adb: fix subprocess exit handling, oom adjust fixes, extra debugging. (408fa578) · Commits · e / os / android_system_core

adb/adb.c

+15 −11

Original line number	Diff line number	Diff line
		@@ -36,6 +36,9 @@
		#include "usb_vendors.h"
		#endif

		#if ADB_TRACE
		ADB_MUTEX_DEFINE( D_lock );
		#endif

		int HOST = 0;

		@@ -90,6 +93,7 @@ void adb_trace_init(void)
		{ "sysdeps", TRACE_SYSDEPS },
		{ "transport", TRACE_TRANSPORT },
		{ "jdwp", TRACE_JDWP },
		{ "services", TRACE_SERVICES },
		{ NULL, 0 }
		};

		@@ -591,14 +595,6 @@ nomem:
		return 0;
		}

		#ifdef HAVE_FORKEXEC
		static void sigchld_handler(int n)
		{
		int status;
		while(waitpid(-1, &status, WNOHANG) > 0) ;
		}
		#endif

		#ifdef HAVE_WIN32_PROC
		static BOOL WINAPI ctrlc_handler(DWORD type)
		{
		@@ -641,6 +637,7 @@ void start_logging(void)

		fd = unix_open("/dev/null", O_RDONLY);
		dup2(fd, 0);
		adb_close(fd);

		fd = unix_open("/tmp/adb.log", O_WRONLY \| O_CREAT \| O_APPEND, 0640);
		if(fd < 0) {
		@@ -648,6 +645,7 @@ void start_logging(void)
		}
		dup2(fd, 1);
		dup2(fd, 2);
		adb_close(fd);
		fprintf(stderr,"--- adb starting (pid %d) ---\n", getpid());
		#endif
		}
		@@ -807,9 +805,10 @@ int launch_server(int server_port)
		// wait for the "OK\n" message
		adb_close(fd[1]);
		int ret = adb_read(fd[0], temp, 3);
		int saved_errno = errno;
		adb_close(fd[0]);
		if (ret < 0) {
		fprintf(stderr, "could not read ok from ADB Server, errno = %d\n", errno);
		fprintf(stderr, "could not read ok from ADB Server, errno = %d\n", saved_errno);
		return -1;
		}
		if (ret != 3 \|\| temp[0] != 'O' \|\| temp[1] != 'K' \|\| temp[2] != '\n') {
		@@ -848,7 +847,7 @@ int adb_main(int is_daemon, int server_port)
		#ifdef HAVE_WIN32_PROC
		SetConsoleCtrlHandler( ctrlc_handler, TRUE );
		#elif defined(HAVE_FORKEXEC)
		signal(SIGCHLD, sigchld_handler);
		// No SIGCHLD. Let the service subproc handle its children.
		signal(SIGPIPE, SIG_IGN);
		#endif

		@@ -957,7 +956,9 @@ int adb_main(int is_daemon, int server_port)
		// listen on default port
		local_init(DEFAULT_ADB_LOCAL_TRANSPORT_PORT);
		}
		D("adb_main(): pre init_jdwp()\n");
		init_jdwp();
		D("adb_main(): post init_jdwp()\n");
		#endif

		if (is_daemon)
		@@ -971,6 +972,7 @@ int adb_main(int is_daemon, int server_port)
		#endif
		start_logging();
		}
		D("Event loop starting\n");

		fdevent_loop();

		@@ -1269,8 +1271,9 @@ int recovery_mode = 0;
		int main(int argc, char **argv)
		{
		#if ADB_HOST
		adb_trace_init();
		adb_sysdeps_init();
		adb_trace_init();
		D("Handling commandline()\n");
		return adb_commandline(argc - 1, argv + 1);
		#else
		if((argc > 1) && (!strcmp(argv[1],"recovery"))) {
		@@ -1279,6 +1282,7 @@ int main(int argc, char **argv)
		}

		start_device_log();
		D("Handling main()\n");
		return adb_main(0, DEFAULT_ADB_PORT);
		#endif
		}

adb/adb.h

+33 −14

Original line number	Diff line number	Diff line
		@@ -19,6 +19,8 @@

		#include <limits.h>

		#include "transport.h" /* readx(), writex() */

		#define MAX_PAYLOAD 4096

		#define A_SYNC 0x434e5953
		@@ -315,13 +317,6 @@ void put_apacket(apacket *p);
		int check_header(apacket *p);
		int check_data(apacket *p);

