The only place left that looks at the old 'singlestep' global
variable is the TCG curr_cflags() function. Replace the old global
with a new 'one_insn_per_tb' which is defined in tcg-all.c and
declared in accel/tcg/internal.h. This keeps it restricted to the
TCG code, unlike 'singlestep' which was available to every file in
the system and defined in multiple different places for softmmu vs
linux-user vs bsd-user.
While we're making this change, use qatomic_read() and qatomic_set()
on the accesses to the new global, because TCG will read it without
holding a lock.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id:
20230417164041.684562-4-peter.maydell@linaro.org
*/
if (unlikely(cpu->singlestep_enabled)) {
cflags |= CF_NO_GOTO_TB | CF_NO_GOTO_PTR | CF_SINGLE_STEP | 1;
- } else if (singlestep) {
+ } else if (qatomic_read(&one_insn_per_tb)) {
cflags |= CF_NO_GOTO_TB | 1;
} else if (qemu_loglevel_mask(CPU_LOG_TB_NOCHAIN)) {
cflags |= CF_NO_GOTO_TB;
extern int64_t max_delay;
extern int64_t max_advance;
+extern bool one_insn_per_tb;
+
#endif /* ACCEL_TCG_INTERNAL_H */
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "qemu/accel.h"
+#include "qemu/atomic.h"
#include "qapi/qapi-builtin-visit.h"
#include "qemu/units.h"
#if !defined(CONFIG_USER_ONLY)
}
bool mttcg_enabled;
+bool one_insn_per_tb;
static int tcg_init_machine(MachineState *ms)
{
{
TCGState *s = TCG_STATE(obj);
s->one_insn_per_tb = value;
- /* For the moment, set the global also: this changes the behaviour */
- singlestep = value;
+ /* Set the global also: this changes the behaviour */
+ qatomic_set(&one_insn_per_tb, value);
}
static int tcg_gdbstub_supported_sstep_flags(void)
#include "host-os.h"
#include "target_arch_cpu.h"
-int singlestep;
static bool opt_one_insn_per_tb;
uintptr_t guest_base;
bool have_guest_base;
void *ptr, size_t len, bool is_write);
/* vl.c */
-extern int singlestep;
-
void list_cpus(void);
#endif /* CPU_COMMON_H */
char *exec_path;
char real_exec_path[PATH_MAX];
-int singlestep;
static bool opt_one_insn_per_tb;
static const char *argv0;
static const char *gdbstub;
bool vga_interface_created;
Chardev *parallel_hds[MAX_PARALLEL_PORTS];
int win2k_install_hack;
-int singlestep;
int fd_bootchk = 1;
int graphic_rotate;
QEMUOptionRom option_rom[MAX_OPTION_ROMS];