[PATCH 5/5] tests/plugin/inline: add test for condition callback

[Pierrick Bouvier <pierrick.bouvier@linaro.org>]

Count number of tb and insn executed using a conditional callback. We
ensure the callback has been called expected number of time (per vcpu).

Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
 tests/plugin/inline.c | 87 +++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 84 insertions(+), 3 deletions(-)

diff --git a/tests/plugin/inline.c b/tests/plugin/inline.c
index 30acc7a1838..8720ecc358a 100644
--- a/tests/plugin/inline.c
+++ b/tests/plugin/inline.c
@@ -20,8 +20,14 @@ typedef struct {
     uint64_t count_insn_inline;
     uint64_t count_mem;
     uint64_t count_mem_inline;
+    uint64_t tb_cond_num_trigger;
+    uint64_t tb_cond_track_count;
+    uint64_t insn_cond_num_trigger;
+    uint64_t insn_cond_track_count;
 } CPUCount;
 
+static const uint64_t cond_trigger_limit = 100;
+
 typedef struct {
     uint64_t data_insn;
     uint64_t data_tb;
@@ -35,6 +41,10 @@ static qemu_plugin_u64 count_insn;
 static qemu_plugin_u64 count_insn_inline;
 static qemu_plugin_u64 count_mem;
 static qemu_plugin_u64 count_mem_inline;
+static qemu_plugin_u64 tb_cond_num_trigger;
+static qemu_plugin_u64 tb_cond_track_count;
+static qemu_plugin_u64 insn_cond_num_trigger;
+static qemu_plugin_u64 insn_cond_track_count;
 static struct qemu_plugin_scoreboard *data;
 static qemu_plugin_u64 data_insn;
 static qemu_plugin_u64 data_tb;
@@ -56,12 +66,19 @@ static void stats_insn(void)
     const uint64_t per_vcpu = qemu_plugin_u64_sum(count_insn);
     const uint64_t inl_per_vcpu =
         qemu_plugin_u64_sum(count_insn_inline);
+    const uint64_t cond_num_trigger =
+        qemu_plugin_u64_sum(insn_cond_num_trigger);
+    const uint64_t cond_track_left = qemu_plugin_u64_sum(insn_cond_track_count);
+    const uint64_t conditional =
+        cond_num_trigger * cond_trigger_limit + cond_track_left;
     printf("insn: %" PRIu64 "\n", expected);
     printf("insn: %" PRIu64 " (per vcpu)\n", per_vcpu);
     printf("insn: %" PRIu64 " (per vcpu inline)\n", inl_per_vcpu);
+    printf("insn: %" PRIu64 " (cond cb)\n", conditional);
     g_assert(expected > 0);
     g_assert(per_vcpu == expected);
     g_assert(inl_per_vcpu == expected);
+    g_assert(conditional == expected);
 }
 
 static void stats_tb(void)
@@ -70,12 +87,18 @@ static void stats_tb(void)
     const uint64_t per_vcpu = qemu_plugin_u64_sum(count_tb);
     const uint64_t inl_per_vcpu =
         qemu_plugin_u64_sum(count_tb_inline);
+    const uint64_t cond_num_trigger = qemu_plugin_u64_sum(tb_cond_num_trigger);
+    const uint64_t cond_track_left = qemu_plugin_u64_sum(tb_cond_track_count);
+    const uint64_t conditional =
+        cond_num_trigger * cond_trigger_limit + cond_track_left;
     printf("tb: %" PRIu64 "\n", expected);
     printf("tb: %" PRIu64 " (per vcpu)\n", per_vcpu);
     printf("tb: %" PRIu64 " (per vcpu inline)\n", inl_per_vcpu);
+    printf("tb: %" PRIu64 " (conditional cb)\n", conditional);
     g_assert(expected > 0);
     g_assert(per_vcpu == expected);
     g_assert(inl_per_vcpu == expected);
+    g_assert(conditional == expected);
 }
 
 static void stats_mem(void)
@@ -104,14 +127,35 @@ static void plugin_exit(qemu_plugin_id_t id, void *udata)
         const uint64_t insn_inline = qemu_plugin_u64_get(count_insn_inline, i);
         const uint64_t mem = qemu_plugin_u64_get(count_mem, i);
         const uint64_t mem_inline = qemu_plugin_u64_get(count_mem_inline, i);
-        printf("cpu %d: tb (%" PRIu64 ", %" PRIu64 ") | "
-               "insn (%" PRIu64 ", %" PRIu64 ") | "
+        const uint64_t tb_cond_trigger =
+            qemu_plugin_u64_get(tb_cond_num_trigger, i);
+        const uint64_t tb_cond_left =
+            qemu_plugin_u64_get(tb_cond_track_count, i);
+        const uint64_t insn_cond_trigger =
+            qemu_plugin_u64_get(insn_cond_num_trigger, i);
+        const uint64_t insn_cond_left =
+            qemu_plugin_u64_get(insn_cond_track_count, i);
+        printf("cpu %d: tb (%" PRIu64 ", %" PRIu64
+               ", %" PRIu64 " * %" PRIu64 " + %" PRIu64
+               ") | "
+               "insn (%" PRIu64 ", %" PRIu64
+               ", %" PRIu64 " * %" PRIu64 " + %" PRIu64
+               ") | "
                "mem (%" PRIu64 ", %" PRIu64 ")"
                "\n",
-               i, tb, tb_inline, insn, insn_inline, mem, mem_inline);
+               i,
+               tb, tb_inline,
+               tb_cond_trigger, cond_trigger_limit, tb_cond_left,
+               insn, insn_inline,
+               insn_cond_trigger, cond_trigger_limit, insn_cond_left,
+               mem, mem_inline);
         g_assert(tb == tb_inline);
         g_assert(insn == insn_inline);
         g_assert(mem == mem_inline);
+        g_assert(tb_cond_trigger == tb / cond_trigger_limit);
+        g_assert(tb_cond_left == tb % cond_trigger_limit);
+        g_assert(insn_cond_trigger == insn / cond_trigger_limit);
+        g_assert(insn_cond_left == insn % cond_trigger_limit);
     }
 
