linux_user=""
bsd_user=""
pie=""
-coroutine=""
plugins="$default_feature"
ninja=""
bindir="bin"
;;
--enable-fdt=*) fdt="$optarg"
;;
- --with-coroutine=*) coroutine="$optarg"
- ;;
--with-git=*) git="$optarg"
;;
--with-git-submodules=*)
--disable-werror disable compilation abort on warning
--disable-stack-protector disable compiler-provided stack protection
--cpu=CPU Build for host CPU [$cpu]
- --with-coroutine=BACKEND coroutine backend. Supported options:
- ucontext, sigaltstack, windows
--enable-plugins
enable plugins via shared library loading
--disable-containers don't use containers for cross-building
;;
esac
-##########################################
-# check and set a backend for coroutine
-
-# We prefer ucontext, but it's not always possible. The fallback
-# is sigcontext. On Windows the only valid backend is the Windows
-# specific one.
-
-ucontext_works=no
-if test "$darwin" != "yes"; then
- cat > $TMPC << EOF
-#include <ucontext.h>
-#ifdef __stub_makecontext
-#error Ignoring glibc stub makecontext which will always fail
-#endif
-int main(void) { makecontext(0, 0, 0); return 0; }
-EOF
- if compile_prog "" "" ; then
- ucontext_works=yes
- fi
-fi
-
-if test "$coroutine" = ""; then
- if test "$mingw32" = "yes"; then
- coroutine=win32
- elif test "$ucontext_works" = "yes"; then
- coroutine=ucontext
- else
- coroutine=sigaltstack
- fi
-else
- case $coroutine in
- windows)
- if test "$mingw32" != "yes"; then
- error_exit "'windows' coroutine backend only valid for Windows"
- fi
- # Unfortunately the user visible backend name doesn't match the
- # coroutine-*.c filename for this case, so we have to adjust it here.
- coroutine=win32
- ;;
- ucontext)
- if test "$ucontext_works" != "yes"; then
- error_exit "'ucontext' backend requested but makecontext not available"
- fi
- ;;
- sigaltstack)
- if test "$mingw32" = "yes"; then
- error_exit "only the 'windows' coroutine backend is valid for Windows"
- fi
- ;;
- *)
- error_exit "unknown coroutine backend $coroutine"
- ;;
- esac
-fi
-
########################################
# check if ccache is interfering with
# semantic analysis of macros
echo "CONFIG_BSD=y" >> $config_host_mak
fi
-echo "CONFIG_COROUTINE_BACKEND=$coroutine" >> $config_host_mak
-
if test "$plugins" = "yes" ; then
echo "CONFIG_PLUGIN=y" >> $config_host_mak
fi
qemu_ldflags += get_option('b_pie') ? '-static-pie' : '-static'
endif
+coroutine_backend = get_option('coroutine_backend')
+ucontext_probe = '''
+ #include <ucontext.h>
+ #ifdef __stub_makecontext
+ #error Ignoring glibc stub makecontext which will always fail
+ #endif
+ int main(void) { makecontext(0, 0, 0); return 0; }'''
+
+# On Windows the only valid backend is the Windows specific one.
+# For POSIX prefer ucontext, but it's not always possible. The fallback
+# is sigcontext.
