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Merge remote-tracking branch 'remotes/stefanha/tags/tracing-pull-request' into staging

# gpg: Signature made Tue 28 Jun 2016 22:27:20 BST
# gpg:                using RSA key 0x9CA4ABB381AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>"
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35  775A 9CA4 ABB3 81AB 73C8

* remotes/stefanha/tags/tracing-pull-request:
  trace: [*-user] Add events to trace guest syscalls in syscall emulation mode
  trace: enable tracing in qemu-img
  qemu-img: move common options parsing before commands processing
  trace: enable tracing in qemu-nbd
  trace: enable tracing in qemu-io
  trace: move qemu_trace_opts to trace/control.c
  doc: move text describing --trace to specific .texi file
  doc: sync help description for --trace with man for qemu.1

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2016-06-29 14:07:57 +01:00
parent 3e904d6ade 9c15e70086
commit 845d1e7e42
14 changed files with 206 additions and 98 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
Makefile
View File

@ -564,8 +564,9 @@ qemu.1: qemu-doc.texi qemu-options.texi qemu-monitor.texi qemu-monitor-info.texi
perl -Ww -- $(SRC_PATH)/scripts/texi2pod.pl $< qemu.pod && \
$(POD2MAN) --section=1 --center=" " --release=" " qemu.pod > $@, \
" GEN $@")
qemu.1: qemu-option-trace.texi
qemu-img.1: qemu-img.texi qemu-img-cmds.texi
qemu-img.1: qemu-img.texi qemu-option-trace.texi qemu-img-cmds.texi
$(call quiet-command, \
perl -Ww -- $(SRC_PATH)/scripts/texi2pod.pl $< qemu-img.pod && \
$(POD2MAN) --section=1 --center=" " --release=" " qemu-img.pod > $@, \
@ -577,7 +578,7 @@ fsdev/virtfs-proxy-helper.1: fsdev/virtfs-proxy-helper.texi
$(POD2MAN) --section=1 --center=" " --release=" " fsdev/virtfs-proxy-helper.pod > $@, \
" GEN $@")
qemu-nbd.8: qemu-nbd.texi
qemu-nbd.8: qemu-nbd.texi qemu-option-trace.texi
$(call quiet-command, \
perl -Ww -- $(SRC_PATH)/scripts/texi2pod.pl $< qemu-nbd.pod && \
$(POD2MAN) --section=8 --center=" " --release=" " qemu-nbd.pod > $@, \
@ -595,7 +596,7 @@ info: qemu-doc.info qemu-tech.info
pdf: qemu-doc.pdf qemu-tech.pdf
qemu-doc.dvi qemu-doc.html qemu-doc.info qemu-doc.pdf: \
qemu-img.texi qemu-nbd.texi qemu-options.texi \
qemu-img.texi qemu-nbd.texi qemu-options.texi qemu-option-trace.texi \
qemu-monitor.texi qemu-img-cmds.texi qemu-ga.texi \
qemu-monitor-info.texi

9
bsd-user/syscall.c
View File

@ -315,12 +315,14 @@ abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
abi_long arg5, abi_long arg6, abi_long arg7,
abi_long arg8)
{
CPUState *cpu = ENV_GET_CPU(cpu_env);
abi_long ret;
void *p;
#ifdef DEBUG
gemu_log("freebsd syscall %d\n", num);
#endif
trace_guest_user_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);
if(do_strace)
print_freebsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
@ -400,6 +402,7 @@ abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
#endif
if (do_strace)
print_freebsd_syscall_ret(num, ret);
trace_guest_user_syscall_ret(cpu, num, ret);
return ret;
efault:
ret = -TARGET_EFAULT;
@ -410,12 +413,14 @@ abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1,
abi_long arg2, abi_long arg3, abi_long arg4,
abi_long arg5, abi_long arg6)
{
CPUState *cpu = ENV_GET_CPU(cpu_env);
abi_long ret;
void *p;
#ifdef DEBUG
gemu_log("netbsd syscall %d\n", num);
#endif
trace_guest_user_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, 0, 0);
if(do_strace)
print_netbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
@ -472,6 +477,7 @@ abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1,
#endif
if (do_strace)
print_netbsd_syscall_ret(num, ret);
trace_guest_user_syscall_ret(cpu, num, ret);
return ret;
efault:
ret = -TARGET_EFAULT;
@ -482,12 +488,14 @@ abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
abi_long arg2, abi_long arg3, abi_long arg4,
abi_long arg5, abi_long arg6)
{
CPUState *cpu = ENV_GET_CPU(cpu_env);
abi_long ret;
void *p;
#ifdef DEBUG
gemu_log("openbsd syscall %d\n", num);
#endif
trace_guest_user_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, 0, 0);
if(do_strace)
print_openbsd_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
@ -544,6 +552,7 @@ abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
#endif
if (do_strace)
print_openbsd_syscall_ret(num, ret);
trace_guest_user_syscall_ret(cpu, num, ret);
return ret;
efault:
ret = -TARGET_EFAULT;

