http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/internal/symbolize.h ---------------------------------------------------------------------- diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/internal/symbolize.h b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/internal/symbolize.h new file mode 100644 index 0000000..7ae1383 --- /dev/null +++ b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/internal/symbolize.h @@ -0,0 +1,122 @@ +// Copyright 2018 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// This file contains internal parts of the Abseil symbolizer. +// Do not depend on the anything in this file, it may change at anytime. + +#ifndef ABSL_DEBUGGING_INTERNAL_SYMBOLIZE_H_ +#define ABSL_DEBUGGING_INTERNAL_SYMBOLIZE_H_ + +#include <cstddef> +#include <cstdint> + +#ifdef ABSL_INTERNAL_HAVE_ELF_SYMBOLIZE +#error ABSL_INTERNAL_HAVE_ELF_SYMBOLIZE cannot be directly set +#elif defined(__ELF__) && defined(__GLIBC__) && !defined(__native_client__) && \ + !defined(__asmjs__) && !defined(__wasm__) +#define ABSL_INTERNAL_HAVE_ELF_SYMBOLIZE 1 + +#include <elf.h> +#include <link.h> // For ElfW() macro. +#include <functional> +#include <string> + +namespace absl { +namespace debugging_internal { + +// Iterates over all sections, invoking callback on each with the section name +// and the section header. +// +// Returns true on success; otherwise returns false in case of errors. +// +// This is not async-signal-safe. +bool ForEachSection( + int fd, const std::function<bool(const std::string& name, const ElfW(Shdr) &)>& + callback); + +// Gets the section header for the given name, if it exists. Returns true on +// success. Otherwise, returns false. +bool GetSectionHeaderByName(int fd, const char *name, size_t name_len, + ElfW(Shdr) *out); + +} // namespace debugging_internal +} // namespace absl + +#endif // ABSL_INTERNAL_HAVE_ELF_SYMBOLIZE + +namespace absl { +namespace debugging_internal { + +struct SymbolDecoratorArgs { + // The program counter we are getting symbolic name for. + const void *pc; + // 0 for main executable, load address for shared libraries. + ptrdiff_t relocation; + // Read-only file descriptor for ELF image covering "pc", + // or -1 if no such ELF image exists in /proc/self/maps. + int fd; + // Output buffer, size. + // Note: the buffer may not be empty -- default symbolizer may have already + // produced some output, and earlier decorators may have adorned it in + // some way. You are free to replace or augment the contents (within the + // symbol_buf_size limit). + char *const symbol_buf; + size_t symbol_buf_size; + // Temporary scratch space, size. + // Use that space in preference to allocating your own stack buffer to + // conserve stack. + char *const tmp_buf; + size_t tmp_buf_size; + // User-provided argument + void* arg; +}; +using SymbolDecorator = void (*)(const SymbolDecoratorArgs *); + +// Installs a function-pointer as a decorator. Returns a value less than zero +// if the system cannot install the decorator. Otherwise, returns a unique +// identifier corresponding to the decorator. This identifier can be used to +// uninstall the decorator - See RemoveSymbolDecorator() below. +int InstallSymbolDecorator(SymbolDecorator decorator, void* arg); + +// Removes a previously installed function-pointer decorator. Parameter "ticket" +// is the return-value from calling InstallSymbolDecorator(). +bool RemoveSymbolDecorator(int ticket); + +// Remove all installed decorators. Returns true if successful, false if +// symbolization is currently in progress. +bool RemoveAllSymbolDecorators(void); + +// Registers an address range to a file mapping. +// +// Preconditions: +// start <= end +// filename != nullptr +// +// Returns true if the file was successfully registered. +bool RegisterFileMappingHint( + const void* start, const void* end, uint64_t offset, const char* filename); + +// Looks up the file mapping registered by RegisterFileMappingHint for an +// address range. If there is one, the file name is stored in *filename and +// *start and *end are modified to reflect the registered mapping. Returns +// whether any hint was found. +bool GetFileMappingHint(const void** start, + const void** end, + uint64_t * offset, + const char** filename); + +} // namespace debugging_internal +} // namespace absl + +#endif // ABSL_DEBUGGING_INTERNAL_SYMBOLIZE_H_
