/proc/mcos?/<pid>/task/<tid>/stat support
This commit is contained in:
Tomoki Shirasawa
106
kernel/procfs.c
106
kernel/procfs.c
@ -33,6 +33,7 @@
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#endif
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extern int snprintf(char * buf, size_t size, const char *fmt, ...);
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extern int sprintf(char * buf, const char *fmt, ...);
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extern int sscanf(const char * buf, const char * fmt, ...);
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extern int osnum;
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@ -65,6 +66,9 @@ void create_proc_procfs_files(int pid, int cpuid)
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snprintf(fname, PROCFS_NAME_MAX, "mcos%d/%d/task/%d/mem", osnum, pid, pid);
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create_proc_procfs_file(pid, fname, 0400, cpuid);
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snprintf(fname, PROCFS_NAME_MAX, "mcos%d/%d/task/%d/stat", osnum, pid, pid);
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create_proc_procfs_file(pid, fname, 0444, cpuid);
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dprintf("create procfs files: done\n");
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}
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@ -97,6 +101,9 @@ void delete_proc_procfs_files(int pid)
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snprintf(fname, PROCFS_NAME_MAX, "mcos%d/%d/task/%d/mem", osnum, pid, pid);
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delete_proc_procfs_file(pid, fname);
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snprintf(fname, PROCFS_NAME_MAX, "mcos%d/%d/task/%d/stat", osnum, pid, pid);
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delete_proc_procfs_file(pid, fname);
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snprintf(fname, PROCFS_NAME_MAX, "mcos%d/%d/task/%d", osnum, pid, pid);
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delete_proc_procfs_file(pid, fname);
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@ -192,6 +199,8 @@ void process_procfs_request(unsigned long rarg)
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int rosnum, ret, pid, tid, ans = -EIO, eof = 0;
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char *buf, *p;
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struct ihk_ikc_channel_desc *syscall_channel;
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void *savelock;
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unsigned long irqstate;
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dprintf("process_procfs_request: invoked.\n");
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@ -257,9 +266,6 @@ void process_procfs_request(unsigned long rarg)
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if (ret == 1) {
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if (pid != cpu_local_var(current)->pid) {
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/* We are not located in the proper cpu for some reason. */
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void *savelock;
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unsigned long irqstate;
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struct process *proc;
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dprintf("mismatched pid. We are %d, but requested pid is %d.\n",
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pid, cpu_local_var(current)->pid);
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@ -305,28 +311,88 @@ void process_procfs_request(unsigned long rarg)
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* The offset is treated as the beginning of the virtual address area
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* of the process. The count is the length of the area.
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*/
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ret = sscanf(p, "task/%d/mem", &tid);
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tid = pid;
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ret = sscanf(p, "task/%d/", &tid);
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if (ret == 1) {
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struct vm_range *range;
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struct process_vm *vm = proc->vm;
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p = strchr(p, '/') + 1;
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p = strchr(p, '/') + 1;
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if (pid != tid) {
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/* We are not multithreaded yet. */
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goto end;
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}
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list_for_each_entry(range, &vm->vm_range_list, list) {
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dprintf("range: %lx - %lx\n", range->start, range->end);
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if ((range->start <= r->offset) &&
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(r->offset < range->end)) {
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unsigned int len = r->count;
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if (range->end < r->offset + r->count) {
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len = range->end - r->offset;
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if (!strcmp(p, "mem")){
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struct vm_range *range;
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struct process_vm *vm = proc->vm;
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if (pid != tid) {
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/* We are not multithreaded yet. */
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goto end;
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}
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list_for_each_entry(range, &vm->vm_range_list, list) {
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dprintf("range: %lx - %lx\n", range->start, range->end);
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if ((range->start <= r->offset) &&
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(r->offset < range->end)) {
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unsigned int len = r->count;
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if (range->end < r->offset + r->count) {
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len = range->end - r->offset;
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}
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memcpy((void *)buf, (void *)range->start, len);
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ans = len;
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break;
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}
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memcpy((void *)buf, (void *)range->start, len);
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ans = len;
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break;
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}
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goto end;
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}
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if (!strcmp(p, "stat")) {
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if ((proc = findthread_and_lock(pid, tid, &savelock, &irqstate))){
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dprintf("thread found! pid=%d tid=%d\n", pid, tid);
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/*
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* pid (comm) state ppid
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* pgrp session tty_nr tpgid
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* flags minflt cminflt majflt
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* cmajflt utime stime cutime
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* cstime priority nice num_threads
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* itrealvalue starttime vsize rss
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* rsslim startcode endcode startstack
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* kstkesp kstkeip signal blocked
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* sigignore sigcatch wchan nswap
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* cnswap exit_signal processor rt_priority
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* policy delayacct_blkio_ticks guest_time cguest_time
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*/
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ans = sprintf((char *)buf,
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"%d (%s) %c %d " // pid...
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"%d %d %d %d " // pgrp...
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"%u %lu %lu %lu " // flags...
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"%lu %lu %lu %ld " // cmajflt...
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"%ld %ld %ld %ld " // cstime...
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"%ld %llu %lu %ld " // itrealvalue...
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"%lu %lu %lu %lu " // rsslim...
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"%lu %lu %lu %lu " // kstkesp...
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"%lu %lu %lu %lu " // sigignore...
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"%lu %d %d %u " // cnswap...
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"%u %llu %lu %ld", // policy...
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0, "exe", 'R', 0, // pid...
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0, 0, 0, 0, // pgrp...
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0, 0L, 0L, 0L, // flags...
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0L, 0L, 0L, 0L, // cmajflt...
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0L, 0L, 0L, 0L, // cstime...
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0L, 0LL, 0L, 0L, // itrealvalue...
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0L, 0L, 0L, 0L, // rsslim...
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0L, 0L, 0L, 0L, // kstkesp...
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0L, 0L, 0L, 0L, // sigignore...
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0L, 0, proc->cpu_id, 0, // cnswap...
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0, 0LL, 0L, 0L // policy...
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);
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/* The target process has gone by migration. */
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r->newcpu = proc->cpu_id;
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process_unlock(savelock, irqstate);
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eof = 1;
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dprintf("buf=%s\n", buf);
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goto end;
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}
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else{
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dprintf("no thread found pid=%d tid=%d\n", pid, tid);
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}
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}
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dprintf("could not find a matching entry for task/%d/%s.\n", tid, p);
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goto end;
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}
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