[lldb/Scripts] Move android script from underneath Python dir

The scripts root directory already contains python scripts. No need to
keep this one nested under a dedicated Python directory.

1 files changed, 239 insertions, 0 deletions

diff --git a/lldb/scripts/android/host_art_bt.py b/lldb/scripts/android/host_art_bt.py
new file mode 100644
index 00000000000..b4e9d7e3027
--- /dev/null
+++ b/lldb/scripts/android/host_art_bt.py
@@ -0,0 +1,239 @@
+# Usage:
+#   art/test/run-test --host --gdb [--64] [--interpreter] 004-JniTest
+#   'b Java_Main_shortMethod'
+#   'r'
+#   'command script import host_art_bt.py'
+#   'host_art_bt'
+
+from __future__ import print_function
+
+import sys
+import re
+
+import lldb
+
+
+def host_art_bt(debugger, command, result, internal_dict):
+    prettified_frames = []
+    lldb_frame_index = 0
+    art_frame_index = 0
+    target = debugger.GetSelectedTarget()
+    process = target.GetProcess()
+    thread = process.GetSelectedThread()
+    while lldb_frame_index < thread.GetNumFrames():
+        frame = thread.GetFrameAtIndex(lldb_frame_index)
+        if frame.GetModule() and re.match(r'JIT\(.*?\)',
+                                          frame.GetModule().GetFileSpec().GetFilename()):
+            # Compiled Java frame
+
+            # Get function/filename/lineno from symbol context
+            symbol = frame.GetSymbol()
+            if not symbol:
+                print('No symbol info for compiled Java frame: ', frame)
+                sys.exit(1)
+            line_entry = frame.GetLineEntry()
+            prettified_frames.append({
+                'function': symbol.GetName(),
+                'file': str(line_entry.GetFileSpec()) if line_entry else None,
+                'line': line_entry.GetLine() if line_entry else -1
+            })
+
+            # Skip art frames
+            while True:
+                art_stack_visitor = frame.EvaluateExpression(
+                    """struct GetStackVisitor : public StackVisitor { GetStackVisitor(int depth_) : StackVisitor(Thread::Current(), NULL), depth(depth_) {} bool VisitFrame() { if (cur_depth_ == depth) { return false; } else { return true; } } int depth; }; GetStackVisitor visitor(""" +
+                    str(art_frame_index) +
+                    """); visitor.WalkStack(true); visitor""")
+                art_method = frame.EvaluateExpression(
+                    art_stack_visitor.GetName() + """.GetMethod()""")
+                if art_method.GetValueAsUnsigned() != 0:
+                    art_method_name = frame.EvaluateExpression(
+                        """art::PrettyMethod(""" + art_method.GetName() + """, true)""")
+                    art_method_name_data = frame.EvaluateExpression(
+                        art_method_name.GetName() + """.c_str()""").GetValueAsUnsigned()
+                    art_method_name_size = frame.EvaluateExpression(
+                        art_method_name.GetName() + """.length()""").GetValueAsUnsigned()
+                    error = lldb.SBError()
+                    art_method_name = process.ReadCStringFromMemory(
+                        art_method_name_data, art_method_name_size + 1, error)
+                    if not error.Success:
+                        print('Failed to read method name')
+                        sys.exit(1)
+                    if art_method_name != symbol.GetName():
+                        print('Function names in native symbol and art runtime stack do not match: ', symbol.GetName(), ' != ', art_method_name)
+                    art_frame_index = art_frame_index + 1
+                    break
+                art_frame_index = art_frame_index + 1
+
+            # Skip native frames
+            lldb_frame_index = lldb_frame_index + 1
+            if lldb_frame_index < thread.GetNumFrames():
+                frame = thread.GetFrameAtIndex(lldb_frame_index)
+                if frame.GetModule() and re.match(
+                        r'JIT\(.*?\)', frame.GetModule().GetFileSpec().GetFilename()):
+                    # Another compile Java frame
+                    # Don't skip; leave it to the next iteration
+                    continue
+                elif frame.GetSymbol() and (frame.GetSymbol().GetName() == 'art_quick_invoke_stub' or frame.GetSymbol().GetName() == 'art_quick_invoke_static_stub'):
+                    # art_quick_invoke_stub / art_quick_invoke_static_stub
+                    # Skip until we get past the next ArtMethod::Invoke()
+                    while True:
+                        lldb_frame_index = lldb_frame_index + 1
