From 92eecfff32763ee138f4cebc1a12c5b051ad5bb5 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Mon, 2 Nov 2020 06:58:41 -0500 Subject: [PATCH 1/2] trace: remove argument from trace_init_file It is not needed, all the callers are just saving what was retrieved from -trace and trace_init_file can retrieve it on its own. Signed-off-by: Paolo Bonzini Message-id: 20201102115841.4017692-1-pbonzini@redhat.com Signed-off-by: Stefan Hajnoczi --- bsd-user/main.c | 6 ++---- linux-user/main.c | 6 ++---- qemu-img.c | 6 ++---- qemu-io.c | 6 ++---- qemu-nbd.c | 6 ++---- scsi/qemu-pr-helper.c | 6 ++---- softmmu/vl.c | 6 ++---- storage-daemon/qemu-storage-daemon.c | 9 +++------ trace/control.c | 10 ++++------ trace/control.h | 12 +++--------- 10 files changed, 24 insertions(+), 49 deletions(-) diff --git a/bsd-user/main.c b/bsd-user/main.c index ac40d79bfa..0a918e8f74 100644 --- a/bsd-user/main.c +++ b/bsd-user/main.c @@ -745,7 +745,6 @@ int main(int argc, char **argv) const char *gdbstub = NULL; char **target_environ, **wrk; envlist_t *envlist = NULL; - char *trace_file = NULL; bsd_type = target_openbsd; if (argc <= 1) @@ -851,8 +850,7 @@ int main(int argc, char **argv) } else if (!strcmp(r, "strace")) { do_strace = 1; } else if (!strcmp(r, "trace")) { - g_free(trace_file); - trace_file = trace_opt_parse(optarg); + trace_opt_parse(optarg); } else { usage(); } @@ -880,7 +878,7 @@ int main(int argc, char **argv) if (!trace_init_backends()) { exit(1); } - trace_init_file(trace_file); + trace_init_file(); /* Zero out regs */ memset(regs, 0, sizeof(struct target_pt_regs)); diff --git a/linux-user/main.c b/linux-user/main.c index 75c9785157..24d1eb73ad 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -386,11 +386,9 @@ static void handle_arg_version(const char *arg) exit(EXIT_SUCCESS); } -static char *trace_file; static void handle_arg_trace(const char *arg) { - g_free(trace_file); - trace_file = trace_opt_parse(arg); + trace_opt_parse(arg); } #if defined(TARGET_XTENSA) @@ -672,7 +670,7 @@ int main(int argc, char **argv, char **envp) if (!trace_init_backends()) { exit(1); } - trace_init_file(trace_file); + trace_init_file(); if (qemu_plugin_load_list(&plugins)) { exit(1); } diff --git a/qemu-img.c b/qemu-img.c index c2c56fc797..8bdea40b58 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -5466,7 +5466,6 @@ int main(int argc, char **argv) const img_cmd_t *cmd; const char *cmdname; Error *local_error = NULL; - char *trace_file = NULL; int c; static const struct option long_options[] = { {"help", no_argument, 0, 'h'}, @@ -5516,8 +5515,7 @@ int main(int argc, char **argv) printf(QEMU_IMG_VERSION); return 0; case 'T': - g_free(trace_file); - trace_file = trace_opt_parse(optarg); + trace_opt_parse(optarg); break; } } @@ -5535,7 +5533,7 @@ int main(int argc, char **argv) if (!trace_init_backends()) { exit(1); } - trace_init_file(trace_file); + trace_init_file(); qemu_set_log(LOG_TRACE); /* find the command */ diff --git a/qemu-io.c b/qemu-io.c index 7cc832b3d6..ac88d8bd40 100644 --- a/qemu-io.c +++ b/qemu-io.c @@ -536,7 +536,6 @@ int main(int argc, char **argv) Error *local_error = NULL; QDict *opts = NULL; const char *format = NULL; - char *trace_file = NULL; bool force_share = false; #ifdef CONFIG_POSIX @@ -601,8 +600,7 @@ int main(int argc, char **argv) } break; case 'T': - g_free(trace_file); - trace_file = trace_opt_parse(optarg); + trace_opt_parse(optarg); break; case 'V': printf("%s version " QEMU_FULL_VERSION "\n" @@ -653,7 +651,7 @@ int main(int argc, char **argv) if (!trace_init_backends()) { exit(1); } - trace_init_file(trace_file); + trace_init_file(); qemu_set_log(LOG_TRACE); /* initialize commands */ diff --git a/qemu-nbd.c b/qemu-nbd.c index 75ced65030..a7075c5419 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -581,7 +581,6 @@ int main(int argc, char **argv) const char *tlscredsid = NULL; bool imageOpts = false; bool writethrough = true; - char *trace_file = NULL; bool fork_process = false; bool list = false; int old_stderr = -1; @@ -768,8 +767,7 @@ int main(int argc, char **argv) imageOpts = true; break; case 'T': - g_free(trace_file); - trace_file = trace_opt_parse(optarg); + trace_opt_parse(optarg); break; case QEMU_NBD_OPT_TLSAUTHZ: tlsauthz = optarg; @@ -816,7 +814,7 @@ int main(int argc, char **argv) if (!trace_init_backends()) { exit(1); } - trace_init_file(trace_file); + trace_init_file(); qemu_set_log(LOG_TRACE); socket_activation = check_socket_activation(); diff --git a/scsi/qemu-pr-helper.c b/scsi/qemu-pr-helper.c index d26faaf91e..2733d92f2d 100644 --- a/scsi/qemu-pr-helper.c +++ b/scsi/qemu-pr-helper.c @@ -884,7 +884,6 @@ int main(int argc, char **argv) int quiet = 0; int ch; Error *local_err = NULL; - char *trace_file = NULL; bool daemonize = false; bool pidfile_specified = false; bool socket_path_specified = false; @@ -968,8 +967,7 @@ int main(int argc, char **argv) ++loglevel; break; case 'T': - g_free(trace_file); - trace_file = trace_opt_parse(optarg); + trace_opt_parse(optarg); break; case 'V': version(argv[0]); @@ -992,7 +990,7 @@ int main(int argc, char **argv) if (!trace_init_backends()) { exit(EXIT_FAILURE); } - trace_init_file(trace_file); + trace_init_file(); qemu_set_log(LOG_TRACE); #ifdef CONFIG_MPATH diff --git a/softmmu/vl.c b/softmmu/vl.c index a71164494e..42e6d1057b 100644 --- a/softmmu/vl.c +++ b/softmmu/vl.c @@ -2886,7 +2886,6 @@ void qemu_init(int argc, char **argv, char **envp) int display_remote = 0; const char *log_mask = NULL; const char *log_file = NULL; - char *trace_file = NULL; ram_addr_t maxram_size; uint64_t ram_slots = 0; FILE *vmstate_dump_file = NULL; @@ -3688,8 +3687,7 @@ void qemu_init(int argc, char **argv, char **envp) xen_domid_restrict = true; break; case QEMU_OPTION_trace: - g_free(trace_file); - trace_file = trace_opt_parse(optarg); + trace_opt_parse(optarg); break; case QEMU_OPTION_plugin: qemu_plugin_opt_parse(optarg, &plugin_list); @@ -3939,7 +3937,7 @@ void qemu_init(int argc, char **argv, char **envp) if (!trace_init_backends()) { exit(1); } - trace_init_file(trace_file); + trace_init_file(); /* Open the logfile at this point and set the log mask if necessary. */ diff --git a/storage-daemon/qemu-storage-daemon.c b/storage-daemon/qemu-storage-daemon.c index e419ba9f19..7c914b0dc1 100644 --- a/storage-daemon/qemu-storage-daemon.c +++ b/storage-daemon/qemu-storage-daemon.c @@ -180,12 +180,9 @@ static void process_options(int argc, char *argv[]) help(); exit(EXIT_SUCCESS); case 'T': - { - char *trace_file = trace_opt_parse(optarg); - trace_init_file(trace_file); - g_free(trace_file); - break; - } + trace_opt_parse(optarg); + trace_init_file(); + break; case 'V': printf("qemu-storage-daemon version " QEMU_FULL_VERSION "\n" QEMU_COPYRIGHT "\n"); diff --git a/trace/control.c b/trace/control.c index 5669db7eea..b82fb87316 100644 --- a/trace/control.c +++ b/trace/control.c @@ -222,8 +222,10 @@ static void trace_init_events(const char *fname) loc_pop(&loc); } -void trace_init_file(const char *file) +void trace_init_file(void) { + QemuOpts *opts = qemu_find_opts_singleton("trace"); + const char *file = qemu_opt_get(opts, "file"); #ifdef CONFIG_TRACE_SIMPLE