https://gcc.gnu.org/g:ccffdcbbe90381eefb84c479aa9b7ff982fde6f1
commit r16-2668-gccffdcbbe90381eefb84c479aa9b7ff982fde6f1
Author: Yury Khrustalev <yury.khrusta...@arm.com>
Date: Tue Jul 22 15:49:37 2025 +0100
testsuite: Add tests for __init_cpu_features_constructor
Add tests that would call __init_cpu_features_resolver() directly
from an ifunc resolver that would in tern call the function under
test __init_cpu_features_constructor() using synthetic parameters
for different sizes of the 2nd argument.
gcc/testsuite/ChangeLog:
* gcc.target/aarch64/ifunc-resolver.in: add core test functions.
* gcc.target/aarch64/ifunc-resolver-0.c: new test.
* gcc.target/aarch64/ifunc-resolver-1.c: ditto.
* gcc.target/aarch64/ifunc-resolver-2.c: ditto.
* gcc.target/aarch64/ifunc-resolver-3.c: ditto.
* gcc.target/aarch64/ifunc-resolver-4.c: as above.
Diff:
---
.../gcc.target/aarch64/ifunc-resolver-0.c | 12 ++++++
.../gcc.target/aarch64/ifunc-resolver-1.c | 13 ++++++
.../gcc.target/aarch64/ifunc-resolver-2.c | 14 +++++++
.../gcc.target/aarch64/ifunc-resolver-3.c | 15 +++++++
.../gcc.target/aarch64/ifunc-resolver-4.c | 16 ++++++++
gcc/testsuite/gcc.target/aarch64/ifunc-resolver.in | 48 ++++++++++++++++++++++
6 files changed, 118 insertions(+)
diff --git a/gcc/testsuite/gcc.target/aarch64/ifunc-resolver-0.c
b/gcc/testsuite/gcc.target/aarch64/ifunc-resolver-0.c
new file mode 100644
index 000000000000..e544b04fa084
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/ifunc-resolver-0.c
@@ -0,0 +1,12 @@
+/* { dg-do run } */
+/* { dg-require-ifunc "" } */
+/* { dg-require-effective-target mmap } */
+/* { dg-options "-Wno-experimental-fmv-target" } */
+
+#include <stdint.h>
+
+typedef struct {
+ uint64_t size;
+} ifunc_arg_t;
+
+#include "ifunc-resolver.in"
diff --git a/gcc/testsuite/gcc.target/aarch64/ifunc-resolver-1.c
b/gcc/testsuite/gcc.target/aarch64/ifunc-resolver-1.c
new file mode 100644
index 000000000000..be70687dd1b9
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/ifunc-resolver-1.c
@@ -0,0 +1,13 @@
+/* { dg-do run } */
+/* { dg-require-ifunc "" } */
+/* { dg-require-effective-target mmap } */
+/* { dg-options "-Wno-experimental-fmv-target" } */
+
+#include <stdint.h>
+
+typedef struct {
+ uint64_t size;
+ uint64_t hwcap;
+} ifunc_arg_t;
+
+#include "ifunc-resolver.in"
diff --git a/gcc/testsuite/gcc.target/aarch64/ifunc-resolver-2.c
b/gcc/testsuite/gcc.target/aarch64/ifunc-resolver-2.c
new file mode 100644
index 000000000000..bf594d05f698
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/ifunc-resolver-2.c
@@ -0,0 +1,14 @@
+/* { dg-do run } */
+/* { dg-require-ifunc "" } */
+/* { dg-require-effective-target mmap } */
+/* { dg-options "-Wno-experimental-fmv-target" } */
+
+#include <stdint.h>
+
+typedef struct {
+ uint64_t size;
+ uint64_t hwcap;
+ uint64_t hwcap2;
+} ifunc_arg_t;
+
+#include "ifunc-resolver.in"
diff --git a/gcc/testsuite/gcc.target/aarch64/ifunc-resolver-3.c
b/gcc/testsuite/gcc.target/aarch64/ifunc-resolver-3.c
new file mode 100644
index 000000000000..f16d01b312d9
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/ifunc-resolver-3.c
@@ -0,0 +1,15 @@
+/* { dg-do run } */
+/* { dg-require-ifunc "" } */
+/* { dg-require-effective-target mmap } */
+/* { dg-options "-Wno-experimental-fmv-target" } */
+
+#include <stdint.h>
+
+typedef struct {
+ uint64_t size;
+ uint64_t hwcap;
+ uint64_t hwcap2;
+ uint64_t hwcap3;
+} ifunc_arg_t;
+
+#include "ifunc-resolver.in"
diff --git a/gcc/testsuite/gcc.target/aarch64/ifunc-resolver-4.c
b/gcc/testsuite/gcc.target/aarch64/ifunc-resolver-4.c
new file mode 100644
index 000000000000..1b4ccbda1d4f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/ifunc-resolver-4.c
@@ -0,0 +1,16 @@
+/* { dg-do run } */
+/* { dg-require-ifunc "" } */
+/* { dg-require-effective-target mmap } */
+/* { dg-options "-Wno-experimental-fmv-target" } */
+
+#include <stdint.h>
+
+typedef struct {
+ uint64_t size;
+ uint64_t hwcap;
+ uint64_t hwcap2;
+ uint64_t hwcap3;
+ uint64_t hwcap4;
+} ifunc_arg_t;
+
+#include "ifunc-resolver.in"
diff --git a/gcc/testsuite/gcc.target/aarch64/ifunc-resolver.in
b/gcc/testsuite/gcc.target/aarch64/ifunc-resolver.in
new file mode 100644
index 000000000000..ada0b337f397
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/ifunc-resolver.in
@@ -0,0 +1,48 @@
+#include <unistd.h>
+#include <string.h>
+#include <sys/mman.h>
+
+/* Allocate memory buffer of size LEN with a protected page
+ following right after the buffer end so that any memory
+ accesses past the end of the buffer would trigger SEGFAUL. */
+void *allocate_mem (size_t len)
+{
+ size_t pagesize = sysconf (_SC_PAGESIZE);
+ char *m = mmap (NULL, pagesize * 2,
+ PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS,
+ -1, 0);
+ mprotect (m + pagesize, pagesize, PROT_NONE);
+ m = m + pagesize - len;
+ memset(m, 0, len);
+ return m;
+}
+
+int impl ()
+{
+ return 0;
+}
+
+#ifndef _IFUNC_ARG_HWCAP
+#define _IFUNC_ARG_HWCAP (1ULL << 62)
+#endif
+
+void
+__init_cpu_features_resolver (unsigned long hwcap, const void *arg);
+
+static void *
+fun_resolver (uint64_t a0, const uint64_t *a1)
+{
+ ifunc_arg_t *arg = allocate_mem (sizeof (ifunc_arg_t));
+ arg->size = sizeof (ifunc_arg_t);
+ /* Call this function with synthetic ifunc_arg_t arg. */
+ __init_cpu_features_resolver (_IFUNC_ARG_HWCAP, arg);
+ return (void *)(uintptr_t)impl;
+}
+
+int fun (void) __attribute__ ((ifunc ("fun_resolver")));
+
+int main (int argc, char *argv[])
+{
+ return fun ();
+}
