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lldb: add pretty printer for InternPool.Local.List

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This commit is contained in:
Jacob Young 2024-12-16 05:11:10 -05:00
parent 1983adb8ae
commit 5af7404655
1 changed files with 37 additions and 0 deletions
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37
tools/lldb_pretty_printers.py
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@ -7,10 +7,28 @@
import lldb
import re
# Helpers
page_size = 1 << 12
def log2_int(i): return i.bit_length() - 1
def create_struct(name, struct_type, **inits):
struct_bytes = bytearray(struct_type.size)
struct_data = lldb.SBData()
for field in struct_type.fields:
field_size = field.type.size
field_bytes = inits[field.name].data.uint8[:field_size]
match struct_data.byte_order:
case lldb.eByteOrderLittle:
field_start = field.byte_offset
struct_bytes[field_start:field_start + len(field_bytes)] = field_bytes
case lldb.eByteOrderBig:
field_end = field.byte_offset + field_size
struct_bytes[field_end - len(field_bytes):field_end] = field_bytes
struct_data.SetData(lldb.SBError(), struct_bytes, struct_data.byte_order, struct_data.GetAddressByteSize())
return next(iter(inits.values())).CreateValueFromData(name, struct_data, struct_type)
# Define Zig Language
zig_keywords = {
@ -678,6 +696,22 @@ value_tag_handlers = {
'lazy_size': lambda payload: '@sizeOf(%s)' % type_Type_SummaryProvider(payload),
}
# Define Zig Stage2 Compiler (compiled with the self-hosted backend)
class root_InternPool_Local_List_SynthProvider:
def __init__(self, value, _=None): self.value = value
def update(self):
capacity = self.value.EvaluateExpression('@as(*@This().Header, @alignCast(@ptrCast(@this().bytes - @This().bytes_offset))).capacity')
self.view = create_struct('view', self.value.EvaluateExpression('@This().View').GetValueAsType(), bytes=self.value.GetChildMemberWithName('bytes'), len=capacity, capacity=capacity).GetNonSyntheticValue()
def has_children(self): return True
def num_children(self): return 1
def get_child_index(self, name):
try: return ('view',).index(name)
except: pass
def get_child_at_index(self, index):
try: return (self.view,)[index]
except: pass
# Initialize
def add(debugger, *, category, regex=False, type, identifier=None, synth=False, inline_children=False, expand=False, summary=False):
@ -729,3 +763,6 @@ def __lldb_init_module(debugger, _=None):
add(debugger, category='zig.stage2', type='InternPool.Key.Ptr.Addr', identifier='zig_TaggedUnion', synth=True)
add(debugger, category='zig.stage2', type='InternPool.Key.Aggregate.Storage', identifier='zig_TaggedUnion', synth=True)
add(debugger, category='zig.stage2', type='arch.x86_64.CodeGen.MCValue', identifier='zig_TaggedUnion', synth=True, inline_children=True, summary=True)
# Initialize Zig Stage2 Compiler (compiled with the self-hosted backend)
add(debugger, category='zig', regex=True, type='^root\\.InternPool\\.Local\\.List\\(.*\\)$', identifier='root_InternPool_Local_List', synth=True, expand=True, summary='capacity=${var%#}')