http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/internal/vdso_support.cc ---------------------------------------------------------------------- diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/internal/vdso_support.cc b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/internal/vdso_support.cc new file mode 100644 index 0000000..44ec7c0 --- /dev/null +++ b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/internal/vdso_support.cc @@ -0,0 +1,192 @@ +// Copyright 2017 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Allow dynamic symbol lookup in the kernel VDSO page. +// +// VDSOSupport -- a class representing kernel VDSO (if present). + +#include "absl/debugging/internal/vdso_support.h" + +#ifdef ABSL_HAVE_VDSO_SUPPORT // defined in vdso_support.h + +#include <errno.h> +#include <fcntl.h> +#include <sys/syscall.h> +#include <unistd.h> + +#if __GLIBC_PREREQ(2, 16) // GLIBC-2.16 implements getauxval. +#include <sys/auxv.h> +#endif + +#include "absl/base/dynamic_annotations.h" +#include "absl/base/internal/raw_logging.h" +#include "absl/base/port.h" + +#ifndef AT_SYSINFO_EHDR +#define AT_SYSINFO_EHDR 33 // for crosstoolv10 +#endif + +namespace absl { +namespace debugging_internal { + +ABSL_CONST_INIT +std::atomic<const void *> VDSOSupport::vdso_base_( + debugging_internal::ElfMemImage::kInvalidBase); + +std::atomic<VDSOSupport::GetCpuFn> VDSOSupport::getcpu_fn_(&InitAndGetCPU); +VDSOSupport::VDSOSupport() + // If vdso_base_ is still set to kInvalidBase, we got here + // before VDSOSupport::Init has been called. Call it now. + : image_(vdso_base_.load(std::memory_order_relaxed) == + debugging_internal::ElfMemImage::kInvalidBase + ? Init() + : vdso_base_.load(std::memory_order_relaxed)) {} + +// NOTE: we can't use GoogleOnceInit() below, because we can be +// called by tcmalloc, and none of the *once* stuff may be functional yet. +// +// In addition, we hope that the VDSOSupportHelper constructor +// causes this code to run before there are any threads, and before +// InitGoogle() has executed any chroot or setuid calls. +// +// Finally, even if there is a race here, it is harmless, because +// the operation should be idempotent. +const void *VDSOSupport::Init() { + const auto kInvalidBase = debugging_internal::ElfMemImage::kInvalidBase; +#if __GLIBC_PREREQ(2, 16) + if (vdso_base_.load(std::memory_order_relaxed) == kInvalidBase) { + errno = 0; + const void *const sysinfo_ehdr = + reinterpret_cast<const void *>(getauxval(AT_SYSINFO_EHDR)); + if (errno == 0) { + vdso_base_.store(sysinfo_ehdr, std::memory_order_relaxed); + } + } +#endif // __GLIBC_PREREQ(2, 16) + if (vdso_base_.load(std::memory_order_relaxed) == kInvalidBase) { + // Valgrind zaps AT_SYSINFO_EHDR and friends from the auxv[] + // on stack, and so glibc works as if VDSO was not present. + // But going directly to kernel via /proc/self/auxv below bypasses + // Valgrind zapping. So we check for Valgrind separately. + if (RunningOnValgrind()) { + vdso_base_.store(nullptr, std::memory_order_relaxed); + getcpu_fn_.store(&GetCPUViaSyscall, std::memory_order_relaxed); + return nullptr; + } + int fd = open("/proc/self/auxv", O_RDONLY); + if (fd == -1) { + // Kernel too old to have a VDSO. + vdso_base_.store(nullptr, std::memory_order_relaxed); + getcpu_fn_.store(&GetCPUViaSyscall, std::memory_order_relaxed); + return nullptr; + } + ElfW(auxv_t) aux; + while (read(fd, &aux, sizeof(aux)) == sizeof(aux)) { + if (aux.a_type == AT_SYSINFO_EHDR) { + vdso_base_.store(reinterpret_cast<void *>(aux.a_un.a_val), + std::memory_order_relaxed); + break; + } + } + close(fd); + if (vdso_base_.load(std::memory_order_relaxed) == kInvalidBase) { + // Didn't find AT_SYSINFO_EHDR in auxv[]. + vdso_base_.store(nullptr, std::memory_order_relaxed); + } + } + GetCpuFn fn = &GetCPUViaSyscall; // default if VDSO not present. + if (vdso_base_.load(std::memory_order_relaxed)) { + VDSOSupport vdso; + SymbolInfo info; + if (vdso.LookupSymbol("__vdso_getcpu", "LINUX_2.6", STT_FUNC, &info)) { + fn = reinterpret_cast<GetCpuFn>(const_cast<void *>(info.address)); + } + } + // Subtle: this code runs outside of any locks; prevent compiler + // from assigning to getcpu_fn_ more than once. + getcpu_fn_.store(fn, std::memory_order_relaxed); + return vdso_base_.load(std::memory_order_relaxed); +} + +const void *VDSOSupport::SetBase(const void *base) { + ABSL_RAW_CHECK(base != debugging_internal::ElfMemImage::kInvalidBase, + "internal error"); + const void *old_base = vdso_base_.load(std::memory_order_relaxed); + vdso_base_.store(base, std::memory_order_relaxed); + image_.Init(base); + // Also reset getcpu_fn_, so GetCPU could be tested with simulated VDSO. + getcpu_fn_.store(&InitAndGetCPU, std::memory_order_relaxed); + return old_base; +} + +bool VDSOSupport::LookupSymbol(const char *name, + const char *version, + int type, + SymbolInfo *info) const { + return image_.LookupSymbol(name, version, type, info); +} + +bool VDSOSupport::LookupSymbolByAddress(const void *address, + SymbolInfo *info_out) const { + return image_.LookupSymbolByAddress(address, info_out); +} + +// NOLINT on 'long' because this routine mimics kernel api. +long VDSOSupport::GetCPUViaSyscall(unsigned *cpu, // NOLINT(runtime/int) + void *, void *) { +#ifdef SYS_getcpu + return syscall(SYS_getcpu, cpu, nullptr, nullptr); +#else + // x86_64 never implemented sys_getcpu(), except as a VDSO call. + static_cast<void>(cpu); // Avoid an unused argument compiler warning. + errno = ENOSYS; + return -1; +#endif +} + +// Use fast __vdso_getcpu if available. +long VDSOSupport::InitAndGetCPU(unsigned *cpu, // NOLINT(runtime/int) + void *x, void *y) { + Init(); + GetCpuFn fn = getcpu_fn_.load(std::memory_order_relaxed); + ABSL_RAW_CHECK(fn != &InitAndGetCPU, "Init() did not set getcpu_fn_"); + return (*fn)(cpu, x, y); +} + +// This function must be very fast, and may be called from very +// low level (e.g. tcmalloc). Hence I avoid things like +// GoogleOnceInit() and ::operator new. +ABSL_ATTRIBUTE_NO_SANITIZE_MEMORY +int GetCPU() { + unsigned cpu; + int ret_code = (*VDSOSupport::getcpu_fn_)(&cpu, nullptr, nullptr); + return ret_code == 0 ? cpu : ret_code; +} + +// We need to make sure VDSOSupport::Init() is called before +// InitGoogle() does any setuid or chroot calls. If VDSOSupport +// is used in any global constructor, this will happen, since +// VDSOSupport's constructor calls Init. But if not, we need to +// ensure it here, with a global constructor of our own. This +// is an allowed exception to the normal rule against non-trivial +// global constructors. +static class VDSOInitHelper { + public: + VDSOInitHelper() { VDSOSupport::Init(); } +} vdso_init_helper; + +} // namespace debugging_internal +} // namespace absl + +#endif // ABSL_HAVE_VDSO_SUPPORT http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/internal/vdso_support.h ---------------------------------------------------------------------- diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/internal/vdso_support.h b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/internal/vdso_support.h new file mode 100644 index 0000000..870a60a --- /dev/null +++ b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/internal/vdso_support.h @@ -0,0 +1,155 @@ +// +// Copyright 2017 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +// + +// Allow dynamic symbol lookup in the kernel VDSO page. +// +// VDSO stands for "Virtual Dynamic Shared Object" -- a page of +// executable code, which looks like a shared library, but doesn't +// necessarily exist anywhere on disk, and which gets mmap()ed into +// every process by kernels which support VDSO, such as 2.6.x for 32-bit +// executables, and 2.6.24 and above for 64-bit executables. +// +// More details could be found here: +// http://www.trilithium.com/johan/2005/08/linux-gate/ +// +// VDSOSupport -- a class representing kernel VDSO (if present). +// +// Example usage: +// VDSOSupport vdso; +// VDSOSupport::SymbolInfo info; +// typedef (*FN)(unsigned *, void *, void *); +// FN fn = nullptr; +// if (vdso.LookupSymbol("__vdso_getcpu", "LINUX_2.6", STT_FUNC, &info)) { +// fn = reinterpret_cast<FN>(info.address); +// } + +#ifndef ABSL_DEBUGGING_INTERNAL_VDSO_SUPPORT_H_ +#define ABSL_DEBUGGING_INTERNAL_VDSO_SUPPORT_H_ + +#include <atomic> + +#include "absl/debugging/internal/elf_mem_image.h" + +#ifdef ABSL_HAVE_ELF_MEM_IMAGE + +#ifdef ABSL_HAVE_VDSO_SUPPORT +#error ABSL_HAVE_VDSO_SUPPORT cannot be directly set +#else +#define ABSL_HAVE_VDSO_SUPPORT 1 +#endif + +namespace absl { +namespace debugging_internal { + +// NOTE: this class may be used from within tcmalloc, and can not +// use any memory allocation routines. +class VDSOSupport { + public: + VDSOSupport(); + + typedef ElfMemImage::SymbolInfo SymbolInfo; + typedef ElfMemImage::SymbolIterator SymbolIterator; + + // On PowerPC64 VDSO symbols can either be of type STT_FUNC or STT_NOTYPE + // depending on how the kernel is built. The kernel is normally built with + // STT_NOTYPE type VDSO symbols. Let's make things simpler first by using a + // compile-time constant. +#ifdef __powerpc64__ + enum { kVDSOSymbolType = STT_NOTYPE }; +#else + enum { kVDSOSymbolType = STT_FUNC }; +#endif + + // Answers whether we have a vdso at all. + bool IsPresent() const { return image_.IsPresent(); } + + // Allow to iterate over all VDSO symbols. + SymbolIterator begin() const { return image_.begin(); } + SymbolIterator end() const { return image_.end(); } + + // Look up versioned dynamic symbol in the kernel VDSO. + // Returns false if VDSO is not present, or doesn't contain given + // symbol/version/type combination. + // If info_out != nullptr, additional details are filled in. + bool LookupSymbol(const char *name, const char *version, + int symbol_type, SymbolInfo *info_out) const; + + // Find info about symbol (if any) which overlaps given address. + // Returns true if symbol was found; false if VDSO isn't present + // or doesn't have a symbol overlapping given address. + // If info_out != nullptr, additional details are filled in. + bool LookupSymbolByAddress(const void *address, SymbolInfo *info_out) const; + + // Used only for testing. Replace real VDSO base with a mock. + // Returns previous value of vdso_base_. After you are done testing, + // you are expected to call SetBase() with previous value, in order to + // reset state to the way it was. + const void *SetBase(const void *s); + + // Computes