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Delete sysinfo/* and all references to it. 

llvm-svn: 148386
This commit is contained in:
Alexander Potapenko 2012-01-18 11:42:30 +00:00
parent 4257386879
commit 38da9a04f5
10 changed files with 7 additions and 1335 deletions
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2
compiler-rt/lib/asan/Makefile.mk
View File

@ -8,7 +8,7 @@
#===------------------------------------------------------------------------===#
ModuleName := asan
SubDirs := mach_override sysinfo
SubDirs := mach_override
Sources := $(foreach file,$(wildcard $(Dir)/*.cc),$(notdir $(file)))
ObjNames := $(Sources:%.cc=%.o)

8
compiler-rt/lib/asan/Makefile.old
View File

@ -178,9 +178,7 @@ RTL_HDR=asan_allocator.h \
asan_stats.h \
asan_thread.h \
asan_thread_registry.h \
mach_override/mach_override.h \
sysinfo/basictypes.h \
sysinfo/sysinfo.h
mach_override/mach_override.h
LIBASAN_OBJ=$(BIN)/asan_rtl$(SUFF).o \
$(BIN)/asan_allocator$(SUFF).o \
@ -197,8 +195,7 @@ LIBASAN_OBJ=$(BIN)/asan_rtl$(SUFF).o \
$(BIN)/asan_stats$(SUFF).o \
$(BIN)/asan_thread$(SUFF).o \
$(BIN)/asan_thread_registry$(SUFF).o \
$(BIN)/mach_override/mach_override$(SUFF).o \
$(BIN)/sysinfo/sysinfo$(SUFF).o
$(BIN)/mach_override/mach_override$(SUFF).o
GTEST_ROOT=third_party/googletest
GTEST_INCLUDE=-I$(GTEST_ROOT)/include
@ -229,7 +226,6 @@ lib32:
$(BIN):
mkdir -p $(BIN)
mkdir -p $(BIN)/sysinfo
mkdir -p $(BIN)/mach_override
clang:

1
compiler-rt/lib/asan/README.txt
View File

@ -10,7 +10,6 @@ Makefile.mk : Currently a stub for a proper makefile. not usable.
Makefile.old : Old out-of-tree makefile, the only usable one so far.
asan_*.{cc,h} : Sources of the asan run-time lirbary.
mach_override/* : Utility to override functions on Darwin (MIT License).
sysinfo/* : Portable utility to iterate over /proc/maps (BSD License).
scripts/* : Helper scripts.
Temporary build instructions (verified on linux):

10
compiler-rt/lib/asan/asan_internal.h
View File

@ -38,16 +38,6 @@
// Build-time configuration options.
// If set, sysinfo/sysinfo.h will be used to iterate over /proc/maps.
#ifndef ASAN_USE_SYSINFO
#ifdef __linux__
# define ASAN_USE_SYSINFO 0
#else
// TODO(glider): clean up sysinfo.
# define ASAN_USE_SYSINFO 0
#endif
#endif
// If set, asan will install its own SEGV signal handler.
#ifndef ASAN_NEEDS_SEGV
# define ASAN_NEEDS_SEGV 1

98
compiler-rt/lib/asan/asan_stack.cc
View File

@ -18,10 +18,6 @@
#include "asan_thread.h"
#include "asan_thread_registry.h"
#if ASAN_USE_SYSINFO == 1
#include "sysinfo/sysinfo.h"
#endif
#ifdef ASAN_USE_EXTERNAL_SYMBOLIZER
extern bool
ASAN_USE_EXTERNAL_SYMBOLIZER(const void *pc, char *out, int out_size);
@ -29,93 +25,8 @@ ASAN_USE_EXTERNAL_SYMBOLIZER(const void *pc, char *out, int out_size);
namespace __asan {
// ----------------------- ProcSelfMaps ----------------------------- {{{1
#if ASAN_USE_SYSINFO == 1
class ProcSelfMaps {
public:
void Init() {
ScopedLock lock(&mu_);
if (map_size_ != 0) return; // already inited
if (FLAG_v >= 2) {
Printf("ProcSelfMaps::Init()\n");
}
ProcMapsIterator it(0, &proc_self_maps_); // 0 means "current pid"
uint64 start, end, offset;
int64 inode;
char *flags, *filename;
CHECK(map_size_ == 0);
while (it.Next(&start, &end, &flags, &offset, &inode, &filename)) {
CHECK(map_size_ < kMaxProcSelfMapsSize);
Mapping &mapping = memory_map[map_size_];
mapping.beg = start;
mapping.end = end;
mapping.offset = offset;
real_strncpy(mapping.name,
filename, ASAN_ARRAY_SIZE(mapping.name));
mapping.name[ASAN_ARRAY_SIZE(mapping.name) - 1] = 0;
if (FLAG_v >= 2) {
Printf("[%ld] [%p,%p] off %p %s\n", map_size_,
mapping.beg, mapping.end, mapping.offset, mapping.name);
}
map_size_++;
}
}
void Print() {
Printf("%s\n", proc_self_maps_);
}
void PrintPc(uintptr_t pc, int idx) {
for (size_t i = 0; i < map_size_; i++) {
Mapping &m = memory_map[i];
if (pc >= m.beg && pc < m.end) {
uintptr_t offset = pc - m.beg;
if (i == 0) offset = pc;
Printf(" #%d 0x%lx (%s+0x%lx)\n", idx, pc, m.name, offset);
return;
}
}
Printf(" #%d 0x%lx\n", idx, pc);
}
private:
void copy_until_new_line(const char *str, char *dest, size_t max_size) {
size_t i = 0;
for (; str[i] && str[i] != '\n' && i < max_size - 1; i++) {
dest[i] = str[i];
}
dest[i] = 0;
}
struct Mapping {
uintptr_t beg, end, offset;
char name[1000];
};
static const size_t kMaxNumMapEntries = 4096;
static const size_t kMaxProcSelfMapsSize = 1 << 20;
ProcMapsIterator::Buffer proc_self_maps_;
size_t map_size_;
Mapping memory_map[kMaxNumMapEntries];
static AsanLock mu_;
};
static ProcSelfMaps proc_self_maps;
AsanLock ProcSelfMaps::mu_(LINKER_INITIALIZED);
void AsanStackTrace::PrintStack(uintptr_t *addr, size_t size) {
proc_self_maps.Init();
for (size_t i = 0; i < size && addr[i]; i++) {
uintptr_t pc = addr[i];
// int line;
proc_self_maps.PrintPc(pc, i);
// Printf(" #%ld 0x%lx %s\n", i, pc, rtn.c_str());
}
}
#elif defined(ASAN_USE_EXTERNAL_SYMBOLIZER)
// ----------------------- AsanStackTrace ----------------------------- {{{1
#if defined(ASAN_USE_EXTERNAL_SYMBOLIZER)
void AsanStackTrace::PrintStack(uintptr_t *addr, size_t size) {
for (size_t i = 0; i < size && addr[i]; i++) {
uintptr_t pc = addr[i];
@ -125,7 +36,7 @@ void AsanStackTrace::PrintStack(uintptr_t *addr, size_t size) {
}
}
#else // ASAN_USE_SYSINFO
#else // ASAN_USE_EXTERNAL_SYMBOLIZER
void AsanStackTrace::PrintStack(uintptr_t *addr, size_t size) {
AsanProcMaps proc_maps;
for (size_t i = 0; i < size && addr[i]; i++) {
@ -141,7 +52,7 @@ void AsanStackTrace::PrintStack(uintptr_t *addr, size_t size) {
}
}
}
#endif // ASAN_USE_SYSINFO
#endif // ASAN_USE_EXTERNAL_SYMBOLIZER
#ifdef __arm__
#define UNWIND_STOP _URC_END_OF_STACK
@ -151,7 +62,6 @@ void AsanStackTrace::PrintStack(uintptr_t *addr, size_t size) {
#define UNWIND_CONTINUE _URC_NO_REASON
#endif
// ----------------------- AsanStackTrace ----------------------------- {{{1
uintptr_t AsanStackTrace::GetCurrentPc() {
return GET_CALLER_PC();
}

