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"""
Support for valgrind: tell it when we patch code in-place.
"""
from rpython.rtyper.tool import rffi_platform
from rpython.rtyper.lltypesystem import lltype, llmemory, rffi
from rpython.translator.tool.cbuild import ExternalCompilationInfo
from rpython.rlib.objectmodel import we_are_translated
eci = ExternalCompilationInfo(includes = ['valgrind/valgrind.h'])
try:
rffi_platform.verify_eci(eci)
except rffi_platform.CompilationError:
VALGRIND_DISCARD_TRANSLATIONS = None
else:
VALGRIND_DISCARD_TRANSLATIONS = rffi.llexternal(
"VALGRIND_DISCARD_TRANSLATIONS",
[llmemory.Address, lltype.Signed],
lltype.Void,
compilation_info=eci,
_nowrapper=True,
sandboxsafe=True)
# ____________________________________________________________
def discard_translations(data, size):
if we_are_translated() and VALGRIND_DISCARD_TRANSLATIONS is not None:
VALGRIND_DISCARD_TRANSLATIONS(llmemory.cast_int_to_adr(data), size)
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