2
linux-user/syscall.c
View File

@ -6802,6 +6802,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
#ifdef DEBUG
gemu_log("syscall %d", num);
#endif
trace_guest_user_syscall(cpu, num, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);
if(do_strace)
print_syscall(num, arg1, arg2, arg3, arg4, arg5, arg6);
@ -11245,6 +11246,7 @@ fail:
#endif
if(do_strace)
print_syscall_ret(num, ret);
trace_guest_user_syscall_ret(cpu, num, ret);
return ret;
efault:
ret = -TARGET_EFAULT;

58
qemu-img.c
View File

@ -32,6 +32,7 @@
#include "qemu/config-file.h"
#include "qemu/option.h"
#include "qemu/error-report.h"
#include "qemu/log.h"
#include "qom/object_interfaces.h"
#include "sysemu/sysemu.h"
#include "sysemu/block-backend.h"
@ -39,6 +40,7 @@
#include "block/blockjob.h"
#include "block/qapi.h"
#include "crypto/init.h"
#include "trace/control.h"
#include <getopt.h>
#define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION QEMU_PKGVERSION \
@ -91,9 +93,14 @@ static void QEMU_NORETURN help(void)
{
const char *help_msg =
QEMU_IMG_VERSION
"usage: qemu-img command [command options]\n"
"usage: qemu-img [standard options] command [command options]\n"
"QEMU disk image utility\n"
"\n"
" '-h', '--help' display this help and exit\n"
" '-V', '--version' output version information and exit\n"
" '-T', '--trace' [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
" specify tracing options\n"
"\n"
"Command syntax:\n"
#define DEF(option, callback, arg_string) \
" " arg_string "\n"
@ -3803,10 +3810,12 @@ 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'},
{"version", no_argument, 0, 'v'},
{"version", no_argument, 0, 'V'},
{"trace", required_argument, NULL, 'T'},
{0, 0, 0, 0}
};
@ -3829,28 +3838,49 @@ int main(int argc, char **argv)
if (argc < 2) {
error_exit("Not enough arguments");
}
cmdname = argv[1];
qemu_add_opts(&qemu_object_opts);
qemu_add_opts(&qemu_source_opts);
qemu_add_opts(&qemu_trace_opts);
while ((c = getopt_long(argc, argv, "+hVT:", long_options, NULL)) != -1) {
switch (c) {
case 'h':
help();
return 0;
case 'V':
printf(QEMU_IMG_VERSION);
return 0;
case 'T':
g_free(trace_file);
trace_file = trace_opt_parse(optarg);
break;
}
}
cmdname = argv[optind];
/* reset getopt_long scanning */
argc -= optind;
if (argc < 1) {
return 0;
}
argv += optind;
optind = 1;
if (!trace_init_backends()) {
exit(1);
}
trace_init_file(trace_file);
qemu_set_log(LOG_TRACE);
/* find the command */
for (cmd = img_cmds; cmd->name != NULL; cmd++) {
if (!strcmp(cmdname, cmd->name)) {
return cmd->handler(argc - 1, argv + 1);
return cmd->handler(argc, argv);
}
}
c = getopt_long(argc, argv, "h", long_options, NULL);
if (c == 'h') {
help();
}
if (c == 'v') {
printf(QEMU_IMG_VERSION);
return 0;
}
/* not found */
error_exit("Command not found: %s", cmdname);
}

