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-rw-r--r--js/src/gc/Memory.cpp11
1 files changed, 9 insertions, 2 deletions
diff --git a/js/src/gc/Memory.cpp b/js/src/gc/Memory.cpp
index 5cf0cd2f7..2bc1b9f50 100644
--- a/js/src/gc/Memory.cpp
+++ b/js/src/gc/Memory.cpp
@@ -415,8 +415,15 @@ InitMemorySubsystem()
static inline void*
MapMemoryAt(void* desired, size_t length, int prot = PROT_READ | PROT_WRITE,
int flags = MAP_PRIVATE | MAP_ANON, int fd = -1, off_t offset = 0)
+
+// Solaris manages 64-bit address space in a different manner from every other
+// AMD64 operating system, but fortunately the fix is the same one
+// required for every operating system on 64-bit SPARC, Itanium, and ARM.
+// Most people's intuition failed them here and they thought this couldn't
+// possibly be correct on AMD64, but for Solaris/illumos it is.
+
{
-#if defined(__ia64__) || (defined(__sparc64__) && defined(__NetBSD__)) || defined(__aarch64__)
+#if defined(__ia64__) || (defined(__sparc64__) && defined(__NetBSD__)) || defined(__aarch64__) || (defined(__sun) && defined(__x86_64__))
MOZ_ASSERT((0xffff800000000000ULL & (uintptr_t(desired) + length - 1)) == 0);
#endif
void* region = mmap(desired, length, prot, flags, fd, offset);
@@ -466,7 +473,7 @@ MapMemory(size_t length, int prot = PROT_READ | PROT_WRITE,
return nullptr;
}
return region;
-#elif defined(__aarch64__)
+#elif defined(__aarch64__) || (defined(__sun) && defined(__x86_64__))
/*
* There might be similar virtual address issue on arm64 which depends on
* hardware and kernel configurations. But the work around is slightly