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--- libmalloc/libmalloc-283.60.1/src/vm.c
+++ libmalloc/libmalloc-140.40.1/src/vm.c
@@ -42,7 +42,7 @@
mvm_aslr_init(void)
{
// Prepare ASLR
-#if __i386__ || __x86_64__ || __arm64__ || (TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR)
+#if __i386__ || __x86_64__ || __arm64__ || TARGET_OS_EMBEDDED
#if __i386__
uintptr_t stackbase = 0x8fe00000;
int entropic_bits = 3;
@@ -50,13 +50,8 @@
uintptr_t stackbase = USRSTACK64;
int entropic_bits = 16;
#elif __arm64__
-#if __LP64__
uintptr_t stackbase = USRSTACK64;
int entropic_bits = 7;
-#else // __LP64__
- uintptr_t stackbase = USRSTACK;
- int entropic_bits = 3;
-#endif
#else
uintptr_t stackbase = USRSTACK;
int entropic_bits = 3;
@@ -74,9 +69,9 @@
malloc_entropy[0] = 0;
malloc_entropy[1] = 0;
}
-#else // TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR
+#else
#error ASLR unhandled on this platform
-#endif // TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR
+#endif
}
void *
@@ -114,7 +109,7 @@
kr = mach_vm_map(mach_task_self(), &vm_addr, allocation_size, allocation_mask, alloc_flags, MEMORY_OBJECT_NULL, 0, FALSE,
VM_PROT_DEFAULT, VM_PROT_ALL, VM_INHERIT_DEFAULT);
if (kr) {
- malloc_zone_error(debug_flags, false, "can't allocate region\n*** mach_vm_map(size=%lu) failed (error code=%d)\n", size, kr);
+ szone_error(debug_flags, 0, "can't allocate region", NULL, "*** mach_vm_map(size=%lu) failed (error code=%d)\n", size, kr);
return NULL;
}
addr = (uintptr_t)vm_addr;
@@ -135,17 +130,16 @@
/* Unmap the excess area. */
kr = mach_vm_deallocate(mach_task_self(), addr, leading);
if (kr) {
- malloc_zone_error(debug_flags, false, "can't unmap excess guard region\n"
- "*** mach_vm_deallocate(addr=%p, size=%lu) failed (code=%d)\n",
- (void *)addr, leading, kr);
+ szone_error(debug_flags, 0, "can't unmap excess guard region", NULL,
+ "*** mach_vm_deallocate(addr=%p, size=%lu) failed (code=%d)", (void *)addr, leading, kr);
return NULL;
}
kr = mach_vm_deallocate(mach_task_self(), addr + allocation_size - trailing, trailing);
if (kr) {
- malloc_zone_error(debug_flags, false, "can't unmap excess trailing guard region\n"
- "*** mach_vm_deallocate(addr=%p, size=%lu) failed (code=%d)\n",
- (void *)(addr + allocation_size - trailing), trailing, kr);
+ szone_error(debug_flags, 0, "can't unmap excess trailing guard region", NULL,
+ "*** mach_vm_deallocate(addr=%p, size=%lu) failed (code=%d)", (void *)(addr + allocation_size - trailing),
+ trailing, kr);
return NULL;
}
@@ -189,8 +183,8 @@
VM_PROT_DEFAULT, VM_PROT_ALL, VM_INHERIT_DEFAULT);
}
if (kr) {
- malloc_zone_error(debug_flags, false, "can't allocate region securely\n",
- "*** mach_vm_map(size=%lu) failed (error code=%d)\n", size, kr);
+ szone_error(debug_flags, 0, "can't allocate region securely",
+ NULL, "*** mach_vm_map(size=%lu) failed (error code=%d)\n", size, kr);
return NULL;
}
addr = (uintptr_t)vm_addr;
@@ -233,7 +227,7 @@
}
kr = mach_vm_deallocate(mach_task_self(), vm_addr, allocation_size);
