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author | Alex Bennée <alex.bennee@linaro.org> | 2024-07-05 09:40:29 +0100 |
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committer | Alex Bennée <alex.bennee@linaro.org> | 2024-07-05 12:34:41 +0100 |
commit | ee3878bda1057e3e693ddbc5de657ccc6bcca2bd (patch) | |
tree | 173683d601f448f48a1490b89095ab7f39ba7969 /tests | |
parent | 03295660c854119646baa2e429aac9f2d1fb8a0f (diff) | |
download | qemu-ee3878bda1057e3e693ddbc5de657ccc6bcca2bd.zip qemu-ee3878bda1057e3e693ddbc5de657ccc6bcca2bd.tar.gz qemu-ee3878bda1057e3e693ddbc5de657ccc6bcca2bd.tar.bz2 |
test/plugins: preserve the instruction record over translations
We are interested in the particular instruction so we should use a
stable record for it. We could bring this down to physical address but
for now vaddr + disas seems to do the trick.
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240705084047.857176-23-alex.bennee@linaro.org>
Diffstat (limited to 'tests')
-rw-r--r-- | tests/plugin/insn.c | 76 |
1 files changed, 71 insertions, 5 deletions
diff --git a/tests/plugin/insn.c b/tests/plugin/insn.c index 524f9dd..baf2d07 100644 --- a/tests/plugin/insn.c +++ b/tests/plugin/insn.c @@ -43,6 +43,44 @@ typedef struct { char *disas; } Instruction; +/* A hash table to hold matched instructions */ +static GHashTable *match_insn_records; +static GMutex match_hash_lock; + + +static Instruction * get_insn_record(const char *disas, uint64_t vaddr, Match *m) +{ + g_autofree char *str_hash = g_strdup_printf("%"PRIx64" %s", vaddr, disas); + Instruction *record; + + g_mutex_lock(&match_hash_lock); + + if (!match_insn_records) { + match_insn_records = g_hash_table_new(g_str_hash, g_str_equal); + } + + record = g_hash_table_lookup(match_insn_records, str_hash); + + if (!record) { + g_autoptr(GString) ts = g_string_new(str_hash); + + record = g_new0(Instruction, 1); + record->disas = g_strdup(disas); + record->vaddr = vaddr; + record->match = m; + + g_hash_table_insert(match_insn_records, str_hash, record); + + g_string_prepend(ts, "Created record for: "); + g_string_append(ts, "\n"); + qemu_plugin_outs(ts->str); + } + + g_mutex_unlock(&match_hash_lock); + + return record; +} + /* * Initialise a new vcpu with reading the register list */ @@ -131,16 +169,19 @@ static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb) * If we are tracking certain instructions we will need more * information about the instruction which we also need to * save if there is a hit. + * + * We only want one record for each occurrence of the matched + * instruction. */ if (matches->len) { char *insn_disas = qemu_plugin_insn_disas(insn); for (int j = 0; j < matches->len; j++) { Match *m = &g_array_index(matches, Match, j); if (g_str_has_prefix(insn_disas, m->match_string)) { - Instruction *rec = g_new0(Instruction, 1); - rec->disas = g_strdup(insn_disas); - rec->vaddr = qemu_plugin_insn_vaddr(insn); - rec->match = m; + Instruction *rec = get_insn_record(insn_disas, + qemu_plugin_insn_vaddr(insn), + m); + qemu_plugin_register_vcpu_insn_exec_cb( insn, vcpu_insn_matched_exec_before, QEMU_PLUGIN_CB_NO_REGS, rec); @@ -173,13 +214,38 @@ static void plugin_exit(qemu_plugin_id_t id, void *p) qemu_plugin_u64_sum(insn_count)); } qemu_plugin_outs(out->str); - qemu_plugin_scoreboard_free(insn_count.score); + + g_mutex_lock(&match_hash_lock); + for (i = 0; i < matches->len; ++i) { Match *m = &g_array_index(matches, Match, i); + GHashTableIter iter; + Instruction *record; + qemu_plugin_u64 hit_e = qemu_plugin_scoreboard_u64_in_struct(m->counts, MatchCount, hits); + uint64_t hits = qemu_plugin_u64_sum(hit_e); + + g_string_printf(out, "Match: %s, hits %"PRId64"\n", m->match_string, hits); + qemu_plugin_outs(out->str); + + g_hash_table_iter_init(&iter, match_insn_records); + while (g_hash_table_iter_next(&iter, NULL, (void **)&record)) { + if (record->match == m) { + g_string_printf(out, + " %"PRIx64": %s (hits %"PRId64")\n", + record->vaddr, + record->disas, + record->hits); + qemu_plugin_outs(out->str); + } + } + g_free(m->match_string); qemu_plugin_scoreboard_free(m->counts); } + + g_mutex_unlock(&match_hash_lock); + g_array_free(matches, TRUE); g_array_free(sizes, TRUE); } |