29
compiler-rt/lib/asan/sysinfo/LICENSE.TXT
View File

@ -1,29 +0,0 @@
Copyright (c) 2005, Google Inc.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

22
compiler-rt/lib/asan/sysinfo/Makefile.mk
View File

@ -1,22 +0,0 @@
#===- lib/asan/sysinfo/Makefile.mk -------------------------*- Makefile -*--===#
#
# The LLVM Compiler Infrastructure
#
# This file is distributed under the University of Illinois Open Source
# License. See LICENSE.TXT for details.
#
#===------------------------------------------------------------------------===#
ModuleName := asan
SubDirs :=
Sources := $(foreach file,$(wildcard $(Dir)/*.cc),$(notdir $(file)))
ObjNames := $(Sources:%.c=%.o)
Implementation := Generic
# FIXME: use automatic dependencies?
Dependencies := $(wildcard $(Dir)/*.h)
# Define a convenience variable for all the asan functions.
AsanFunctions += $(Sources:%.cc=%)

321
compiler-rt/lib/asan/sysinfo/basictypes.h
View File

@ -1,321 +0,0 @@
// Copyright (c) 2005, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef _BASICTYPES_H_
#define _BASICTYPES_H_
#include <inttypes.h> // uint16_t might be here; PRId64 too.
#include <stdint.h> // to get uint16_t (ISO naming madness)
#include <sys/types.h> // our last best hope for uint16_t
// Standard typedefs
// All Google code is compiled with -funsigned-char to make "char"
// unsigned. Google code therefore doesn't need a "uchar" type.
// TODO(csilvers): how do we make sure unsigned-char works on non-gcc systems?
typedef signed char schar;
typedef int8_t int8;
typedef int16_t int16;
typedef int32_t int32;
typedef int64_t int64;
// NOTE: unsigned types are DANGEROUS in loops and other arithmetical
// places. Use the signed types unless your variable represents a bit
// pattern (eg a hash value) or you really need the extra bit. Do NOT
// use 'unsigned' to express "this value should always be positive";
// use assertions for this.
typedef uint8_t uint8;
typedef uint16_t uint16;
typedef uint32_t uint32;
typedef uint64_t uint64;
const uint16 kuint16max = ( (uint16) 0xFFFF);
const uint32 kuint32max = ( (uint32) 0xFFFFFFFF);
const uint64 kuint64max = ( (((uint64) kuint32max) << 32) | kuint32max );
const int8 kint8max = ( ( int8) 0x7F);
const int16 kint16max = ( ( int16) 0x7FFF);
const int32 kint32max = ( ( int32) 0x7FFFFFFF);
const int64 kint64max = ( ((( int64) kint32max) << 32) | kuint32max );
const int8 kint8min = ( ( int8) 0x80);
const int16 kint16min = ( ( int16) 0x8000);
const int32 kint32min = ( ( int32) 0x80000000);
const int64 kint64min = ( ((( int64) kint32min) << 32) | 0 );
// Define the "portable" printf and scanf macros, if they're not
// already there (via the inttypes.h we #included above, hopefully).
// Mostly it's old systems that don't support inttypes.h, so we assume
// they're 32 bit.
#ifndef PRIx64
#define PRIx64 "llx"
#endif
#ifndef SCNx64
#define SCNx64 "llx"
#endif
#ifndef PRId64
#define PRId64 "lld"
#endif
#ifndef SCNd64
#define SCNd64 "lld"
#endif
#ifndef PRIu64
#define PRIu64 "llu"
#endif
#ifndef PRIxPTR
#define PRIxPTR "lx"
#endif
// Also allow for printing of a pthread_t.
#define GPRIuPTHREAD "lu"
#define GPRIxPTHREAD "lx"
#if defined(__CYGWIN__) || defined(__CYGWIN32__) || defined(__APPLE__) || defined(__FreeBSD__)
#define PRINTABLE_PTHREAD(pthreadt) reinterpret_cast<uintptr_t>(pthreadt)
#else
#define PRINTABLE_PTHREAD(pthreadt) pthreadt
#endif
// A macro to disallow the evil copy constructor and operator= functions
// This should be used in the private: declarations for a class
#define DISALLOW_EVIL_CONSTRUCTORS(TypeName) \
TypeName(const TypeName&); \
void operator=(const TypeName&)
// An alternate name that leaves out the moral judgment... :-)
#define DISALLOW_COPY_AND_ASSIGN(TypeName) DISALLOW_EVIL_CONSTRUCTORS(TypeName)
// The COMPILE_ASSERT macro can be used to verify that a compile time
// expression is true. For example, you could use it to verify the
// size of a static array:
//
// COMPILE_ASSERT(sizeof(num_content_type_names) == sizeof(int),
// content_type_names_incorrect_size);
//
// or to make sure a struct is smaller than a certain size:
//
// COMPILE_ASSERT(sizeof(foo) < 128, foo_too_large);
//
// The second argument to the macro is the name of the variable. If
// the expression is false, most compilers will issue a warning/error
// containing the name of the variable.
//
// Implementation details of COMPILE_ASSERT:
//
// - COMPILE_ASSERT works by defining an array type that has -1
// elements (and thus is invalid) when the expression is false.
//
// - The simpler definition
//
// #define COMPILE_ASSERT(expr, msg) typedef char msg[(expr) ? 1 : -1]
//
// does not work, as gcc supports variable-length arrays whose sizes
// are determined at run-time (this is gcc's extension and not part
// of the C++ standard). As a result, gcc fails to reject the
// following code with the simple definition:
//
// int foo;
// COMPILE_ASSERT(foo, msg); // not supposed to compile as foo is
// // not a compile-time constant.
//
// - By using the type CompileAssert<(bool(expr))>, we ensures that
// expr is a compile-time constant. (Template arguments must be
// determined at compile-time.)
//
// - The outter parentheses in CompileAssert<(bool(expr))> are necessary
// to work around a bug in gcc 3.4.4 and 4.0.1. If we had written
//
// CompileAssert<bool(expr)>
//
// instead, these compilers will refuse to compile
//
// COMPILE_ASSERT(5 > 0, some_message);
//
// (They seem to think the ">" in "5 > 0" marks the end of the
// template argument list.)
//
// - The array size is (bool(expr) ? 1 : -1), instead of simply
//
// ((expr) ? 1 : -1).
//
// This is to avoid running into a bug in MS VC 7.1, which
// causes ((0.0) ? 1 : -1) to incorrectly evaluate to 1.
template <bool>
struct CompileAssert {
};
#define COMPILE_ASSERT(expr, msg) \
typedef CompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1]
#define arraysize(a) (sizeof(a) / sizeof(*(a)))