if (kr) {
- malloc_zone_error(debug_flags, false, "Can't deallocate_pages region at %p\n", addr);
+ szone_error(debug_flags, 0, "Can't deallocate_pages region", addr, NULL);
}
}
@@ -245,30 +239,29 @@
if (!(debug_flags & MALLOC_DONT_PROTECT_PRELUDE)) {
err = mprotect((void *)((uintptr_t)address - vm_page_quanta_size), vm_page_quanta_size, protection);
if (err) {
- malloc_report(ASL_LEVEL_ERR, "*** can't mvm_protect(%u) region for prelude guard page at %p\n", protection,
- (void *)((uintptr_t)address - vm_page_quanta_size));
+ malloc_printf("*** can't mvm_protect(%p) region for prelude guard page at %p\n", protection,
+ (uintptr_t)address - vm_page_quanta_size);
}
}
if (!(debug_flags & MALLOC_DONT_PROTECT_POSTLUDE)) {
err = mprotect((void *)(round_page_quanta(((uintptr_t)address + size))), vm_page_quanta_size, protection);
if (err) {
- malloc_report(ASL_LEVEL_ERR, "*** can't mvm_protect(%u) region for postlude guard page at %p\n", protection,
- (void *)((uintptr_t)address + size));
+ malloc_printf("*** can't mvm_protect(%p) region for postlude guard page at %p\n", protection, (uintptr_t)address + size);
}
}
}
int
-mvm_madvise_free(void *rack, void *r, uintptr_t pgLo, uintptr_t pgHi, uintptr_t *last, boolean_t scribble)
+mvm_madvise_free(rack_t *rack, region_t r, uintptr_t pgLo, uintptr_t pgHi, uintptr_t *last)
{
if (pgHi > pgLo) {
size_t len = pgHi - pgLo;
- if (scribble) {
+ if (rack->debug_flags & MALLOC_DO_SCRIBBLE) {
memset((void *)pgLo, SCRUBBLE_BYTE, len); // Scribble on MADV_FREEd memory
}
-#if TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR
+#if TARGET_OS_EMBEDDED
if (last) {
if (*last == pgLo) {
return 0;
@@ -276,19 +269,32 @@
*last = pgLo;
}
-#endif // TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR
-
- MAGMALLOC_MADVFREEREGION(rack, r, (void *)pgLo, (int)len); // DTrace USDT Probe
+#endif
+
+ MAGMALLOC_MADVFREEREGION((void *)rack, (void *)r, (void *)pgLo, (int)len); // DTrace USDT Probe
if (-1 == madvise((void *)pgLo, len, CONFIG_MADVISE_STYLE)) {
/* -1 return: VM map entry change makes this unfit for reuse. Something evil lurks. */
#if DEBUG_MADVISE
- malloc_zone_error(NULL, false,
- "madvise_free_range madvise(..., MADV_FREE_REUSABLE) failed for %p, length=%d\n",
- (void *)pgLo, len);
+ szone_error(NULL, 0, "madvise_free_range madvise(..., MADV_FREE_REUSABLE) failed", (void *)pgLo, "length=%d\n", len);
+#endif
+ }
+ }
+ return 0;
+}
+
+int
+mvm_madvise_reuse(region_t r, uintptr_t pgLo, uintptr_t phHi, uint32_t debug_flags)
+{
+ if (phHi > pgLo) {
+ size_t len = phHi - pgLo;
+
+ if (madvise((void *)pgLo, len, MADV_FREE_REUSE) == -1) {
+ /* -1 return: VM map entry change makes this unfit for reuse. Something evil lurks. */
+#if DEBUG_MADVISE
+ szone_error(debug_flags, 0, "madvise_reuse_range madvise(..., MADV_FREE_REUSE) failed", sparse_region, "length=%d\n",
+ TINY_REGION_PAYLOAD_BYTES);
#endif
return 1;
- } else {
- MALLOC_TRACE(TRACE_madvise, (uintptr_t)r, (uintptr_t)pgLo, len, CONFIG_MADVISE_STYLE);
}
}
return 0;