# 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'
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")
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