#define OFFSETOF_MEMBER(strct, field) \
(reinterpret_cast<char*>(&reinterpret_cast<strct*>(16)->field) - \
reinterpret_cast<char*>(16))
#ifdef HAVE___ATTRIBUTE__
# define ATTRIBUTE_WEAK __attribute__((weak))
# define ATTRIBUTE_NOINLINE __attribute__((noinline))
#else
# define ATTRIBUTE_WEAK
# define ATTRIBUTE_NOINLINE
#endif
// Section attributes are supported for both ELF and Mach-O, but in
// very different ways. Here's the API we provide:
// 1) ATTRIBUTE_SECTION: put this with the declaration of all functions
// you want to be in the same linker section
// 2) DEFINE_ATTRIBUTE_SECTION_VARS: must be called once per unique
// name. You want to make sure this is executed before any
// DECLARE_ATTRIBUTE_SECTION_VARS; the easiest way is to put them
// in the same .cc file. Put this call at the global level.
// 3) INIT_ATTRIBUTE_SECTION_VARS: you can scatter calls to this in
// multiple places to help ensure execution before any
// DECLARE_ATTRIBUTE_SECTION_VARS. You must have at least one
// DEFINE, but you can have many INITs. Put each in its own scope.
// 4) DECLARE_ATTRIBUTE_SECTION_VARS: must be called before using
// ATTRIBUTE_SECTION_START or ATTRIBUTE_SECTION_STOP on a name.
// Put this call at the global level.
// 5) ATTRIBUTE_SECTION_START/ATTRIBUTE_SECTION_STOP: call this to say
// where in memory a given section is. All functions declared with
// ATTRIBUTE_SECTION are guaranteed to be between START and STOP.
#if defined(HAVE___ATTRIBUTE__) && defined(__ELF__)
# define ATTRIBUTE_SECTION(name) __attribute__ ((section (#name)))
// Weak section declaration to be used as a global declaration
// for ATTRIBUTE_SECTION_START|STOP(name) to compile and link
// even without functions with ATTRIBUTE_SECTION(name).
# define DECLARE_ATTRIBUTE_SECTION_VARS(name) \
extern char __start_##name[] ATTRIBUTE_WEAK; \
extern char __stop_##name[] ATTRIBUTE_WEAK
# define INIT_ATTRIBUTE_SECTION_VARS(name) // no-op for ELF
# define DEFINE_ATTRIBUTE_SECTION_VARS(name) // no-op for ELF
// Return void* pointers to start/end of a section of code with functions
// having ATTRIBUTE_SECTION(name), or 0 if no such function exists.
// One must DECLARE_ATTRIBUTE_SECTION(name) for this to compile and link.
# define ATTRIBUTE_SECTION_START(name) (reinterpret_cast<void*>(__start_##name))
# define ATTRIBUTE_SECTION_STOP(name) (reinterpret_cast<void*>(__stop_##name))
# define HAVE_ATTRIBUTE_SECTION_START 1
#elif defined(HAVE___ATTRIBUTE__) && defined(__MACH__)
# define ATTRIBUTE_SECTION(name) __attribute__ ((section ("__TEXT, " #name)))
#include <mach-o/getsect.h>
#include <mach-o/dyld.h>
class AssignAttributeStartEnd {
public:
AssignAttributeStartEnd(const char* name, char** pstart, char** pend) {
// Find out what dynamic library name is defined in
if (_dyld_present()) {
for (int i = _dyld_image_count() - 1; i >= 0; --i) {
const mach_header* hdr = _dyld_get_image_header(i);
#ifdef MH_MAGIC_64
if (hdr->magic == MH_MAGIC_64) {
uint64_t len;
*pstart = getsectdatafromheader_64((mach_header_64*)hdr,
"__TEXT", name, &len);
if (*pstart) { // NULL if not defined in this dynamic library
*pstart += _dyld_get_image_vmaddr_slide(i); // correct for reloc
*pend = *pstart + len;
return;
}
}
#endif
if (hdr->magic == MH_MAGIC) {
uint32_t len;
*pstart = getsectdatafromheader(hdr, "__TEXT", name, &len);
if (*pstart) { // NULL if not defined in this dynamic library
*pstart += _dyld_get_image_vmaddr_slide(i); // correct for reloc
*pend = *pstart + len;
return;
}
}
}
}
// If we get here, not defined in a dll at all. See if defined statically.
unsigned long len; // don't ask me why this type isn't uint32_t too...
*pstart = getsectdata("__TEXT", name, &len);
*pend = *pstart + len;
}
};
#define DECLARE_ATTRIBUTE_SECTION_VARS(name) \
extern char* __start_##name; \
extern char* __stop_##name
#define INIT_ATTRIBUTE_SECTION_VARS(name) \
DECLARE_ATTRIBUTE_SECTION_VARS(name); \
static const AssignAttributeStartEnd __assign_##name( \
#name, &__start_##name, &__stop_##name)
#define DEFINE_ATTRIBUTE_SECTION_VARS(name) \
char* __start_##name, *__stop_##name; \
INIT_ATTRIBUTE_SECTION_VARS(name)
# define ATTRIBUTE_SECTION_START(name) (reinterpret_cast<void*>(__start_##name))
# define ATTRIBUTE_SECTION_STOP(name) (reinterpret_cast<void*>(__stop_##name))
# define HAVE_ATTRIBUTE_SECTION_START 1
#else // not HAVE___ATTRIBUTE__ && __ELF__, nor HAVE___ATTRIBUTE__ && __MACH__
# define ATTRIBUTE_SECTION(name)
# define DECLARE_ATTRIBUTE_SECTION_VARS(name)
# define INIT_ATTRIBUTE_SECTION_VARS(name)
# define DEFINE_ATTRIBUTE_SECTION_VARS(name)
# define ATTRIBUTE_SECTION_START(name) (reinterpret_cast<void*>(0))
# define ATTRIBUTE_SECTION_STOP(name) (reinterpret_cast<void*>(0))
#endif // HAVE___ATTRIBUTE__ and __ELF__ or __MACH__
#if defined(HAVE___ATTRIBUTE__) && (defined(__i386__) || defined(__x86_64__))
# define CACHELINE_SIZE 64
# define CACHELINE_ALIGNED __attribute__((aligned(CACHELINE_SIZE)))
#else
# define CACHELINE_ALIGNED
#endif // defined(HAVE___ATTRIBUTE__) && (__i386__ || __x86_64__)
// The following enum should be used only as a constructor argument to indicate
// that the variable has static storage class, and that the constructor should
// do nothing to its state. It indicates to the reader that it is legal to
// declare a static nistance of the class, provided the constructor is given
// the base::LINKER_INITIALIZED argument. Normally, it is unsafe to declare a
// static variable that has a constructor or a destructor because invocation
// order is undefined. However, IF the type can be initialized by filling with
// zeroes (which the loader does for static variables), AND the destructor also
// does nothing to the storage, then a constructor declared as
// explicit MyClass(base::LinkerInitialized x) {}
// and invoked as
// static MyClass my_variable_name(base::LINKER_INITIALIZED);
namespace base {
enum LinkerInitialized { LINKER_INITIALIZED };
}
#endif // _BASICTYPES_H_