+supported_backends = []
+if targetos == 'windows'
+ supported_backends += ['windows']
+else
+ if targetos != 'darwin' and cc.links(ucontext_probe)
+ supported_backends += ['ucontext']
+ endif
+ supported_backends += ['sigaltstack']
+endif
+
+if coroutine_backend == 'auto'
+ coroutine_backend = supported_backends[0]
+elif coroutine_backend not in supported_backends
+ error('"@0@" backend requested but not available. Available backends: @1@' \
+ .format(coroutine_backend, ', '.join(supported_backends)))
+endif
+
# Compiles if SafeStack *not* enabled
safe_stack_probe = '''
int main(void)
qemu_cflags += safe_stack_arg
qemu_ldflags += safe_stack_arg
endif
-if get_option('safe_stack') and config_host['CONFIG_COROUTINE_BACKEND'] != 'ucontext'
+if get_option('safe_stack') and coroutine_backend != 'ucontext'
error('SafeStack is only supported with the ucontext coroutine backend')
endif
# Block layer
summary_info = {}
-summary_info += {'coroutine backend': config_host['CONFIG_COROUTINE_BACKEND']}
+summary_info += {'coroutine backend': coroutine_backend}
summary_info += {'coroutine pool': have_coroutine_pool}
if have_block
summary_info += {'Block whitelist (rw)': get_option('block_drv_rw_whitelist')}
description: 'fuzzing engine library for OSS-Fuzz')
option('trace_file', type: 'string', value: 'trace',
description: 'Trace file prefix for simple backend')
+option('coroutine_backend', type: 'combo',
+ choices: ['ucontext', 'sigaltstack', 'windows', 'auto'],
+ value: 'auto', description: 'coroutine backend to use')
# Everything else can be set via --enable/--disable-* option
# on the configure script command line. After adding an option
OPTION_NAMES = {
"b_coverage": "gcov",
"b_lto": "lto",
+ "coroutine_backend": "with-coroutine",
"malloc": "enable-malloc",
"pkgversion": "with-pkgversion",
"qemu_firmwarepath": "firmwarepath",
printf "%s\n" ' --sysconfdir=VALUE Sysconf data directory [etc]'
printf "%s\n" ' --tls-priority=VALUE Default TLS protocol/cipher priority string'
printf "%s\n" ' [NORMAL]'
+ printf "%s\n" ' --with-coroutine=CHOICE coroutine backend to use (choices:'
+ printf "%s\n" ' auto/sigaltstack/ucontext/windows)'
printf "%s\n" ' --with-pkgversion=VALUE use specified string as sub-version of the'
printf "%s\n" ' package'
printf "%s\n" ' --with-trace-file=VALUE Trace file prefix for simple backend [trace]'
--disable-cocoa) printf "%s" -Dcocoa=disabled ;;
--enable-coreaudio) printf "%s" -Dcoreaudio=enabled ;;
--disable-coreaudio) printf "%s" -Dcoreaudio=disabled ;;
+ --with-coroutine=*) quote_sh "-Dcoroutine_backend=$2" ;;
--enable-coroutine-pool) printf "%s" -Dcoroutine_pool=true ;;
--disable-coroutine-pool) printf "%s" -Dcoroutine_pool=false ;;
--enable-crypto-afalg) printf "%s" -Dcrypto_afalg=enabled ;;
+++ /dev/null
-/*
- * Win32 coroutine initialization code
- *
- * Copyright (c) 2011 Kevin Wolf <kwolf@redhat.com>
- *
- * 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/coroutine_int.h"
-#include "qemu/coroutine-tls.h"
-
-typedef struct
-{
- Coroutine base;
-
- LPVOID fiber;
- CoroutineAction action;
-} CoroutineWin32;
-
-QEMU_DEFINE_STATIC_CO_TLS(CoroutineWin32, leader);
-QEMU_DEFINE_STATIC_CO_TLS(Coroutine *, current);
-
-/* This function is marked noinline to prevent GCC from inlining it
- * into coroutine_trampoline(). If we allow it to do that then it
- * hoists the code to get the address of the TLS variable "current"
- * out of the while() loop. This is an invalid transformation because
- * the SwitchToFiber() call may be called when running thread A but
- * return in thread B, and so we might be in a different thread
- * context each time round the loop.
