Author: Armin Rigo <[email protected]>
Branch:
Changeset: r68308:07f0c7c1a7ca
Date: 2013-11-24 15:21 +0100
http://bitbucket.org/pypy/pypy/changeset/07f0c7c1a7ca/
Log: A workaround against passing huge numbers or huge strings on 64-bit
machines
diff --git a/rpython/rlib/rdtoa.py b/rpython/rlib/rdtoa.py
--- a/rpython/rlib/rdtoa.py
+++ b/rpython/rlib/rdtoa.py
@@ -38,6 +38,10 @@
],
)
+# dtoa.c is limited to 'int', so we refuse to pass it
+# strings or integer arguments bigger than ~2GB
+_INT_LIMIT = 0x7ffff000
+
dg_strtod = rffi.llexternal(
'_PyPy_dg_strtod', [rffi.CCHARP, rffi.CCHARPP], rffi.DOUBLE,
compilation_info=eci, sandboxsafe=True)
@@ -52,6 +56,8 @@
compilation_info=eci, sandboxsafe=True)
def strtod(input):
+ if len(input) > _INT_LIMIT:
+ raise MemoryError
end_ptr = lltype.malloc(rffi.CCHARPP.TO, 1, flavor='raw')
try:
ll_input = rffi.str2charp(input)
@@ -232,6 +238,8 @@
def dtoa(value, code='r', mode=0, precision=0, flags=0,
special_strings=lower_special_strings, upper=False):
+ if precision > _INT_LIMIT:
+ raise MemoryError
decpt_ptr = lltype.malloc(rffi.INTP.TO, 1, flavor='raw')
try:
sign_ptr = lltype.malloc(rffi.INTP.TO, 1, flavor='raw')
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