vdso_base_ and returns it. Should be called as early as + // possible; before any thread creation, chroot or setuid. + static const void *Init(); + + private: + // image_ represents VDSO ELF image in memory. + // image_.ehdr_ == nullptr implies there is no VDSO. + ElfMemImage image_; + + // Cached value of auxv AT_SYSINFO_EHDR, computed once. + // This is a tri-state: + // kInvalidBase => value hasn't been determined yet. + // 0 => there is no VDSO. + // else => vma of VDSO Elf{32,64}_Ehdr. + // + // When testing with mock VDSO, low bit is set. + // The low bit is always available because vdso_base_ is + // page-aligned. + static std::atomic<const void *> vdso_base_; + + // NOLINT on 'long' because these routines mimic kernel api. + // The 'cache' parameter may be used by some versions of the kernel, + // and should be nullptr or point to a static buffer containing at + // least two 'long's. + static long InitAndGetCPU(unsigned *cpu, void *cache, // NOLINT 'long'. + void *unused); + static long GetCPUViaSyscall(unsigned *cpu, void *cache, // NOLINT 'long'. + void *unused); + typedef long (*GetCpuFn)(unsigned *cpu, void *cache, // NOLINT 'long'. + void *unused); + + // This function pointer may point to InitAndGetCPU, + // GetCPUViaSyscall, or __vdso_getcpu at different stages of initialization. + static std::atomic<GetCpuFn> getcpu_fn_; + + friend int GetCPU(void); // Needs access to getcpu_fn_. + + VDSOSupport(const VDSOSupport&) = delete; + VDSOSupport& operator=(const VDSOSupport&) = delete; +}; + +// Same as sched_getcpu() on later glibc versions. +// Return current CPU, using (fast) __vdso_getcpu@LINUX_2.6 if present, +// otherwise use syscall(SYS_getcpu,...). +// May return -1 with errno == ENOSYS if the kernel doesn't +// support SYS_getcpu. +int GetCPU(); + +} // namespace debugging_internal +} // namespace absl + +#endif // ABSL_HAVE_ELF_MEM_IMAGE + +#endif // ABSL_DEBUGGING_INTERNAL_VDSO_SUPPORT_H_ http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check.cc ---------------------------------------------------------------------- diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check.cc b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check.cc new file mode 100644 index 0000000..e01e5f8 --- /dev/null +++ b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check.cc @@ -0,0 +1,48 @@ +// Copyright 2017 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +// Wrappers around lsan_interface functions. +// When lsan is not linked in, these functions are not available, +// therefore Abseil code which depends on these functions is conditioned on the +// definition of LEAK_SANITIZER. +#include "absl/debugging/leak_check.h" + +#ifndef LEAK_SANITIZER + +namespace absl { +bool HaveLeakSanitizer() { return false; } +void DoIgnoreLeak(const void*) { } +void RegisterLivePointers(const void*, size_t) { } +void UnRegisterLivePointers(const void*, size_t) { } +LeakCheckDisabler::LeakCheckDisabler() { } +LeakCheckDisabler::~LeakCheckDisabler() { } +} // namespace absl + +#else + +#include <sanitizer/lsan_interface.h> + +namespace absl { +bool HaveLeakSanitizer() { return true; } +void DoIgnoreLeak(const void* ptr) { __lsan_ignore_object(ptr); } +void RegisterLivePointers(const void* ptr, size_t size) { + __lsan_register_root_region(ptr, size); +} +void UnRegisterLivePointers(const void* ptr, size_t size) { + __lsan_unregister_root_region(ptr, size); +} +LeakCheckDisabler::LeakCheckDisabler() { __lsan_disable(); } +LeakCheckDisabler::~LeakCheckDisabler() { __lsan_enable(); } +} // namespace absl + +#endif // LEAK_SANITIZER http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check.h ---------------------------------------------------------------------- diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check.h b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check.h new file mode 100644 index 0000000..f67fe88 --- /dev/null +++ b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check.h @@ -0,0 +1,111 @@ +// +// Copyright 2017 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +// + +// ----------------------------------------------------------------------------- +// File: leak_check.h +// ----------------------------------------------------------------------------- +// +// This package contains functions that affect leak checking behavior within +// targets built with the LeakSanitizer (LSan), a memory leak detector that is +// integrated within the AddressSanitizer (ASan) as an additional component, or +// which can be used standalone. LSan and ASan are included or can be provided +// as additional components for most compilers such as Clang, gcc and MSVC. +// Note: this leak checking API is not yet supported in MSVC. +// Leak checking is enabled by default in all ASan builds. +// +// See https://github.com/google/sanitizers/wiki/AddressSanitizerLeakSanitizer +// +// ----------------------------------------------------------------------------- +#ifndef