13
qemu-img.texi
View File

@ -1,6 +1,6 @@
@example
@c man begin SYNOPSIS
@command{qemu-img} @var{command} [@var{command} @var{options}]
@command{qemu-img} [@var{standard} @var{options}] @var{command} [@var{command} @var{options}]
@c man end
@end example
@ -16,6 +16,17 @@ inconsistent state.
@c man begin OPTIONS
Standard options:
@table @option
@item -h, --help
Display this help and exit
@item -V, --version
Display version information and exit
@item -T, --trace [[enable=]@var{pattern}][,events=@var{file}][,file=@var{file}]
@findex --trace
@include qemu-option-trace.texi
@end table
The following commands are supported:
@include qemu-img-cmds.texi

18
qemu-io.c
View File

@ -18,6 +18,7 @@
#include "qemu/option.h"
#include "qemu/config-file.h"
#include "qemu/readline.h"
#include "qemu/log.h"
#include "qapi/qmp/qstring.h"
#include "qom/object_interfaces.h"
#include "sysemu/block-backend.h"
@ -253,7 +254,9 @@ static void usage(const char *name)
" -k, --native-aio use kernel AIO implementation (on Linux only)\n"
" -t, --cache=MODE use the given cache mode for the image\n"
" -d, --discard=MODE use the given discard mode for the image\n"
" -T, --trace FILE enable trace events listed in the given file\n"
" -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
" specify tracing options\n"
" see qemu-img(1) man page for full description\n"
" -h, --help display this help and exit\n"
" -V, --version output version information and exit\n"
"\n"
@ -458,6 +461,7 @@ int main(int argc, char **argv)
Error *local_error = NULL;
QDict *opts = NULL;
const char *format = NULL;
char *trace_file = NULL;
#ifdef CONFIG_POSIX
signal(SIGPIPE, SIG_IGN);
@ -470,6 +474,7 @@ int main(int argc, char **argv)
module_call_init(MODULE_INIT_QOM);
qemu_add_opts(&qemu_object_opts);
qemu_add_opts(&qemu_trace_opts);
bdrv_init();
while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
@ -509,9 +514,8 @@ int main(int argc, char **argv)
}
break;
case 'T':
if (!trace_init_backends()) {
exit(1); /* error message will have been printed */
}
g_free(trace_file);
trace_file = trace_opt_parse(optarg);
break;
case 'V':
printf("%s version %s\n", progname, QEMU_VERSION);
@ -557,6 +561,12 @@ int main(int argc, char **argv)
exit(1);
}
if (!trace_init_backends()) {
exit(1);
}
trace_init_file(trace_file);
qemu_set_log(LOG_TRACE);
/* initialize commands */
qemuio_add_command(&quit_cmd);
qemuio_add_command(&open_cmd);

19
qemu-nbd.c
View File

@ -27,12 +27,14 @@
#include "qemu/error-report.h"
#include "qemu/config-file.h"
#include "qemu/bswap.h"
#include "qemu/log.h"
#include "block/snapshot.h"
#include "qapi/util.h"
#include "qapi/qmp/qstring.h"
#include "qom/object_interfaces.h"
#include "io/channel-socket.h"
#include "crypto/init.h"
#include "trace/control.h"
#include <getopt.h>
#include <libgen.h>
@ -88,6 +90,8 @@ static void usage(const char *name)
"General purpose options:\n"
" --object type,id=ID,... define an object such as 'secret' for providing\n"
" passwords and/or encryption keys\n"
" -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
" specify tracing options\n"
#ifdef __linux__
"Kernel NBD client support:\n"
" -c, --connect=DEV connect FILE to the local NBD device DEV\n"
@ -470,7 +474,7 @@ int main(int argc, char **argv)
off_t fd_size;
QemuOpts *sn_opts = NULL;
const char *sn_id_or_name = NULL;
const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:";
const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:T:";
struct option lopt[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'V' },
@ -498,6 +502,7 @@ int main(int argc, char **argv)
{ "export-name", required_argument, NULL, 'x' },
{ "tls-creds", required_argument, NULL, QEMU_NBD_OPT_TLSCREDS },
{ "image-opts", no_argument, NULL, QEMU_NBD_OPT_IMAGE_OPTS },
{ "trace", required_argument, NULL, 'T' },
{ NULL, 0, NULL, 0 }
};
int ch;
@ -518,6 +523,7 @@ int main(int argc, char **argv)
const char *tlscredsid = NULL;
bool imageOpts = false;
bool writethrough = true;
char *trace_file = NULL;
/* The client thread uses SIGTERM to interrupt the server. A signal
* handler ensures that "qemu-nbd -v -c" exits with a nice status code.
@ -531,6 +537,7 @@ int main(int argc, char **argv)
module_call_init(MODULE_INIT_QOM);
qemu_add_opts(&qemu_object_opts);
qemu_add_opts(&qemu_trace_opts);
qemu_init_exec_dir(argv[0]);
while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) {
@ -703,6 +710,10 @@ int main(int argc, char **argv)
case QEMU_NBD_OPT_IMAGE_OPTS:
imageOpts = true;
break;
case 'T':
g_free(trace_file);
trace_file = trace_opt_parse(optarg);
break;
}
}
@ -718,6 +729,12 @@ int main(int argc, char **argv)
exit(EXIT_FAILURE);
}
if (!trace_init_backends()) {
exit(1);
}
trace_init_file(trace_file);
qemu_set_log(LOG_TRACE);
if (tlscredsid) {
if (sockpath) {
error_report("TLS is only supported with IPv4/IPv6");

