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| author | Eric Botcazou <ebotcazou@adacore.com> | 2021-04-13 11:57:55 +0200 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@adacore.com> | 2021-04-13 11:57:55 +0200 |
| commit | 1174314811af52779497462f26d21ea0038d1a85 (patch) | |
| tree | aad313e4824374849b6d2af98aaa348318d7380f /gcc/cp | |
| parent | 89e95ad2e7679322b2f5ee9070ff2721d5ca1d6d (diff) | |
| download | gcc-1174314811af52779497462f26d21ea0038d1a85.zip gcc-1174314811af52779497462f26d21ea0038d1a85.tar.gz gcc-1174314811af52779497462f26d21ea0038d1a85.tar.bz2 | |
Fix thinko in libcpp preparation patch for modules
The problem is that the new IS_MACRO_LOC macro:
inline bool
IS_MACRO_LOC (location_t loc)
{
return !IS_ORDINARY_LOC (loc) && !IS_ADHOC_LOC (loc);
}
is not fully correct since the position of the macro lines is not fixed:
/* Returns the lowest location [of a token resulting from macro
expansion] encoded in this line table. */
inline location_t
LINEMAPS_MACRO_LOWEST_LOCATION (const line_maps *set)
{
return LINEMAPS_MACRO_USED (set)
? MAP_START_LOCATION (LINEMAPS_LAST_MACRO_MAP (set))
: MAX_LOCATION_T + 1;
}
In Ada, LINEMAPS_MACRO_USED is false so LINEMAPS_MACRO_LOWEST_LOCATION is
MAX_LOCATION_T + 1, but IS_MACRO_LOC nevertheless returns true for anything
in the range [LINE_MAP_MAX_LOCATION; MAX_LOCATION_T], thus yielding an ICE
in linemap_macro_map_lookup for very large files.
libcpp/
* include/line-map.h (IS_MACRO_LOC): Delete.
* line-map.c (linemap_location_from_macro_expansion_p): Test
LINEMAPS_MACRO_LOWEST_LOCATION of the linemap.
gcc/cp/
* module.cc (ordinary_loc_of): Test LINEMAPS_MACRO_LOWEST_LOCATION
of the linemap.
(module_state::write_location): Likewise.
Diffstat (limited to 'gcc/cp')
| -rw-r--r-- | gcc/cp/module.cc | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/gcc/cp/module.cc b/gcc/cp/module.cc index c80c7bc..ab8b1f1 100644 --- a/gcc/cp/module.cc +++ b/gcc/cp/module.cc @@ -13709,7 +13709,7 @@ ordinary_loc_of (line_maps *lmaps, location_t from) { if (IS_ADHOC_LOC (from)) from = get_location_from_adhoc_loc (lmaps, from); - if (IS_MACRO_LOC (from)) + if (from >= LINEMAPS_MACRO_LOWEST_LOCATION (lmaps)) { /* Find the ordinary location nearest FROM. */ const line_map *map = linemap_lookup (lmaps, from); @@ -15554,7 +15554,7 @@ module_state::write_location (bytes_out &sec, location_t loc) write_location (sec, range.m_start); write_location (sec, range.m_finish); } - else if (IS_MACRO_LOC (loc)) + else if (loc >= LINEMAPS_MACRO_LOWEST_LOCATION (line_table)) { if (const loc_spans::span *span = spans.macro (loc)) { |