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util/log: Rename qemu_log_lock to qemu_log_trylock

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This function can fail, which makes it more like ftrylockfile
or pthread_mutex_trylock than flockfile or pthread_mutex_lock,
so rename it.

To closer match the other trylock functions, release rcu_read_lock
along the failure path, so that qemu_log_unlock need not be called
on failure.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220417183019.755276-8-richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-04-17 11:29:47 -07:00
parent c59fe6e536
commit c60f599bcb
12 changed files with 18 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

2
accel/tcg/cpu-exec.c
View file

@ -214,7 +214,7 @@ static inline void log_cpu_exec(target_ulong pc, CPUState *cpu,
#if defined(DEBUG_DISAS)
if (qemu_loglevel_mask(CPU_LOG_TB_CPU)) {
FILE *logfile = qemu_log_lock();
FILE *logfile = qemu_log_trylock();
int flags = 0;
if (qemu_loglevel_mask(CPU_LOG_TB_FPU)) {

2
accel/tcg/translate-all.c
View file

@ -1527,7 +1527,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
#ifdef DEBUG_DISAS
if (qemu_loglevel_mask(CPU_LOG_TB_OUT_ASM) &&
qemu_log_in_addr_range(tb->pc)) {
FILE *logfile = qemu_log_lock();
FILE *logfile = qemu_log_trylock();
int code_size, data_size;
const tcg_target_ulong *rx_data_gen_ptr;
size_t chunk_start;

2
accel/tcg/translator.c
View file

@ -139,7 +139,7 @@ void translator_loop(const TranslatorOps *ops, DisasContextBase *db,
#ifdef DEBUG_DISAS
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)
&& qemu_log_in_addr_range(db->pc_first)) {
FILE *logfile = qemu_log_lock();
FILE *logfile = qemu_log_trylock();
qemu_log("----------------\n");
ops->disas_log(db, cpu);
qemu_log("\n");