https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115031
--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Rainer Orth <r...@gcc.gnu.org>: https://gcc.gnu.org/g:32f99225bcaae9b792aec143239d17f2b7e2c54b commit r15-927-g32f99225bcaae9b792aec143239d17f2b7e2c54b Author: Rainer Orth <r...@cebitec.uni-bielefeld.de> Date: Thu May 30 15:00:59 2024 +0200 ggc: Reduce GGC_QUIRE_SIZE on Solaris/SPARC [PR115031] g++.dg/modules/pr99023_b.X currently FAILs on 32-bit Solaris/SPARC: FAIL: g++.dg/modules/pr99023_b.X -std=c++2a 1 blank line(s) in output FAIL: g++.dg/modules/pr99023_b.X -std=c++2a (test for excess errors) Excess errors: cc1plus: out of memory allocating 1048344 bytes after a total of 7913472 bytes It turns out that this exhaustion of the 32-bit address space happens due to a combination of three issues: * the SPARC pagesize of 8 kB, * ggc-page.cc's chunk size of 512 * pagesize, i.e. 4 MB, and * mmap adding two 8 kB unmapped red-zone pages to each mapping which result in the 4 MB mappings to actually consume 4.5 MB of address space. To avoid this, this patch reduces the chunk size so it remains at 4 MB even when combined with the red-zone pages, as recommended by mmap(2). Tested on sparc-sun-solaris2.11 and sparcv9-sun-solaris2.11. 2024-05-29 Rainer Orth <r...@cebitec.uni-bielefeld.de> gcc: PR c++/115031 * config/sparc/sol2.h (GGC_QUIRE_SIZE): Define as 510.