617
compiler-rt/lib/asan/sysinfo/sysinfo.cc
View File

@ -1,617 +0,0 @@
// Copyright (c) 2006, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <assert.h>
#include <stdlib.h> // for getenv()
#include <stdio.h> // for snprintf(), sscanf()
#include <string.h> // for memmove(), memchr(), etc.
#include <fcntl.h> // for open()
#include <errno.h> // for errno
#include <unistd.h> // for read()
#if defined __MACH__ // Mac OS X, almost certainly
#include <mach-o/dyld.h> // for iterating over dll's in ProcMapsIter
#include <mach-o/loader.h> // for iterating over dll's in ProcMapsIter
#include <sys/types.h>
#include <sys/sysctl.h> // how we figure out numcpu's on OS X
#elif defined __FreeBSD__
#include <sys/sysctl.h>
#elif defined __sun__ // Solaris
#include <procfs.h> // for, e.g., prmap_t
#elif defined(PLATFORM_WINDOWS)
#include <process.h> // for getpid() (actually, _getpid())
#include <shlwapi.h> // for SHGetValueA()
#include <tlhelp32.h> // for Module32First()
#endif
#include "sysinfo.h"
#ifdef PLATFORM_WINDOWS
#ifdef MODULEENTRY32
// In a change from the usual W-A pattern, there is no A variant of
// MODULEENTRY32. Tlhelp32.h #defines the W variant, but not the A.
// In unicode mode, tlhelp32.h #defines MODULEENTRY32 to be
// MODULEENTRY32W. These #undefs are the only way I see to get back
// access to the original, ascii struct (and related functions).
#undef MODULEENTRY32
#undef Module32First
#undef Module32Next
#undef PMODULEENTRY32
#undef LPMODULEENTRY32
#endif /* MODULEENTRY32 */
// MinGW doesn't seem to define this, perhaps some windowsen don't either.
#ifndef TH32CS_SNAPMODULE32
#define TH32CS_SNAPMODULE32 0
#endif /* TH32CS_SNAPMODULE32 */
#endif /* PLATFORM_WINDOWS */
// Re-run fn until it doesn't cause EINTR.
#define NO_INTR(fn) do {} while ((fn) < 0 && errno == EINTR)
// open/read/close can set errno, which may be illegal at this
// time, so prefer making the syscalls directly if we can.
#ifdef HAVE_SYS_SYSCALL_H
# include <sys/syscall.h>
# define safeopen(filename, mode) syscall(SYS_open, filename, mode)
# define saferead(fd, buffer, size) syscall(SYS_read, fd, buffer, size)
# define safeclose(fd) syscall(SYS_close, fd)
#else
# define safeopen(filename, mode) open(filename, mode)
# define saferead(fd, buffer, size) read(fd, buffer, size)
# define safeclose(fd) close(fd)
#endif
// ----------------------------------------------------------------------
// HasPosixThreads()
// Return true if we're running POSIX (e.g., NPTL on Linux)
// threads, as opposed to a non-POSIX thread libary. The thing
// that we care about is whether a thread's pid is the same as
// the thread that spawned it. If so, this function returns
// true.
// ----------------------------------------------------------------------
bool HasPosixThreads() {
#if defined(__linux__) and !defined(ANDROID)
#ifndef _CS_GNU_LIBPTHREAD_VERSION
#define _CS_GNU_LIBPTHREAD_VERSION 3
#endif
char buf[32];
// We assume that, if confstr() doesn't know about this name, then
// the same glibc is providing LinuxThreads.
if (confstr(_CS_GNU_LIBPTHREAD_VERSION, buf, sizeof(buf)) == 0)
return false;
return strncmp(buf, "NPTL", 4) == 0;
#elif defined(PLATFORM_WINDOWS) || defined(__CYGWIN__) || defined(__CYGWIN32__)
return false;
#else // other OS
return true; // Assume that everything else has Posix
#endif // else OS_LINUX
}
// ----------------------------------------------------------------------
#define CHECK_LT(x, y) do { assert((x) < (y)); } while (0)
#if defined __linux__ || defined __FreeBSD__ || defined __sun__ || defined __CYGWIN__ || defined __CYGWIN32__
static void ConstructFilename(const char* spec, pid_t pid,
char* buf, int buf_size) {
CHECK_LT(snprintf(buf, buf_size,
spec,
static_cast<int>(pid ? pid : getpid())), buf_size);
}
#endif
// A templatized helper function instantiated for Mach (OS X) only.
// It can handle finding info for both 32 bits and 64 bits.
// Returns true if it successfully handled the hdr, false else.
#ifdef __MACH__ // Mac OS X, almost certainly
template<uint32_t kMagic, uint32_t kLCSegment,
typename MachHeader, typename SegmentCommand>
static bool NextExtMachHelper(const mach_header* hdr,
int current_image, int current_load_cmd,
uint64 *start, uint64 *end, char **flags,
uint64 *offset, int64 *inode, char **filename,
uint64 *file_mapping, uint64 *file_pages,
uint64 *anon_mapping, uint64 *anon_pages,
dev_t *dev) {
static char kDefaultPerms[5] = "r-xp";
if (hdr->magic != kMagic)
return false;
const char* lc = (const char *)hdr + sizeof(MachHeader);
// TODO(csilvers): make this not-quadradic (increment and hold state)
for (int j = 0; j < current_load_cmd; j++) // advance to *our* load_cmd
lc += ((const load_command *)lc)->cmdsize;
if (((const load_command *)lc)->cmd == kLCSegment) {
const intptr_t dlloff = _dyld_get_image_vmaddr_slide(current_image);
const SegmentCommand* sc = (const SegmentCommand *)lc;
if (start) *start = sc->vmaddr + dlloff;
if (end) *end = sc->vmaddr + sc->vmsize + dlloff;
if (flags) *flags = kDefaultPerms; // can we do better?
if (offset) *offset = sc->fileoff;
