*: Use fprintf between qemu_log_trylock/unlock

Inside qemu_log, we perform qemu_log_trylock/unlock, which need
not be done if we have already performed the lock beforehand.

Always check the result of qemu_log_trylock -- only checking
qemu_loglevel_mask races with the acquisition of the lock on
the logfile.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220417183019.755276-10-richard.henderson@linaro.org>

1 files changed, 8 insertions, 6 deletions

diff --git a/cpu.c b/cpu.c
index 9db144761d..ded4173d40 100644
--- a/cpu.c
+++ b/cpu.c
@@ -400,12 +400,14 @@ void cpu_abort(CPUState *cpu, const char *fmt, ...)
     cpu_dump_state(cpu, stderr, CPU_DUMP_FPU | CPU_DUMP_CCOP);
     if (qemu_log_separate()) {
         FILE *logfile = qemu_log_trylock();
-        qemu_log("qemu: fatal: ");
-        qemu_log_vprintf(fmt, ap2);
-        qemu_log("\n");
-        log_cpu_state(cpu, CPU_DUMP_FPU | CPU_DUMP_CCOP);
-        qemu_log_flush();
-        qemu_log_unlock(logfile);
+        if (logfile) {
+            fprintf(logfile, "qemu: fatal: ");
+            vfprintf(logfile, fmt, ap2);
+            fprintf(logfile, "\n");
+            cpu_dump_state(cpu, logfile, CPU_DUMP_FPU | CPU_DUMP_CCOP);
+            qemu_log_flush();
+            qemu_log_unlock(logfile);
+        }
         qemu_log_close();
     }
     va_end(ap2);