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Diffstat (limited to 'dev-lang/spidermonkey/files/spidermonkey-17-ia64-mmap.patch')
-rw-r--r--dev-lang/spidermonkey/files/spidermonkey-17-ia64-mmap.patch67
1 files changed, 67 insertions, 0 deletions
diff --git a/dev-lang/spidermonkey/files/spidermonkey-17-ia64-mmap.patch b/dev-lang/spidermonkey/files/spidermonkey-17-ia64-mmap.patch
new file mode 100644
index 00000000000..7adbd118d40
--- /dev/null
+++ b/dev-lang/spidermonkey/files/spidermonkey-17-ia64-mmap.patch
@@ -0,0 +1,67 @@
+--- a/js/src/gc/Memory.cpp 2013-02-11 17:33:22.000000000 -0500
++++ b/js/src/gc/Memory.cpp 2014-01-08 12:36:29.406851422 -0500
+@@ -302,10 +302,46 @@
+ void
+ InitMemorySubsystem()
+ {
++#if !defined(__ia64__)
+ if (size_t(sysconf(_SC_PAGESIZE)) != PageSize)
+ MOZ_CRASH();
++#endif
+ }
+
++static inline void *
++MapMemory(size_t length, int prot, int flags, int fd, off_t offset)
++{
++#if defined(__ia64__)
++ /*
++ * The JS engine assumes that all allocated pointers have their high 17 bits clear,
++ * which ia64's mmap doesn't support directly. However, we can emulate it by passing
++ * mmap an "addr" parameter with those bits clear. The mmap will return that address,
++ * or the nearest available memory above that address, providing a near-guarantee
++ * that those bits are clear. If they are not, we return NULL below to indicate
++ * out-of-memory.
++ *
++ * The addr is chosen as 0x0000070000000000, which still allows about 120TB of virtual
++ * address space.
++ *
++ * See Bug 589735 for more information.
++ */
++ void *region = mmap((void*)0x0000070000000000, length, prot, flags, fd, offset);
++ if (region == MAP_FAILED)
++ return MAP_FAILED;
++ /*
++ * If the allocated memory doesn't have its upper 17 bits clear, consider it
++ * as out of memory.
++ */
++ if ((uintptr_t(region) + (length - 1)) & 0xffff800000000000) {
++ JS_ALWAYS_TRUE(0 == munmap(region, length));
++ return MAP_FAILED;
++ }
++ return region;
++#else
++ return mmap(NULL, length, prot, flags, fd, offset);
++#endif
++}
++
+ void *
+ MapAlignedPages(size_t size, size_t alignment)
+ {
+@@ -319,12 +353,15 @@
+
+ /* Special case: If we want page alignment, no further work is needed. */
+ if (alignment == PageSize) {
+- return mmap(NULL, size, prot, flags, -1, 0);
++ void *region = MapMemory(size, prot, flags, -1, 0);
++ if (region == MAP_FAILED)
++ return NULL;
++ return region;
+ }
+
+ /* Overallocate and unmap the region's edges. */
+ size_t reqSize = Min(size + 2 * alignment, 2 * size);
+- void *region = mmap(NULL, reqSize, prot, flags, -1, 0);
++ void *region = MapMemory(reqSize, prot, flags, -1, 0);
+ if (region == MAP_FAILED)
+ return NULL;
+