3
qemu-nbd.texi
View File

@ -92,6 +92,9 @@ Display extra debugging information
Display this help and exit
@item -V, --version
Display version information and exit
@item -T, --trace [[enable=]@var{pattern}][,events=@var{file}][,file=@var{file}]
@findex --trace
@include qemu-option-trace.texi
@end table
@c man end

25
qemu-option-trace.texi Normal file
View File

@ -0,0 +1,25 @@
Specify tracing options.
@table @option
@item [enable=]@var{pattern}
Immediately enable events matching @var{pattern}.
The file must contain one event name (as listed in the @file{trace-events-all}
file) per line; globbing patterns are accepted too. This option is only
available if QEMU has been compiled with the @var{simple}, @var{stderr}
or @var{ftrace} tracing backend. To specify multiple events or patterns,
specify the @option{-trace} option multiple times.
Use @code{-trace help} to print a list of names of trace points.
@item events=@var{file}
Immediately enable events listed in @var{file}.
The file must contain one event name (as listed in the @file{trace-events-all}
file) per line; globbing patterns are accepted too. This option is only
available if QEMU has been compiled with the @var{simple}, @var{stderr} or
@var{ftrace} tracing backend.
@item file=@var{file}
Log output traces to @var{file}.
This option is only available if QEMU has been compiled with
the @var{simple} tracing backend.
@end table

29
qemu-options.hx
View File

@ -3669,34 +3669,9 @@ DEF("trace", HAS_ARG, QEMU_OPTION_trace,
STEXI
HXCOMM This line is not accurate, as some sub-options are backend-specific but
HXCOMM HX does not support conditional compilation of text.
@item -trace [events=@var{file}][,file=@var{file}]
@item -trace [[enable=]@var{pattern}][,events=@var{file}][,file=@var{file}]
@findex -trace
Specify tracing options.
@table @option
@item [enable=]@var{pattern}
Immediately enable events matching @var{pattern}.
The file must contain one event name (as listed in the @file{trace-events-all}
file) per line; globbing patterns are accepted too. This option is only
available if QEMU has been compiled with the @var{simple}, @var{stderr}
or @var{ftrace} tracing backend. To specify multiple events or patterns,
specify the @option{-trace} option multiple times.
Use @code{-trace help} to print a list of names of trace points.
@item events=@var{file}
Immediately enable events listed in @var{file}.
The file must contain one event name (as listed in the @file{trace-events-all}
file) per line; globbing patterns are accepted too. This option is only
available if QEMU has been compiled with the @var{simple}, @var{stderr} or
@var{ftrace} tracing backend.
@item file=@var{file}
Log output traces to @var{file}.
This option is only available if QEMU has been compiled with
the @var{simple} tracing backend.
@end table
@include qemu-option-trace.texi
ETEXI
HXCOMM Internal use

16
trace-events
View File

@ -156,3 +156,19 @@ memory_region_tb_write(int cpu_index, uint64_t addr, uint64_t value, unsigned si
#
# Targets: TCG(all)
disable vcpu tcg guest_mem_before(TCGv vaddr, uint8_t info) "info=%d", "vaddr=0x%016"PRIx64" info=%d"
# @num: System call number.
# @arg*: System call argument value.
#
# Start executing a guest system call in syscall emulation mode.
#
# Targets: TCG(all)
disable vcpu guest_user_syscall(uint64_t num, uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5, uint64_t arg6, uint64_t arg7, uint64_t arg8) "num=0x%016"PRIx64" arg1=0x%016"PRIx64" arg2=0x%016"PRIx64" arg3=0x%016"PRIx64" arg4=0x%016"PRIx64" arg5=0x%016"PRIx64" arg6=0x%016"PRIx64" arg7=0x%016"PRIx64" arg8=0x%016"PRIx64
# @num: System call number.
# @ret: System call result value.
#
# Finish executing a guest system call in syscall emulation mode.
#
# Targets: TCG(all)
disable vcpu guest_user_syscall_ret(uint64_t num, uint64_t ret) "num=0x%016"PRIx64" ret=0x%016"PRIx64

