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Diffstat (limited to 'lib/System/Unix/Process.inc')
| -rw-r--r-- | lib/System/Unix/Process.inc | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/lib/System/Unix/Process.inc b/lib/System/Unix/Process.inc new file mode 100644 index 0000000..74b9bb8 --- /dev/null +++ b/lib/System/Unix/Process.inc @@ -0,0 +1,237 @@ +//===- Unix/Process.cpp - Unix Process Implementation --------- -*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file provides the generic Unix implementation of the Process class. +// +//===----------------------------------------------------------------------===// + +#include "Unix.h" +#ifdef HAVE_SYS_TIME_H +#include <sys/time.h> +#endif +#ifdef HAVE_SYS_RESOURCE_H +#include <sys/resource.h> +#endif +#ifdef HAVE_MALLOC_H +#include <malloc.h> +#endif +#ifdef HAVE_MALLOC_MALLOC_H +#include <malloc/malloc.h> +#endif +#ifdef HAVE_SYS_IOCTL_H +# include <sys/ioctl.h> +#endif +#ifdef HAVE_TERMIOS_H +# include <termios.h> +#endif + +//===----------------------------------------------------------------------===// +//=== WARNING: Implementation here must contain only generic UNIX code that +//=== is guaranteed to work on *all* UNIX variants. +//===----------------------------------------------------------------------===// + +using namespace llvm; +using namespace sys; + +unsigned +Process::GetPageSize() +{ +#if defined(__CYGWIN__) + // On Cygwin, getpagesize() returns 64k but the page size for the purposes of + // memory protection and mmap() is 4k. + // See http://www.cygwin.com/ml/cygwin/2009-01/threads.html#00492 + static const int page_size = 0x1000; +#elif defined(HAVE_GETPAGESIZE) + static const int page_size = ::getpagesize(); +#elif defined(HAVE_SYSCONF) + static long page_size = ::sysconf(_SC_PAGE_SIZE); +#else +#warning Cannot get the page size on this machine +#endif + return static_cast<unsigned>(page_size); +} + +size_t Process::GetMallocUsage() { +#if defined(HAVE_MALLINFO) + struct mallinfo mi; + mi = ::mallinfo(); + return mi.uordblks; +#elif defined(HAVE_MALLOC_ZONE_STATISTICS) && defined(HAVE_MALLOC_MALLOC_H) + malloc_statistics_t Stats; + malloc_zone_statistics(malloc_default_zone(), &Stats); + return Stats.size_in_use; // darwin +#elif defined(HAVE_SBRK) + // Note this is only an approximation and more closely resembles + // the value returned by mallinfo in the arena field. + static char *StartOfMemory = reinterpret_cast<char*>(::sbrk(0)); + char *EndOfMemory = (char*)sbrk(0); + if (EndOfMemory != ((char*)-1) && StartOfMemory != ((char*)-1)) + return EndOfMemory - StartOfMemory; + else + return 0; +#else +#warning Cannot get malloc info on this platform + return 0; +#endif +} + +size_t +Process::GetTotalMemoryUsage() +{ +#if defined(HAVE_MALLINFO) + struct mallinfo mi = ::mallinfo(); + return mi.uordblks + mi.hblkhd; +#elif defined(HAVE_MALLOC_ZONE_STATISTICS) && defined(HAVE_MALLOC_MALLOC_H) + malloc_statistics_t Stats; + malloc_zone_statistics(malloc_default_zone(), &Stats); + return Stats.size_allocated; // darwin +#elif defined(HAVE_GETRUSAGE) + struct rusage usage; + ::getrusage(RUSAGE_SELF, &usage); + return usage.ru_maxrss; +#else +#warning Cannot get total memory size on this platform + return 0; +#endif +} + +void +Process::GetTimeUsage(TimeValue& elapsed, TimeValue& user_time, + TimeValue& sys_time) +{ + elapsed = TimeValue::now(); +#if