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Consider compiling test.c, with this content:
VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV
#include "test.h"
int
main (int argc, char **argv)
{
int a = PLUS (1,2);
int b = PLUS (3,4);
return 0;
}
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
...where test.h has this content:
VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV
extern int foo ();
#define PLUS(A, B) A + B
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The undocumented -fdump-internal-locations option outputs this information
to stderr, showing what each source_location value means. Source code
lines are quoted, showing both per-line source_location values and
per-line&column source_location values (written vertically under the
corresponding character of source code).
VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV
RESERVED LOCATIONS
source_location interval: 0 <= loc < 2
ORDINARY MAP: 0
source_location interval: 2 <= loc < 3
file: test.c
starting at line: 1
column bits: 7
test.c: 1|loc: 2|#include "test.h"
|00000001111111111
|34567890123456789
ORDINARY MAP: 1
source_location interval: 3 <= loc < 4
file: <built-in>
starting at line: 0
column bits: 0
ORDINARY MAP: 2
source_location interval: 4 <= loc < 5
file: <command-line>
starting at line: 0
column bits: 0
ORDINARY MAP: 3
source_location interval: 5 <= loc < 5005
file: /usr/include/stdc-predef.h
starting at line: 1
column bits: 7
(contents of /usr/include/stdc-predef.h snipped for brevity)
ORDINARY MAP: 4
source_location interval: 5005 <= loc < 5006
file: <command-line>
starting at line: 1
column bits: 7
ORDINARY MAP: 5
source_location interval: 5006 <= loc < 5134
file: test.c
starting at line: 1
column bits: 7
test.c: 1|loc: 5006|#include "test.h"
|55555555555555555
|00000000000000000
|00011111111112222
|78901234567890123
ORDINARY MAP: 6
source_location interval: 5134 <= loc < 5416
file: test.h
starting at line: 1
column bits: 7
test.h: 1|loc: 5134|extern int foo ();
|555555555555555555
|111111111111111111
|333334444444444555
|567890123456789012
test.h: 2|loc: 5262|
|
|
|
|
test.h: 3|loc: 5390|#define PLUS(A, B) A + B
|555555555555555555555555
|333333333444444444444444
|999999999000000000011111
|123456789012345678901234
ORDINARY MAP: 7
source_location interval: 5416 <= loc < 6314
file: test.c
starting at line: 2
column bits: 7
test.c: 2|loc: 5416|
|
|
|
|
test.c: 3|loc: 5544|int
|555
|555
|444
|567
test.c: 4|loc: 5672|main (int argc, char **argv)
|5555555555555555555555555555
|6666666666666666666666666667
|7777777888888888899999999990
|3456789012345678901234567890
test.c: 5|loc: 5800|{
|5
|8
|0
|1
test.c: 6|loc: 5928| int a = PLUS (1,2);
|555555555555555555555
|999999999999999999999
|233333333334444444444
|901234567890123456789
test.c: 7|loc: 6056| int b = PLUS (3,4);
|666666666666666666666
|000000000000000000000
|555666666666677777777
|789012345678901234567
test.c: 8|loc: 6184| return 0;
|66666666666
|11111111111
|88888999999
|56789012345
test.c: 9|loc: 6312|}
|6
|3
|1
|3
UNALLOCATED LOCATIONS
source_location interval: 6314 <= loc < 2147483633
MACRO 1: PLUS (7 tokens)
source_location interval: 2147483633 <= loc < 2147483640
test.c:7:11: note: expansion point is location 6067
int b = PLUS (3,4);
^
map->start_location: 2147483633
macro_locations:
0: 6073, 5410
test.c:7:17: note: token 0 has x-location == 6073
int b = PLUS (3,4);
^
test.c:7:17: note: token 0 has y-location == 5410
1: 5412, 5412
In file included from test.c:1:0:
test.h:3:22: note: token 1 has x-location == y-location == 5412
#define PLUS(A, B) A + B
^
2: 6075, 5414
test.c:7:19: note: token 2 has x-location == 6075
int b = PLUS (3,4);
^
test.c:7:19: note: token 2 has y-location == 5414
3: 0, 2947526575
cc1: note: token 3 has x-location == 0
cc1: note: token 3 has y-location == 2947526575
4: 2947526575, 2947526575
x-location == y-location == 2947526575 encodes token # 800042942
5: 2947526575, 2947526575
x-location == y-location == 2947526575 encodes token # 800042942
6: 2947526575, 2947526575
x-location == y-location == 2947526575 encodes token # 800042942
MACRO 0: PLUS (7 tokens)
source_location interval: 2147483640 <= loc < 2147483647
test.c:6:11: note: expansion point is location 5939
int a = PLUS (1,2);
^
map->start_location: 2147483640
macro_locations:
0: 5945, 5410
test.c:6:17: note: token 0 has x-location == 5945
int a = PLUS (1,2);
^
test.c:6:17: note: token 0 has y-location == 5410
1: 5412, 5412
In file included from test.c:1:0:
test.h:3:22: note: token 1 has x-location == y-location == 5412
#define PLUS(A, B) A + B
^
2: 5947, 5414
test.c:6:19: note: token 2 has x-location == 5947
int a = PLUS (1,2);
^
test.c:6:19: note: token 2 has y-location == 5414
3: 0, 2947526575
cc1: note: token 3 has x-location == 0
cc1: note: token 3 has y-location == 2947526575
4: 2947526575, 2947526575
x-location == y-location == 2947526575 encodes token # 800042935
5: 2947526575, 2947526575
x-location == y-location == 2947526575 encodes token # 800042935
6: 2947526575, 2947526575
x-location == y-location == 2947526575 encodes token # 800042935
MAX_SOURCE_LOCATION
source_location interval: 2147483647 <= loc < 2147483648
AD-HOC LOCATIONS
source_location interval: 2147483648 <= loc < 4294967295
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
