mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-10-09 16:34:44 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 17

bpo-40222: "Zero cost" exception handling (GH-25729)

Browse source 
"Zero cost" exception handling.

* Uses a lookup table to determine how to handle exceptions.
* Removes SETUP_FINALLY and POP_TOP block instructions, eliminating (most of) the runtime overhead of try statements.
* Reduces the size of the frame object by about 60%.
This commit is contained in:
Mark Shannon 2021-05-07 15:19:19 +01:00 • committed by GitHub
parent b32c8e9795
commit adcd220556
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
30 changed files with 6614 additions and 5687 deletions
Download patch file Download diff file Expand all files Collapse all files

14
Python/opcode_targets.h generated
View file

@ -34,9 +34,9 @@ static void *opcode_targets[256] = {
&&TARGET_MATCH_SEQUENCE,
&&TARGET_MATCH_KEYS,
&&TARGET_COPY_DICT_WITHOUT_KEYS,
&&TARGET_PUSH_EXC_INFO,
&&_unknown_opcode,
&&_unknown_opcode,
&&_unknown_opcode,
&&TARGET_POP_EXCEPT_AND_RERAISE,
&&_unknown_opcode,
&&_unknown_opcode,
&&_unknown_opcode,
@ -52,7 +52,7 @@ static void *opcode_targets[256] = {
&&TARGET_GET_AITER,
&&TARGET_GET_ANEXT,
&&TARGET_BEFORE_ASYNC_WITH,
&&_unknown_opcode,
&&TARGET_BEFORE_WITH,
&&TARGET_END_ASYNC_FOR,
&&TARGET_INPLACE_ADD,
&&TARGET_INPLACE_SUBTRACT,
@ -86,7 +86,7 @@ static void *opcode_targets[256] = {
&&TARGET_IMPORT_STAR,
&&TARGET_SETUP_ANNOTATIONS,
&&TARGET_YIELD_VALUE,
&&TARGET_POP_BLOCK,
&&_unknown_opcode,
&&_unknown_opcode,
&&TARGET_POP_EXCEPT,
&&TARGET_STORE_NAME,
@ -121,7 +121,7 @@ static void *opcode_targets[256] = {
&&TARGET_RERAISE,
&&_unknown_opcode,
&&TARGET_JUMP_IF_NOT_EXC_MATCH,
&&TARGET_SETUP_FINALLY,
&&_unknown_opcode,
&&_unknown_opcode,
&&TARGET_LOAD_FAST,
&&TARGET_STORE_FAST,
@ -142,7 +142,7 @@ static void *opcode_targets[256] = {
&&_unknown_opcode,
&&TARGET_CALL_FUNCTION_KW,
&&TARGET_CALL_FUNCTION_EX,
&&TARGET_SETUP_WITH,
&&_unknown_opcode,
&&TARGET_EXTENDED_ARG,
&&TARGET_LIST_APPEND,
&&TARGET_SET_ADD,
@ -153,7 +153,7 @@ static void *opcode_targets[256] = {
&&_unknown_opcode,
&&TARGET_MATCH_CLASS,
&&_unknown_opcode,
&&TARGET_SETUP_ASYNC_WITH,
&&_unknown_opcode,
&&TARGET_FORMAT_VALUE,
&&TARGET_BUILD_CONST_KEY_MAP,
&&TARGET_BUILD_STRING,