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From: Pierrick Bouvier <pierrick.bouvier@linaro.org>
To: qemu-devel@nongnu.org
Cc: Paolo Bonzini <pbonzini@redhat.com>, philmd@linaro.org,
Mahmoud Mandour <ma.mandourr@gmail.com>, richard.henderson@linaro.org,
Pierrick Bouvier <pierrick.bouvier@linaro.org>,
=?UTF-8?q?Alex=20Benn=C3=A9e?= <alex.bennee@linaro.org>,
Thomas Huth <thuth@redhat.com>, Alexandre Iooss <erdnaxe@crans.org>
Subject: [PATCH v2 07/11] contrib/plugins/hotblocks: fix 32-bit build
Date: Tue, 17 Dec 2024 14:38:21 -0800
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Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
contrib/plugins/hotblocks.c | 29 ++++++++++++++++++++++++-----
1 file changed, 24 insertions(+), 5 deletions(-)
diff --git a/contrib/plugins/hotblocks.c b/contrib/plugins/hotblocks.c
index 02bc5078bdd..f12bfb7a267 100644
--- a/contrib/plugins/hotblocks.c
+++ b/contrib/plugins/hotblocks.c
@@ -29,7 +29,7 @@ static guint64 limit =3D 20;
*
* The internals of the TCG are not exposed to plugins so we can only
* get the starting PC for each block. We cheat this slightly by
- * xor'ing the number of instructions to the hash to help
+ * checking the number of instructions as well to help
* differentiate.
*/
typedef struct {
@@ -50,6 +50,20 @@ static gint cmp_exec_count(gconstpointer a, gconstpointe=
r b)
return count_a > count_b ? -1 : 1;
}
=20
+static guint exec_count_hash(gconstpointer v)
+{
+ const ExecCount *e =3D v;
+ return e->start_addr ^ e->insns;
+}
+
+static gboolean exec_count_equal(gconstpointer v1, gconstpointer v2)
+{
+ const ExecCount *ea =3D v1;
+ const ExecCount *eb =3D v2;
+ return (ea->start_addr =3D=3D eb->start_addr) &&
+ (ea->insns =3D=3D eb->insns);
+}
+
static void exec_count_free(gpointer key, gpointer value, gpointer user_da=
ta)
{
ExecCount *cnt =3D value;
@@ -91,7 +105,7 @@ static void plugin_exit(qemu_plugin_id_t id, void *p)
=20
static void plugin_init(void)
{
- hotblocks =3D g_hash_table_new(NULL, g_direct_equal);
+ hotblocks =3D g_hash_table_new(exec_count_hash, exec_count_equal);
}
=20
static void vcpu_tb_exec(unsigned int cpu_index, void *udata)
@@ -111,10 +125,15 @@ static void vcpu_tb_trans(qemu_plugin_id_t id, struct=
qemu_plugin_tb *tb)
ExecCount *cnt;
uint64_t pc =3D qemu_plugin_tb_vaddr(tb);
size_t insns =3D qemu_plugin_tb_n_insns(tb);
- uint64_t hash =3D pc ^ insns;
=20
g_mutex_lock(&lock);
- cnt =3D (ExecCount *) g_hash_table_lookup(hotblocks, (gconstpointer) h=
ash);
+ {
+ ExecCount e;
+ e.start_addr =3D pc;
+ e.insns =3D insns;
+ cnt =3D (ExecCount *) g_hash_table_lookup(hotblocks, &e);
+ }
+
if (cnt) {
cnt->trans_count++;
} else {
@@ -123,7 +142,7 @@ static void vcpu_tb_trans(qemu_plugin_id_t id, struct q=
emu_plugin_tb *tb)
cnt->trans_count =3D 1;
cnt->insns =3D insns;
cnt->exec_count =3D qemu_plugin_scoreboard_new(sizeof(uint64_t));
- g_hash_table_insert(hotblocks, (gpointer) hash, (gpointer) cnt);
+ g_hash_table_insert(hotblocks, cnt, cnt);
}
=20
g_mutex_unlock(&lock);
--=20
2.39.5