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Update vendored deps

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This commit is contained in:
Luke Street
2022-08-29 13:59:48 -04:00
parent 73f3dde770
commit 7a950b49eb
723 changed files with 86515 additions and 54105 deletions
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120
third_party/abseil-cpp/absl/debugging/BUILD.bazel vendored
View File

@@ -14,7 +14,6 @@
# limitations under the License.
#
load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
load(
"//absl:copts/configure_copts.bzl",
"ABSL_DEFAULT_COPTS",
@@ -122,7 +121,7 @@ cc_library(
],
copts = ABSL_DEFAULT_COPTS,
linkopts = ABSL_DEFAULT_LINKOPTS,
visibility = ["//visibility:private"],
visibility = ["//absl/log/internal:__pkg__"],
deps = [
":stacktrace",
":symbolize",
@@ -144,7 +143,6 @@ cc_library(
"//absl/base",
"//absl/base:config",
"//absl/base:core_headers",
"//absl/base:errno_saver",
"//absl/base:raw_logging_internal",
],
)
@@ -183,6 +181,7 @@ cc_library(
],
copts = ABSL_DEFAULT_COPTS,
linkopts = ABSL_DEFAULT_LINKOPTS,
visibility = ["//visibility:private"],
deps = [
"//absl/base:config",
"//absl/base:core_headers",
@@ -197,6 +196,8 @@ cc_library(
srcs = ["internal/demangle.cc"],
hdrs = ["internal/demangle.h"],
copts = ABSL_DEFAULT_COPTS,
linkopts = ABSL_DEFAULT_LINKOPTS,
visibility = ["//visibility:private"],
deps = [
"//absl/base",
"//absl/base:config",
@@ -224,6 +225,7 @@ cc_library(
name = "leak_check",
srcs = ["leak_check.cc"],
hdrs = ["leak_check.h"],
copts = ABSL_DEFAULT_COPTS,
linkopts = ABSL_DEFAULT_LINKOPTS,
deps = [
"//absl/base:config",
@@ -231,98 +233,33 @@ cc_library(
],
)
# Adding a dependency to leak_check_disable will disable
# sanitizer leak checking (asan/lsan) in a test without
# the need to mess around with build features.
cc_library(
name = "leak_check_disable",
srcs = ["leak_check_disable.cc"],
linkopts = ABSL_DEFAULT_LINKOPTS,
linkstatic = 1,
deps = ["//absl/base:config"],
alwayslink = 1,
)
# These targets exists for use in tests only, explicitly configuring the
# LEAK_SANITIZER macro. It must be linked with -fsanitize=leak for lsan.
ABSL_LSAN_LINKOPTS = select({
"//absl:clang_compiler": ["-fsanitize=leak"],
"//conditions:default": [],
})
cc_library(
name = "leak_check_api_enabled_for_testing",
testonly = 1,
srcs = ["leak_check.cc"],
hdrs = ["leak_check.h"],
copts = select({
"//absl:clang_compiler": ["-DLEAK_SANITIZER"],
"//conditions:default": [],
}),
linkopts = ABSL_DEFAULT_LINKOPTS,
visibility = ["//visibility:private"],
deps = [
"//absl/base:config",
"//absl/base:core_headers",
],
)
cc_library(
name = "leak_check_api_disabled_for_testing",
testonly = 1,
srcs = ["leak_check.cc"],
hdrs = ["leak_check.h"],
copts = ["-ULEAK_SANITIZER"],
linkopts = ABSL_DEFAULT_LINKOPTS,
visibility = ["//visibility:private"],
deps = [
"//absl/base:config",
"//absl/base:core_headers",
],
)
cc_test(
name = "leak_check_test",
srcs = ["leak_check_test.cc"],
copts = select({
"//absl:clang_compiler": ["-DABSL_EXPECT_LEAK_SANITIZER"],
"//conditions:default": [],
}),
linkopts = ABSL_LSAN_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
tags = ["notsan"],
deps = [
":leak_check_api_enabled_for_testing",
"//absl/base",
"@com_google_googletest//:gtest_main",
],
)
cc_test(
name = "leak_check_no_lsan_test",
srcs = ["leak_check_test.cc"],
copts = ["-UABSL_EXPECT_LEAK_SANITIZER"],
copts = ABSL_TEST_COPTS,
linkopts = ABSL_DEFAULT_LINKOPTS,
tags = ["noasan"],
tags = ["notsan"],
deps = [
":leak_check_api_disabled_for_testing",
"//absl/base", # for raw_logging
":leak_check",
"//absl/base:config",
"//absl/base:raw_logging_internal",
"@com_google_googletest//:gtest_main",
],
)
# Test that leak checking is skipped when lsan is enabled but
# ":leak_check_disable" is linked in.
#
# This test should fail in the absence of a dependency on ":leak_check_disable"
cc_test(
name = "disabled_leak_check_test",
# Binary that leaks memory and expects to fail on exit. This isn't a
# test that expected to pass on its own; it exists to be called by a
# script that checks exit status and output.
# TODO(absl-team): Write a test to run this with a script that
# verifies that it correctly fails.
cc_binary(
name = "leak_check_fail_test_binary",
srcs = ["leak_check_fail_test.cc"],
linkopts = ABSL_LSAN_LINKOPTS + ABSL_DEFAULT_LINKOPTS,
tags = ["notsan"],
copts = ABSL_TEST_COPTS,
linkopts = ABSL_DEFAULT_LINKOPTS,
deps = [
":leak_check_api_enabled_for_testing",
":leak_check_disable",
"//absl/base",
":leak_check",
"//absl/base:raw_logging_internal",
"@com_google_googletest//:gtest_main",
],
)
@@ -355,3 +292,18 @@ cc_test(
"@com_google_googletest//:gtest_main",
],
)
cc_binary(
name = "stacktrace_benchmark",
testonly = 1,
srcs = ["stacktrace_benchmark.cc"],
copts = ABSL_TEST_COPTS,
linkopts = ABSL_DEFAULT_LINKOPTS,
tags = ["benchmark"],
deps = [
":stacktrace",
"//absl/base:config",
"//absl/base:core_headers",
"@com_github_google_benchmark//:benchmark_main",
],
)

