[v3,02/70] tcg: Split out tcg_raise_tb_overflow

Commit Message

Richard Henderson Feb. 8, 2021, 2:36 a.m. UTC

Allow other places in tcg to restart with a smaller tb.

Signed-off-by: Richard Henderson <[e-mail]>
---
 tcg/tcg.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

Comments

Alex Bennée March 5, 2021, 2:48 p.m. UTC | #1

Richard Henderson <[e-mail]> writes:

> Allow other places in tcg to restart with a smaller tb.
>
> Signed-off-by: Richard Henderson <[e-mail]>

Reviewed-by: Alex Bennée <[e-mail]>

Patch

diff --git a/tcg/tcg.c b/tcg/tcg.c
index 63a12b197b..bbe3dcee03 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -346,6 +346,12 @@  static void set_jmp_reset_offset(TCGContext *s, int which)
     s->tb_jmp_reset_offset[which] = tcg_current_code_size(s);
 }
 
+/* Signal overflow, starting over with fewer guest insns. */
+static void QEMU_NORETURN tcg_raise_tb_overflow(TCGContext *s)
+{
+    siglongjmp(s->jmp_trans, -2);
+}
+
 #define C_PFX1(P, A)                    P##A
 #define C_PFX2(P, A, B)                 P##A##_##B
 #define C_PFX3(P, A, B, C)              P##A##_##B##_##C
@@ -1310,8 +1316,7 @@  static TCGTemp *tcg_temp_alloc(TCGContext *s)
     int n = s->nb_temps++;
 
     if (n >= TCG_MAX_TEMPS) {
-        /* Signal overflow, starting over with fewer guest insns. */
-        siglongjmp(s->jmp_trans, -2);
+        tcg_raise_tb_overflow(s);
     }
     return memset(&s->temps[n], 0, sizeof(TCGTemp));
 }