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accel/tcg: Use one_insn_per_tb global instead of old singlestep global

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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
This commit is contained in:
Peter Maydell 2023-04-17 17:40:34 +01:00
parent 93cbd6c91d
commit 0e33928cd9
7 changed files with 7 additions and 8 deletions
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2
include/exec/cpu-common.h
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@ -163,8 +163,6 @@ int cpu_memory_rw_debug(CPUState *cpu, vaddr addr,
void *ptr, size_t len, bool is_write);
/* vl.c */
extern int singlestep;
void list_cpus(void);
#endif /* CPU_COMMON_H */