Merge branch 'master' of github.com:cloudius-systems/osv

* 'master' of github.com:cloudius-systems/osv:
  gdb: pretty printers for libstdc++
  sched: start the reaper thread
  printf: reduce stack usage

core/sched.cc

@@ -445,6 +445,7 @@ private:
 detached_thread::reaper::reaper()
     : _mtx{}, _zombies{}, _thread([=] { reap(); })
 {
+    _thread.start();
 }
 
 void detached_thread::reaper::reap()

libc/stdio/vfprintf.c

@@ -9,7 +9,9 @@
 #include <math.h>
 #include <float.h>
 
-#define NL_ARGMAX _POSIX_ARG_MAX
+// FIXME: _POSIX_ARG_MAX is 4096, this causes a stack overflow
+//#define NL_ARGMAX _POSIX_ARG_MAX
+#define NL_ARGMAX 20
 
 /* Some useful macros */
 

libc/stdio/vfwprintf.c

@@ -8,7 +8,9 @@
 #include <wctype.h>
 #include <inttypes.h>
 
-#define NL_ARGMAX _POSIX_ARG_MAX
+// FIXME: _POSIX_ARG_MAX is 4096, this causes a stack overflow
+//#define NL_ARGMAX _POSIX_ARG_MAX
+#define NL_ARGMAX 20
 
 /* Convenient bit representation for modifier flags, which all fall
  * within 31 codepoints of the space character. */

scripts/loader.py

@@ -5,6 +5,7 @@ import re
 import os, os.path
 import struct
 import json
+from glob import glob
 
 build_dir = os.path.dirname(gdb.current_objfile().filename)
 external = build_dir + '/../../external'
@@ -307,6 +308,13 @@ def continue_handler(event):
 
 gdb.events.cont.connect(continue_handler)
 
+def setup_libstdcxx():
+    gcc = external + '/gcc.bin'
+    sys.path += [gcc + '/usr/share/gdb/auto-load/usr/lib64',
+                 glob(gcc + '/usr/share/gcc-*/python')[0],
+                 ]
+    main = glob(gcc + '/usr/share/gdb/auto-load/usr/lib64/libstdc++.so.*.py')[0]
+    execfile(main)
 
 osv()
 osv_heap()
@@ -315,4 +323,6 @@ osv_info()
 osv_info_threads()
 osv_thread()
 osv_thread_apply()
-osv_thread_apply_all()
\ No newline at end of file
+osv_thread_apply_all()
+
+setup_libstdcxx()