defined(HAVE_GETRUSAGE) + struct rusage usage; + ::getrusage(RUSAGE_SELF, &usage); + user_time = TimeValue( + static_cast<TimeValue::SecondsType>( usage.ru_utime.tv_sec ), + static_cast<TimeValue::NanoSecondsType>( usage.ru_utime.tv_usec * + TimeValue::NANOSECONDS_PER_MICROSECOND ) ); + sys_time = TimeValue( + static_cast<TimeValue::SecondsType>( usage.ru_stime.tv_sec ), + static_cast<TimeValue::NanoSecondsType>( usage.ru_stime.tv_usec * + TimeValue::NANOSECONDS_PER_MICROSECOND ) ); +#else +#warning Cannot get usage times on this platform + user_time.seconds(0); + user_time.microseconds(0); + sys_time.seconds(0); + sys_time.microseconds(0); +#endif +} + +int Process::GetCurrentUserId() { + return getuid(); +} + +int Process::GetCurrentGroupId() { + return getgid(); +} + +#ifdef HAVE_MACH_MACH_H +#include <mach/mach.h> +#endif + +// Some LLVM programs such as bugpoint produce core files as a normal part of +// their operation. To prevent the disk from filling up, this function +// does what's necessary to prevent their generation. +void Process::PreventCoreFiles() { +#if HAVE_SETRLIMIT + struct rlimit rlim; + rlim.rlim_cur = rlim.rlim_max = 0; + setrlimit(RLIMIT_CORE, &rlim); +#endif + +#ifdef HAVE_MACH_MACH_H + // Disable crash reporting on Mac OS X 10.0-10.4 + + // get information about the original set of exception ports for the task + mach_msg_type_number_t Count = 0; + exception_mask_t OriginalMasks[EXC_TYPES_COUNT]; + exception_port_t OriginalPorts[EXC_TYPES_COUNT]; + exception_behavior_t OriginalBehaviors[EXC_TYPES_COUNT]; + thread_state_flavor_t OriginalFlavors[EXC_TYPES_COUNT]; + kern_return_t err = + task_get_exception_ports(mach_task_self(), EXC_MASK_ALL, OriginalMasks, + &Count, OriginalPorts, OriginalBehaviors, + OriginalFlavors); + if (err == KERN_SUCCESS) { + // replace each with MACH_PORT_NULL. + for (unsigned i = 0; i != Count; ++i) + task_set_exception_ports(mach_task_self(), OriginalMasks[i], + MACH_PORT_NULL, OriginalBehaviors[i], + OriginalFlavors[i]); + } + + // Disable crash reporting on Mac OS X 10.5 + signal(SIGABRT, _exit); + signal(SIGILL, _exit); + signal(SIGFPE, _exit); + signal(SIGSEGV, _exit); + signal(SIGBUS, _exit); +#endif +} + +bool Process::StandardInIsUserInput() { +#if HAVE_ISATTY + return isatty(0); +#endif + // If we don't have isatty, just return false. + return false; +} + +bool Process::StandardOutIsDisplayed() { +#if HAVE_ISATTY + return isatty(1); +#endif + // If we don't have isatty, just return false. + return false; +} + +bool Process::StandardErrIsDisplayed() { +#if HAVE_ISATTY + return isatty(2); +#endif + // If we don't have isatty, just return false. + return false; +} + +static unsigned getColumns(int FileID) { + // If COLUMNS is defined in the environment, wrap to that many columns. + if (const char *ColumnsStr = std::getenv("COLUMNS")) { + int Columns = std::atoi(ColumnsStr); + if (Columns > 0) + return Columns; + } + + unsigned Columns = 0; + +#if defined(HAVE_SYS_IOCTL_H) && defined(HAVE_TERMIOS_H) + // Try to determine the width of the terminal. + struct winsize ws; + if (ioctl(FileID, TIOCGWINSZ, &ws) == 0) + Columns = ws.ws_col; +#endif + + return Columns; +} + +unsigned Process::StandardOutColumns() { + if (!StandardOutIsDisplayed()) + return 0; + + return getColumns(1); +} + +unsigned Process::StandardErrColumns() { + if (!StandardErrIsDisplayed()) + return 0; + + return getColumns(2); +} |