+                        if lldb_frame_index >= thread.GetNumFrames():
+                            print('ArtMethod::Invoke not found below art_quick_invoke_stub/art_quick_invoke_static_stub')
+                            sys.exit(1)
+                        frame = thread.GetFrameAtIndex(lldb_frame_index)
+                        if frame.GetSymbol() and frame.GetSymbol().GetName(
+                        ) == 'art::mirror::ArtMethod::Invoke(art::Thread*, unsigned int*, unsigned int, art::JValue*, char const*)':
+                            lldb_frame_index = lldb_frame_index + 1
+                            break
+                else:
+                    print('Invalid frame below compiled Java frame: ', frame)
+        elif frame.GetSymbol() and frame.GetSymbol().GetName() == 'art_quick_generic_jni_trampoline':
+            # Interpreted JNI frame for x86_64
+
+            # Skip art frames
+            while True:
+                art_stack_visitor = frame.EvaluateExpression(
+                    """struct GetStackVisitor : public StackVisitor { GetStackVisitor(int depth_) : StackVisitor(Thread::Current(), NULL), depth(depth_) {} bool VisitFrame() { if (cur_depth_ == depth) { return false; } else { return true; } } int depth; }; GetStackVisitor visitor(""" +
+                    str(art_frame_index) +
+                    """); visitor.WalkStack(true); visitor""")
+                art_method = frame.EvaluateExpression(
+                    art_stack_visitor.GetName() + """.GetMethod()""")
+                if art_method.GetValueAsUnsigned() != 0:
+                    # Get function/filename/lineno from ART runtime
+                    art_method_name = frame.EvaluateExpression(
+                        """art::PrettyMethod(""" + art_method.GetName() + """, true)""")
+                    art_method_name_data = frame.EvaluateExpression(
+                        art_method_name.GetName() + """.c_str()""").GetValueAsUnsigned()
+                    art_method_name_size = frame.EvaluateExpression(
+                        art_method_name.GetName() + """.length()""").GetValueAsUnsigned()
+                    error = lldb.SBError()
+                    function = process.ReadCStringFromMemory(
+                        art_method_name_data, art_method_name_size + 1, error)
+
+                    prettified_frames.append({
+                        'function': function,
+                        'file': None,
+                        'line': -1
+                    })
+
+                    art_frame_index = art_frame_index + 1
+                    break
+                art_frame_index = art_frame_index + 1
+
+            # Skip native frames
+            lldb_frame_index = lldb_frame_index + 1
+            if lldb_frame_index < thread.GetNumFrames():
+                frame = thread.GetFrameAtIndex(lldb_frame_index)
+                if frame.GetSymbol() and (frame.GetSymbol().GetName() ==
+                                          'art_quick_invoke_stub' or frame.GetSymbol().GetName() == 'art_quick_invoke_static_stub'):
+                    # art_quick_invoke_stub / art_quick_invoke_static_stub
+                    # Skip until we get past the next ArtMethod::Invoke()
+                    while True:
+                        lldb_frame_index = lldb_frame_index + 1
+                        if lldb_frame_index >= thread.GetNumFrames():
+                            print('ArtMethod::Invoke not found below art_quick_invoke_stub/art_quick_invoke_static_stub')
+                            sys.exit(1)
+                        frame = thread.GetFrameAtIndex(lldb_frame_index)
+                        if frame.GetSymbol() and frame.GetSymbol().GetName(
+                        ) == 'art::mirror::ArtMethod::Invoke(art::Thread*, unsigned int*, unsigned int, art::JValue*, char const*)':
+                            lldb_frame_index = lldb_frame_index + 1
+                            break
+                else:
+                    print('Invalid frame below compiled Java frame: ', frame)
+        elif frame.GetSymbol() and re.search(r'art::interpreter::', frame.GetSymbol().GetName()):
+            # Interpreted Java frame
+
+            while True:
+                lldb_frame_index = lldb_frame_index + 1
+                if lldb_frame_index >= thread.GetNumFrames():
+                    print('art::interpreter::Execute not found in interpreter frame')
+                    sys.exit(1)
+                frame = thread.GetFrameAtIndex(lldb_frame_index)
+                if frame.GetSymbol() and frame.GetSymbol().GetName(