ABSL_DEBUGGING_LEAK_CHECK_H_ +#define ABSL_DEBUGGING_LEAK_CHECK_H_ + +#include <cstddef> + +namespace absl { + +// HaveLeakSanitizer() +// +// Returns true if a leak-checking sanitizer (either ASan or standalone LSan) is +// currently built into this target. +bool HaveLeakSanitizer(); + +// DoIgnoreLeak() +// +// Implements `IgnoreLeak()` below. This function should usually +// not be called directly; calling `IgnoreLeak()` is preferred. +void DoIgnoreLeak(const void* ptr); + +// IgnoreLeak() +// +// Instruct the leak sanitizer to ignore leak warnings on the object referenced +// by the passed pointer, as well as all heap objects transitively referenced +// by it. The passed object pointer can point to either the beginning of the +// object or anywhere within it. +// +// Example: +// +// static T* obj = IgnoreLeak(new T(...)); +// +// If the passed `ptr` does not point to an actively allocated object at the +// time `IgnoreLeak()` is called, the call is a no-op; if it is actively +// allocated, the object must not get deallocated later. +// +template <typename T> +T* IgnoreLeak(T* ptr) { + DoIgnoreLeak(ptr); + return ptr; +} + +// LeakCheckDisabler +// +// This helper class indicates that any heap allocations done in the code block +// covered by the scoped object, which should be allocated on the stack, will +// not be reported as leaks. Leak check disabling will occur within the code +// block and any nested function calls within the code block. +// +// Example: +// +// void Foo() { +// LeakCheckDisabler disabler; +// ... code that allocates objects whose leaks should be ignored ... +// } +// +// REQUIRES: Destructor runs in same thread as constructor +class LeakCheckDisabler { + public: + LeakCheckDisabler(); + LeakCheckDisabler(const LeakCheckDisabler&) = delete; + LeakCheckDisabler& operator=(const LeakCheckDisabler&) = delete; + ~LeakCheckDisabler(); +}; + +// RegisterLivePointers() +// +// Registers `ptr[0,size-1]` as pointers to memory that is still actively being +// referenced and for which leak checking should be ignored. This function is +// useful if you store pointers in mapped memory, for memory ranges that we know +// are correct but for which normal analysis would flag as leaked code. +void RegisterLivePointers(const void* ptr, size_t size); + +// UnRegisterLivePointers() +// +// Deregisters the pointers previously marked as active in +// `RegisterLivePointers()`, enabling leak checking of those pointers. +void UnRegisterLivePointers(const void* ptr, size_t size); + +} // namespace absl + +#endif // ABSL_DEBUGGING_LEAK_CHECK_H_ http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check_disable.cc ---------------------------------------------------------------------- diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check_disable.cc b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check_disable.cc new file mode 100644 index 0000000..df22c1c --- /dev/null +++ b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check_disable.cc @@ -0,0 +1,20 @@ +// Copyright 2017 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Disable LeakSanitizer when this file is linked in. +// This function overrides __lsan_is_turned_off from sanitizer/lsan_interface.h +extern "C" int __lsan_is_turned_off(); +extern "C" int __lsan_is_turned_off() { + return 1; +} http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check_fail_test.cc ---------------------------------------------------------------------- diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check_fail_test.cc b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check_fail_test.cc new file mode 100644 index 0000000..bf541fe --- /dev/null +++ b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check_fail_test.cc @@ -0,0 +1,41 @@ +// Copyright 2017 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include <memory> +#include "gtest/gtest.h" +#include "absl/base/internal/raw_logging.h" +#include "absl/debugging/leak_check.h" + +namespace { + +TEST(LeakCheckTest, LeakMemory) { + // This test is expected to cause lsan failures on program exit. Therefore the + // test will be run only by leak_check_test.sh, which will verify a + // failed exit code. + + char* foo = strdup("lsan should complain about this leaked string"); + ABSL_RAW_LOG(INFO, "Should detect leaked std::string %s", foo); +} + +TEST(LeakCheckTest, LeakMemoryAfterDisablerScope) { + // This test is expected to cause lsan failures on program exit. Therefore the + // test will be run only by external_leak_check_test.sh, which will verify a + // failed exit code. + { absl::LeakCheckDisabler disabler; } + char* foo = strdup("lsan should also complain about this leaked string"); + ABSL_RAW_LOG(INFO, "Re-enabled leak detection.Should detect leaked std::string %s", + foo); +} + +} // namespace http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check_test.cc ---------------------------------------------------------------------- diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check_test.cc b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check_test.cc new file mode 100644 index 0000000..febd1ee --- /dev/null +++ b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/leak_check_test.cc @@ -0,0 +1,42 @@ +// Copyright 2017 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include <string> + +#include "gtest/gtest.h" +#include "absl/base/internal/raw_logging.h" +#include "absl/debugging/leak_check.h" + +namespace { + +TEST(LeakCheckTest, DetectLeakSanitizer) { +#ifdef ABSL_EXPECT_LEAK_SANITIZER + EXPECT_TRUE(absl::HaveLeakSanitizer()); +#else + EXPECT_FALSE(absl::HaveLeakSanitizer()); +#endif +} + +TEST(LeakCheckTest, IgnoreLeakSuppressesLeakedMemoryErrors) { + auto foo = absl::IgnoreLeak(new std::string("some ignored leaked string")); + ABSL_RAW_LOG(INFO, "Ignoring leaked std::string %s", foo->c_str()); +} + +TEST(LeakCheckTest, LeakCheckDisablerIgnoresLeak) { + absl::LeakCheckDisabler disabler; + auto foo = new std::string("some std::string leaked while checks are disabled"); + ABSL_RAW_LOG(INFO, "Ignoring leaked std::string %s", foo->c_str()); +} + +} // namespace http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/stacktrace.cc ---------------------------------------------------------------------- diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/stacktrace.cc b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/stacktrace.cc new file mode 100644 index 0000000..61fee61 --- /dev/null +++ b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/stacktrace.cc @@ -0,0 +1,133 @@ +// Copyright 2017 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Produce stack trace. +// +// There are three different ways we can try to get the stack trace: +// +// 1) Our hand-coded stack-unwinder. This depends on a certain stack +// layout, which is used by gcc (and those systems using a +// gcc-compatible ABI) on x86 systems, at least since gcc 2.95. +// It uses the frame pointer to do its work. +// +// 2) The libunwind library. This is still in development, and as a +// separate library adds a new dependency, but doesn't need a frame +// pointer. It also doesn't call malloc. +// +// 3) The gdb unwinder -- also the one used by the c++ exception code. +// It's obviously well-tested, but has a fatal flaw: it can call +// malloc() from the unwinder. This is a problem because we're +// trying to use the unwinder to instrument malloc(). +// +// Note: if you add a new implementation here, make sure it works +// correctly when absl::GetStackTrace() is called with max_depth == 0. +// Some code may do that. + +#include "absl/debugging/stacktrace.h" + +#include <atomic> + +#include "absl/base/attributes.h" +#include "absl/base/port.h" +#include "absl/debugging/internal/stacktrace_config.h" + +#if defined(ABSL_STACKTRACE_INL_HEADER) +#include ABSL_STACKTRACE_INL_HEADER +#else +# error Cannot calculate stack trace: will need to write for your environment +# include "absl/debugging/internal/stacktrace_aarch64-inl.inc" +# include "absl/debugging/internal/stacktrace_arm-inl.inc" +# include "absl/debugging/internal/stacktrace_generic-inl.inc" +# include "absl/debugging/internal/stacktrace_powerpc-inl.inc" +# include "absl/debugging/internal/stacktrace_unimplemented-inl.inc" +# include "absl/debugging/internal/stacktrace_win32-inl.inc" +# include "absl/debugging/internal/stacktrace_x86-inl.inc" +#endif + +namespace absl { +namespace { + +typedef int (*Unwinder)(void**, int*, int, int, const void*, int*); +std::atomic<Unwinder> custom; + +template <bool IS_STACK_FRAMES, bool IS_WITH_CONTEXT> +ABSL_ATTRIBUTE_ALWAYS_INLINE inline int Unwind(void** result, int* sizes, + int max_depth, int skip_count, + const void* uc, + int* min_dropped_frames) { + Unwinder f = &UnwindImpl<IS_STACK_FRAMES, IS_WITH_CONTEXT>; + Unwinder g = custom.load(std::memory_order_acquire); + if (g != nullptr) f = g; + + // Add 1 to skip count for the unwinder function itself + int size = (*f)(result, sizes, max_depth, skip_count + 1, uc, + min_dropped_frames); + // To disable tail call to (*f)(...) + ABSL_BLOCK_TAIL_CALL_OPTIMIZATION(); + return size; +} + +} // anonymous namespace + +int GetStackFrames(void** result, int* sizes, int max_depth, int skip_count) { + return Unwind<true, false>(result, sizes, max_depth, skip_count, nullptr, + nullptr); +} + +int GetStackFramesWithContext(void** result, int* sizes, int max_depth, + int skip_count, const void* uc, + int* min_dropped_frames) { + return Unwind<true, true>(result, sizes, max_depth, skip_count, uc, + min_dropped_frames); +} + +int GetStackTrace(void** result, int max_depth, int skip_count) { + return Unwind<false, false>(result, nullptr, max_depth, skip_count, nullptr, + nullptr); +} + +int GetStackTraceWithContext(void** result, int max_depth, int skip_count, + const void* uc, int* min_dropped_frames) { + return