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/target/s390x/translate.c b/target/s390x/translate.c
index 6ecf764..d589fb2 100644
--- a/target/s390x/translate.c
+++ b/target/s390x/translate.c
@@ -554,7 +554,7 @@ static void gen_op_calc_cc(DisasContext *s)
 static bool use_exit_tb(DisasContext *s)
 {
     return (s->singlestep_enabled ||
-            (s->tb->cflags & CF_LAST_IO) ||
+            (tb_cflags(s->tb) & CF_LAST_IO) ||
             (s->tb->flags & FLAG_MASK_PER));
 }
 
@@ -5883,7 +5883,7 @@ void gen_intermediate_code(CPUState *cs, struct TranslationBlock *tb)
     next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
 
     num_insns = 0;
-    max_insns = tb->cflags & CF_COUNT_MASK;
+    max_insns = tb_cflags(tb) & CF_COUNT_MASK;
     if (max_insns == 0) {
         max_insns = CF_COUNT_MASK;
     }
@@ -5908,7 +5908,7 @@ void gen_intermediate_code(CPUState *cs, struct TranslationBlock *tb)
             break;
         }
 
-        if (num_insns == max_insns && (tb->cflags & CF_LAST_IO)) {
+        if (num_insns == max_insns && (tb_cflags(tb) & CF_LAST_IO)) {
             gen_io_start();
         }
 
@@ -5927,7 +5927,7 @@ void gen_intermediate_code(CPUState *cs, struct TranslationBlock *tb)
         }
     } while (status == NO_EXIT);
 
-    if (tb->cflags & CF_LAST_IO) {
+    if (tb_cflags(tb) & CF_LAST_IO) {
         gen_io_end();
     }