		/* convenience wrappers around read/write that will retry on
		** EINTR and/or short read/write. Returns 0 on success, -1
		** on error or EOF.
		*/
		int readx(int fd, void *ptr, size_t len);
		int writex(int fd, const void *ptr, size_t len);

		/* define ADB_TRACE to 1 to enable tracing support, or 0 to disable it */

		#define ADB_TRACE 1
		@@ -331,21 +326,22 @@ int writex(int fd, const void *ptr, size_t len);
		* the adb_trace_init() function implemented in adb.c
		*/
		typedef enum {
		TRACE_ADB = 0,
		TRACE_ADB = 0, /* 0x001 */
		TRACE_SOCKETS,
		TRACE_PACKETS,
		TRACE_TRANSPORT,
		TRACE_RWX,
		TRACE_RWX, /* 0x010 */
		TRACE_USB,
		TRACE_SYNC,
		TRACE_SYSDEPS,
		TRACE_JDWP,
		TRACE_JDWP, /* 0x100 */
		TRACE_SERVICES,
		} AdbTrace;

		#if ADB_TRACE

		int adb_trace_mask;

		extern int adb_trace_mask;
		extern unsigned char adb_trace_output_count;
		void adb_trace_init(void);

		# define ADB_TRACING ((adb_trace_mask & (1 << TRACE_TAG)) != 0)
		@@ -353,11 +349,33 @@ typedef enum {
		/* you must define TRACE_TAG before using this macro */
		# define D(...) \
		do { \
		if (ADB_TRACING) \
		if (ADB_TRACING) { \
		int save_errno = errno; \
		adb_mutex_lock(&D_lock); \
		fprintf(stderr, "%s::%s():", \
		__FILE__, __FUNCTION__); \
		errno = save_errno; \
		fprintf(stderr, __VA_ARGS__ ); \
		fflush(stderr); \
		adb_mutex_unlock(&D_lock); \
		errno = save_errno; \
		} \
		} while (0)
		# define DR(...) \
		do { \
		if (ADB_TRACING) { \
		int save_errno = errno; \
		adb_mutex_lock(&D_lock); \
		errno = save_errno; \
		fprintf(stderr, __VA_ARGS__ ); \
		fflush(stderr); \
		adb_mutex_unlock(&D_lock); \
		errno = save_errno; \
		} \
		} while (0)
		#else
		# define D(...) ((void)0)
		# define DR(...) ((void)0)
		# define ADB_TRACING 0
		#endif

		@@ -413,6 +431,7 @@ int connection_state(atransport *t);
		#define CS_NOPERM 5 /* Insufficient permissions to communicate with the device */

		extern int HOST;
		extern int SHELL_EXIT_NOTIFY_FD;

		#define CHUNK_SIZE (64*1024)

adb/adb_client.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -202,6 +202,7 @@ int _adb_connect(const char *service)
		return -1;
		}

		D("_adb_connect: return fd %d\n", fd);
		return fd;
		}

		@@ -210,6 +211,7 @@ int adb_connect(const char *service)
		// first query the adb server's version
		int fd = _adb_connect("host:version");

		D("adb_connect: service %s\n", service);
		if(fd == -2) {
		fprintf(stdout,"* daemon not running. starting it now on port %d *\n",
		__adb_server_port);
		@@ -266,6 +268,7 @@ int adb_connect(const char *service)
		if(fd == -2) {
		fprintf(stderr,"** daemon still not running");
		}
		D("adb_connect: return fd %d\n", fd);

		return fd;
		error:

adb/commandline.c

+9 −11

Original line number	Diff line number	Diff line
		@@ -37,12 +37,6 @@
		#include "adb_client.h"
		#include "file_sync_service.h"

		enum {
		IGNORE_DATA,
		WIPE_DATA,
		FLASH_DATA
		};

		static int do_cmd(transport_type ttype, char* serial, char *cmd, ...);

		void get_my_path(char *s, size_t maxLen);
		@@ -138,11 +132,6 @@ void help()
		" adb help - show this help message\n"
		" adb version - show version num\n"
		"\n"
		"DATAOPTS:\n"
		" (no option) - don't touch the data partition\n"
		" -w - wipe the data partition\n"
		" -d - flash the data partition\n"
		"\n"
		"scripting:\n"
		" adb wait-for-device - block until device is online\n"
		" adb start-server - ensure that there is a server running\n"
		@@ -218,7 +207,9 @@ static void read_and_dump(int fd)
		int len;

