/* Memory ranges Copyright (C) 2010-2014 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "defs.h" #include "memrange.h" int mem_ranges_overlap (CORE_ADDR start1, int len1, CORE_ADDR start2, int len2) { ULONGEST h, l; l = max (start1, start2); h = min (start1 + len1, start2 + len2); return (l < h); } /* qsort comparison function, that compares mem_ranges. Ranges are sorted in ascending START order. */ static int compare_mem_ranges (const void *ap, const void *bp) { const struct mem_range *r1 = ap; const struct mem_range *r2 = bp; if (r1->start > r2->start) return 1; else if (r1->start < r2->start) return -1; else return 0; } void normalize_mem_ranges (VEC(mem_range_s) *ranges) { /* This function must not use any VEC operation on RANGES that reallocates the memory block as that invalidates the RANGES pointer, which callers expect to remain valid. */ if (!VEC_empty (mem_range_s, ranges)) { struct mem_range *ra, *rb; int a, b; qsort (VEC_address (mem_range_s, ranges), VEC_length (mem_range_s, ranges), sizeof (mem_range_s), compare_mem_ranges); a = 0; ra = VEC_index (mem_range_s, ranges, a); for (b = 1; VEC_iterate (mem_range_s, ranges, b, rb); b++) { /* If mem_range B overlaps or is adjacent to mem_range A, merge them. */ if (rb->start <= ra->start + ra->length) { ra->length = max (ra->length, (rb->start - ra->start) + rb->length); continue; /* next b, same a */ } a++; /* next a */ ra = VEC_index (mem_range_s, ranges, a); if (a != b) *ra = *rb; } VEC_truncate (mem_range_s, ranges, a + 1); } }