Issue #1471 - Fix building on sparc64 Linux

Correct various pre-processor defines for sparc64 and in mozjemalloc use the JS arm64 allocator on Linux/sparc64.
This corrects build problems opn Linux sparc64 and is in line with bugzilla bug #1275204.

2 files changed, 7 insertions, 6 deletions

diff --git a/js/src/gc/Memory.cpp b/js/src/gc/Memory.cpp
index 418984057..17c964da0 100644
--- a/js/src/gc/Memory.cpp
+++ b/js/src/gc/Memory.cpp
@@ -423,7 +423,7 @@ MapMemoryAt(void* desired, size_t length, int prot = PROT_READ | PROT_WRITE,
 // possibly be correct on AMD64, but for Solaris/illumos it is.	
 	
 {
-#if defined(__ia64__) || (defined(__sparc64__) && defined(__NetBSD__)) || defined(__aarch64__) || (defined(__sun) && defined(__x86_64__))
+#if defined(__ia64__) || defined(__aarch64__) || (defined(__sun) && defined(__x86_64__)) || (defined(__sparc__) && defined(__arch64__) && (defined(__NetBSD__) || defined(__linux__)))
     MOZ_ASSERT((0xffff800000000000ULL & (uintptr_t(desired) + length - 1)) == 0);
 #endif
     void* region = mmap(desired, length, prot, flags, fd, offset);
@@ -446,7 +446,7 @@ static inline void*
 MapMemory(size_t length, int prot = PROT_READ | PROT_WRITE,
           int flags = MAP_PRIVATE | MAP_ANON, int fd = -1, off_t offset = 0)
 {
-#if defined(__ia64__) || (defined(__sparc64__) && defined(__NetBSD__))
+#if defined(__ia64__) || (defined(__sparc__) && defined(__arch64__) && defined(__NetBSD__))
     /*
      * 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
@@ -473,7 +473,7 @@ MapMemory(size_t length, int prot = PROT_READ | PROT_WRITE,
         return nullptr;
     }
     return region;
-#elif defined(__aarch64__) || (defined(__sun) && defined(__x86_64__))
+#elif defined(__aarch64__) || (defined(__sun) && defined(__x86_64__)) || (defined(__sparc__) && defined(__arch64__) && defined(__linux__))
    /*
     * There might be similar virtual address issue on arm64 which depends on
     * hardware and kernel configurations. But the work around is slightly
diff --git a/js/src/jsapi-tests/testGCAllocator.cpp b/js/src/jsapi-tests/testGCAllocator.cpp
index d203019ec..c7f430cb0 100644
--- a/js/src/jsapi-tests/testGCAllocator.cpp
+++ b/js/src/jsapi-tests/testGCAllocator.cpp
@@ -302,7 +302,8 @@ void unmapPages(void* p, size_t size) { }
 void*
 mapMemoryAt(void* desired, size_t length)
 {
-#if defined(__ia64__) || (defined(__sparc64__) && defined(__NetBSD__)) || defined(__aarch64__)
+#if defined(__ia64__) || defined(__aarch64__) || \
+    (defined(__sparc__) && defined(__arch64__) && (defined(__NetBSD__) || defined(__linux__)))
     MOZ_RELEASE_ASSERT(0xffff800000000000ULL & (uintptr_t(desired) + length - 1) == 0);
 #endif
     void* region = mmap(desired, length, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
@@ -324,7 +325,7 @@ mapMemory(size_t length)
     int fd = -1;
     off_t offset = 0;
     // The test code must be aligned with the implementation in gc/Memory.cpp.
-#if defined(__ia64__) || (defined(__sparc64__) && defined(__NetBSD__))
+#if defined(__ia64__) || (defined(__sparc__) && defined(__arch64__) && defined(__NetBSD__))
     void* region = mmap((void*)0x0000070000000000, length, prot, flags, fd, offset);
     if (region == MAP_FAILED)
         return nullptr;
@@ -334,7 +335,7 @@ mapMemory(size_t length)
         return nullptr;
     }
     return region;
-#elif defined(__aarch64__)
+#elif defined(__aarch64__) || (defined(__sparc__) && defined(__arch64__) && defined(__linux__))
     const uintptr_t start = UINT64_C(0x0000070000000000);
     const uintptr_t end   = UINT64_C(0x0000800000000000);
     const uintptr_t step  = js::gc::ChunkSize;