		while(fd >= 0) {
		D("read_and_dump(): pre adb_read(fd=%d)\n", fd);
		len = adb_read(fd, buf, 4096);
		D("read_and_dump(): post adb_read(fd=%d): len=%d\n", fd, len);
		if(len == 0) {
		break;
		}
		@@ -246,7 +237,9 @@ static void stdin_read_thread(void x)

		for(;;) {
		/* fdi is really the client's stdin, so use read, not adb_read here */
		D("stdin_read_thread(): pre unix_read(fdi=%d,...)\n", fdi);
		r = unix_read(fdi, buf, 1024);
		D("stdin_read_thread(): post unix_read(fdi=%d,...)\n", fdi);
		if(r == 0) break;
		if(r < 0) {
		if(errno == EINTR) continue;
		@@ -853,6 +846,7 @@ top:
		}

		if(argc < 2) {
		D("starting interactive shell\n");
		r = interactive_shell();
		if (h) {
		printf("\x1b[0m");
		@@ -877,9 +871,12 @@ top:
		}

		for(;;) {
		D("interactive shell loop. buff=%s\n", buf);
		fd = adb_connect(buf);
		if(fd >= 0) {
		D("about to read_and_dump(fd=%d)\n", fd);
		read_and_dump(fd);
		D("read_and_dump() done.\n");
		adb_close(fd);
		r = 0;
		} else {
		@@ -896,6 +893,7 @@ top:
		printf("\x1b[0m");
		fflush(stdout);
		}
		D("interactive shell loop. return r=%d\n", r);
		return r;
		}
		}

adb/fdevent.c

+215 −26

Original line number	Diff line number	Diff line
		@@ -15,6 +15,8 @@
		** limitations under the License.
		*/

		#include <sys/ioctl.h>

		#include <stdlib.h>
		#include <stdio.h>
		#include <string.h>
		@@ -27,10 +29,20 @@
		#include <stddef.h>

		#include "fdevent.h"
		#include "transport.h"
		#include "sysdeps.h"


		#define TRACE(x...) fprintf(stderr,x)
		/* !!! Do not enable DEBUG for the adb that will run as the server:
		** both stdout and stderr are used to communicate between the client
		** and server. Any extra output will cause failures.
		*/
		#define DEBUG 0 /* non-0 will break adb server */

		#define DEBUG 0
		// This socket is used when a subproc shell service exists.
		// It wakes up the fdevent_loop() and cause the correct handling
		// of the shell's pseudo-tty master. I.e. force close it.
		int SHELL_EXIT_NOTIFY_FD = -1;

		static void fatal(const char fn, const char fmt, ...)
		{
		@@ -45,15 +57,28 @@ static void fatal(const char fn, const char fmt, ...)
		#define FATAL(x...) fatal(__FUNCTION__, x)

		#if DEBUG
		#define D(...) \
		do { \
		adb_mutex_lock(&D_lock); \
		int save_errno = errno; \
		fprintf(stderr, "%s::%s():", __FILE__, __FUNCTION__); \
		errno = save_errno; \
		fprintf(stderr, __VA_ARGS__); \
		adb_mutex_unlock(&D_lock); \
		errno = save_errno; \
		} while(0)
		static void dump_fde(fdevent fde, const char info)
		{
		adb_mutex_lock(&D_lock);
		fprintf(stderr,"FDE #%03d %c%c%c %s\n", fde->fd,
		fde->state & FDE_READ ? 'R' : ' ',
		fde->state & FDE_WRITE ? 'W' : ' ',
		fde->state & FDE_ERROR ? 'E' : ' ',
		info);
		adb_mutex_unlock(&D_lock);
		}
		#else
		#define D(...) ((void)0)
		#define dump_fde(fde, info) do { } while(0)
		#endif

		@@ -67,6 +92,7 @@ static void dump_fde(fdevent fde, const char info)
		static void fdevent_plist_enqueue(fdevent *node);
		static void fdevent_plist_remove(fdevent *node);
		static fdevent *fdevent_plist_dequeue(void);
		static void fdevent_subproc_event_func(int fd, unsigned events, void *userdata);

		static fdevent list_pending = {
		.next = &list_pending,
		@@ -273,6 +299,69 @@ static void fdevent_update(fdevent *fde, unsigned events)
		fde->state = (fde->state & FDE_STATEMASK) \| events;
		}