if (inode) *inode = 0;
if (filename)
*filename = const_cast<char*>(_dyld_get_image_name(current_image));
if (file_mapping) *file_mapping = 0;
if (file_pages) *file_pages = 0; // could we use sc->filesize?
if (anon_mapping) *anon_mapping = 0;
if (anon_pages) *anon_pages = 0;
if (dev) *dev = 0;
return true;
}
return false;
}
#endif
ProcMapsIterator::ProcMapsIterator(pid_t pid) {
Init(pid, NULL, false);
}
ProcMapsIterator::ProcMapsIterator(pid_t pid, Buffer *buffer) {
Init(pid, buffer, false);
}
ProcMapsIterator::ProcMapsIterator(pid_t pid, Buffer *buffer,
bool use_maps_backing) {
Init(pid, buffer, use_maps_backing);
}
void ProcMapsIterator::Init(pid_t pid, Buffer *buffer,
bool use_maps_backing) {
pid_ = pid;
using_maps_backing_ = use_maps_backing;
dynamic_buffer_ = NULL;
if (!buffer) {
// If the user didn't pass in any buffer storage, allocate it
// now. This is the normal case; the signal handler passes in a
// static buffer.
buffer = dynamic_buffer_ = new Buffer;
} else {
dynamic_buffer_ = NULL;
}
ibuf_ = buffer->buf_;
stext_ = etext_ = nextline_ = ibuf_;
ebuf_ = ibuf_ + Buffer::kBufSize - 1;
nextline_ = ibuf_;
#if defined(__linux__) || defined(__CYGWIN__) || defined(__CYGWIN32__)
if (use_maps_backing) { // don't bother with clever "self" stuff in this case
ConstructFilename("/proc/%d/maps_backing", pid, ibuf_, Buffer::kBufSize);
} else if (pid == 0) {
// We have to kludge a bit to deal with the args ConstructFilename
// expects. The 1 is never used -- it's only impt. that it's not 0.
ConstructFilename("/proc/self/maps", 1, ibuf_, Buffer::kBufSize);
} else {
ConstructFilename("/proc/%d/maps", pid, ibuf_, Buffer::kBufSize);
}
// No error logging since this can be called from the crash dump
// handler at awkward moments. Users should call Valid() before
// using.
NO_INTR(fd_ = open(ibuf_, O_RDONLY));
#elif defined(__FreeBSD__)
// We don't support maps_backing on freebsd
if (pid == 0) {
ConstructFilename("/proc/curproc/map", 1, ibuf_, Buffer::kBufSize);
} else {
ConstructFilename("/proc/%d/map", pid, ibuf_, Buffer::kBufSize);
}
NO_INTR(fd_ = open(ibuf_, O_RDONLY));
#elif defined(__sun__)
if (pid == 0) {
ConstructFilename("/proc/self/map", 1, ibuf_, Buffer::kBufSize);
} else {
ConstructFilename("/proc/%d/map", pid, ibuf_, Buffer::kBufSize);
}
NO_INTR(fd_ = open(ibuf_, O_RDONLY));
#elif defined(__MACH__)
current_image_ = _dyld_image_count(); // count down from the top
current_load_cmd_ = -1;
#elif defined(PLATFORM_WINDOWS)
snapshot_ = CreateToolhelp32Snapshot(TH32CS_SNAPMODULE |
TH32CS_SNAPMODULE32,
GetCurrentProcessId());
memset(&module_, 0, sizeof(module_));
#else
fd_ = -1; // so Valid() is always false
#endif
}
ProcMapsIterator::~ProcMapsIterator() {
#if defined(PLATFORM_WINDOWS)
if (snapshot_ != INVALID_HANDLE_VALUE) CloseHandle(snapshot_);
#elif defined(__MACH__)
// no cleanup necessary!
#else
if (fd_ >= 0) NO_INTR(close(fd_));
#endif
delete dynamic_buffer_;
}
bool ProcMapsIterator::Valid() const {
#if defined(PLATFORM_WINDOWS)
return snapshot_ != INVALID_HANDLE_VALUE;
#elif defined(__MACH__)
return 1;
#else
return fd_ != -1;
#endif
}
bool ProcMapsIterator::Next(uint64 *start, uint64 *end, char **flags,
uint64 *offset, int64 *inode, char **filename) {
return NextExt(start, end, flags, offset, inode, filename, NULL, NULL,
NULL, NULL, NULL);
}
// This has too many arguments. It should really be building
// a map object and returning it. The problem is that this is called
// when the memory allocator state is undefined, hence the arguments.
bool ProcMapsIterator::NextExt(uint64 *start, uint64 *end, char **flags,
uint64 *offset, int64 *inode, char **filename,
uint64 *file_mapping, uint64 *file_pages,
uint64 *anon_mapping, uint64 *anon_pages,
dev_t *dev) {
#if defined(__linux__) || defined(__FreeBSD__) || defined(__CYGWIN__) || defined(__CYGWIN32__)
do {
// Advance to the start of the next line
stext_ = nextline_;
// See if we have a complete line in the buffer already
nextline_ = static_cast<char *>(memchr (stext_, '\n', etext_ - stext_));
if (!nextline_) {
// Shift/fill the buffer so we do have a line
int count = etext_ - stext_;
// Move the current text to the start of the buffer
memmove(ibuf_, stext_, count);
stext_ = ibuf_;
etext_ = ibuf_ + count;
int nread = 0; // fill up buffer with text
while (etext_ < ebuf_) {
NO_INTR(nread = read(fd_, etext_, ebuf_ - etext_));
if (nread > 0)
etext_ += nread;
else
break;
}
// Zero out remaining characters in buffer at EOF to avoid returning
// garbage from subsequent calls.
if (etext_ != ebuf_ && nread == 0) {
memset(etext_, 0, ebuf_ - etext_);
}
*etext_ = '\n'; // sentinel; safe because ibuf extends 1 char beyond ebuf
nextline_ = static_cast<char *>(memchr (stext_, '\n', etext_ + 1 - stext_));
}
*nextline_ = 0; // turn newline into nul
nextline_ += ((nextline_ < etext_)? 1 : 0); // skip nul if not end of text
// stext_ now points at a nul-terminated line
uint64 tmpstart, tmpend, tmpoffset;
int64 tmpinode;
int major, minor;
unsigned filename_offset = 0;
#if defined(__linux__)
