Updated the disassembler stress tester with two

new features:

(1) it outputs the instruction currently being
    tested to a log file, if a path is provided

(2) if instructed, it prints the time remaining
    in the exhaustive test

llvm-svn: 154205

lldb/examples/python/disasm-stress-test.py

@@ -1,8 +1,6 @@
 #!/usr/bin/python
 
-import argparse, re, subprocess, sys
-
-#-- This code fragment loads LLDB --
+import argparse, datetime, re, subprocess, sys, time
 
 def AddLLDBToSysPathOnMacOSX():
     def GetLLDBFrameworkPath():
@@ -25,8 +23,6 @@ AddLLDBToSysPathOnMacOSX()
 
 import lldb
 
-#-- End of code fragment that loads LLDB --
-
 parser = argparse.ArgumentParser(description="Run an exhaustive test of the LLDB disassembler for a specific architecture.")
 
 parser.add_argument('--arch', required=True, action='store', help='The architecture whose disassembler is to be tested')
@@ -34,6 +30,8 @@ parser.add_argument('--bytes', required=True, action='store', type=int, help='Th
 parser.add_argument('--random', required=False, action='store_true', help='Enables non-sequential testing')
 parser.add_argument('--start', required=False, action='store', type=int, help='The first instruction value to test')
 parser.add_argument('--skip', required=False, action='store', type=int, help='The interval between instructions to test')
+parser.add_argument('--log', required=False, action='store', help='A log file to write the most recent instruction being tested')
+parser.add_argument('--time', required=False, action='store_true', help='Every 100,000 instructions, print an ETA to standard out')
 
 arguments = sys.argv[1:]
 
@@ -51,24 +49,39 @@ if target.IsValid() == False:
     print "Couldn't create an SBTarget for architecture " + arg_ns.arch
     sys.exit(-1)
 
+def ResetLogFile(log_file):
+    if log_file != sys.stdout:
+        log_file.seek(0)
+        log_file.truncate(0)
+
+def PrintByteArray(log_file, byte_array):
+    for byte in byte_array:
+        print >>log_file, hex(byte) + " ",
+    print >>log_file
+    
 class SequentialInstructionProvider:
-    def __init__(self, byte_width, start=0, skip=1):
+    def __init__(self, byte_width, log_file, start=0, skip=1):
         self.m_byte_width = byte_width
+        self.m_log_file = log_file
         self.m_start = start
         self.m_skip = skip
         self.m_value = start
         self.m_last = (1 << (byte_width * 8)) - 1
+    def PrintCurrentState(self, ret):
+        ResetLogFile(self.m_log_file)
+        print >>self.m_log_file, self.m_value
+        PrintByteArray(self.m_log_file, ret)
     def GetNextInstruction(self):
-        # Print current state
-        print self.m_value
-        # Done printing current state
         if self.m_value > self.m_last:
             return None
         ret = bytearray(self.m_byte_width)
         for i in range(self.m_byte_width):
             ret[self.m_byte_width - (i + 1)] = (self.m_value >> (i * 8)) & 255 
+        self.PrintCurrentState(ret)
         self.m_value += self.m_skip
         return ret
+    def GetNumInstructions(self):
+        return self.m_last / self.m_skip
     def __iter__(self):
         return self
     def next(self):
@@ -78,18 +91,18 @@ class SequentialInstructionProvider:
         return ret
 
 class RandomInstructionProvider:
-    def __init__(self, byte_width):
+    def __init__(self, byte_width, log_file):
         self.m_byte_width = byte_width
+        self.m_log_file = log_file
         self.m_random_file = open("/dev/random", 'r')
+    def PrintCurrentState(self, ret):
+        ResetLogFile(self.m_log_file)
+        PrintByteArray(self.m_log_file, ret)
     def GetNextInstruction(self):
         ret = bytearray(self.m_byte_width)
         for i in range(self.m_byte_width):
             ret[i] = self.m_random_file.read(1)
-        # Print current state
-        for ret_byte in ret:
-            print hex(ret_byte) + " ",
-        print
-        # Done printing current state
+        self.PrintCurrentState(ret)
         return ret
     def __iter__(self):
         return self
@@ -99,10 +112,17 @@ class RandomInstructionProvider:
             raise StopIteration
         return ret
 
+log_file = None
+
 def GetProviderWithArguments(args):
+    global log_file
+    if args.log != None:
+        log_file = open(args.log, 'w')
+    else:
+        log_file = sys.stdout
     instruction_provider = None
     if args.random == True:
-        instruction_provider = RandomInstructionProvider(args.bytes)
+        instruction_provider = RandomInstructionProvider(args.bytes, log_file)
     else:
         start = 0
         skip = 1
@@ -110,22 +130,36 @@ def GetProviderWithArguments(args):
             start = args.start
         if args.skip != None:
             skip = args.skip
-        instruction_provider = SequentialInstructionProvider(args.bytes, start, skip)
+        instruction_provider = SequentialInstructionProvider(args.bytes, log_file, start, skip)
     return instruction_provider
 
 instruction_provider = GetProviderWithArguments(arg_ns)
 
 fake_address = lldb.SBAddress()
 
+actually_time = arg_ns.time and not arg_ns.random
+
+if actually_time:
+    num_instructions_logged = 0
+    total_num_instructions = instruction_provider.GetNumInstructions()
+    start_time = time.time()
+
 for inst_bytes in instruction_provider:
+    if actually_time:
+        if (num_instructions_logged != 0) and (num_instructions_logged % 100000 == 0):
+            curr_time = time.time()
+            elapsed_time = curr_time - start_time
+            remaining_time = float(total_num_instructions - num_instructions_logged) * (float(elapsed_time) / float(num_instructions_logged))
+            print str(datetime.timedelta(seconds=remaining_time))
+        num_instructions_logged = num_instructions_logged + 1
     inst_list = target.GetInstructions(fake_address, inst_bytes)
     if not inst_list.IsValid():
-        print "Invalid instruction list"
+        print >>log_file, "Invalid instruction list"
         continue
     inst = inst_list.GetInstructionAtIndex(0)
     if not inst.IsValid():
-        print "Invalid instruction"
+        print >>log_file, "Invalid instruction"
         continue
     instr_output_stream = lldb.SBStream()
     inst.GetDescription(instr_output_stream)
-    print instr_output_stream.GetData()
+    print >>log_file, instr_output_stream.GetData()