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gdbstub: eliminate gdbserver_fd global

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We don't really need to track this fd beyond the initial creation of
the socket. We already know if the system has been initialised by
virtue of the gdbserver_state so lets remove it. This makes the later
re-factoring easier.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200430190122.4592-6-alex.bennee@linaro.org>
This commit is contained in:
Alex Bennée 2020-04-30 20:01:18 +01:00
parent 744f1b0f68
commit e0a1e20847
1 changed files with 11 additions and 13 deletions
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24
gdbstub.c
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@ -398,8 +398,6 @@ static void reset_gdbserver_state(void)
bool gdb_has_xml;
#ifdef CONFIG_USER_ONLY
/* XXX: This is not thread safe. Do we care? */
static int gdbserver_fd = -1;
static int get_char(void)
{
@ -2964,7 +2962,7 @@ void gdb_exit(CPUArchState *env, int code)
return;
}
#ifdef CONFIG_USER_ONLY
if (gdbserver_fd < 0 || gdbserver_state.fd < 0) {
if (gdbserver_state.fd < 0) {
return;
}
#endif
@ -3011,7 +3009,7 @@ gdb_handlesig(CPUState *cpu, int sig)
char buf[256];
int n;
if (gdbserver_fd < 0 || gdbserver_state.fd < 0) {
if (!gdbserver_state.init || gdbserver_state.fd < 0) {
return sig;
}
@ -3060,7 +3058,7 @@ void gdb_signalled(CPUArchState *env, int sig)
{
char buf[4];
if (gdbserver_fd < 0 || gdbserver_state.fd < 0) {
if (!gdbserver_state.init || gdbserver_state.fd < 0) {
return;
}
@ -3068,7 +3066,7 @@ void gdb_signalled(CPUArchState *env, int sig)
put_packet(buf);
}
static bool gdb_accept(void)
static bool gdb_accept(int gdb_fd)
{
struct sockaddr_in sockaddr;
socklen_t len;
@ -3076,7 +3074,7 @@ static bool gdb_accept(void)
for(;;) {
len = sizeof(sockaddr);
fd = accept(gdbserver_fd, (struct sockaddr *)&sockaddr, &len);
fd = accept(gdb_fd, (struct sockaddr *)&sockaddr, &len);
if (fd < 0 && errno != EINTR) {
perror("accept");
return false;
@ -3137,13 +3135,13 @@ static int gdbserver_open(int port)
int gdbserver_start(int port)
{
gdbserver_fd = gdbserver_open(port);
if (gdbserver_fd < 0)
int gdb_fd = gdbserver_open(port);
if (gdb_fd < 0) {
return -1;
}
/* accept connections */
if (!gdb_accept()) {
close(gdbserver_fd);
gdbserver_fd = -1;
if (!gdb_accept(gdb_fd)) {
close(gdb_fd);
return -1;
}
return 0;
@ -3152,7 +3150,7 @@ int gdbserver_start(int port)
/* Disable gdb stub for child processes. */
void gdbserver_fork(CPUState *cpu)
{
if (gdbserver_fd < 0 || gdbserver_state.fd < 0) {
if (!gdbserver_state.init || gdbserver_state.fd < 0) {
return;
}
close(gdbserver_state.fd);