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tcg: Split out tcg_raise_tb_overflow

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

Backports db6b7d0c6936cd209e3e8d95aea61ad29ceef5e6
This commit is contained in:
Richard Henderson 2021-03-09 13:23:01 -05:00 committed by Lioncash
parent 6ef897bbad
commit d83b1ea283
1 changed files with 7 additions and 2 deletions
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9
qemu/tcg/tcg.c
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@ -275,6 +275,12 @@ static bool tcg_resolve_relocs(TCGContext *s)
return true; return true;
} }
/* 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_PFX1(P, A) P##A
#define C_PFX2(P, A, B) P##A##_##B #define C_PFX2(P, A, B) P##A##_##B
#define C_PFX3(P, A, B, C) P##A##_##B##_##C #define C_PFX3(P, A, B, C) P##A##_##B##_##C
@ -648,8 +654,7 @@ static TCGTemp *tcg_temp_alloc(TCGContext *s)
int n = s->nb_temps++; int n = s->nb_temps++;
if (n >= TCG_MAX_TEMPS) { if (n >= TCG_MAX_TEMPS) {
/* Signal overflow, starting over with fewer guest insns. */ tcg_raise_tb_overflow(s);
siglongjmp(s->jmp_trans, -2);
} }
return memset(&s->temps[n], 0, sizeof(TCGTemp)); return memset(&s->temps[n], 0, sizeof(TCGTemp));
} }