42
trace/control.c
View File

@ -21,11 +21,33 @@
#endif
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "qemu/config-file.h"
#include "monitor/monitor.h"
int trace_events_enabled_count;
bool trace_events_dstate[TRACE_EVENT_COUNT];
QemuOptsList qemu_trace_opts = {
.name = "trace",
.implied_opt_name = "enable",
.head = QTAILQ_HEAD_INITIALIZER(qemu_trace_opts.head),
.desc = {
{
.name = "enable",
.type = QEMU_OPT_STRING,
},
{
.name = "events",
.type = QEMU_OPT_STRING,
},{
.name = "file",
.type = QEMU_OPT_STRING,
},
{ /* end of list */ }
},
};
TraceEvent *trace_event_name(const char *name)
{
assert(name != NULL);
@ -142,7 +164,7 @@ void trace_enable_events(const char *line_buf)
}
}
void trace_init_events(const char *fname)
static void trace_init_events(const char *fname)
{
Location loc;
FILE *fp;
@ -217,3 +239,21 @@ bool trace_init_backends(void)
return true;
}
char *trace_opt_parse(const char *optarg)
{
char *trace_file;
QemuOpts *opts = qemu_opts_parse_noisily(qemu_find_opts("trace"),
optarg, true);
if (!opts) {
exit(1);
}
if (qemu_opt_get(opts, "enable")) {
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"));
qemu_opts_del(opts);
return trace_file;
}

25
trace/control.h
View File

@ -159,17 +159,6 @@ static void trace_event_set_state_dynamic(TraceEvent *ev, bool state);
*/
bool trace_init_backends(void);
/**
* trace_init_events:
* @events: Name of file with events to be enabled at startup; may be NULL.
* Corresponds to commandline option "-trace events=...".
*
* Read the list of enabled tracing events.
*
* Returns: Whether the backends could be successfully initialized.
*/
void trace_init_events(const char *file);
/**
* trace_init_file:
* @file: Name of trace output file; may be NULL.
@ -197,6 +186,20 @@ void trace_list_events(void);
*/
void trace_enable_events(const char *line_buf);
/**
* Definition of QEMU options describing trace subsystem configuration
*/
extern QemuOptsList qemu_trace_opts;
/**
* trace_opt_parse:
* @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);
#include "trace/control-internal.h"

38
vl.c
View File

@ -262,26 +262,6 @@ static QemuOptsList qemu_sandbox_opts = {
},
};
static QemuOptsList qemu_trace_opts = {
.name = "trace",
.implied_opt_name = "enable",
.head = QTAILQ_HEAD_INITIALIZER(qemu_trace_opts.head),
.desc = {
{
.name = "enable",
.type = QEMU_OPT_STRING,
},
{
.name = "events",
.type = QEMU_OPT_STRING,
},{
.name = "file",
.type = QEMU_OPT_STRING,
},
{ /* end of list */ }
},
};
static QemuOptsList qemu_option_rom_opts = {
.name = "option-rom",
.implied_opt_name = "romfile",
@ -3864,23 +3844,9 @@ int main(int argc, char **argv, char **envp)
xen_mode = XEN_ATTACH;
break;
case QEMU_OPTION_trace:
{
opts = qemu_opts_parse_noisily(qemu_find_opts("trace"),
optarg, true);
if (!opts) {
exit(1);
}
if (qemu_opt_get(opts, "enable")) {
trace_enable_events(qemu_opt_get(opts, "enable"));
}
trace_init_events(qemu_opt_get(opts, "events"));
if (trace_file) {
g_free(trace_file);
}
trace_file = g_strdup(qemu_opt_get(opts, "file"));
qemu_opts_del(opts);
g_free(trace_file);
trace_file = trace_opt_parse(optarg);
break;
}
case QEMU_OPTION_readconfig:
{
int ret = qemu_read_config_file(optarg);