dumpstate: Add blocked process wait-channel info to bugreport
Fix for http://b/2630027
Change-Id: I3606d8bf95c58df2b290dbd13f48538d82f16088
Signed-off-by: San Mehat <san@google.com>
diff --git a/cmds/dumpstate/utils.c b/cmds/dumpstate/utils.c
index c21dace..c7a78cc 100644
--- a/cmds/dumpstate/utils.c
+++ b/cmds/dumpstate/utils.c
@@ -37,6 +37,64 @@
#include "dumpstate.h"
+void for_each_pid(void (*func)(int, const char *), const char *header) {
+ DIR *d;
+ struct dirent *de;
+
+ if (!(d = opendir("/proc"))) {
+ printf("Failed to open /proc (%s)\n", strerror(errno));
+ return;
+ }
+
+ printf("\n------ %s ------\n", header);
+ while ((de = readdir(d))) {
+ int pid;
+ int fd;
+ char cmdpath[255];
+ char cmdline[255];
+
+ if (!(pid = atoi(de->d_name))) {
+ continue;
+ }
+
+ sprintf(cmdpath,"/proc/%d/cmdline", pid);
+ memset(cmdline, 0, sizeof(cmdline));
+ if ((fd = open(cmdpath, O_RDONLY)) < 0) {
+ strcpy(cmdline, "N/A");
+ } else {
+ read(fd, cmdline, sizeof(cmdline));
+ close(fd);
+ }
+ func(pid, cmdline);
+ }
+
+ closedir(d);
+}
+
+void show_wchan(int pid, const char *name) {
+ char path[255];
+ char buffer[255];
+ int fd;
+
+ memset(buffer, 0, sizeof(buffer));
+
+ sprintf(path, "/proc/%d/wchan", pid);
+ if ((fd = open(path, O_RDONLY)) < 0) {
+ printf("Failed to open '%s' (%s)\n", path, strerror(errno));
+ return;
+ }
+
+ if (read(fd, buffer, sizeof(buffer)) < 0) {
+ printf("Failed to read '%s' (%s)\n", path, strerror(errno));
+ goto out_close;
+ }
+
+ printf("%-7d %-32s %s\n", pid, name, buffer);
+
+out_close:
+ close(fd);
+ return;
+}
/* prints the contents of a file */
int dump_file(const char *title, const char* path) {