		/* Looks at fd_table[] for bad FDs and sets bit in fds.
		** Returns the number of bad FDs.
		*/
		static int fdevent_fd_check(fd_set *fds)
		{
		int i, n = 0;
		fdevent *fde;

		for(i = 0; i < select_n; i++) {
		fde = fd_table[i];
		if(fde == 0) continue;
		if(fcntl(i, F_GETFL, NULL) < 0) {
		FD_SET(i, fds);
		n++;
		// fde->state \|= FDE_DONT_CLOSE;

		}
		}
		return n;
		}

		#if !DEBUG
		static inline void dump_all_fds(const char *extra_msg) {}
		#else
		static void dump_all_fds(const char *extra_msg)
		{
		int i;
		fdevent *fde;
		// per fd: 4 digits (but really: log10(FD_SETSIZE)), 1 staus, 1 blank
		char msg_buff[FD_SETSIZE6 + 1], pb=msg_buff;
		size_t max_chars = FD_SETSIZE * 6 + 1;
		int printed_out;
		#define SAFE_SPRINTF(...) \
		do { \
		printed_out = snprintf(pb, max_chars, __VA_ARGS__); \
		if (printed_out <= 0) { \
		D("... snprintf failed.\n"); \
		return; \
		} \
		if (max_chars < (unsigned int)printed_out) { \
		D("... snprintf out of space.\n"); \
		return; \
		} \
		pb += printed_out; \
		max_chars -= printed_out; \
		} while(0)

		for(i = 0; i < select_n; i++) {
		fde = fd_table[i];
		SAFE_SPRINTF("%d", i);
		if(fde == 0) {
		SAFE_SPRINTF("? ");
		continue;
		}
		if(fcntl(i, F_GETFL, NULL) < 0) {
		SAFE_SPRINTF("b");
		}
		SAFE_SPRINTF(" ");
		}
		D("%s fd_table[]->fd = {%s}\n", extra_msg, msg_buff);
		}
		#endif

		static void fdevent_process()
		{
		int i, n;
		@@ -284,28 +373,49 @@ static void fdevent_process()
		memcpy(&wfd, &write_fds, sizeof(fd_set));
		memcpy(&efd, &error_fds, sizeof(fd_set));

		n = select(select_n, &rfd, &wfd, &efd, 0);
		dump_all_fds("pre select()");

		n = select(select_n, &rfd, &wfd, &efd, NULL);
		int saved_errno = errno;
		D("select() returned n=%d, errno=%d\n", n, n<0?saved_errno:0);

		dump_all_fds("post select()");

		if(n < 0) {
		if(errno == EINTR) return;
		perror("select");
		switch(saved_errno) {
		case EINTR: return;
		case EBADF:
		// Can't trust the FD sets after an error.
		FD_ZERO(&wfd);
		FD_ZERO(&efd);
		FD_ZERO(&rfd);
		break;
		default:
		D("Unexpected select() error=%d\n", saved_errno);
		return;
		}
		}
		if(n <= 0) {
		// We fake a read, as the rest of the code assumes
		// that errors will be detected at that point.
		n = fdevent_fd_check(&rfd);
		}

		for(i = 0; (i < select_n) && (n > 0); i++) {
		events = 0;
		if(FD_ISSET(i, &rfd)) events \|= FDE_READ;
		if(FD_ISSET(i, &wfd)) events \|= FDE_WRITE;
		if(FD_ISSET(i, &efd)) events \|= FDE_ERROR;
		if(FD_ISSET(i, &rfd)) { events \|= FDE_READ; n--; }
		if(FD_ISSET(i, &wfd)) { events \|= FDE_WRITE; n--; }
		if(FD_ISSET(i, &efd)) { events \|= FDE_ERROR; n--; }

		if(events) {
		n--;

		fde = fd_table[i];
		if(fde == 0) FATAL("missing fde for fd %d\n", i);
		if(fde == 0)
		FATAL("missing fde for fd %d\n", i);

		fde->events \|= events;

		D("got events fde->fd=%d events=%04x, state=%04x\n",
		fde->fd, fde->events, fde->state);
		if(fde->state & FDE_PENDING) continue;
		fde->state \|= FDE_PENDING;
		fdevent_plist_enqueue(fde);
		@@ -350,14 +460,14 @@ static void fdevent_unregister(fdevent *fde)
		}

		if(fd_table[fde->fd] != fde) {
		FATAL("fd_table out of sync");
		FATAL("fd_table out of sync [%d]\n", fde->fd);
		}

		fd_table[fde->fd] = 0;

		if(!(fde->state & FDE_DONT_CLOSE)) {
		dump_fde(fde, "close");
		close(fde->fd);
		adb_close(fde->fd);
		}
		}