Unwind<false, true>(result, nullptr, max_depth, skip_count, uc, + min_dropped_frames); +} + +void SetStackUnwinder(Unwinder w) { + custom.store(w, std::memory_order_release); +} + +int DefaultStackUnwinder(void** pcs, int* sizes, int depth, int skip, + const void* uc, int* min_dropped_frames) { + skip++; // For this function + Unwinder f = nullptr; + if (sizes == nullptr) { + if (uc == nullptr) { + f = &UnwindImpl<false, false>; + } else { + f = &UnwindImpl<false, true>; + } + } else { + if (uc == nullptr) { + f = &UnwindImpl<true, false>; + } else { + f = &UnwindImpl<true, true>; + } + } + volatile int x = 0; + int n = (*f)(pcs, sizes, depth, skip, uc, min_dropped_frames); + x = 1; (void) x; // To disable tail call to (*f)(...) + return n; +} + +} // namespace absl http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/stacktrace.h ---------------------------------------------------------------------- diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/stacktrace.h b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/stacktrace.h new file mode 100644 index 0000000..82da3f1 --- /dev/null +++ b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/stacktrace.h @@ -0,0 +1,167 @@ +// +// Copyright 2017 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +// + +// Routines to extract the current stack trace. These functions are +// thread-safe and async-signal-safe. +// Note that stack trace functionality is platform dependent and requires +// additional support from the compiler/build system in many cases. (That is, +// this generally only works on platforms/builds that have been specifically +// configured to support it.) + +#ifndef ABSL_DEBUGGING_STACKTRACE_H_ +#define ABSL_DEBUGGING_STACKTRACE_H_ + +namespace absl { + +// Skips the most recent "skip_count" stack frames (also skips the +// frame generated for the "absl::GetStackFrames" routine itself), and then +// records the pc values for up to the next "max_depth" frames in +// "result", and the corresponding stack frame sizes in "sizes". +// Returns the number of values recorded in "result"/"sizes". +// +// Example: +// main() { foo(); } +// foo() { bar(); } +// bar() { +// void* result[10]; +// int sizes[10]; +// int depth = absl::GetStackFrames(result, sizes, 10, 1); +// } +// +// The absl::GetStackFrames call will skip the frame for "bar". It will +// return 2 and will produce pc values that map to the following +// procedures: +// result[0] foo +// result[1] main +// (Actually, there may be a few more entries after "main" to account for +// startup procedures.) +// And corresponding stack frame sizes will also be recorded: +// sizes[0] 16 +// sizes[1] 16 +// (Stack frame sizes of 16 above are just for illustration purposes.) +// Stack frame sizes of 0 or less indicate that those frame sizes couldn't +// be identified. +// +// This routine may return fewer stack frame entries than are +// available. Also note that "result" and "sizes" must both be non-null. +extern int GetStackFrames(void** result, int* sizes, int max_depth, + int skip_count); + +// Same as above, but to be used from a signal handler. The "uc" parameter +// should be the pointer to ucontext_t which was passed as the 3rd parameter +// to sa_sigaction signal handler. It may help the unwinder to get a +// better stack trace under certain conditions. The "uc" may safely be null. +// +// If min_dropped_frames is not null, stores in *min_dropped_frames a +// lower bound on the number of dropped stack frames. The stored value is +// guaranteed to be >= 0. The number of real stack frames is guaranteed to +// be >= skip_count + max_depth + *min_dropped_frames. +extern int GetStackFramesWithContext(void** result, int* sizes, int max_depth, + int skip_count, const void* uc, + int* min_dropped_frames); + +// This is similar to the absl::GetStackFrames routine, except that it returns +// the stack trace only, and not the stack frame sizes as well. +// Example: +// main() { foo(); } +// foo() { bar(); } +// bar() { +// void* result[10]; +// int depth = absl::GetStackTrace(result, 10, 1); +// } +// +// This produces: +// result[0] foo +// result[1] main +// .... ... +// +// "result" must not be null. +extern int GetStackTrace(void** result, int max_depth, int skip_count); + +// Same as above, but to be used from a signal handler. The "uc" parameter +// should be the pointer to ucontext_t which was passed as the 3rd parameter +// to sa_sigaction signal handler. It may help the unwinder to get a +// better stack trace under certain conditions. The "uc" may safely be null. +// +// If min_dropped_frames is not null, stores in *min_dropped_frames a +// lower bound on the number of dropped stack frames. The stored value is +// guaranteed to be >= 0. The number of real stack frames is guaranteed to +// be >= skip_count + max_depth + *min_dropped_frames. +extern int GetStackTraceWithContext(void** result, int max_depth, + int