// for now, assume all linuxes have the same format
if (sscanf(stext_, "%"SCNx64"-%"SCNx64" %4s %"SCNx64" %x:%x %"SCNd64" %n",
(unsigned long long *)(start ? start : &tmpstart),
(unsigned long long *)(end ? end : &tmpend),
flags_,
(unsigned long long *)(offset ? offset : &tmpoffset),
&major, &minor,
(unsigned long long *)(inode ? inode : &tmpinode),
&filename_offset) != 7) continue;
#elif defined(__CYGWIN__) || defined(__CYGWIN32__)
// cygwin is like linux, except the third field is the "entry point"
// rather than the offset (see format_process_maps at
// http://cygwin.com/cgi-bin/cvsweb.cgi/src/winsup/cygwin/fhandler_process.cc?rev=1.89&content-type=text/x-cvsweb-markup&cvsroot=src
// Offset is always be 0 on cygwin: cygwin implements an mmap
// by loading the whole file and then calling NtMapViewOfSection.
// Cygwin also seems to set its flags kinda randomly; use windows default.
char tmpflags[5];
if (offset)
*offset = 0;
strcpy(flags_, "r-xp");
if (sscanf(stext_, "%llx-%llx %4s %llx %x:%x %lld %n",
start ? start : &tmpstart,
end ? end : &tmpend,
tmpflags,
&tmpoffset,
&major, &minor,
inode ? inode : &tmpinode, &filename_offset) != 7) continue;
#elif defined(__FreeBSD__)
// For the format, see http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/fs/procfs/procfs_map.c?rev=1.31&content-type=text/x-cvsweb-markup
tmpstart = tmpend = tmpoffset = 0;
tmpinode = 0;
major = minor = 0; // can't get this info in freebsd
if (inode)
*inode = 0; // nor this
if (offset)
*offset = 0; // seems like this should be in there, but maybe not
// start end resident privateresident obj(?) prot refcnt shadowcnt
// flags copy_on_write needs_copy type filename:
// 0x8048000 0x804a000 2 0 0xc104ce70 r-x 1 0 0x0 COW NC vnode /bin/cat
if (sscanf(stext_, "0x%"SCNx64" 0x%"SCNx64" %*d %*d %*p %3s %*d %*d 0x%*x %*s %*s %*s %n",
start ? start : &tmpstart,
end ? end : &tmpend,
flags_,
&filename_offset) != 3) continue;
#endif
// Depending on the Linux kernel being used, there may or may not be a space
// after the inode if there is no filename. sscanf will in such situations
// nondeterministically either fill in filename_offset or not (the results
// differ on multiple calls in the same run even with identical arguments).
// We don't want to wander off somewhere beyond the end of the string.
size_t stext_length = strlen(stext_);
if (filename_offset == 0 || filename_offset > stext_length)
filename_offset = stext_length;
// We found an entry
if (flags) *flags = flags_;
if (filename) *filename = stext_ + filename_offset;
if (dev) *dev = minor | (major << 8);
if (using_maps_backing_) {
// Extract and parse physical page backing info.
char *backing_ptr = stext_ + filename_offset +
strlen(stext_+filename_offset);
// find the second '('
int paren_count = 0;
while (--backing_ptr > stext_) {
if (*backing_ptr == '(') {
++paren_count;
if (paren_count >= 2) {
uint64 tmp_file_mapping;
uint64 tmp_file_pages;
uint64 tmp_anon_mapping;
uint64 tmp_anon_pages;
sscanf(backing_ptr+1, "F %"SCNx64" %"SCNd64") (A %"SCNx64" %"SCNd64")",
(unsigned long long *)(file_mapping ?
file_mapping : &tmp_file_mapping),
(unsigned long long *)(file_pages ?
file_pages : &tmp_file_pages),
(unsigned long long *)(anon_mapping
? anon_mapping : &tmp_anon_mapping),
(unsigned long long *)(anon_pages
? anon_pages : &tmp_anon_pages));
// null terminate the file name (there is a space
// before the first (.
backing_ptr[-1] = 0;
break;
}
}
}
}
return true;
} while (etext_ > ibuf_);
#elif defined(__sun__)
// This is based on MA_READ == 4, MA_WRITE == 2, MA_EXEC == 1
static char kPerms[8][4] = { "---", "--x", "-w-", "-wx",
"r--", "r-x", "rw-", "rwx" };
COMPILE_ASSERT(MA_READ == 4, solaris_ma_read_must_equal_4);
COMPILE_ASSERT(MA_WRITE == 2, solaris_ma_write_must_equal_2);
COMPILE_ASSERT(MA_EXEC == 1, solaris_ma_exec_must_equal_1);
Buffer object_path;
int nread = 0; // fill up buffer with text
NO_INTR(nread = read(fd_, ibuf_, sizeof(prmap_t)));
if (nread == sizeof(prmap_t)) {
long inode_from_mapname = 0;
prmap_t* mapinfo = reinterpret_cast<prmap_t*>(ibuf_);
// Best-effort attempt to get the inode from the filename. I think the
// two middle ints are major and minor device numbers, but I'm not sure.
sscanf(mapinfo->pr_mapname, "ufs.%*d.%*d.%ld", &inode_from_mapname);
if (pid_ == 0) {
CHECK_LT(snprintf(object_path.buf_, Buffer::kBufSize,
"/proc/self/path/%s", mapinfo->pr_mapname),
Buffer::kBufSize);
} else {
CHECK_LT(snprintf(object_path.buf_, Buffer::kBufSize,
"/proc/%d/path/%s",
static_cast<int>(pid_), mapinfo->pr_mapname),
Buffer::kBufSize);
}
ssize_t len = readlink(object_path.buf_, current_filename_, PATH_MAX);
CHECK_LT(len, PATH_MAX);
if (len < 0)
len = 0;
current_filename_[len] = '\0';
if (start) *start = mapinfo->pr_vaddr;
if (end) *end = mapinfo->pr_vaddr + mapinfo->pr_size;
if (flags) *flags = kPerms[mapinfo->pr_mflags & 7];
if (offset) *offset = mapinfo->pr_offset;
if (inode) *inode = inode_from_mapname;
if (filename) *filename = current_filename_;
if (file_mapping) *file_mapping = 0;
if (file_pages) *file_pages = 0;
if (anon_mapping) *anon_mapping = 0;