37
third_party/abseil-cpp/absl/debugging/BUILD.gn vendored
View File

@@ -61,7 +61,10 @@ absl_source_set("symbolize") {
absl_source_set("examine_stack") {
sources = [ "internal/examine_stack.cc" ]
public = [ "internal/examine_stack.h" ]
visibility = [ ":*" ]
visibility = [
":*",
"//third_party/abseil-cpp/absl/log/internal:*",
]
deps = [
":stacktrace",
":symbolize",
@@ -80,7 +83,6 @@ absl_source_set("failure_signal_handler") {
"//third_party/abseil-cpp/absl/base",
"//third_party/abseil-cpp/absl/base:config",
"//third_party/abseil-cpp/absl/base:core_headers",
"//third_party/abseil-cpp/absl/base:errno_saver",
"//third_party/abseil-cpp/absl/base:raw_logging_internal",
]
}
@@ -96,6 +98,7 @@ absl_source_set("debugging_internal") {
"internal/elf_mem_image.h",
"internal/vdso_support.h",
]
visibility = [ ":*" ]
deps = [
"//third_party/abseil-cpp/absl/base:config",
"//third_party/abseil-cpp/absl/base:core_headers",
@@ -108,6 +111,7 @@ absl_source_set("debugging_internal") {
absl_source_set("demangle_internal") {
sources = [ "internal/demangle.cc" ]
public = [ "internal/demangle.h" ]
visibility = [ ":*" ]
deps = [
"//third_party/abseil-cpp/absl/base",
"//third_party/abseil-cpp/absl/base:config",
@@ -129,35 +133,6 @@ absl_source_set("leak_check") {
]
}
absl_source_set("leak_check_disable") {
sources = [ "leak_check_disable.cc" ]
deps = [ "//third_party/abseil-cpp/absl/base:config" ]
}
if (is_lsan) {
absl_source_set("leak_check_api_enabled_for_testing") {
testonly = true
sources = [ "leak_check.cc" ]
public = [ "leak_check.h" ]
visibility = [ ":*" ]
deps = [
"//third_party/abseil-cpp/absl/base:config",
"//third_party/abseil-cpp/absl/base:core_headers",
]
}
} else {
absl_source_set("leak_check_api_disabled_for_testing") {
testonly = true
sources = [ "leak_check.cc" ]
public = [ "leak_check.h" ]
visibility = [ ":*" ]
deps = [
"//third_party/abseil-cpp/absl/base:config",
"//third_party/abseil-cpp/absl/base:core_headers",
]
}
}
absl_source_set("stack_consumption") {
testonly = true
sources = [ "internal/stack_consumption.cc" ]

