From 4ace73b1f6e8c8d96663a0d8f0f1d61f934e9cb2 Mon Sep 17 00:00:00 2001 From: Rafael Antognolli Date: Fri, 31 Mar 2017 09:57:22 -0700 Subject: [PATCH] genxml: Fix python crash when no dwords are found. If the 'dwords' dict is empty, max(dwords.keys()) throws an exception. This case could happen when we have an instruction that is only an array of other structs, with variable length. v2: - Add another clause for empty dwords and make it work with python 3 (Dylan) - Set the length to 0 if dwords is empty, and do not declare dw Signed-off-by: Rafael Antognolli Reviewed-by: Dylan Baker Reviewed-by: Kenneth Graunke --- src/intel/genxml/gen_pack_header.py | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/src/intel/genxml/gen_pack_header.py b/src/intel/genxml/gen_pack_header.py index 81c64cb..1b1949f 100644 --- a/src/intel/genxml/gen_pack_header.py +++ b/src/intel/genxml/gen_pack_header.py @@ -347,7 +347,7 @@ class Group(object): dwords[index + 1] = dwords[index] index = index + 1 - def emit_pack_function(self): + def collect_dwords_and_length(self): dwords = {} self.collect_dwords(dwords, 0, "") @@ -357,9 +357,14 @@ class Group(object): # index we've seen plus one. if self.size > 0: length = self.size // 32 - else: + elif dwords: length = max(dwords.keys()) + 1 + else: + length = 0 + + return (dwords, length) + def emit_pack_function(self, dwords, length): for index in range(length): # Handle MBZ dwords if not index in dwords: @@ -576,10 +581,12 @@ class Parser(object): print("static inline void\n%s_pack(__gen_user_data *data, void * restrict dst,\n%sconst struct %s * restrict values)\n{" % (name, ' ' * (len(name) + 6), name)) - # Cast dst to make header C++ friendly - print(" uint32_t * restrict dw = (uint32_t * restrict) dst;") + (dwords, length) = group.collect_dwords_and_length() + if length: + # Cast dst to make header C++ friendly + print(" uint32_t * restrict dw = (uint32_t * restrict) dst;") - group.emit_pack_function() + group.emit_pack_function(dwords, length) print("}\n") -- 2.7.4