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https://gitlab.com/qemu-project/qemu
synced 2024-09-06 01:43:39 +00:00
trace: Add trace file name command-line option
This patch adds an optional command line switch '-trace' to specify the filename to write traces to, when qemu starts. Eg, If compiled with the 'simple' trace backend, [temp@system]$ qemu -trace FILENAME IMAGE Allows the binary traces to be written to FILENAME instead of the option set at config-time. Signed-off-by: Prerna Saxena <prerna@linux.vnet.ibm.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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@ -288,6 +288,21 @@ static QemuOptsList qemu_mon_opts = {
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},
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};
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#ifdef CONFIG_SIMPLE_TRACE
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static QemuOptsList qemu_trace_opts = {
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.name = "trace",
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.implied_opt_name = "trace",
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.head = QTAILQ_HEAD_INITIALIZER(qemu_trace_opts.head),
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.desc = {
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{
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.name = "file",
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.type = QEMU_OPT_STRING,
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},
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{ /* end if list */ }
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},
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};
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#endif
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static QemuOptsList qemu_cpudef_opts = {
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.name = "cpudef",
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.head = QTAILQ_HEAD_INITIALIZER(qemu_cpudef_opts.head),
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@ -346,6 +361,9 @@ static QemuOptsList *vm_config_groups[32] = {
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&qemu_global_opts,
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&qemu_mon_opts,
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&qemu_cpudef_opts,
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#ifdef CONFIG_SIMPLE_TRACE
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&qemu_trace_opts,
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#endif
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NULL,
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};
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@ -2230,6 +2230,17 @@ Normally QEMU loads a configuration file from @var{sysconfdir}/qemu.conf and
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@var{sysconfdir}/target-@var{ARCH}.conf on startup. The @code{-nodefconfig}
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option will prevent QEMU from loading these configuration files at startup.
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ETEXI
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#ifdef CONFIG_SIMPLE_TRACE
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DEF("trace", HAS_ARG, QEMU_OPTION_trace,
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"-trace\n"
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" Specify a trace file to log traces to\n",
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QEMU_ARCH_ALL)
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STEXI
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@item -trace
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@findex -trace
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Specify a trace file to log output traces to.
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ETEXI
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#endif
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HXCOMM This is the last statement. Insert new options before this line!
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STEXI
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21
vl.c
21
vl.c
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@ -47,6 +47,10 @@
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#include <dirent.h>
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#include <netdb.h>
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#include <sys/select.h>
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#ifdef CONFIG_SIMPLE_TRACE
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#include "trace.h"
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#endif
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#ifdef CONFIG_BSD
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#include <sys/stat.h>
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
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@ -1823,6 +1827,9 @@ int main(int argc, char **argv, char **envp)
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int show_vnc_port = 0;
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int defconfig = 1;
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#ifdef CONFIG_SIMPLE_TRACE
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const char *trace_file = NULL;
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#endif
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atexit(qemu_run_exit_notifiers);
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error_set_progname(argv[0]);
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@ -2595,6 +2602,14 @@ int main(int argc, char **argv, char **envp)
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}
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xen_mode = XEN_ATTACH;
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break;
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#ifdef CONFIG_SIMPLE_TRACE
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case QEMU_OPTION_trace:
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opts = qemu_opts_parse(qemu_find_opts("trace"), optarg, 0);
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if (opts) {
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trace_file = qemu_opt_get(opts, "file");
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}
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break;
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#endif
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case QEMU_OPTION_readconfig:
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{
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int ret = qemu_read_config_file(optarg);
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@ -2638,6 +2653,12 @@ int main(int argc, char **argv, char **envp)
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data_dir = CONFIG_QEMU_DATADIR;
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}
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#ifdef CONFIG_SIMPLE_TRACE
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/*
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* Set the trace file name, if specified.
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*/
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st_set_trace_file(trace_file);
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#endif
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/*
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* Default to max_cpus = smp_cpus, in case the user doesn't
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* specify a max_cpus value.
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