- */
-CoroutineAction __attribute__((noinline))
-qemu_coroutine_switch(Coroutine *from_, Coroutine *to_,
- CoroutineAction action)
-{
- CoroutineWin32 *from = DO_UPCAST(CoroutineWin32, base, from_);
- CoroutineWin32 *to = DO_UPCAST(CoroutineWin32, base, to_);
-
- set_current(to_);
-
- to->action = action;
- SwitchToFiber(to->fiber);
- return from->action;
-}
-
-static void CALLBACK coroutine_trampoline(void *co_)
-{
- Coroutine *co = co_;
-
- while (true) {
- co->entry(co->entry_arg);
- qemu_coroutine_switch(co, co->caller, COROUTINE_TERMINATE);
- }
-}
-
-Coroutine *qemu_coroutine_new(void)
-{
- const size_t stack_size = COROUTINE_STACK_SIZE;
- CoroutineWin32 *co;
-
- co = g_malloc0(sizeof(*co));
- co->fiber = CreateFiber(stack_size, coroutine_trampoline, &co->base);
- return &co->base;
-}
-
-void qemu_coroutine_delete(Coroutine *co_)
-{
- CoroutineWin32 *co = DO_UPCAST(CoroutineWin32, base, co_);
-
- DeleteFiber(co->fiber);
- g_free(co);
-}
-
-Coroutine *qemu_coroutine_self(void)
-{
- Coroutine *current = get_current();
-
- if (!current) {
- CoroutineWin32 *leader = get_ptr_leader();
-
- current = &leader->base;
- set_current(current);
- leader->fiber = ConvertThreadToFiber(NULL);
- }
- return current;
-}
-
-bool qemu_in_coroutine(void)
-{
- Coroutine *current = get_current();
-
- return current && current->caller;
-}
--- /dev/null
+/*
+ * Win32 coroutine initialization code
+ *
+ * Copyright (c) 2011 Kevin Wolf <kwolf@redhat.com>
+ *
+ * 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/coroutine_int.h"
+#include "qemu/coroutine-tls.h"
+
+typedef struct
+{
+ Coroutine base;
+
+ LPVOID fiber;
+ CoroutineAction action;
+} CoroutineWin32;
+
+QEMU_DEFINE_STATIC_CO_TLS(CoroutineWin32, leader);
+QEMU_DEFINE_STATIC_CO_TLS(Coroutine *, current);
+
+/* This function is marked noinline to prevent GCC from inlining it
+ * into coroutine_trampoline(). If we allow it to do that then it
+ * hoists the code to get the address of the TLS variable "current"
+ * out of the while() loop. This is an invalid transformation because
+ * the SwitchToFiber() call may be called when running thread A but
+ * return in thread B, and so we might be in a different thread
+ * context each time round the loop.
+ */
+CoroutineAction __attribute__((noinline))
+qemu_coroutine_switch(Coroutine *from_, Coroutine *to_,
+ CoroutineAction action)
+{
+ CoroutineWin32 *from = DO_UPCAST(CoroutineWin32, base, from_);
+ CoroutineWin32 *to = DO_UPCAST(CoroutineWin32, base, to_);
+
+ set_current(to_);
+
+ to->action = action;
+ SwitchToFiber(to->fiber);
+ return from->action;
+}
+
+static void CALLBACK coroutine_trampoline(void *co_)
+{
+ Coroutine *co = co_;
+
+ while (true) {
+ co->entry(co->entry_arg);
+ qemu_coroutine_switch(co, co->caller, COROUTINE_TERMINATE);
+ }
+}
+
+Coroutine *qemu_coroutine_new(void)
+{
+ const size_t stack_size = COROUTINE_STACK_SIZE;
+ CoroutineWin32 *co;
+
+ co = g_malloc0(sizeof(*co));
+ co->fiber = CreateFiber(stack_size, coroutine_trampoline, &co->base);
+ return &co->base;
+}
+
+void qemu_coroutine_delete(Coroutine *co_)
+{
+ CoroutineWin32 *co = DO_UPCAST(CoroutineWin32, base, co_);
+
+ DeleteFiber(co->fiber);
+ g_free(co);
+}
+
+Coroutine *qemu_coroutine_self(void)
+{
+ Coroutine *current = get_current();
+
+ if (!current) {
+ CoroutineWin32 *leader = get_ptr_leader();
+
+ current = &leader->base;
+ set_current(current);
+ leader->fiber = ConvertThreadToFiber(NULL);
+ }
+ return current;
+}
+
+bool qemu_in_coroutine(void)
+{
+ Coroutine *current = get_current();
+
+ return current && current->caller;
+}
util_ss.add(files('base64.c'))
util_ss.add(files('main-loop.c'))
util_ss.add(files('qemu-coroutine.c', 'qemu-coroutine-lock.c', 'qemu-coroutine-io.c'))
- util_ss.add(files('coroutine-@0@.c'.format(config_host['CONFIG_COROUTINE_BACKEND'])))
+ util_ss.add(files(f'coroutine-@coroutine_backend@.c'))
util_ss.add(files('thread-pool.c', 'qemu-timer.c'))
util_ss.add(files('qemu-sockets.c'))
endif
projects / qemu.git / commitdiff