int context_stop(Context * ctx) {
ContextExtensionVxWorks * ext = EXT(ctx);
struct event_info * info;
VXDBG_CTX vxdbg_ctx;
assert(is_dispatch_thread());
assert(ctx->parent != NULL);
assert(!ctx->stopped);
assert(!ctx->exited);
assert(!ext->regs_dirty);
if (ctx->pending_intercept) {
trace(LOG_CONTEXT, "context: stop ctx %#lx, id %#x", ctx, ext->pid);
}
else {
trace(LOG_CONTEXT, "context: temporary stop ctx %#lx, id %#x", ctx, ext->pid);
}
taskLock();
if (taskIsStopped(ext->pid)) {
/* Workaround for situation when a task was stopped without notifying TCF agent */
int n = 0;
SPIN_LOCK_ISR_TAKE(&events_lock);
n = events_cnt;
SPIN_LOCK_ISR_GIVE(&events_lock);
if (n > 0) {
trace(LOG_CONTEXT, "context: already stopped ctx %#lx, id %#x", ctx, ext->pid);
taskUnlock();
return 0;
}
}
else {
vxdbg_ctx.ctxId = ext->pid;
vxdbg_ctx.ctxType = VXDBG_CTX_TASK;
if (vxdbgStop(vxdbg_clnt_id, &vxdbg_ctx) != OK) {
int error = errno;
taskUnlock();
if (error == S_vxdbgLib_INVALID_CTX) return 0;
trace(LOG_ALWAYS, "context: can't stop ctx %#lx, id %#x: %s",
ctx, ext->pid, errno_to_str(error));
return -1;
}
}
assert(taskIsStopped(ext->pid));
info = event_info_alloc(EVENT_HOOK_STOP);
if (info != NULL) {
info->stopped_ctx.ctxId = ext->pid;
event_info_post(info);
}
taskUnlock();
return 0;
}
int run_test_process(ContextAttachCallBack * done, void * data) {
#if defined(WIN32)
char fnm[FILE_PATH_SIZE];
char cmd[FILE_PATH_SIZE];
int res = 0;
STARTUPINFO si;
PROCESS_INFORMATION prs;
ContextAttachArgs * args;
memset(&si, 0, sizeof(si));
memset(&prs, 0, sizeof(prs));
memset(fnm, 0, sizeof(fnm));
if (GetModuleFileName(NULL, fnm, sizeof(fnm)) == 0) {
set_win32_errno(GetLastError());
return -1;
}
si.cb = sizeof(si);
strcpy(cmd, "agent.exe -t");
if (CreateProcess(fnm, cmd, NULL, NULL,
FALSE, CREATE_SUSPENDED | CREATE_DEFAULT_ERROR_MODE | CREATE_NO_WINDOW,
NULL, NULL, &si, &prs) == 0) {
set_win32_errno(GetLastError());
return -1;
}
args = (ContextAttachArgs *)loc_alloc(sizeof(ContextAttachArgs));
args->done = done;
args->data = data;
args->thread = prs.hThread;
args->process = prs.hProcess;
res = context_attach(prs.dwProcessId, done_context_attach, args, 0);
if (res != 0) loc_free(args);
return res;
#elif defined(_WRS_KERNEL)
int tid = taskCreate("tTcf", 100, 0, 0x4000, (FUNCPTR)test_proc, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
if (tid == 0) return -1;
taskStop(tid);
taskActivate(tid);
assert(taskIsStopped(tid));
return context_attach(tid, done, data, 0);
#else
/* Create child process to debug */
int pid = fork();
if (pid < 0) return -1;
if (pid == 0) {
int fd;
if (context_attach_self() < 0) exit(1);
fd = sysconf(_SC_OPEN_MAX);
while (fd-- > 2) close(fd);
if (tkill(getpid(), SIGSTOP) < 0) exit(1);
test_proc();
exit(0);
}
return context_attach(pid, done, data, CONTEXT_ATTACH_SELF);
#endif
}
int context_continue(Context * ctx) {
ContextExtensionVxWorks * ext = EXT(ctx);
VXDBG_CTX vxdbg_ctx;
assert(is_dispatch_thread());
assert(ctx->parent != NULL);
assert(ctx->stopped);
assert(!ctx->pending_intercept);
assert(!ctx->exited);
assert(taskIsStopped(ext->pid));
trace(LOG_CONTEXT, "context: continue ctx %#lx, id %#x", ctx, ext->pid);
if (ext->regs_dirty) {
if (taskRegsSet(ext->pid, ext->regs) != OK) {
int error = errno;
trace(LOG_ALWAYS, "context: can't set regs ctx %#lx, id %#x: %s",
ctx, ext->pid, errno_to_str(error));
return -1;
}
ext->regs_dirty = 0;
}
vxdbg_ctx.ctxId = ext->pid;
vxdbg_ctx.ctxType = VXDBG_CTX_TASK;
taskLock();
if (vxdbgCont(vxdbg_clnt_id, &vxdbg_ctx) != OK) {
int error = errno;
taskUnlock();
trace(LOG_ALWAYS, "context: can't continue ctx %#lx, id %#x: %s",
