主要有两个坑
1.XXXSLICE相关的opcode
#define SLICE #define SLICE_1 #define SLICE_2 #define SLICE_3 #define STORE_SLICE #define STORE_SLICE_1 #define STORE_SLICE_2 #define STORE_SLICE_3 #define DELETE_SLICE #define DELETE_SLICE_1 #define DELETE_SLICE_2 #define DELETE_SLICE_3
由于编译和运行的时候,这些宏定义是连续的,所以python源代码中会以SLICE+1,opcode - SLICE & 1等方式进行操作
如果置换的时候不连续,就会出问题
2.CALL_FUNCTIONXXX相关的opcode
/* The next 3 opcodes must be contiguous and satisfy (CALL_FUNCTION_VAR - CALL_FUNCTION) & 3 == 1 */ #define CALL_FUNCTION_VAR /* #args + (#kwargs<<8) */ #define CALL_FUNCTION_KW /* #args + (#kwargs<<8) */ #define CALL_FUNCTION_VAR_KW /* #args + (#kwargs<<8) */
与1问题类似,ceval.c中出现(opcode - CALL_FUNCTION) & 3,所以也必须保证(CALL_FUNCTION_VAR - CALL_FUNCTION) & 3 == 1,且这三个宏连续