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vmprof-python/src/vmprof_get_custom_offset.h at master · vmprof/vmprof-python · GitHub
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#pragma
once
#ifdef
PYPY_JIT_CODEMAP
#include
"vmprof.h"
#ifdef
VMPROF_WINDOWS
#include
"msiinttypes/stdint.h"
#else
#include
<stdint.h>
#endif
void
*
pypy_find_codemap_at_addr
(
long
addr
,
long
*
start_addr
);
long
pypy_yield_codemap_at_addr
(
void
*
codemap_raw
,
long
addr
,
long
*
current_pos_addr
);
#define
MAX_INLINE_DEPTH
384
long
vmprof_write_header_for_jit_addr
(
intptr_t
*
result
,
long
n
,
intptr_t
addr
,
int
max_depth
)
{
void
*
codemap
;
long
current_pos
=
0
;
intptr_t
ident
,
local_stack
[
MAX_INLINE_DEPTH
];
long
m
;
long
start_addr
=
0
;
codemap
=
pypy_find_codemap_at_addr
(
addr
,
&
start_addr
);
if
(
codemap
==
NULL
||
n
>=
max_depth
-
2
)
// not a jit code at all or almost max depth
return
n
;
// modify the last entry to point to start address and not the random one
// in the middle
result
[
n
++
]
=
VMPROF_ASSEMBLER_TAG
;
result
[
n
++
]
=
start_addr
;
// build the list of code idents corresponding to the current
// position inside this particular piece of assembler. If (very
// unlikely) we get more than MAX_INLINE_DEPTH recursion levels
// all inlined inside this single piece of assembler, then stop:
// there will be some missing frames then. Otherwise, we need to
// first collect 'local_stack' and then write it to 'result' in the
// opposite order, stopping at 'max_depth'. Previous versions of
// the code would write the oldest calls and then stop---whereas
// what we really need it to write the newest calls and then stop.
m
=
0
;
while
(
m
<
MAX_INLINE_DEPTH
) {
ident
=
pypy_yield_codemap_at_addr
(
codemap
,
addr
,
&
current_pos
);
if
(
ident
==
-1
)
// finish
break
;
if
(
ident
==
0
)
continue
;
// not main codemap
local_stack
[
m
++
]
=
ident
;
}
while
(
m
>
0
&&
n
<
max_depth
) {
result
[
n
++
]
=
VMPROF_JITTED_TAG
;
result
[
n
++
]
=
local_stack
[
--
m
];
}
return
n
;
}
#endif
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