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bpo-42246: Partial implementation of PEP 626. (GH-23113)

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* Implement new line number table format, as defined in PEP 626.
This commit is contained in:
Mark Shannon 2020-11-12 09:43:29 +00:00 • committed by GitHub
parent cda99b4022
commit 877df851c3
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GPG key ID: 4AEE18F83AFDEB23
19 changed files with 5364 additions and 5000 deletions
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36
Objects/frameobject.c
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@ -249,36 +249,22 @@ explain_incompatible_block_stack(int64_t to_stack)
static int *
marklines(PyCodeObject *code, int len)
{
PyCodeAddressRange bounds;
_PyCode_InitAddressRange(code, &bounds);
assert (bounds.ar_end == 0);
int *linestarts = PyMem_New(int, len);
if (linestarts == NULL) {
return NULL;
}
Py_ssize_t size = PyBytes_GET_SIZE(code->co_lnotab) / 2;
unsigned char *p = (unsigned char*)PyBytes_AS_STRING(code->co_lnotab);
int line = code->co_firstlineno;
int addr = 0;
int index = 0;
while (--size >= 0) {
addr += *p++;
if (index*2 < addr) {
linestarts[index++] = line;
}
while (index*2 < addr) {
linestarts[index++] = -1;
if (index >= len) {
break;
}
}
line += (signed char)*p;
p++;
for (int i = 0; i < len; i++) {
linestarts[i] = -1;
}
if (index < len) {
linestarts[index++] = line;
while (PyLineTable_NextAddressRange(&bounds)) {
assert(bounds.ar_start/2 < len);
linestarts[bounds.ar_start/2] = bounds.ar_line;
}
while (index < len) {
linestarts[index++] = -1;
}
assert(index == len);
return linestarts;
}
@ -925,7 +911,7 @@ _PyFrame_New_NoTrack(PyThreadState *tstate, PyCodeObject *code,
}
f->f_lasti = -1;
f->f_lineno = code->co_firstlineno;
f->f_lineno = 0;
f->f_iblock = 0;
f->f_state = FRAME_CREATED;
f->f_gen = NULL;