diff options
Diffstat (limited to 'xpcom/base/nsMemoryReporterManager.cpp')
| -rw-r--r-- | xpcom/base/nsMemoryReporterManager.cpp | 166 |
1 files changed, 165 insertions, 1 deletions
diff --git a/xpcom/base/nsMemoryReporterManager.cpp b/xpcom/base/nsMemoryReporterManager.cpp index 4397f470e8..c47d3c8415 100644 --- a/xpcom/base/nsMemoryReporterManager.cpp +++ b/xpcom/base/nsMemoryReporterManager.cpp @@ -394,6 +394,168 @@ ResidentFastDistinguishedAmount(int64_t* aN) return ResidentDistinguishedAmount(aN); } +#elif defined(XP_MACOSX) + +#include <mach/mach_init.h> +#include <mach/mach_vm.h> +#include <mach/shared_region.h> +#include <mach/task.h> +#include <sys/sysctl.h> + +static MOZ_MUST_USE bool +GetTaskBasicInfo(struct task_basic_info* aTi) +{ + mach_msg_type_number_t count = TASK_BASIC_INFO_COUNT; + kern_return_t kr = task_info(mach_task_self(), TASK_BASIC_INFO, + (task_info_t)aTi, &count); + return kr == KERN_SUCCESS; +} + +// The VSIZE figure on Mac includes huge amounts of shared memory and is always +// absurdly high, eg. 2GB+ even at start-up. But both 'top' and 'ps' report +// it, so we might as well too. +#define HAVE_VSIZE_AND_RESIDENT_REPORTERS 1 +static MOZ_MUST_USE nsresult +VsizeDistinguishedAmount(int64_t* aN) +{ + task_basic_info ti; + if (!GetTaskBasicInfo(&ti)) { + return NS_ERROR_FAILURE; + } + *aN = ti.virtual_size; + return NS_OK; +} + +// If we're using jemalloc on Mac, we need to instruct jemalloc to purge the +// pages it has madvise(MADV_FREE)'d before we read our RSS in order to get +// an accurate result. The OS will take away MADV_FREE'd pages when there's +// memory pressure, so ideally, they shouldn't count against our RSS. +// +// Purging these pages can take a long time for some users (see bug 789975), +// so we provide the option to get the RSS without purging first. +static MOZ_MUST_USE nsresult +ResidentDistinguishedAmountHelper(int64_t* aN, bool aDoPurge) +{ +#ifdef HAVE_JEMALLOC_STATS + if (aDoPurge) { + jemalloc_purge_freed_pages(); + } +#endif + + task_basic_info ti; + if (!GetTaskBasicInfo(&ti)) { + return NS_ERROR_FAILURE; + } + *aN = ti.resident_size; + return NS_OK; +} + +static MOZ_MUST_USE nsresult +ResidentFastDistinguishedAmount(int64_t* aN) +{ + return ResidentDistinguishedAmountHelper(aN, /* doPurge = */ false); +} + +static MOZ_MUST_USE nsresult +ResidentDistinguishedAmount(int64_t* aN) +{ + return ResidentDistinguishedAmountHelper(aN, /* doPurge = */ true); +} + +#define HAVE_RESIDENT_UNIQUE_REPORTER 1 + +static bool +InSharedRegion(mach_vm_address_t aAddr, cpu_type_t aType) +{ + mach_vm_address_t base; + mach_vm_address_t size; + + switch (aType) { + case CPU_TYPE_ARM: + base = SHARED_REGION_BASE_ARM; + size = SHARED_REGION_SIZE_ARM; + break; + case CPU_TYPE_I386: + base = SHARED_REGION_BASE_I386; + size = SHARED_REGION_SIZE_I386; + break; + case CPU_TYPE_X86_64: + base = SHARED_REGION_BASE_X86_64; + size = SHARED_REGION_SIZE_X86_64; + break; + default: + return false; + } + + return base <= aAddr && aAddr < (base + size); +} + +static MOZ_MUST_USE nsresult +ResidentUniqueDistinguishedAmount(int64_t* aN) +{ + if (!aN) { + return NS_ERROR_FAILURE; + } + + cpu_type_t cpu_type; + size_t len = sizeof(cpu_type); + if (sysctlbyname("sysctl.proc_cputype", &cpu_type, &len, NULL, 0) != 0) { + return NS_ERROR_FAILURE; + } + + // Roughly based on libtop_update_vm_regions in + // http://www.opensource.apple.com/source/top/top-100.1.2/libtop.c + size_t privatePages = 0; + mach_vm_size_t size = 0; + for (mach_vm_address_t addr = MACH_VM_MIN_ADDRESS; ; addr += size) { + vm_region_top_info_data_t info; + mach_msg_type_number_t infoCount = VM_REGION_TOP_INFO_COUNT; + mach_port_t objectName; + + kern_return_t kr = + mach_vm_region(mach_task_self(), &addr, &size, VM_REGION_TOP_INFO, + reinterpret_cast<vm_region_info_t>(&info), + &infoCount, &objectName); + if (kr == KERN_INVALID_ADDRESS) { + // Done iterating VM regions. + break; + } else if (kr != KERN_SUCCESS) { + return NS_ERROR_FAILURE; + } + + if (InSharedRegion(addr, cpu_type) && info.share_mode != SM_PRIVATE) { + continue; + } + + switch (info.share_mode) { + case SM_LARGE_PAGE: + // NB: Large pages are not shareable and always resident. + case SM_PRIVATE: + privatePages += info.private_pages_resident; + privatePages += info.shared_pages_resident; + break; + case SM_COW: + privatePages += info.private_pages_resident; + if (info.ref_count == 1) { + // Treat copy-on-write pages as private if they only have one reference. + privatePages += info.shared_pages_resident; + } + break; + case SM_SHARED: + default: + break; + } + } + + vm_size_t pageSize; + if (host_page_size(mach_host_self(), &pageSize) != KERN_SUCCESS) { + pageSize = PAGE_SIZE; + } + + *aN = privatePages * pageSize; + return NS_OK; +} + #elif defined(XP_WIN) #include <windows.h> @@ -984,7 +1146,9 @@ ResidentPeakDistinguishedAmount(int64_t* aN) // - Solaris: pages? But some sources it actually always returns 0, so // check for that // - Linux, {Net/Open/Free}BSD, DragonFly: KiB -#if defined(XP_SOLARIS) +#ifdef XP_MACOSX + *aN = usage.ru_maxrss; +#elif defined(XP_SOLARIS) *aN = usage.ru_maxrss * getpagesize(); #else *aN = usage.ru_maxrss * 1024; |