st_set_trace_file(file); if (init_trace_on_startup) { @@ -289,9 +291,8 @@ bool trace_init_backends(void) return true; } -char *trace_opt_parse(const char *optarg) +void trace_opt_parse(const char *optarg) { - char *trace_file; QemuOpts *opts = qemu_opts_parse_noisily(qemu_find_opts("trace"), optarg, true); if (!opts) { @@ -301,11 +302,8 @@ char *trace_opt_parse(const char *optarg) trace_enable_events(qemu_opt_get(opts, "enable")); } trace_init_events(qemu_opt_get(opts, "events")); - trace_file = g_strdup(qemu_opt_get(opts, "file")); init_trace_on_startup = true; qemu_opts_del(opts); - - return trace_file; } uint32_t trace_get_vcpu_event_count(void) diff --git a/trace/control.h b/trace/control.h index 1f81c491b6..05b95ea453 100644 --- a/trace/control.h +++ b/trace/control.h @@ -167,8 +167,6 @@ void trace_event_set_vcpu_state_dynamic(CPUState *vcpu, /** * trace_init_backends: - * @file: Name of trace output file; may be NULL. - * Corresponds to commandline option "--trace file=...". * * Initialize the tracing backend. * @@ -178,14 +176,12 @@ bool trace_init_backends(void); /** * trace_init_file: - * @file: Name of trace output file; may be NULL. - * Corresponds to commandline option "--trace file=...". * * Record the name of the output file for the tracing backend. * Exits if no selected backend does not support specifying the - * output file, and a non-NULL file was passed. + * output file, and a file was specified with "-trace file=...". */ -void trace_init_file(const char *file); +void trace_init_file(void); /** * trace_init_vcpu: @@ -229,10 +225,8 @@ extern QemuOptsList qemu_trace_opts; * @optarg: A string argument of --trace command line argument * * Initialize tracing subsystem. - * - * Returns the filename to save trace to. It must be freed with g_free(). */ -char *trace_opt_parse(const char *optarg); +void trace_opt_parse(const char *optarg); /** * trace_get_vcpu_event_count: From 35e28cb0f210cae3d9c98113d519fe5a4bef5866 Mon Sep 17 00:00:00 2001 From: Stefan Hajnoczi Date: Tue, 20 Oct 2020 10:40:43 +0100 Subject: [PATCH 2/2] scripts/tracetool: silence SystemTap dtrace(1) long long warnings MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit SystemTap's dtrace(1) prints the following warning when it encounters long long arguments: Warning: /usr/bin/dtrace:trace/trace-dtrace-hw_virtio.dtrace:76: syntax error near: probe vhost_vdpa_dev_start Warning: Proceeding as if --no-pyparsing was given. Use the uint64_t and int64_t types, respectively. This works with all host CPU 32- and 64-bit data models (ILP32, LP64, and LLP64) that QEMU supports. Reported-by: Markus Armbruster Signed-off-by: Stefan Hajnoczi Reviewed-by: Daniel P. Berrangé Reviewed-by: Philippe Mathieu-Daudé Message-id: 20201020094043.159935-1-stefanha@redhat.com Suggested-by: Daniel P. Berrangé Signed-off-by: Stefan Hajnoczi --- scripts/tracetool/format/d.py | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/scripts/tracetool/format/d.py b/scripts/tracetool/format/d.py index 353722f89c..ebfb714200 100644 --- a/scripts/tracetool/format/d.py +++ b/scripts/tracetool/format/d.py @@ -57,6 +57,12 @@ def generate(events, backend, group): # Avoid it by changing probe type to signed char * beforehand. if type_ == 'int8_t *': type_ = 'signed char *' + + # SystemTap dtrace(1) emits a warning when long long is used + type_ = type_.replace('unsigned long long', 'uint64_t') + type_ = type_.replace('signed long long', 'int64_t') + type_ = type_.replace('long long', 'int64_t') + if name in RESERVED_WORDS: name += '_' args.append(type_ + ' ' + name)