ResourceUsageCocoa.cpp [plain text]
#include "config.h"
#include <wtf/ResourceUsage.h>
#include <mach/mach_error.h>
#include <mach/mach_init.h>
#include <utility>
#include <wtf/spi/cocoa/MachVMSPI.h>
#include <wtf/text/StringConcatenateNumbers.h>
namespace WTF {
size_t vmPageSize()
{
#if PLATFORM(IOS_FAMILY)
return vm_kernel_page_size;
#else
static size_t cached = sysconf(_SC_PAGESIZE);
return cached;
#endif
}
void logFootprintComparison(const std::array<TagInfo, 256>& before, const std::array<TagInfo, 256>& after)
{
const size_t pageSize = vmPageSize();
WTFLogAlways("Per-tag breakdown of memory reclaimed by pressure handler:");
WTFLogAlways(" ## %16s %10s %10s %10s", "VM Tag", "Before", "After", "Diff");
for (unsigned i = 0; i < 256; ++i) {
ssize_t dirtyBefore = before[i].dirty * pageSize;
ssize_t dirtyAfter = after[i].dirty * pageSize;
ssize_t dirtyDiff = dirtyAfter - dirtyBefore;
if (!dirtyBefore && !dirtyAfter)
continue;
String tagName = displayNameForVMTag(i);
if (!tagName)
tagName = makeString("Tag ", i);
WTFLogAlways(" %02X %16s %10ld %10ld %10ld",
i,
tagName.ascii().data(),
dirtyBefore,
dirtyAfter,
dirtyDiff
);
}
}
const char* displayNameForVMTag(unsigned tag)
{
switch (tag) {
case VM_MEMORY_IOKIT: return "IOKit";
case VM_MEMORY_LAYERKIT: return "CoreAnimation";
case VM_MEMORY_IMAGEIO: return "ImageIO";
case VM_MEMORY_CGIMAGE: return "CG image";
case VM_MEMORY_JAVASCRIPT_CORE: return "Gigacage";
case VM_MEMORY_JAVASCRIPT_JIT_EXECUTABLE_ALLOCATOR: return "JSC JIT";
case VM_MEMORY_JAVASCRIPT_JIT_REGISTER_FILE: return "IsoHeap";
case VM_MEMORY_MALLOC: return "malloc";
case VM_MEMORY_MALLOC_HUGE: return "malloc (huge)";
case VM_MEMORY_MALLOC_LARGE: return "malloc (large)";
case VM_MEMORY_MALLOC_SMALL: return "malloc (small)";
case VM_MEMORY_MALLOC_TINY: return "malloc (tiny)";
case VM_MEMORY_MALLOC_NANO: return "malloc (nano)";
case VM_MEMORY_TCMALLOC: return "bmalloc";
case VM_MEMORY_FOUNDATION: return "Foundation";
case VM_MEMORY_STACK: return "Stack";
case VM_MEMORY_SQLITE: return "SQLite";
case VM_MEMORY_UNSHARED_PMAP: return "pmap (unshared)";
case VM_MEMORY_DYLIB: return "dylib";
case VM_MEMORY_CORESERVICES: return "CoreServices";
case VM_MEMORY_OS_ALLOC_ONCE: return "os_alloc_once";
case VM_MEMORY_LIBDISPATCH: return "libdispatch";
default: return nullptr;
}
}
std::array<TagInfo, 256> pagesPerVMTag()
{
std::array<TagInfo, 256> tags;
task_t task = mach_task_self();
mach_vm_size_t size;
uint32_t depth = 0;
struct vm_region_submap_info_64 info = { };
mach_msg_type_number_t count = VM_REGION_SUBMAP_INFO_COUNT_64;
for (mach_vm_address_t addr = 0; ; addr += size) {
int purgeableState;
if (mach_vm_purgable_control(task, addr, VM_PURGABLE_GET_STATE, &purgeableState) != KERN_SUCCESS)
purgeableState = VM_PURGABLE_DENY;
kern_return_t kr = mach_vm_region_recurse(task, &addr, &size, &depth, (vm_region_info_t)&info, &count);
if (kr != KERN_SUCCESS)
break;
tags[info.user_tag].reserved += size / vmPageSize();
if (purgeableState == VM_PURGABLE_VOLATILE) {
tags[info.user_tag].reclaimable += info.pages_resident;
continue;
}
if (purgeableState == VM_PURGABLE_EMPTY) {
tags[info.user_tag].reclaimable += size / vmPageSize();
continue;
}
bool anonymous = !info.external_pager;
if (anonymous) {
tags[info.user_tag].dirty += info.pages_resident - info.pages_reusable;
tags[info.user_tag].reclaimable += info.pages_reusable;
} else
tags[info.user_tag].dirty += info.pages_dirtied;
}
return tags;
}
}