PR debug/112656 - btf: function prototypes generated with name
With this patch, all BTF_KIND_FUNC_PROTO will appear anonymous in the
generated BTF section.
As noted in the discussion in the bugzilla, the number of
BTF_KIND_FUNC_PROTO types output varies across targets (BPF with -mco-re
vs non-BPF targets). Hence the check in the test case merely checks
that all BTF_KIND_FUNC_PROTO appear anonymous.
gcc/ChangeLog:
PR debug/112656
* btfout.cc (btf_asm_type): Fixup ctti_name for all
BTF types of kind BTF_KIND_FUNC_PROTO.
gcc/testsuite/ChangeLog:
PR debug/112656
* gcc.dg/debug/btf/btf-function-7.c: New test.
Testing notes:
- bootstrapped and reg tested on x86_64
- No regressions in btf.exp on BPF target
---
gcc/btfout.cc | 4 ++++
.../gcc.dg/debug/btf/btf-function-7.c | 19 +++++++++++++++++++
2 files changed, 23 insertions(+)
create mode 100644 gcc/testsuite/gcc.dg/debug/btf/btf-function-7.c
diff --git a/gcc/btfout.cc b/gcc/btfout.cc
index 1c25404b2c0..a5e0d640e19 100644
--- a/gcc/btfout.cc
+++ b/gcc/btfout.cc
@@ -820,6 +820,10 @@ btf_asm_type (ctf_container_ref ctfc, ctf_dtdef_ref dtd)
btf_kind = BTF_KIND_ENUM64;
}
+ /* PR debug/112656. BTF_KIND_FUNC_PROTO is always anonymous. */
+ if (btf_kind == BTF_KIND_FUNC_PROTO)
+ dtd->dtd_data.ctti_name = 0;
+
dw2_asm_output_data (4, dtd->dtd_data.ctti_name,
"TYPE %" PRIu64 " BTF_KIND_%s '%s'",
get_btf_id (dtd->dtd_type), btf_kind_name (btf_kind),
diff --git a/gcc/testsuite/gcc.dg/debug/btf/btf-function-7.c
b/gcc/testsuite/gcc.dg/debug/btf/btf-function-7.c
new file mode 100644
index 00000000000..b560dc75650
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/debug/btf/btf-function-7.c
@@ -0,0 +1,19 @@
+/* Test BTF for inlined functions.
+
+ See PR/112656 - btf: function prototypes generated with name
+ BTF_KIND_FUNC_PROTO must be anonymous. */
+
+/* { dg-do compile } */
+/* { dg-options "-O2 -gbtf -dA" } */
+
+/* { dg-final { scan-assembler-times "BTF_KIND_FUNC_PROTO
''\\(\[0-9a-z\]*\\)'" 0 } } */
+
+static int log_event(const char *event_name, void *dev_ptr)
+{
+ return 666;
+}
+
+int foo ()
+{
+ return log_event ("foobar", ((void *)0));
+}
--
2.41.0