if (anon_pages) *anon_pages = 0;
if (dev) *dev = 0;
return true;
}
#elif defined(__MACH__)
// We return a separate entry for each segment in the DLL. (TODO(csilvers):
// can we do better?) A DLL ("image") has load-commands, some of which
// talk about segment boundaries.
// cf image_for_address from http://svn.digium.com/view/asterisk/team/oej/minivoicemail/dlfcn.c?revision=53912
for (; current_image_ >= 0; current_image_--) {
const mach_header* hdr = _dyld_get_image_header(current_image_);
if (!hdr) continue;
if (current_load_cmd_ < 0) // set up for this image
current_load_cmd_ = hdr->ncmds; // again, go from the top down
// We start with the next load command (we've already looked at this one).
for (current_load_cmd_--; current_load_cmd_ >= 0; current_load_cmd_--) {
#ifdef MH_MAGIC_64
if (NextExtMachHelper<MH_MAGIC_64, LC_SEGMENT_64,
struct mach_header_64, struct segment_command_64>(
hdr, current_image_, current_load_cmd_,
start, end, flags, offset, inode, filename,
file_mapping, file_pages, anon_mapping,
anon_pages, dev)) {
return true;
}
#endif
if (NextExtMachHelper<MH_MAGIC, LC_SEGMENT,
struct mach_header, struct segment_command>(
hdr, current_image_, current_load_cmd_,
start, end, flags, offset, inode, filename,
file_mapping, file_pages, anon_mapping,
anon_pages, dev)) {
return true;
}
}
// If we get here, no more load_cmd's in this image talk about
// segments. Go on to the next image.
}
#elif defined(PLATFORM_WINDOWS)
static char kDefaultPerms[5] = "r-xp";
BOOL ok;
if (module_.dwSize == 0) { // only possible before first call
module_.dwSize = sizeof(module_);
ok = Module32First(snapshot_, &module_);
} else {
ok = Module32Next(snapshot_, &module_);
}
if (ok) {
uint64 base_addr = reinterpret_cast<DWORD_PTR>(module_.modBaseAddr);
if (start) *start = base_addr;
if (end) *end = base_addr + module_.modBaseSize;
if (flags) *flags = kDefaultPerms;
if (offset) *offset = 0;
if (inode) *inode = 0;
if (filename) *filename = module_.szExePath;
if (file_mapping) *file_mapping = 0;
if (file_pages) *file_pages = 0;
if (anon_mapping) *anon_mapping = 0;
if (anon_pages) *anon_pages = 0;
if (dev) *dev = 0;
return true;
}
#endif
// We didn't find anything
return false;
}
int ProcMapsIterator::FormatLine(char* buffer, int bufsize,
uint64 start, uint64 end, const char *flags,
uint64 offset, int64 inode,
const char *filename, dev_t dev) {
// We assume 'flags' looks like 'rwxp' or 'rwx'.
char r = (flags && flags[0] == 'r') ? 'r' : '-';
char w = (flags && flags[0] && flags[1] == 'w') ? 'w' : '-';
char x = (flags && flags[0] && flags[1] && flags[2] == 'x') ? 'x' : '-';
// p always seems set on linux, so we set the default to 'p', not '-'
char p = (flags && flags[0] && flags[1] && flags[2] && flags[3] != 'p')
? '-' : 'p';
const int rc = snprintf(buffer, bufsize,
"%08"PRIx64"-%08"PRIx64" %c%c%c%c %08"PRIx64" %02x:%02x %-11"PRId64" %s\n",
(unsigned long long)start, (unsigned long long)end, r,w,x,p,
(unsigned long long)offset,
static_cast<int>(dev/256), static_cast<int>(dev%256),
(unsigned long long)inode, filename);
return (rc < 0 || rc >= bufsize) ? 0 : rc;
}
// Helper to add the list of mapped shared libraries to a profile.
// Fill formatted "/proc/self/maps" contents into buffer 'buf' of size 'size'
// and return the actual size occupied in 'buf'. We fill wrote_all to true
// if we successfully wrote all proc lines to buf, false else.
// We do not provision for 0-terminating 'buf'.
int FillProcSelfMaps(char buf[], int size, bool* wrote_all) {
ProcMapsIterator::Buffer iterbuf;
ProcMapsIterator it(0, &iterbuf); // 0 means "current pid"
uint64 start, end, offset;
int64 inode;
char *flags, *filename;
int bytes_written = 0;
*wrote_all = true;
while (it.Next(&start, &end, &flags, &offset, &inode, &filename)) {
const int line_length = it.FormatLine(buf + bytes_written,
size - bytes_written,
start, end, flags, offset,
inode, filename, 0);
if (line_length == 0)
*wrote_all = false; // failed to write this line out
else
bytes_written += line_length;
}
return bytes_written;
}
// Dump the same data as FillProcSelfMaps reads to fd.
// It seems easier to repeat parts of FillProcSelfMaps here than to
// reuse it via a call.
void DumpProcSelfMaps(RawFD fd) {
ProcMapsIterator::Buffer iterbuf;
ProcMapsIterator it(0, &iterbuf); // 0 means "current pid"
uint64 start, end, offset;
int64 inode;
char *flags, *filename;
ProcMapsIterator::Buffer linebuf;
while (it.Next(&start, &end, &flags, &offset, &inode, &filename)) {
int written = it.FormatLine(linebuf.buf_, sizeof(linebuf.buf_),
start, end, flags, offset, inode, filename,
0);
RawWrite(fd, linebuf.buf_, written);
}
}
// Re-run fn until it doesn't cause EINTR.
#define NO_INTR(fn) do {} while ((fn) < 0 && errno == EINTR)
RawFD RawOpenForWriting(const char* filename) {
return open(filename, O_WRONLY|O_CREAT|O_TRUNC, 0664);
}
void RawWrite(RawFD fd, const char* buf, size_t len) {
while (len > 0) {
ssize_t r;
NO_INTR(r = write(fd, buf, len));
if (r <= 0) break;
buf += r;
len -= r;
}
}
void RawClose(RawFD fd) {
NO_INTR(close(fd));
}

