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field check in allocation pass

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varun-r-mallya
2025-11-21 20:50:40 +05:30
parent 9ee821c7f6
commit 11850d16d3
2 changed files with 14 additions and 12 deletions
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13
pythonbpf/expr/expr_pass.py
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@ -14,6 +14,7 @@ from .type_normalization import (
)
from pythonbpf.vmlinux_parser.assignment_info import Field
from .vmlinux_registry import VmlinuxHandlerRegistry
from ..vmlinux_parser.dependency_node import Field
logger: Logger = logging.getLogger(__name__)
@ -89,8 +90,16 @@ def _handle_attribute_expr(
return vmlinux_result
else:
raise RuntimeError("Vmlinux struct did not process successfully")
metadata = structs_sym_tab[var_metadata]
if attr_name in metadata.fields:
elif isinstance(var_metadata, Field):
logger.error(
f"Cannot access field '{attr_name}' on already-loaded field value '{var_name}'"
)
return None
# Regular user-defined struct
metadata = structs_sym_tab.get(var_metadata)
if metadata and attr_name in metadata.fields:
gep = metadata.gep(builder, var_ptr, attr_name)
val = builder.load(gep)
field_type = metadata.field_type(attr_name)