mirror of
https://github.com/Motorhead1991/qemu.git
synced 2025-07-27 04:13:53 -06:00
4cd5a25557
On Emscripten, function pointer casts can result in runtime failures due to strict function signature checks. This affects the use of g_list_sort and g_slist_sort, which internally perform function pointer casts that are not supported by Emscripten. To avoid these issues, g_list_sort_with_data and g_slist_sort_with_data should be used instead, as they do not rely on function pointer casting. Signed-off-by: Kohei Tokunaga <ktokunaga.mail@gmail.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Link: https://lore.kernel.org/r/fa57c8069d6c723f5b947560677f4ca596334330.1745820062.git.ktokunaga.mail@gmail.com Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
138 lines
3.8 KiB
C
138 lines
3.8 KiB
C
/*
|
|
* GLIB Compatibility Functions
|
|
*
|
|
* Copyright IBM, Corp. 2013
|
|
*
|
|
* Authors:
|
|
* Anthony Liguori <aliguori@us.ibm.com>
|
|
* Michael Tokarev <mjt@tls.msk.ru>
|
|
* Paolo Bonzini <pbonzini@redhat.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*
|
|
*/
|
|
|
|
#ifndef QEMU_GLIB_COMPAT_H
|
|
#define QEMU_GLIB_COMPAT_H
|
|
|
|
/* Ask for warnings for anything that was marked deprecated in
|
|
* the defined version, or before. It is a candidate for rewrite.
|
|
*/
|
|
#define GLIB_VERSION_MIN_REQUIRED GLIB_VERSION_2_66
|
|
|
|
/* Ask for warnings if code tries to use function that did not
|
|
* exist in the defined version. These risk breaking builds
|
|
*/
|
|
#define GLIB_VERSION_MAX_ALLOWED GLIB_VERSION_2_66
|
|
|
|
#pragma GCC diagnostic push
|
|
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
|
|
|
|
#include <glib.h>
|
|
#if defined(G_OS_UNIX)
|
|
#include <glib-unix.h>
|
|
#include <sys/types.h>
|
|
#include <pwd.h>
|
|
#endif
|
|
|
|
/*
|
|
* These functions perform function pointer casts which can cause function call
|
|
* failure on Emscripten. Use g_slist_sort_with_data and g_list_sort_with_data
|
|
* instead of these functions.
|
|
*/
|
|
#pragma GCC poison g_slist_sort g_list_sort
|
|
|
|
/*
|
|
* Note that because of the GLIB_VERSION_MAX_ALLOWED constant above, allowing
|
|
* use of functions from newer GLib via this compat header needs a little
|
|
* trickery to prevent warnings being emitted.
|
|
*
|
|
* Consider a function from newer glib-X.Y that we want to use
|
|
*
|
|
* int g_foo(const char *wibble)
|
|
*
|
|
* We must define a static inline function with the same signature that does
|
|
* what we need, but with a "_compat" suffix e.g.
|
|
*
|
|
* static inline void g_foo_compat(const char *wibble)
|
|
* {
|
|
* #if GLIB_CHECK_VERSION(X, Y, 0)
|
|
* g_foo(wibble)
|
|
* #else
|
|
* g_something_equivalent_in_older_glib(wibble);
|
|
* #endif
|
|
* }
|
|
*
|
|
* The #pragma at the top of this file turns off -Wdeprecated-declarations,
|
|
* ensuring this wrapper function impl doesn't trigger the compiler warning
|
|
* about using too new glib APIs. Finally we can do
|
|
*
|
|
* #define g_foo(a) g_foo_compat(a)
|
|
*
|
|
* So now the code elsewhere in QEMU, which *does* have the
|
|
* -Wdeprecated-declarations warning active, can call g_foo(...) as normal,
|
|
* without generating warnings.
|
|
*/
|
|
|
|
/*
|
|
* g_memdup2_qemu:
|
|
* @mem: (nullable): the memory to copy.
|
|
* @byte_size: the number of bytes to copy.
|
|
*
|
|
* Allocates @byte_size bytes of memory, and copies @byte_size bytes into it
|
|
* from @mem. If @mem is %NULL it returns %NULL.
|
|
*
|
|
* This replaces g_memdup(), which was prone to integer overflows when
|
|
* converting the argument from a #gsize to a #guint.
|
|
*
|
|
* This static inline version is a backport of the new public API from
|
|
* GLib 2.68, kept internal to GLib for backport to older stable releases.
|
|
* See https://gitlab.gnome.org/GNOME/glib/-/issues/2319.
|
|
*
|
|
* Returns: (nullable): a pointer to the newly-allocated copy of the memory,
|
|
* or %NULL if @mem is %NULL.
|
|
*/
|
|
static inline gpointer g_memdup2_qemu(gconstpointer mem, gsize byte_size)
|
|
{
|
|
#if GLIB_CHECK_VERSION(2, 68, 0)
|
|
return g_memdup2(mem, byte_size);
|
|
#else
|
|
gpointer new_mem;
|
|
|
|
if (mem && byte_size != 0) {
|
|
new_mem = g_malloc(byte_size);
|
|
memcpy(new_mem, mem, byte_size);
|
|
} else {
|
|
new_mem = NULL;
|
|
}
|
|
|
|
return new_mem;
|
|
#endif
|
|
}
|
|
#define g_memdup2(m, s) g_memdup2_qemu(m, s)
|
|
|
|
static inline bool
|
|
qemu_g_test_slow(void)
|
|
{
|
|
static int cached = -1;
|
|
if (cached == -1) {
|
|
cached = g_test_slow() || getenv("G_TEST_SLOW") != NULL;
|
|
}
|
|
return cached;
|
|
}
|
|
|
|
#undef g_test_slow
|
|
#undef g_test_thorough
|
|
#undef g_test_quick
|
|
#define g_test_slow() qemu_g_test_slow()
|
|
#define g_test_thorough() qemu_g_test_slow()
|
|
#define g_test_quick() (!qemu_g_test_slow())
|
|
|
|
#pragma GCC diagnostic pop
|
|
|
|
#ifndef G_NORETURN
|
|
#define G_NORETURN G_GNUC_NORETURN
|
|
#endif
|
|
|
|
#endif
|