+                ) == 'art::interpreter::Execute(art::Thread*, art::MethodHelper&, art::DexFile::CodeItem const*, art::ShadowFrame&, art::JValue)':
+                    break
+
+            # Skip art frames
+            while True:
+                art_stack_visitor = frame.EvaluateExpression(
+                    """struct GetStackVisitor : public StackVisitor { GetStackVisitor(int depth_) : StackVisitor(Thread::Current(), NULL), depth(depth_) {} bool VisitFrame() { if (cur_depth_ == depth) { return false; } else { return true; } } int depth; }; GetStackVisitor visitor(""" +
+                    str(art_frame_index) +
+                    """); visitor.WalkStack(true); visitor""")
+                art_method = frame.EvaluateExpression(
+                    art_stack_visitor.GetName() + """.GetMethod()""")
+                if art_method.GetValueAsUnsigned() != 0:
+                    # Get function/filename/lineno from ART runtime
+                    art_method_name = frame.EvaluateExpression(
+                        """art::PrettyMethod(""" + art_method.GetName() + """, true)""")
+                    art_method_name_data = frame.EvaluateExpression(
+                        art_method_name.GetName() + """.c_str()""").GetValueAsUnsigned()
+                    art_method_name_size = frame.EvaluateExpression(
+                        art_method_name.GetName() + """.length()""").GetValueAsUnsigned()
+                    error = lldb.SBError()
+                    function = process.ReadCStringFromMemory(
+                        art_method_name_data, art_method_name_size + 1, error)
+
+                    line = frame.EvaluateExpression(
+                        art_stack_visitor.GetName() +
+                        """.GetMethod()->GetLineNumFromDexPC(""" +
+                        art_stack_visitor.GetName() +
+                        """.GetDexPc(true))""").GetValueAsUnsigned()
+
+                    file_name = frame.EvaluateExpression(
+                        art_method.GetName() + """->GetDeclaringClassSourceFile()""")
+                    file_name_data = file_name.GetValueAsUnsigned()
+                    file_name_size = frame.EvaluateExpression(
+                        """(size_t)strlen(""" + file_name.GetName() + """)""").GetValueAsUnsigned()
+                    error = lldb.SBError()
+                    file_name = process.ReadCStringFromMemory(
+                        file_name_data, file_name_size + 1, error)
+                    if not error.Success():
+                        print('Failed to read source file name')
+                        sys.exit(1)
+
+                    prettified_frames.append({
+                        'function': function,
+                        'file': file_name,
+                        'line': line
+                    })
+
+                    art_frame_index = art_frame_index + 1
+                    break
+                art_frame_index = art_frame_index + 1
+
+            # Skip native frames
+            while True:
+                lldb_frame_index = lldb_frame_index + 1
+                if lldb_frame_index >= thread.GetNumFrames():
+                    print('Can not get past interpreter native frames')
+                    sys.exit(1)
+                frame = thread.GetFrameAtIndex(lldb_frame_index)
+                if frame.GetSymbol() and not re.search(
+                        r'art::interpreter::', frame.GetSymbol().GetName()):
+                    break
+        else:
+            # Other frames. Add them as-is.
+            frame = thread.GetFrameAtIndex(lldb_frame_index)
+            lldb_frame_index = lldb_frame_index + 1
+            if frame.GetModule():
+                module_name = frame.GetModule().GetFileSpec().GetFilename()
+                if not module_name in [
+                    'libartd.so',
+                    'dalvikvm32',
+                    'dalvikvm64',
+                        'libc.so.6']:
+                    prettified_frames.append({
+                        'function': frame.GetSymbol().GetName() if frame.GetSymbol() else None,
+                        'file': str(frame.GetLineEntry().GetFileSpec()) if frame.GetLineEntry() else None,
+                        'line': frame.GetLineEntry().GetLine() if frame.GetLineEntry() else -1
+                    })
+
+    for prettified_frame in prettified_frames:
+        print(prettified_frame['function'], prettified_frame['file'], prettified_frame['line'])
+
+
+def __lldb_init_module(debugger, internal_dict):
+    debugger.HandleCommand(
+        'command script add -f host_art_bt.host_art_bt host_art_bt')