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-rw-r--r--util/atomic64.c1
-rw-r--r--util/memalign.c92
-rw-r--r--util/meson.build1
-rw-r--r--util/oslib-posix.c46
-rw-r--r--util/oslib-win32.c35
-rw-r--r--util/qht.c1
6 files changed, 95 insertions, 81 deletions
diff --git a/util/atomic64.c b/util/atomic64.c
index 22983a970f..c20d071d8e 100644
--- a/util/atomic64.c
+++ b/util/atomic64.c
@@ -8,6 +8,7 @@
#include "qemu/atomic.h"
#include "qemu/thread.h"
#include "qemu/cacheinfo.h"
+#include "qemu/memalign.h"
#ifdef CONFIG_ATOMIC64
#error This file must only be compiled if !CONFIG_ATOMIC64
diff --git a/util/memalign.c b/util/memalign.c
new file mode 100644
index 0000000000..c199ae7073
--- /dev/null
+++ b/util/memalign.c
@@ -0,0 +1,92 @@
+/*
+ * memalign.c: Allocate an aligned memory region
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (c) 2010-2016 Red Hat, Inc.
+ * Copyright (c) 2022 Linaro Ltd
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/host-utils.h"
+#include "qemu/memalign.h"
+#include "trace.h"
+
+void *qemu_try_memalign(size_t alignment, size_t size)
+{
+ void *ptr;
+
+ if (alignment < sizeof(void*)) {
+ alignment = sizeof(void*);
+ } else {
+ g_assert(is_power_of_2(alignment));
+ }
+
+ /*
+ * Handling of 0 allocations varies among the different
+ * platform APIs (for instance _aligned_malloc() will
+ * fail) -- ensure that we always return a valid non-NULL
+ * pointer that can be freed by qemu_vfree().
+ */
+ if (size == 0) {
+ size++;
+ }
+#if defined(CONFIG_POSIX_MEMALIGN)
+ int ret;
+ ret = posix_memalign(&ptr, alignment, size);
+ if (ret != 0) {
+ errno = ret;
+ ptr = NULL;
+ }
+#elif defined(CONFIG_ALIGNED_MALLOC)
+ ptr = _aligned_malloc(size, alignment);
+#elif defined(CONFIG_VALLOC)
+ ptr = valloc(size);
+#elif defined(CONFIG_MEMALIGN)
+ ptr = memalign(alignment, size);
+#else
+ #error No function to allocate aligned memory available
+#endif
+ trace_qemu_memalign(alignment, size, ptr);
+ return ptr;
+}
+
+void *qemu_memalign(size_t alignment, size_t size)
+{
+ void *p = qemu_try_memalign(alignment, size);
+ if (p) {
+ return p;
+ }
+ fprintf(stderr,
+ "qemu_memalign: failed to allocate %zu bytes at alignment %zu: %s\n",
+ size, alignment, strerror(errno));
+ abort();
+}
+
+void qemu_vfree(void *ptr)
+{
+ trace_qemu_vfree(ptr);
+#if !defined(CONFIG_POSIX_MEMALIGN) && defined(CONFIG_ALIGNED_MALLOC)
+ /* Only Windows _aligned_malloc needs a special free function */
+ _aligned_free(ptr);
+#else
+ free(ptr);
+#endif
+}
diff --git a/util/meson.build b/util/meson.build
index 3736988b9f..f6ee74ad0c 100644
--- a/util/meson.build
+++ b/util/meson.build
@@ -51,6 +51,7 @@ util_ss.add(when: 'CONFIG_POSIX', if_true: files('drm.c'))
util_ss.add(files('guest-random.c'))
util_ss.add(files('yank.c'))
util_ss.add(files('int128.c'))
+util_ss.add(files('memalign.c'))
if have_user
util_ss.add(files('selfmap.c'))
diff --git a/util/oslib-posix.c b/util/oslib-posix.c
index f2be7321c5..2ebfb75057 100644
--- a/util/oslib-posix.c
+++ b/util/oslib-posix.c
@@ -199,46 +199,6 @@ fail_close:
return false;
}
-void *qemu_oom_check(void *ptr)
-{
- if (ptr == NULL) {
- fprintf(stderr, "Failed to allocate memory: %s\n", strerror(errno));
- abort();
- }
- return ptr;
-}
-
-void *qemu_try_memalign(size_t alignment, size_t size)
-{
- void *ptr;
-
- if (alignment < sizeof(void*)) {
- alignment = sizeof(void*);
- } else {
- g_assert(is_power_of_2(alignment));
- }
-
-#if defined(CONFIG_POSIX_MEMALIGN)
- int ret;
- ret = posix_memalign(&ptr, alignment, size);
- if (ret != 0) {
- errno = ret;
- ptr = NULL;
- }
-#elif defined(CONFIG_BSD)
- ptr = valloc(size);
-#else
- ptr = memalign(alignment, size);
-#endif
- trace_qemu_memalign(alignment, size, ptr);
- return ptr;
-}
-
-void *qemu_memalign(size_t alignment, size_t size)
-{
- return qemu_oom_check(qemu_try_memalign(alignment, size));
-}
-
/* alloc shared memory pages */
void *qemu_anon_ram_alloc(size_t size, uint64_t *alignment, bool shared,
bool noreserve)
@@ -260,12 +220,6 @@ void *qemu_anon_ram_alloc(size_t size, uint64_t *alignment, bool shared,
return ptr;
}
-void qemu_vfree(void *ptr)
-{
- trace_qemu_vfree(ptr);
- free(ptr);
-}
-
void qemu_anon_ram_free(void *ptr, size_t size)
{
trace_qemu_anon_ram_free(ptr, size);
diff --git a/util/oslib-win32.c b/util/oslib-win32.c
index af559ef339..4b1ce0be4b 100644
--- a/util/oslib-win32.c
+++ b/util/oslib-win32.c
@@ -44,35 +44,6 @@
/* this must come after including "trace.h" */
#include <shlobj.h>
-void *qemu_oom_check(void *ptr)
-{
- if (ptr == NULL) {
- fprintf(stderr, "Failed to allocate memory: %lu\n", GetLastError());
- abort();
- }
- return ptr;
-}
-
-void *qemu_try_memalign(size_t alignment, size_t size)
-{
- void *ptr;
-
- g_assert(size != 0);
- if (alignment < sizeof(void *)) {
- alignment = sizeof(void *);
- } else {
- g_assert(is_power_of_2(alignment));
- }
- ptr = _aligned_malloc(size, alignment);
- trace_qemu_memalign(alignment, size, ptr);
- return ptr;
-}
-
-void *qemu_memalign(size_t alignment, size_t size)
-{
- return qemu_oom_check(qemu_try_memalign(alignment, size));
-}
-
static int get_allocation_granularity(void)
{
SYSTEM_INFO system_info;
@@ -104,12 +75,6 @@ void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared,
return ptr;
}
-void qemu_vfree(void *ptr)
-{
- trace_qemu_vfree(ptr);
- _aligned_free(ptr);
-}
-
void qemu_anon_ram_free(void *ptr, size_t size)
{
trace_qemu_anon_ram_free(ptr, size);
diff --git a/util/qht.c b/util/qht.c
index 079605121b..065fc501f4 100644
--- a/util/qht.c
+++ b/util/qht.c
@@ -69,6 +69,7 @@
#include "qemu/qht.h"
#include "qemu/atomic.h"
#include "qemu/rcu.h"
+#include "qemu/memalign.h"
//#define QHT_DEBUG
generated by cgit v1.2.3 (git 2.26.2) at 2025-01-10 03:18:12 +0000