skip_count, const void* uc, + int* min_dropped_frames); + +// Call this to provide a custom function for unwinding stack frames +// that will be used every time someone invokes one of the static +// GetStack{Frames,Trace}{,WithContext}() functions above. +// +// The arguments passed to the unwinder function will match the +// arguments passed to absl::GetStackFramesWithContext() except that sizes +// will be non-null iff the caller is interested in frame sizes. +// +// If unwinder is null, we revert to the default stack-tracing behavior. +// +// **************************************************************** +// WARNINGS +// +// absl::SetStackUnwinder is not suitable for general purpose use. It is +// provided for custom runtimes. +// Some things to watch out for when calling absl::SetStackUnwinder: +// +// (a) The unwinder may be called from within signal handlers and +// therefore must be async-signal-safe. +// +// (b) Even after a custom stack unwinder has been unregistered, other +// threads may still be in the process of using that unwinder. +// Therefore do not clean up any state that may be needed by an old +// unwinder. +// **************************************************************** +extern void SetStackUnwinder(int (*unwinder)(void** pcs, int* sizes, + int max_depth, int skip_count, + const void* uc, + int* min_dropped_frames)); + +// Function that exposes built-in stack-unwinding behavior, ignoring +// any calls to absl::SetStackUnwinder(). +// +// pcs must NOT be null. +// +// sizes may be null. +// uc may be null. +// min_dropped_frames may be null. +// +// The semantics are the same as the corresponding GetStack*() function in the +// case where absl::SetStackUnwinder() was never called. Equivalents are: +// +// null sizes | non-nullptr sizes +// |==========================================================| +// null uc | GetStackTrace() | GetStackFrames() | +// non-null uc | GetStackTraceWithContext() | GetStackFramesWithContext() | +// |==========================================================| +extern int DefaultStackUnwinder(void** pcs, int* sizes, int max_depth, + int skip_count, const void* uc, + int* min_dropped_frames); + +namespace debugging_internal { +// Returns true for platforms which are expected to have functioning stack trace +// implementations. Intended to be used for tests which want to exclude +// verification of logic known to be broken because stack traces are not +// working. +extern bool StackTraceWorksForTest(); +} // namespace debugging_internal +} // namespace absl + +#endif // ABSL_DEBUGGING_STACKTRACE_H_ http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/symbolize.cc ---------------------------------------------------------------------- diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/symbolize.cc b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/symbolize.cc new file mode 100644 index 0000000..a35e24c --- /dev/null +++ b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/symbolize.cc @@ -0,0 +1,28 @@ +// Copyright 2018 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include "absl/debugging/symbolize.h" + +#if defined(ABSL_INTERNAL_HAVE_ELF_SYMBOLIZE) +#include "absl/debugging/symbolize_elf.inc" +#elif defined(_WIN32) && defined(_DEBUG) +// The Windows Symbolizer only works in debug mode. Note that _DEBUG +// is the macro that defines whether or not MS C-Runtime debug info is +// available. Note that the PDB files containing the debug info must +// also be available to the program at runtime for the symbolizer to +// work. +#include "absl/debugging/symbolize_win32.inc" +#else +#include "absl/debugging/symbolize_unimplemented.inc" +#endif http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/symbolize.h ---------------------------------------------------------------------- diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/symbolize.h b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/symbolize.h new file mode 100644 index 0000000..073a447 --- /dev/null +++ b/libraries/ostrich/backend/3rdparty/abseil/absl/debugging/symbolize.h @@ -0,0 +1,35 @@ +// Copyright 2018 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#ifndef ABSL_DEBUGGING_SYMBOLIZE_H_ +#define ABSL_DEBUGGING_SYMBOLIZE_H_ + +#include "absl/debugging/internal/symbolize.h" + +namespace absl { + +// Initializes this module. Symbolize() may fail prior calling this function. +// `argv0` is the path to this program, which is usually obtained in main() +// though argv[0]. +void InitializeSymbolizer(const char* argv0); + +// Symbolizes a program counter. On success, returns true and write the +// symbol name to "out". The symbol name is demangled if possible +// (supports symbols generated by GCC 3.x or newer), may be truncated, and +// will be '\0' terminated. Otherwise, returns false. +bool Symbolize(const void *pc, char *out, int out_size); + +} // namespace absl + +#endif // ABSL_DEBUGGING_SYMBOLIZE_H_
