From 9caeb606bfa87edc45a19c35e161782424748ebb Mon Sep 17 00:00:00 2001
From: winlin <winlin@vip.126.com>
Date: Thu, 10 Dec 2020 11:36:24 +0800
Subject: [PATCH] ST: Support show coroutines.

---
 trunk/gdb/srs.py | 64 +++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 52 insertions(+), 12 deletions(-)

diff --git a/trunk/gdb/srs.py b/trunk/gdb/srs.py
index 9bb71f597b..038012f050 100644
--- a/trunk/gdb/srs.py
+++ b/trunk/gdb/srs.py
@@ -1,30 +1,70 @@
-import gdb, sys, traceback;
+import gdb, traceback;
 
+'''
+Usage:
+    nn_coroutines
+    nn_coroutines 1000
+'''
 class NnCouroutines(gdb.Command):
     def __init__(self):
         super(NnCouroutines, self).__init__('nn_coroutines', gdb.COMMAND_DATA)
 
+    # https://sourceware.org/gdb/current/onlinedocs/gdb/Python-API.html#Python-API
     def invoke(self, arg, from_tty):
+        nn_interval=1000
+        nn_coroutines = 1
+        # Parse args.
+        args = arg.split(' ')
+        if args[0] != '':
+            nn_interval = int(args[0])
         try:
-            if len(arg) > 0:
-                prev = pthis = arg
-                print('start from %s'%(arg))
-            else:
-                prev = pthis = gdb.parse_and_eval('&_st_this_thread->tlink').__str__()
-                print('start from &_st_this_thread->tlink')
-            print('first is: %s'%(pthis))
-            nn_coroutines, pnext = 1, pthis
+            pnext = prev = pthis = gdb.parse_and_eval('&_st_this_thread->tlink').__str__()
+            print('interval: %s, first: %s, args(%s): %s'%(nn_interval, pthis, len(args), args))
             while True:
                 v = gdb.parse_and_eval('((_st_clist_t*)%s)->next'%pnext)
                 prev = pnext = str(v.__str__()).split(' ')[0]
                 if pnext == pthis:
                     break
                 nn_coroutines += 1
-                if len(arg) > 0 or (nn_coroutines%1000) == 0:
+                if (nn_coroutines%nn_interval) == 0:
                     print('next is %s, total %s'%(pnext, nn_coroutines))
-            print('total coroutines: %s'%(nn_coroutines))
         except:
             print('Error: prev=%s, this=%s, next=%s, v=%s'%(prev, pthis, pnext, v))
             traceback.print_exc()
+        # Result.
+        print('total coroutines: %s'%(nn_coroutines))
 
-NnCouroutines()
\ No newline at end of file
+NnCouroutines()
+
+'''
+Usage:
+    show_coroutines
+'''
+class ShowCouroutines(gdb.Command):
+    def __init__(self):
+        super(ShowCouroutines, self).__init__('show_coroutines', gdb.COMMAND_DATA)
+
+    # https://sourceware.org/gdb/current/onlinedocs/gdb/Python-API.html#Python-API
+    def invoke(self, arg, from_tty):
+        offset = gdb.parse_and_eval('(int)(&(((_st_thread_t*)(0))->tlink))').__str__()
+        _st_this_thread = gdb.parse_and_eval('_st_this_thread').__str__()
+        pnext = prev = pthis = gdb.parse_and_eval('&_st_this_thread->tlink').__str__()
+        this_thread2 = gdb.parse_and_eval('(_st_thread_t*)(%s - %s)'%(pthis, offset)).__str__()
+        #print('offset=%s, _st_this_thread=%s, pthis-offset=%s'%(offset, _st_this_thread, this_thread2))
+        try:
+            while True:
+                trd = gdb.parse_and_eval('(_st_thread_t*)(%s - %s)'%(pnext, offset)).__str__()
+                jmpbuf = gdb.parse_and_eval('((_st_thread_t*)%s)->context.__jmpbuf'%(trd)).__str__().split(', ')
+                rbp, rsp, crip = int(jmpbuf[1]), int(jmpbuf[6]), None
+                if rbp > 0 and rsp > 0:
+                    crip = gdb.execute('x/2xa %s'%(rbp), to_string=True).split('\t')[2].strip()
+                    print('thread: %s, caller: %s'%(trd, crip))
+                v = gdb.parse_and_eval('((_st_clist_t*)%s)->next'%pnext)
+                prev = pnext = str(v.__str__()).split(' ')[0]
+                if pnext == pthis:
+                    break
+        except:
+            print('Error: prev=%s, this=%s, next=%s'%(prev, pthis, pnext))
+            traceback.print_exc()
+
+ShowCouroutines()