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Sat, 06 Jul 2024 12:13:50 -0700 (PDT) From: Pierrick Bouvier To: qemu-devel@nongnu.org Cc: Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Richard Henderson , Marcel Apfelbaum , Mahmoud Mandour , Alexandre Iooss , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Eduardo Habkost , Yanan Wang , Pierrick Bouvier , Xingtao Yao Subject: [PATCH v6 6/7] tests/plugin/mem: add option to print memory accesses Date: Sat, 6 Jul 2024 12:13:34 -0700 Message-Id: <20240706191335.878142-7-pierrick.bouvier@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240706191335.878142-1-pierrick.bouvier@linaro.org> References: <20240706191335.878142-1-pierrick.bouvier@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::42a; envelope-from=pierrick.bouvier@linaro.org; helo=mail-pf1-x42a.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1720293319166100001 Content-Type: text/plain; charset="utf-8" By using "print-accesses=3Dtrue" option, mem plugin will now print every value accessed, with associated size, type (store vs load), symbol, instruction address and phys/virt address accessed. Reviewed-by: Richard Henderson Reviewed-by: Xingtao Yao Signed-off-by: Pierrick Bouvier --- tests/plugin/mem.c | 69 +++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 68 insertions(+), 1 deletion(-) diff --git a/tests/plugin/mem.c b/tests/plugin/mem.c index b650dddcce1..086e6f5bdfc 100644 --- a/tests/plugin/mem.c +++ b/tests/plugin/mem.c @@ -21,10 +21,15 @@ typedef struct { uint64_t io_count; } CPUCount; =20 +typedef struct { + uint64_t vaddr; + const char *sym; +} InsnInfo; + static struct qemu_plugin_scoreboard *counts; static qemu_plugin_u64 mem_count; static qemu_plugin_u64 io_count; -static bool do_inline, do_callback; +static bool do_inline, do_callback, do_print_accesses; static bool do_haddr; static enum qemu_plugin_mem_rw rw =3D QEMU_PLUGIN_MEM_RW; =20 @@ -60,6 +65,44 @@ static void vcpu_mem(unsigned int cpu_index, qemu_plugin= _meminfo_t meminfo, } } =20 +static void print_access(unsigned int cpu_index, qemu_plugin_meminfo_t mem= info, + uint64_t vaddr, void *udata) +{ + InsnInfo *insn_info =3D udata; + unsigned size =3D 8 << qemu_plugin_mem_size_shift(meminfo); + const char *type =3D qemu_plugin_mem_is_store(meminfo) ? "store" : "lo= ad"; + qemu_plugin_mem_value value =3D qemu_plugin_mem_get_value(meminfo); + uint64_t hwaddr =3D + qemu_plugin_hwaddr_phys_addr(qemu_plugin_get_hwaddr(meminfo, vaddr= )); + g_autoptr(GString) out =3D g_string_new(""); + g_string_printf(out, + "0x%"PRIx64",%s,0x%"PRIx64",0x%"PRIx64",%d,%s,", + insn_info->vaddr, insn_info->sym, + vaddr, hwaddr, size, type); + switch (value.type) { + case QEMU_PLUGIN_MEM_VALUE_U8: + g_string_append_printf(out, "0x%02"PRIx8, value.data.u8); + break; + case QEMU_PLUGIN_MEM_VALUE_U16: + g_string_append_printf(out, "0x%04"PRIx16, value.data.u16); + break; + case QEMU_PLUGIN_MEM_VALUE_U32: + g_string_append_printf(out, "0x%08"PRIx32, value.data.u32); + break; + case QEMU_PLUGIN_MEM_VALUE_U64: + g_string_append_printf(out, "0x%016"PRIx64, value.data.u64); + break; + case QEMU_PLUGIN_MEM_VALUE_U128: + g_string_append_printf(out, "0x%016"PRIx64"%016"PRIx64, + value.data.u128.high, value.data.u128.low); + break; + default: + g_assert_not_reached(); + } + g_string_append_printf(out, "\n"); + qemu_plugin_outs(out->str); +} + static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb) { size_t n =3D qemu_plugin_tb_n_insns(tb); @@ -79,6 +122,16 @@ static void vcpu_tb_trans(qemu_plugin_id_t id, struct q= emu_plugin_tb *tb) QEMU_PLUGIN_CB_NO_REGS, rw, NULL); } + if (do_print_accesses) { + /* we leak this pointer, to avoid locking to keep track of it = */ + InsnInfo *insn_info =3D g_malloc(sizeof(InsnInfo)); + const char *sym =3D qemu_plugin_insn_symbol(insn); + insn_info->sym =3D sym ? sym : ""; + insn_info->vaddr =3D qemu_plugin_insn_vaddr(insn); + qemu_plugin_register_vcpu_mem_cb(insn, print_access, + QEMU_PLUGIN_CB_NO_REGS, + rw, (void *) insn_info); + } } } =20 @@ -117,6 +170,12 @@ QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin= _id_t id, fprintf(stderr, "boolean argument parsing failed: %s\n", o= pt); return -1; } + } else if (g_strcmp0(tokens[0], "print-accesses") =3D=3D 0) { + if (!qemu_plugin_bool_parse(tokens[0], tokens[1], + &do_print_accesses)) { + fprintf(stderr, "boolean argument parsing failed: %s\n", o= pt); + return -1; + } } else { fprintf(stderr, "option parsing failed: %s\n", opt); return -1; @@ -129,6 +188,14 @@ QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin= _id_t id, return -1; } =20 + if (do_print_accesses) { + g_autoptr(GString) out =3D g_string_new(""); + g_string_printf(out, + "insn_vaddr,insn_symbol,mem_vaddr,mem_hwaddr," + "access_size,access_type,mem_value\n"); + qemu_plugin_outs(out->str); + } + counts =3D qemu_plugin_scoreboard_new(sizeof(CPUCount)); mem_count =3D qemu_plugin_scoreboard_u64_in_struct( counts, CPUCount, mem_count); --=20 2.39.2