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| author | Ben Gamari <ben@smart-cactus.org> | 2020-01-24 14:40:33 (GMT) |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2020-02-01 07:29:23 (GMT) |
| commit | 58ed6c4a0999c0025b1b024bc26171fa6d6773b3 (patch) | |
| tree | 5c9737af1c239b4b5e0b7e03114fba514fddae16 | |
| parent | 913287a0fa5370a2488ce560f2dfba61db51055d (diff) | |
| download | ghc-58ed6c4a0999c0025b1b024bc26171fa6d6773b3.zip ghc-58ed6c4a0999c0025b1b024bc26171fa6d6773b3.tar.gz ghc-58ed6c4a0999c0025b1b024bc26171fa6d6773b3.tar.bz2 | |
rts/M32Alloc: Don't attempt to unmap non-existent pages
The m32 allocator's `pages` list may contain NULLs in the case that the
page was flushed. Some `munmap` implementations (e.g. FreeBSD's) don't
like it if we pass them NULL. Don't do that.
| -rw-r--r-- | rts/linker/M32Alloc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/rts/linker/M32Alloc.c b/rts/linker/M32Alloc.c index 6f61a5c..1a19df8 100644 --- a/rts/linker/M32Alloc.c +++ b/rts/linker/M32Alloc.c @@ -317,7 +317,9 @@ void m32_allocator_free(m32_allocator *alloc) /* free partially-filled pages */ const size_t pgsz = getPageSize(); for (int i=0; i < M32_MAX_PAGES; i++) { - munmapForLinker(alloc->pages[i], pgsz); + if (alloc->pages[i]) { + munmapForLinker(alloc->pages[i], pgsz); + } } stgFree(alloc); |