234
compiler-rt/lib/asan/sysinfo/sysinfo.h
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@ -1,234 +0,0 @@
// Copyright (c) 2006, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// All functions here are thread-hostile due to file caching unless
// commented otherwise.
#ifndef _SYSINFO_H_
#define _SYSINFO_H_
#include <time.h>
#if (defined(_WIN32) || defined(__MINGW32__)) && (!defined(__CYGWIN__) && !defined(__CYGWIN32__))
#include <windows.h> // for DWORD
#include <TlHelp32.h> // for CreateToolhelp32Snapshot
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h> // for pid_t
#endif
#include <stddef.h> // for size_t
#include <limits.h> // for PATH_MAX
#include "basictypes.h"
// This getenv function is safe to call before the C runtime is initialized.
// On Windows, it utilizes GetEnvironmentVariable() and on unix it uses
// /proc/self/environ instead calling getenv(). It's intended to be used in
// routines that run before main(), when the state required for getenv() may
// not be set up yet. In particular, errno isn't set up until relatively late
// (after the pthreads library has a chance to make it threadsafe), and
// getenv() doesn't work until then.
// On some platforms, this call will utilize the same, static buffer for
// repeated GetenvBeforeMain() calls. Callers should not expect pointers from
// this routine to be long lived.
// Note that on unix, /proc only has the environment at the time the
// application was started, so this routine ignores setenv() calls/etc. Also
// note it only reads the first 16K of the environment.
extern const char* GetenvBeforeMain(const char* name);
// This takes as an argument an environment-variable name (like
// CPUPROFILE) whose value is supposed to be a file-path, and sets
// path to that path, and returns true. Non-trivial for surprising
// reasons, as documented in sysinfo.cc. path must have space PATH_MAX.
extern bool GetUniquePathFromEnv(const char* env_name, char* path);
extern int NumCPUs();
// processor cycles per second of each processor. Thread-safe.
extern double CyclesPerSecond(void);
// Return true if we're running POSIX (e.g., NPTL on Linux) threads,
// as opposed to a non-POSIX thread libary. The thing that we care
// about is whether a thread's pid is the same as the thread that
// spawned it. If so, this function returns true.
// Thread-safe.
// Note: We consider false negatives to be OK.
bool HasPosixThreads();
#ifndef SWIG // SWIG doesn't like struct Buffer and variable arguments.
// A ProcMapsIterator abstracts access to /proc/maps for a given
// process. Needs to be stack-allocatable and avoid using stdio/malloc
// so it can be used in the google stack dumper, heap-profiler, etc.
//
// On Windows and Mac OS X, this iterator iterates *only* over DLLs
// mapped into this process space. For Linux, FreeBSD, and Solaris,
// it iterates over *all* mapped memory regions, including anonymous
// mmaps. For other O/Ss, it is unlikely to work at all, and Valid()
// will always return false. Also note: this routine only works on
// FreeBSD if procfs is mounted: make sure this is in your /etc/fstab:
// proc /proc procfs rw 0 0
class ProcMapsIterator {
public:
struct Buffer {
#ifdef __FreeBSD__
// FreeBSD requires us to read all of the maps file at once, so
// we have to make a buffer that's "always" big enough
static const size_t kBufSize = 102400;
#else // a one-line buffer is good enough
static const size_t kBufSize = PATH_MAX + 1024;
#endif
char buf_[kBufSize];
};
// Create a new iterator for the specified pid. pid can be 0 for "self".
explicit ProcMapsIterator(pid_t pid);
// Create an iterator with specified storage (for use in signal
// handler). "buffer" should point to a ProcMapsIterator::Buffer
// buffer can be NULL in which case a bufer will be allocated.
ProcMapsIterator(pid_t pid, Buffer *buffer);
// Iterate through maps_backing instead of maps if use_maps_backing
// is true. Otherwise the same as above. buffer can be NULL and
// it will allocate a buffer itself.
ProcMapsIterator(pid_t pid, Buffer *buffer,
bool use_maps_backing);
// Returns true if the iterator successfully initialized;
bool Valid() const;
// Returns a pointer to the most recently parsed line. Only valid
// after Next() returns true, and until the iterator is destroyed or
// Next() is called again. This may give strange results on non-Linux
// systems. Prefer FormatLine() if that may be a concern.
const char *CurrentLine() const { return stext_; }
// Writes the "canonical" form of the /proc/xxx/maps info for a single
// line to the passed-in buffer. Returns the number of bytes written,
// or 0 if it was not able to write the complete line. (To guarantee
// success, buffer should have size at least Buffer::kBufSize.)
// Takes as arguments values set via a call to Next(). The
// "canonical" form of the line (taken from linux's /proc/xxx/maps):
// <start_addr(hex)>-<end_addr(hex)> <perms(rwxp)> <offset(hex)> +
// <major_dev(hex)>:<minor_dev(hex)> <inode> <filename> Note: the
// eg
// 08048000-0804c000 r-xp 00000000 03:01 3793678 /bin/cat
// If you don't have the dev_t (dev), feel free to pass in 0.
// (Next() doesn't return a dev_t, though NextExt does.)
//
// Note: if filename and flags were obtained via a call to Next(),
// then the output of this function is only valid if Next() returned
// true, and only until the iterator is destroyed or Next() is
// called again. (Since filename, at least, points into CurrentLine.)
static int FormatLine(char* buffer, int bufsize,
uint64 start, uint64 end, const char *flags,
uint64 offset, int64 inode, const char *filename,
dev_t dev);
// Find the next entry in /proc/maps; return true if found or false
// if at the end of the file.
//
// Any of the result pointers can be NULL if you're not interested
// in those values.
//
// If "flags" and "filename" are passed, they end up pointing to
// storage within the ProcMapsIterator that is valid only until the
// iterator is destroyed or Next() is called again. The caller may
// modify the contents of these strings (up as far as the first NUL,
// and only until the subsequent call to Next()) if desired.
// The offsets are all uint64 in order to handle the case of a
// 32-bit process running on a 64-bit kernel
//
// IMPORTANT NOTE: see top-of-class notes for details about what
// mapped regions Next() iterates over, depending on O/S.
// TODO(csilvers): make flags and filename const.
bool Next(uint64 *start, uint64 *end, char **flags,
uint64 *offset, int64 *inode, char **filename);
bool NextExt(uint64 *start, uint64 *end, char **flags,
uint64 *offset, int64 *inode, char **filename,
uint64 *file_mapping, uint64 *file_pages,
uint64 *anon_mapping, uint64 *anon_pages,
dev_t *dev);
~ProcMapsIterator();
private:
void Init(pid_t pid, Buffer *buffer, bool use_maps_backing);
char *ibuf_; // input buffer
char *stext_; // start of text
char *etext_; // end of text
char *nextline_; // start of next line
char *ebuf_; // end of buffer (1 char for a nul)
#if (defined(_WIN32) || defined(__MINGW32__)) && (!defined(__CYGWIN__) && !defined(__CYGWIN32__))
HANDLE snapshot_; // filehandle on dll info
// In a change from the usual W-A pattern, there is no A variant of
// MODULEENTRY32. Tlhelp32.h #defines the W variant, but not the A.
// We want the original A variants, and this #undef is the only
// way I see to get them. Redefining it when we're done prevents us
// from affecting other .cc files.
# ifdef MODULEENTRY32 // Alias of W
# undef MODULEENTRY32
MODULEENTRY32 module_; // info about current dll (and dll iterator)
# define MODULEENTRY32 MODULEENTRY32W
# else // It's the ascii, the one we want.
MODULEENTRY32 module_; // info about current dll (and dll iterator)
# endif
#elif defined(__MACH__)
int current_image_; // dll's are called "images" in macos parlance
int current_load_cmd_; // the segment of this dll we're examining
#elif defined(__sun__) // Solaris
int fd_;
char current_filename_[PATH_MAX];
#else
int fd_; // filehandle on /proc/*/maps
#endif
pid_t pid_;
char flags_[10];
Buffer* dynamic_buffer_; // dynamically-allocated Buffer
bool using_maps_backing_; // true if we are looking at maps_backing instead of maps.
};
#endif /* #ifndef SWIG */
// Helper routines
typedef int RawFD;
const RawFD kIllegalRawFD = -1; // what open returns if it fails
RawFD RawOpenForWriting(const char* filename); // uses default permissions
void RawWrite(RawFD fd, const char* buf, size_t len);
void RawClose(RawFD fd);
int FillProcSelfMaps(char buf[], int size, bool* wrote_all);
void DumpProcSelfMaps(RawFD fd);
#endif /* #ifndef _SYSINFO_H_ */