */ PROCESS_TYPE(formal_parameter) + PROCESS_TYPE(subrange) /* Other types */ + PROCESS_TYPE(array) PROCESS_TYPE(base) PROCESS_TYPE(subroutine) PROCESS_TYPE(typedef)
--
2.47.0.163.g1226f6d8fa-goog