     stats_tb();
@@ -132,6 +176,22 @@ static void vcpu_tb_exec(unsigned int cpu_index, void *udata)
     g_mutex_unlock(&tb_lock);
 }
 
+static void vcpu_tb_cond_exec(unsigned int cpu_index, void *udata)
+{
+    g_assert(qemu_plugin_u64_get(tb_cond_track_count, cpu_index) ==
+             cond_trigger_limit);
+    qemu_plugin_u64_set(tb_cond_track_count, cpu_index, 0);
+    qemu_plugin_u64_add(tb_cond_num_trigger, cpu_index, 1);
+}
+
+static void vcpu_insn_cond_exec(unsigned int cpu_index, void *udata)
+{
+    g_assert(qemu_plugin_u64_get(insn_cond_track_count, cpu_index) ==
+             cond_trigger_limit);
+    qemu_plugin_u64_set(insn_cond_track_count, cpu_index, 0);
+    qemu_plugin_u64_add(insn_cond_num_trigger, cpu_index, 1);
+}
+
 static void vcpu_insn_exec(unsigned int cpu_index, void *udata)
 {
     qemu_plugin_u64_add(count_insn, cpu_index, 1);
@@ -163,6 +223,12 @@ static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
     qemu_plugin_register_vcpu_tb_exec_inline_per_vcpu(
         tb, QEMU_PLUGIN_INLINE_STORE_U64, data_tb, (uintptr_t) tb_store);
 
+    qemu_plugin_register_vcpu_tb_exec_inline_per_vcpu(
+        tb, QEMU_PLUGIN_INLINE_ADD_U64, tb_cond_track_count, 1);
+    qemu_plugin_register_vcpu_tb_exec_cond_cb(
+        tb, vcpu_tb_cond_exec, QEMU_PLUGIN_CB_NO_REGS,
+        QEMU_PLUGIN_COND_EQ, tb_cond_track_count, cond_trigger_limit, NULL);
+
     for (int idx = 0; idx < qemu_plugin_tb_n_insns(tb); ++idx) {
         struct qemu_plugin_insn *insn = qemu_plugin_tb_get_insn(tb, idx);
         void *insn_store = insn;
@@ -176,6 +242,13 @@ static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
         qemu_plugin_register_vcpu_insn_exec_inline_per_vcpu(
             insn, QEMU_PLUGIN_INLINE_ADD_U64, count_insn_inline, 1);
 
+        qemu_plugin_register_vcpu_insn_exec_inline_per_vcpu(
+            insn, QEMU_PLUGIN_INLINE_ADD_U64, insn_cond_track_count, 1);
+        qemu_plugin_register_vcpu_insn_exec_cond_cb(
+            insn, vcpu_insn_cond_exec, QEMU_PLUGIN_CB_NO_REGS,
+            QEMU_PLUGIN_COND_EQ, insn_cond_track_count, cond_trigger_limit,
+            NULL);
+
         qemu_plugin_register_vcpu_mem_cb(insn, &vcpu_mem_access,
                                          QEMU_PLUGIN_CB_NO_REGS,
                                          QEMU_PLUGIN_MEM_RW, mem_store);
@@ -207,6 +280,14 @@ int qemu_plugin_install(qemu_plugin_id_t id, const qemu_info_t *info,
         counts, CPUCount, count_insn_inline);
     count_mem_inline = qemu_plugin_scoreboard_u64_in_struct(
         counts, CPUCount, count_mem_inline);
+    tb_cond_num_trigger = qemu_plugin_scoreboard_u64_in_struct(
+        counts, CPUCount, tb_cond_num_trigger);
+    tb_cond_track_count = qemu_plugin_scoreboard_u64_in_struct(
+        counts, CPUCount, tb_cond_track_count);
+    insn_cond_num_trigger = qemu_plugin_scoreboard_u64_in_struct(
+        counts, CPUCount, insn_cond_num_trigger);
+    insn_cond_track_count = qemu_plugin_scoreboard_u64_in_struct(
+        counts, CPUCount, insn_cond_track_count);
     data = qemu_plugin_scoreboard_new(sizeof(CPUData));
     data_insn = qemu_plugin_scoreboard_u64_in_struct(data, CPUData, data_insn);
     data_tb = qemu_plugin_scoreboard_u64_in_struct(data, CPUData, data_tb);
-- 
2.43.0