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gdbstub/linux-user: support debugging over a unix socket

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While debugging over TCP is fairly straightforward now we have test
cases that want to orchestrate via make and currently a parallel build
fails as two processes can't use the same listening port. While system
emulation offers a wide cornucopia of connection methods thanks to the
chardev abstraction we are a little more limited for linux user.
Thankfully the programming API for a TCP socket and a local UNIX
socket is pretty much the same once it's set up.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200430190122.4592-7-alex.bennee@linaro.org>
This commit is contained in:
Alex Bennée 2020-04-30 20:01:19 +01:00
parent e0a1e20847
commit fcedd92086
4 changed files with 106 additions and 31 deletions
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8
bsd-user/main.c
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@ -738,7 +738,7 @@ int main(int argc, char **argv)
CPUState *cpu;
int optind;
const char *r;
int gdbstub_port = 0;
const char *gdbstub = NULL;
char **target_environ, **wrk;
envlist_t *envlist = NULL;
char *trace_file = NULL;
@ -814,7 +814,7 @@ int main(int argc, char **argv)
exit(1);
}
} else if (!strcmp(r, "g")) {
gdbstub_port = atoi(argv[optind++]);
gdbstub = g_strdup(argv[optind++]);
} else if (!strcmp(r, "r")) {
qemu_uname_release = argv[optind++];
} else if (!strcmp(r, "cpu")) {
@ -1124,8 +1124,8 @@ int main(int argc, char **argv)
#error unsupported target CPU
#endif
if (gdbstub_port) {
gdbserver_start (gdbstub_port);
if (gdbstub) {
gdbserver_start(gdbstub);
gdb_handlesig(cpu, 0);
}
cpu_loop(env);