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trace: [linux-user] Commandline arguments to control tracing 

[Changed const char *trace_file to char *trace_file since it's a
heap-allocated string that needs to be freed.  This type is also
returned by trace_opt_parse() and used in vl.c.
--Stefan]

Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Message-id: 146860251784.30668.17339867835129075077.stgit@fimbulvetr.bsc.es
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Lluís Vilanova 2016-07-15 19:08:38 +02:00 committed by Stefan Hajnoczi
parent 3913d3707e
commit 6533dd6e11
1 changed files with 19 additions and 0 deletions
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19
linux-user/main.c
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@ -24,6 +24,7 @@
#include "qapi/error.h"
#include "qemu.h"
#include "qemu/path.h"
#include "qemu/config-file.h"
#include "qemu/cutils.h"
#include "qemu/help_option.h"
#include "cpu.h"
@ -33,6 +34,8 @@
#include "qemu/envlist.h"
#include "elf.h"
#include "exec/log.h"
#include "trace/control.h"
#include "glib-compat.h"
char *exec_path;
@ -4001,6 +4004,13 @@ 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);
}
struct qemu_argument {
const char *argv;
const char *env;
@ -4048,6 +4058,8 @@ static const struct qemu_argument arg_table[] = {
"", "log system calls"},
{"seed", "QEMU_RAND_SEED", true, handle_arg_randseed,
"", "Seed for pseudo-random number generator"},
{"trace", "QEMU_TRACE", true, handle_arg_trace,
"", "[[enable=]<pattern>][,events=<file>][,file=<file>]"},
{"version", "QEMU_VERSION", false, handle_arg_version,
"", "display version information and exit"},
{NULL, NULL, false, NULL, NULL, NULL}
@ -4237,8 +4249,15 @@ int main(int argc, char **argv, char **envp)
srand(time(NULL));
qemu_add_opts(&qemu_trace_opts);
optind = parse_args(argc, argv);
if (!trace_init_backends()) {
exit(1);
}
trace_init_file(trace_file);
/* Zero out regs */
memset(regs, 0, sizeof(struct target_pt_regs));