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Added options to specify how many instructions before and after the frame 

PC to disassemble. Users can also specify the frame depth to disassemble to
and also if disassembly should happen for all threads.

llvm-svn: 148627
This commit is contained in:
Greg Clayton 2012-01-21 05:10:20 +00:00
parent b7eac9fbef
commit bc48f32d0a
1 changed files with 26 additions and 13 deletions
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39
lldb/examples/python/crashlog.py
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@ -420,7 +420,7 @@ class CrashLog:
return None # success
return 'error: unable to locate any executables from the crash log'
def disassemble_instructions (instructions, pc, insts_before_pc, insts_after_pc):
def disassemble_instructions (instructions, pc, options, non_zeroeth_frame):
lines = list()
pc_index = -1
comment_column = 50
@ -440,11 +440,19 @@ def disassemble_instructions (instructions, pc, insts_before_pc, insts_after_pc)
lines[-1] += "; %s" % comment
if pc_index >= 0:
if pc_index >= insts_before_pc:
start_idx = pc_index - insts_before_pc
else:
# If we are disassembling the non-zeroeth frame, we need to backup the PC by 1
if non_zeroeth_frame and pc_index > 0:
pc_index = pc_index - 1
if options.disassemble_before == -1:
start_idx = 0
end_idx = pc_index + insts_after_pc
else:
start_idx = pc_index - options.disassemble_before
if start_idx < 0:
start_idx = 0
if options.disassemble_before == -1:
end_idx = inst_idx
else:
end_idx = pc_index + options.disassemble_after
if end_idx > inst_idx:
end_idx = inst_idx
for i in range(start_idx, end_idx+1):
@ -499,12 +507,16 @@ you to explore the program as if it were stopped at the locations described in t
be disassembled and lookups can be performed using the addresses found in the crash log.'''
parser = optparse.OptionParser(description=description, prog='crashlog.py',usage=usage)
parser.add_option('--platform', type='string', metavar='platform', dest='platform', help='specify one platform by name')
parser.add_option('--verbose', action='store_true', dest='verbose', help='display verbose debug info', default=False)
parser.add_option('-v', '--verbose', action='store_true', dest='verbose', help='display verbose debug info', default=False)
parser.add_option('--no-images', action='store_false', dest='show_images', help='don\'t show images in stack frames', default=True)
parser.add_option('--load-all', action='store_true', dest='load_all_images', help='load all executable images, not just the images found in the crashed stack frames', default=False)
parser.add_option('-a', '--load-all', action='store_true', dest='load_all_images', help='load all executable images, not just the images found in the crashed stack frames', default=False)
parser.add_option('--image-list', action='store_true', dest='dump_image_list', help='show image list', default=False)
parser.add_option('--debug-delay', type='int', dest='debug_delay', metavar='NSEC', help='pause for NSEC seconds for debugger', default=0)
parser.add_option('--crashed-only', action='store_true', dest='crashed_only', help='only symbolicate the crashed thread', default=False)
parser.add_option('-g', '--debug-delay', type='int', dest='debug_delay', metavar='NSEC', help='pause for NSEC seconds for debugger', default=0)
parser.add_option('-c', '--crashed-only', action='store_true', dest='crashed_only', help='only symbolicate the crashed thread', default=False)
parser.add_option('-d', '--disasm-depth', type='int', dest='disassemble_depth', help='set the depth in stack frames that should be disassembled (default is 1)', default=1)
parser.add_option('-D', '--disasm-all', action='store_true', dest='disassemble_all_threads', help='enabled disassembly of frames on all threads (not just the crashed thread)', default=False)
parser.add_option('-B', '--disasm-before', type='int', dest='disassemble_before', help='the number of instructions to disassemble before the frame PC', default=4)
parser.add_option('-A', '--disasm-after', type='int', dest='disassemble_after', help='the number of instructions to disassemble after the frame PC', default=4)
loaded_addresses = False
try:
(options, args) = parser.parse_args(command_args)
@ -652,6 +664,7 @@ be disassembled and lookups can be performed using the addresses found in the cr
line_entry = frame.sym_ctx.GetLineEntry()
symbol = frame.sym_ctx.GetSymbol()
inlined_block = block.GetContainingInlinedBlock();
disassemble = (this_thread_crashed or options.disassemble_all_threads) and frame_idx < options.disassemble_depth;
if inlined_block:
function_name = inlined_block.GetInlinedName();
block_range_idx = inlined_block.GetRangeIndexForBlockAddress (lldb.target.ResolveLoadAddress (frame.pc))
@ -660,17 +673,17 @@ be disassembled and lookups can be performed using the addresses found in the cr
function_start_load_addr = block_range_start_addr.GetLoadAddress (lldb.target)
else:
function_start_load_addr = frame.pc
if this_thread_crashed and frame_idx == 0:
if disassemble:
instructions = function.GetInstructions(lldb.target)
elif function:
function_name = function.GetName()
function_start_load_addr = function.GetStartAddress().GetLoadAddress (lldb.target)
if this_thread_crashed and frame_idx == 0:
if disassemble:
instructions = function.GetInstructions(lldb.target)
elif symbol:
function_name = symbol.GetName()
function_start_load_addr = symbol.GetStartAddress().GetLoadAddress (lldb.target)
if this_thread_crashed and frame_idx == 0:
if disassemble:
instructions = symbol.GetInstructions(lldb.target)
if function_name:
@ -708,7 +721,7 @@ be disassembled and lookups can be performed using the addresses found in the cr
prev_frame_index = frame.index
if instructions:
print
disassemble_instructions (instructions, frame.pc, 4, 4)
disassemble_instructions (instructions, frame.pc, options, frame.index > 0)
print
print