ctx, ext->pid, errno_to_str(error));
return -1;
}
assert(!taskIsStopped(ext->pid));
taskUnlock();
send_context_started_event(ctx);
return 0;
}
static void event_attach_done(void * x) {
AttachDoneArgs * args = (AttachDoneArgs *)x;
if (context_find_from_pid(args->pid, 0) != NULL) {
args->done(ERR_ALREADY_ATTACHED, NULL, args->data);
}
else {
Context * ctx = NULL;
if (parent_ctx == NULL) {
pid_t pid = taskIdSelf();
parent_ctx = create_context(pid2id(pid, 0));
EXT(parent_ctx)->pid = pid;
parent_ctx->mem = parent_ctx;
parent_ctx->mem_access |= MEM_ACCESS_INSTRUCTION;
parent_ctx->mem_access |= MEM_ACCESS_DATA;
parent_ctx->big_endian = big_endian_host();
link_context(parent_ctx);
send_context_created_event(parent_ctx);
}
assert(parent_ctx->ref_count > 0);
ctx = create_context(pid2id(args->pid, EXT(parent_ctx)->pid));
EXT(ctx)->pid = args->pid;
EXT(ctx)->regs = (REG_SET *)loc_alloc(sizeof(REG_SET));
ctx->mem = parent_ctx;
ctx->big_endian = parent_ctx->big_endian;
(ctx->parent = parent_ctx)->ref_count++;
list_add_last(&ctx->cldl, &parent_ctx->children);
link_context(ctx);
trace(LOG_CONTEXT, "context: attached: ctx %#lx, id %#x", ctx, EXT(ctx)->pid);
send_context_created_event(ctx);
args->done(0, ctx, args->data);
if (taskIsStopped(args->pid)) {
struct event_info * info;
ctx->pending_intercept = 1;
info = event_info_alloc(EVENT_HOOK_STOP);
if (info != NULL) {
info->stopped_ctx.ctxId = args->pid;
event_info_post(info);
}
}
}
loc_free(x);
}
static int context_terminate(Context * ctx) {
ContextExtensionVxWorks * ext = EXT(ctx);
VXDBG_CTX vxdbg_ctx;
assert(is_dispatch_thread());
assert(ctx->parent != NULL);
assert(ctx->stopped);
assert(!ctx->pending_intercept);
assert(!ctx->exited);
assert(taskIsStopped(ext->pid));
trace(LOG_CONTEXT, "context: terminate ctx %#lx, id %#x", ctx, ext->pid);
if (ext->regs_dirty) {
taskRegsSet(ext->pid, ext->regs);
ext->regs_dirty = 0;
}
return kill_context(ctx);
}
static void event_handler(void * arg) {
struct event_info * info = (struct event_info *)arg;
Context * current_ctx = context_find_from_pid(info->current_ctx.ctxId, 1);
Context * stopped_ctx = context_find_from_pid(info->stopped_ctx.ctxId, 1);
switch (info->event) {
case EVENT_HOOK_BREAKPOINT:
if (stopped_ctx == NULL) break;
assert(!stopped_ctx->stopped);
assert(!EXT(stopped_ctx)->regs_dirty);
if (EXT(stopped_ctx)->regs_error) {
release_error_report(EXT(stopped_ctx)->regs_error);
EXT(stopped_ctx)->regs_error = NULL;
}
memcpy(EXT(stopped_ctx)->regs, &info->regs, sizeof(REG_SET));
EXT(stopped_ctx)->event = 0;
stopped_ctx->signal = SIGTRAP;
stopped_ctx->stopped = 1;
stopped_ctx->stopped_by_bp = info->bp_info_ok;
stopped_ctx->stopped_by_exception = 0;
assert(get_regs_PC(stopped_ctx) == info->addr);
if (stopped_ctx->stopped_by_bp && !is_breakpoint_address(stopped_ctx, info->addr)) {
/* Break instruction that is not planted by us */
stopped_ctx->stopped_by_bp = 0;
stopped_ctx->pending_intercept = 1;
}
EXT(stopped_ctx)->bp_info = info->bp_info;
if (current_ctx != NULL) EXT(stopped_ctx)->bp_pid = EXT(current_ctx)->pid;
assert(taskIsStopped(EXT(stopped_ctx)->pid));
trace(LOG_CONTEXT, "context: stopped by breakpoint: ctx %#lx, id %#x",
stopped_ctx, EXT(stopped_ctx)->pid);
send_context_stopped_event(stopped_ctx);
break;
case EVENT_HOOK_STEP_DONE:
if (current_ctx == NULL) break;
assert(!current_ctx->stopped);
assert(!EXT(current_ctx)->regs_dirty);
if (EXT(current_ctx)->regs_error) {
release_error_report(EXT(current_ctx)->regs_error);
EXT(current_ctx)->regs_error = NULL;
}
memcpy(EXT(current_ctx)->regs, &info->regs, sizeof(REG_SET));
EXT(current_ctx)->event = TRACE_EVENT_STEP;
