Add Delve script to dump buffers (for debugging)

Author: vitalif

contrib/dump-bufs.star

@@ -0,0 +1,20 @@
+# Delve (https://github.com/go-delve/delve) script to dump all GeeseFS file buffer states
+def main():
+    # Like inodes = eval(None, "fs.inodes").Variable in the Flusher goroutine
+    inodes = None
+    for g in goroutines().Goroutines:
+        s = stacktrace(g.ID, 100)
+        i = 0
+        for l in s.Locations:
+            if l.Location.Function.Name_.endswith('.Flusher'):
+                inodes = eval({ "GoroutineID": g.ID, "Frame": i }, "fs.inodes").Variable
+                break
+            i = i+1
+    if not inodes:
+        return
+    for id in inodes.Value:
+        inode = inodes.Value[id]
+        if len(inode.buffers) > 0:
+            print(inode.Name)
+            for buf in inode.buffers:
+                print(buf.offset, " ", buf.length, " ", buf.state, " ", buf.loading, " ", buf.zero, " ", buf.recency, " ", buf.dirtyID, " ", buf.data != None)