tcg: convert tb->cflags reads to tb_cflags(tb)

Convert all existing readers of tb->cflags to tb_cflags, so that we
use atomic_read and therefore avoid undefined behaviour in C11.

Note that the remaining setters/getters of the field are protected
by tb_lock, and therefore do not need conversion.

Luckily all readers access the field via 'tb->cflags' (so no foo.cflags,
bar->cflags in the code base), which makes the conversion easily
scriptable:

FILES=$(git grep 'tb->cflags' target include/exec/gen-icount.h \
	 accel/tcg/translator.c | cut -f1 -d':' | sort | uniq)

perl -pi -e 's/([^.>])tb->cflags/$1tb_cflags(tb)/g' $FILES
perl -pi -e 's/([a-z->.]*)(->|\.)tb->cflags/tb_cflags($1$2tb)/g' $FILES

Then manually fixed the few errors that checkpatch reported.

Compile-tested for all targets.

Suggested-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/include/exec/gen-icount.h b/include/exec/gen-icount.h
index 9b3cb14..48b566c 100644
--- a/include/exec/gen-icount.h
+++ b/include/exec/gen-icount.h
@@ -13,7 +13,7 @@ static inline void gen_tb_start(TranslationBlock *tb)
     TCGv_i32 count, imm;
 
     exitreq_label = gen_new_label();
-    if (tb->cflags & CF_USE_ICOUNT) {
+    if (tb_cflags(tb) & CF_USE_ICOUNT) {
         count = tcg_temp_local_new_i32();
     } else {
         count = tcg_temp_new_i32();
@@ -22,7 +22,7 @@ static inline void gen_tb_start(TranslationBlock *tb)
     tcg_gen_ld_i32(count, tcg_ctx.tcg_env,
                    -ENV_OFFSET + offsetof(CPUState, icount_decr.u32));
 
-    if (tb->cflags & CF_USE_ICOUNT) {
+    if (tb_cflags(tb) & CF_USE_ICOUNT) {
         imm = tcg_temp_new_i32();
         /* We emit a movi with a dummy immediate argument. Keep the insn index
          * of the movi so that we later (when we know the actual insn count)
@@ -36,7 +36,7 @@ static inline void gen_tb_start(TranslationBlock *tb)
 
     tcg_gen_brcondi_i32(TCG_COND_LT, count, 0, exitreq_label);
 
-    if (tb->cflags & CF_USE_ICOUNT) {
+    if (tb_cflags(tb) & CF_USE_ICOUNT) {
         tcg_gen_st16_i32(count, tcg_ctx.tcg_env,
                          -ENV_OFFSET + offsetof(CPUState, icount_decr.u16.low));
     }
@@ -46,7 +46,7 @@ static inline void gen_tb_start(TranslationBlock *tb)
 
 static inline void gen_tb_end(TranslationBlock *tb, int num_insns)
 {
-    if (tb->cflags & CF_USE_ICOUNT) {
+    if (tb_cflags(tb) & CF_USE_ICOUNT) {
         /* Update the num_insn immediate parameter now that we know
          * the actual insn count.  */
         tcg_set_insn_param(icount_start_insn_idx, 1, num_insns);