current_ctx->signal = SIGTRAP;
current_ctx->stopped = 1;
current_ctx->stopped_by_bp = 0;
current_ctx->stopped_by_exception = 0;
assert(taskIsStopped(EXT(current_ctx)->pid));
trace(LOG_CONTEXT, "context: stopped by end of step: ctx %#lx, id %#x",
current_ctx, EXT(current_ctx)->pid);
send_context_stopped_event(current_ctx);
break;
case EVENT_HOOK_STOP:
if (stopped_ctx == NULL) break;
assert(!stopped_ctx->exited);
if (stopped_ctx->stopped) break;
if (EXT(stopped_ctx)->regs_error) {
release_error_report(EXT(stopped_ctx)->regs_error);
EXT(stopped_ctx)->regs_error = NULL;
}
if (taskRegsGet(EXT(stopped_ctx)->pid, EXT(stopped_ctx)->regs) != OK) {
EXT(stopped_ctx)->regs_error = get_error_report(errno);
assert(EXT(stopped_ctx)->regs_error != NULL);
}
EXT(stopped_ctx)->event = 0;
stopped_ctx->signal = SIGSTOP;
stopped_ctx->stopped = 1;
stopped_ctx->stopped_by_bp = 0;
stopped_ctx->stopped_by_exception = 0;
assert(taskIsStopped(EXT(stopped_ctx)->pid));
trace(LOG_CONTEXT, "context: stopped by sofware request: ctx %#lx, id %#x",
stopped_ctx, EXT(stopped_ctx)->pid);
send_context_stopped_event(stopped_ctx);
break;
case EVENT_HOOK_TASK_ADD:
if (current_ctx == NULL) break;
assert(stopped_ctx == NULL);
stopped_ctx = create_context(pid2id((pid_t)info->stopped_ctx.ctxId, EXT(current_ctx->parent)->pid));
EXT(stopped_ctx)->pid = (pid_t)info->stopped_ctx.ctxId;
EXT(stopped_ctx)->regs = (REG_SET *)loc_alloc(sizeof(REG_SET));
stopped_ctx->mem = current_ctx->mem;
stopped_ctx->big_endian = current_ctx->mem->big_endian;
(stopped_ctx->creator = current_ctx)->ref_count++;
(stopped_ctx->parent = current_ctx->parent)->ref_count++;
assert(stopped_ctx->mem == stopped_ctx->parent->mem);
list_add_last(&stopped_ctx->cldl, &stopped_ctx->parent->children);
link_context(stopped_ctx);
trace(LOG_CONTEXT, "context: created: ctx %#lx, id %#x",
stopped_ctx, EXT(stopped_ctx)->pid);
send_context_created_event(stopped_ctx);
break;
default:
assert(0);
break;
}
loc_free(info);
SPIN_LOCK_ISR_TAKE(&events_lock);
events_cnt--;
SPIN_LOCK_ISR_GIVE(&events_lock);
}
static int start_process(Channel * c, char ** envp, char * dir, char * exe, char ** args, int attach,
int * pid, int * selfattach, ChildProcess ** prs) {
int err = 0;
char * ptr;
SYM_TYPE type;
if (symFindByName(sysSymTbl, exe, &ptr, &type) != OK) {
err = errno;
if (err == S_symLib_SYMBOL_NOT_FOUND) err = ERR_SYM_NOT_FOUND;
assert(err != 0);
}
else {
int i;
int pipes[2][2];
/* TODO: arguments, environment */
*pid = taskCreate("tTcf", 100, 0, 0x4000, (FUNCPTR)ptr, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
for (i = 0; i < 2; i++) {
char pnm[32];
char pnm_m[32];
char pnm_s[32];
snprintf(pnm, sizeof(pnm), "/pty/tcf-%0*lx-%d", sizeof(*pid) * 2, *pid, i);
snprintf(pnm_m, sizeof(pnm_m), "%sM", pnm);
snprintf(pnm_s, sizeof(pnm_m), "%sS", pnm);
if (ptyDevCreate(pnm, PIPE_SIZE, PIPE_SIZE) == ERROR) {
err = errno;
break;
}
pipes[i][0] = open(pnm_m, O_RDWR, 0);
pipes[i][1] = open(pnm_s, O_RDWR, 0);
if (pipes[i][0] < 0 || pipes[i][1] < 0) {
err = errno;
break;
}
}
if (err) {
taskDelete(*pid);
*pid = 0;
}
else {
semTake(prs_list_lock, WAIT_FOREVER);
ioTaskStdSet(*pid, 0, pipes[0][1]);
ioTaskStdSet(*pid, 1, pipes[0][1]);
ioTaskStdSet(*pid, 2, pipes[1][1]);
*prs = loc_alloc_zero(sizeof(ChildProcess));
(*prs)->inp = pipes[0][0];
(*prs)->out = pipes[0][0];
(*prs)->err = pipes[1][0];
(*prs)->pid = *pid;
(*prs)->bcg = c->bcg;
list_add_first(&(*prs)->link, &prs_list);
if (attach) {
taskStop(*pid);
taskActivate(*pid);
assert(taskIsStopped(*pid));
}
else {
taskActivate(*pid);
}
semGive(prs_list_lock);
}
}
if (!err) return 0;
errno = err;
return -1;
}