		@@ -394,6 +504,74 @@ static fdevent *fdevent_plist_dequeue(void)
		return node;
		}

		static void fdevent_call_fdfunc(fdevent* fde)
		{
		unsigned events = fde->events;
		fde->events = 0;
		if(!(fde->state & FDE_PENDING)) return;
		fde->state &= (~FDE_PENDING);
		dump_fde(fde, "callback");
		fde->func(fde->fd, events, fde->arg);
		}

		static void fdevent_subproc_event_func(int fd, unsigned ev, void *userdata)
		{

		D("subproc handling on fd=%d ev=%04x\n", fd, ev);

		// Hook oneself back into the fde's suitable for select() on read.
		if((fd < 0) \|\| (fd >= fd_table_max)) {
		FATAL("fd %d out of range for fd_table \n", fd);
		}
		fdevent *fde = fd_table[fd];
		fdevent_add(fde, FDE_READ);

		if(ev & FDE_READ){
		int subproc_fd;

		if(readx(fd, &subproc_fd, sizeof(subproc_fd))) {
		FATAL("Failed to read the subproc's fd from fd=%d\n", fd);
		}
		if((subproc_fd < 0) \|\| (subproc_fd >= fd_table_max)) {
		D("subproc_fd %d out of range 0, fd_table_max=%d\n",
		subproc_fd, fd_table_max);
		return;
		}
		fdevent *subproc_fde = fd_table[subproc_fd];
		if(!subproc_fde) {
		D("subproc_fd %d cleared from fd_table\n", subproc_fd);
		return;
		}
		if(subproc_fde->fd != subproc_fd) {
		// Already reallocated?
		D("subproc_fd %d != fd_table[].fd %d\n", subproc_fd, subproc_fde->fd);
		return;
		}

		subproc_fde->force_eof = 1;

		int rcount = 0;
		ioctl(subproc_fd, TIOCINQ, &rcount);
		D("subproc with fd=%d has rcount=%d err=%d\n",
		subproc_fd, rcount, errno);

		if(rcount) {
		// If there is data left, it will show up in the select().
		// This works because there is no other thread reading that
		// data when in this fd_func().
		return;
		}

		D("subproc_fde.state=%04x\n", subproc_fde->state);
		subproc_fde->events \|= FDE_READ;
		if(subproc_fde->state & FDE_PENDING) {
		return;
		}
		subproc_fde->state \|= FDE_PENDING;
		fdevent_call_fdfunc(subproc_fde);
		}
		}

		fdevent fdevent_create(int fd, fd_func func, void arg)
		{
		fdevent fde = (fdevent) malloc(sizeof(fdevent));
		@@ -417,6 +595,7 @@ void fdevent_install(fdevent fde, int fd, fd_func func, void arg)
		memset(fde, 0, sizeof(fdevent));
		fde->state = FDE_ACTIVE;
		fde->fd = fd;
		fde->force_eof = 0;
		fde->func = func;
		fde->arg = arg;

		@@ -484,23 +663,33 @@ void fdevent_del(fdevent *fde, unsigned events)
		fde, (fde->state & FDE_EVENTMASK) & (~(events & FDE_EVENTMASK)));
		}

		void fdevent_subproc_setup()
		{
		int s[2];

		if(adb_socketpair(s)) {
		FATAL("cannot create shell-exit socket-pair\n");
		}
		SHELL_EXIT_NOTIFY_FD = s[0];
		fdevent *fde;
		fde = fdevent_create(s[1], fdevent_subproc_event_func, NULL);
		if(!fde)
		FATAL("cannot create fdevent for shell-exit handler\n");
		fdevent_add(fde, FDE_READ);
		}

		void fdevent_loop()
		{
		fdevent *fde;
		fdevent_subproc_setup();

		for(;;) {
		#if DEBUG
		fprintf(stderr,"--- ---- waiting for events\n");
		#endif
		D("--- ---- waiting for events\n");

		fdevent_process();

		while((fde = fdevent_plist_dequeue())) {
		unsigned events = fde->events;
		fde->events = 0;
		fde->state &= (~FDE_PENDING);
		dump_fde(fde, "callback");
		fde->func(fde->fd, events, fde->arg);
		fdevent_call_fdfunc(fde);
		}
		}
		}