changes to procstat malloc behavior

src/blackjack/main.c

@@ -25,7 +25,7 @@ void print_status(procstat_status_t* proc)
 
 int main(int argc, char** argv)
 {
-    // test test
+    // map test
     {
         procstat_map_t* maps;
         size_t map_count;
@@ -64,14 +64,14 @@ int main(int argc, char** argv)
         if (procstat_get_threads(parent->pid, &threads, &thread_count))
         {
             fputs("failed to obtain process threads\n", stderr);
-            free(list);
+            procstat_free_status_list(list, count);
             return 1;
         }
 
         if (procstat_find_active(threads, thread_count, &active))
         {
             // no active threads - free list and continue
-            free(threads);
+            procstat_free_status_list(threads, thread_count);
             usleep(500*1000);
         }
         else
@@ -96,8 +96,8 @@ int main(int argc, char** argv)
     {
         fprintf(stderr, "failed to attach: %s\n", strerror(errno));
         
-        free(threads);
+        procstat_free_status_list(threads, thread_count);
-        free(list);
+        procstat_free_status_list(list, count);
         
         return 1;
     }
@@ -116,8 +116,8 @@ int main(int argc, char** argv)
 
     process_detach_all(threads, thread_count);
     
-    free(threads);
+    procstat_free_status_list(threads, thread_count);
-    free(list);
+    procstat_free_status_list(list, count);
     
     return 0;
 }

src/blackjack/procstat.c

@@ -25,6 +25,8 @@ int procstat_parse_status(pid_t pid, procstat_status_t* status)
 
     if (rd < 1) return 1;
 
+    memset(status, '\0', sizeof(procstat_status_t));
+
     char* lineptr = NULL, *line = strtok_r(buffer, "\n", &lineptr);
     while (line != NULL)
     {
@@ -33,7 +35,9 @@ int procstat_parse_status(pid_t pid, procstat_status_t* status)
         const char* value = (const char*)strtok_r(NULL, ":\t", &fieldptr);
 
         if (!strcmp(key, "Name"))
-            strncpy(status->name, value, MAX_PROCESS_NAME);
+        {
+            if (value) status->name = strdup(value);
+        }
         else if (!strcmp(key, "Umask"))
             status->umask = (unsigned int)strtoul(value, NULL, 8);
         else if (!strcmp(key, "State"))
@@ -59,6 +63,13 @@ int procstat_parse_status(pid_t pid, procstat_status_t* status)
     return 0;
 }
 
+void procstat_free_status_list(procstat_status_t* list, size_t count)
+{
+    for (unsigned i = 0; i < count; i++)
+        if (list[i].name) free(list[i].name);
+    free(list);
+}
+
 static int is_numeric(const char* str)
 {
     for (const char* p = str; *p; p++)
@@ -310,7 +321,7 @@ int procstat_parse_maps(pid_t pid, procstat_map_t** maps, size_t* count)
         // path
         if (pathname) map->path = strdup(pathname);
 
-        TRACE("map v_start %lx v_end %lx prot %x flags %x f_offset %x dev_major %u dev_minor %u inode %lu path %s\n",
+        TRACE("map v_start %lx v_end %lx prot %x flags %x f_offset %lx dev_major %u dev_minor %u inode %lu path %s\n",
             map->v_start, map->v_end,
             map->prot, map->flags,
             map->f_offset,

src/blackjack/procstat.h

@@ -15,9 +15,8 @@ typedef enum {
     ZOMBIE                  = 'Z'
 } procstat_state_t;
 
-#define MAX_PROCESS_NAME 256
 typedef struct {
-    char name[MAX_PROCESS_NAME];
+    char* name;
     mode_t umask;
     procstat_state_t state;
     pid_t tgid;
@@ -33,6 +32,9 @@ typedef struct {
 // error information obtain from errno
 int procstat_parse_status(pid_t pid, procstat_status_t* status);
 
+// free all procstat status list entries
+void procstat_free_status_list(procstat_status_t* list, size_t count);
+
 // find any process that matches name, case insensitive.
 // list pointer must point to NULL-initialized pointer, and count pointer must pount to initialized 0
 // will skip any process which status couldn't be parsed