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tcg: Bake tb_destroy() into tcg_region_tree

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The function is called only at tcg_gen_code() when duplicated TBs
are translated by different threads, and when the tcg_region_tree
is reset. Bake it into the underlying GTree as its value destroy
function to unite these situations.
Also remove tcg_region_tree_traverse() which now becomes useless.

Signed-off-by: Liren Wei <lrwei@bupt.edu.cn>
Message-Id: <8dc352f08d038c4e7a1f5f56962398cdc700c3aa.1625404483.git.lrwei@bupt.edu.cn>
[rth: Name the new tb_tc_cmp parameter correctly.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Liren Wei 2021-07-04 22:31:27 +08:00 committed by Richard Henderson
parent f4cba756cb
commit 834361efd9
3 changed files with 8 additions and 18 deletions
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6
accel/tcg/translate-all.c
View file

@ -378,11 +378,6 @@ static int cpu_restore_state_from_tb(CPUState *cpu, TranslationBlock *tb,
return 0;
}
void tb_destroy(TranslationBlock *tb)
{
qemu_spin_destroy(&tb->jmp_lock);
}
bool cpu_restore_state(CPUState *cpu, uintptr_t host_pc, bool will_exit)
{
/*
@ -1681,7 +1676,6 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
orig_aligned -= ROUND_UP(sizeof(*tb), qemu_icache_linesize);
qatomic_set(&tcg_ctx->code_gen_ptr, (void *)orig_aligned);
tb_destroy(tb);
tcg_tb_remove(tb);
return existing_tb;
}

1
include/tcg/tcg.h
View file

@ -808,7 +808,6 @@ void *tcg_malloc_internal(TCGContext *s, int size);
void tcg_pool_reset(TCGContext *s);
TranslationBlock *tcg_tb_alloc(TCGContext *s);
void tb_destroy(TranslationBlock *tb);
void tcg_region_reset_all(void);
size_t tcg_code_size(void);

19
tcg/region.c
View file

@ -112,7 +112,7 @@ static int ptr_cmp_tb_tc(const void *ptr, const struct tb_tc *s)
return 0;
}
static gint tb_tc_cmp(gconstpointer ap, gconstpointer bp)
static gint tb_tc_cmp(gconstpointer ap, gconstpointer bp, gpointer userdata)
{
const struct tb_tc *a = ap;
const struct tb_tc *b = bp;
@ -143,6 +143,12 @@ static gint tb_tc_cmp(gconstpointer ap, gconstpointer bp)
return ptr_cmp_tb_tc(b->ptr, a);
}
static void tb_destroy(gpointer value)
{
TranslationBlock *tb = value;
qemu_spin_destroy(&tb->jmp_lock);
}
static void tcg_region_trees_init(void)
{
size_t i;
@ -153,7 +159,7 @@ static void tcg_region_trees_init(void)
struct tcg_region_tree *rt = region_trees + i * tree_size;
qemu_mutex_init(&rt->lock);
rt->tree = g_tree_new(tb_tc_cmp);
rt->tree = g_tree_new_full(tb_tc_cmp, NULL, NULL, tb_destroy);
}
}
@ -277,14 +283,6 @@ size_t tcg_nb_tbs(void)
return nb_tbs;
}
static gboolean tcg_region_tree_traverse(gpointer k, gpointer v, gpointer data)
{
TranslationBlock *tb = v;
tb_destroy(tb);
return FALSE;
}
static void tcg_region_tree_reset_all(void)
{
size_t i;
@ -293,7 +291,6 @@ static void tcg_region_tree_reset_all(void)
for (i = 0; i < region.n; i++) {
struct tcg_region_tree *rt = region_trees + i * tree_size;
g_tree_foreach(rt->tree, tcg_region_tree_traverse, NULL);
/* Increment the refcount first so that destroy acts as a reset */
g_tree_ref(rt->tree);
g_tree_destroy(rt->tree);