mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-25 03:04:55 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 6

co_lnotab supports negative line number delta

Browse source 
Issue #26107: The format of the co_lnotab attribute of code objects changes to
support negative line number delta.

Changes:

* assemble_lnotab(): if line number delta is less than -128 or greater than
  127, emit multiple (offset_delta, lineno_delta) in co_lnotab
* update functions decoding co_lnotab to use signed 8-bit integers

  - dis.findlinestarts()
  - PyCode_Addr2Line()
  - _PyCode_CheckLineNumber()
  - frame_setlineno()

* update lnotab_notes.txt
* increase importlib MAGIC_NUMBER to 3361
* document the change in What's New in Python 3.6
* cleanup also PyCode_Optimize() to use better variable names
This commit is contained in:
Victor Stinner 2016-01-20 12:16:21 +01:00
parent 316fcc867b
commit f3914eb16d
11 changed files with 203 additions and 161 deletions
Download patch file Download diff file Expand all files Collapse all files

11
Objects/codeobject.c
View file

@ -557,7 +557,8 @@ PyCode_Addr2Line(PyCodeObject *co, int addrq)
addr += *p++;
if (addr > addrq)
break;
line += *p++;
line += (signed char)*p;
p++;
}
return line;
}
@ -592,17 +593,19 @@ _PyCode_CheckLineNumber(PyCodeObject* co, int lasti, PyAddrPair *bounds)
if (addr + *p > lasti)
break;
addr += *p++;
if (*p)
if ((signed char)*p)
bounds->ap_lower = addr;
line += *p++;
line += (signed char)*p;
p++;
--size;
}
if (size > 0) {
while (--size >= 0) {
addr += *p++;
if (*p++)
if ((signed char)*p)
break;
p++;
}
bounds->ap_upper = addr;
}