81
third_party/abseil-cpp/absl/debugging/CMakeLists.txt vendored
View File

@@ -14,6 +14,8 @@
# limitations under the License.
#
find_library(EXECINFO_LIBRARY execinfo)
absl_cc_library(
NAME
stacktrace
@@ -33,6 +35,8 @@ absl_cc_library(
"stacktrace.cc"
COPTS
${ABSL_DEFAULT_COPTS}
LINKOPTS
$<$<BOOL:${EXECINFO_LIBRARY}>:${EXECINFO_LIBRARY}>
DEPS
absl::debugging_internal
absl::config
@@ -93,6 +97,7 @@ absl_cc_test(
GTest::gmock
)
# Internal-only target, do not depend on directly.
absl_cc_library(
NAME
examine_stack
@@ -125,7 +130,6 @@ absl_cc_library(
absl::base
absl::config
absl::core_headers
absl::errno_saver
absl::raw_logging_internal
PUBLIC
)
@@ -147,6 +151,7 @@ absl_cc_test(
GTest::gmock
)
# Internal-only target, do not depend on directly.
absl_cc_library(
NAME
debugging_internal
@@ -168,6 +173,7 @@ absl_cc_library(
absl::raw_logging_internal
)
# Internal-only target, do not depend on directly.
absl_cc_library(
NAME
demangle_internal
@@ -215,42 +221,6 @@ absl_cc_library(
PUBLIC
)
absl_cc_library(
NAME
leak_check_disable
SRCS
"leak_check_disable.cc"
COPTS
${ABSL_DEFAULT_COPTS}
PUBLIC
)
absl_cc_library(
NAME
leak_check_api_enabled_for_testing
HDRS
"leak_check.h"
SRCS
"leak_check.cc"
COPTS
${ABSL_DEFAULT_COPTS}
$<$<BOOL:${ABSL_HAVE_LSAN}>:-DLEAK_SANITIZER>
TESTONLY
)
absl_cc_library(
NAME
leak_check_api_disabled_for_testing
HDRS
"leak_check.h"
SRCS
"leak_check.cc"
COPTS
${ABSL_DEFAULT_COPTS}
"-ULEAK_SANITIZER"
TESTONLY
)
absl_cc_test(
NAME
leak_check_test
@@ -258,46 +228,15 @@ absl_cc_test(
"leak_check_test.cc"
COPTS
${ABSL_TEST_COPTS}
"$<$<BOOL:${ABSL_HAVE_LSAN}>:-DABSL_EXPECT_LEAK_SANITIZER>"
LINKOPTS
"${ABSL_LSAN_LINKOPTS}"
${ABSL_DEFAULT_LINKOPTS}
DEPS
absl::leak_check_api_enabled_for_testing
absl::leak_check
absl::base
GTest::gmock_main
)
absl_cc_test(
NAME
leak_check_no_lsan_test
SRCS
"leak_check_test.cc"
COPTS
${ABSL_TEST_COPTS}
"-UABSL_EXPECT_LEAK_SANITIZER"
DEPS
absl::leak_check_api_disabled_for_testing
absl::base
GTest::gmock_main
)
absl_cc_test(
NAME
disabled_leak_check_test
SRCS
"leak_check_fail_test.cc"
COPTS
${ABSL_TEST_COPTS}
LINKOPTS
"${ABSL_LSAN_LINKOPTS}"
DEPS
absl::leak_check_api_enabled_for_testing
absl::leak_check_disable
absl::base
absl::raw_logging_internal
GTest::gmock_main
)
# Internal-only target, do not depend on directly.
absl_cc_library(
NAME
stack_consumption

6
third_party/abseil-cpp/absl/debugging/failure_signal_handler.cc vendored
View File

@@ -42,7 +42,6 @@
#include <ctime>
#include "absl/base/attributes.h"
#include "absl/base/internal/errno_saver.h"
#include "absl/base/internal/raw_logging.h"
#include "absl/base/internal/sysinfo.h"
#include "absl/debugging/internal/examine_stack.h"
@@ -52,7 +51,7 @@
#define ABSL_HAVE_SIGACTION
// Apple WatchOS and TVOS don't allow sigaltstack
#if !(defined(TARGET_OS_WATCH) && TARGET_OS_WATCH) && \
!(defined(TARGET_OS_TV) && TARGET_OS_TV)
!(defined(TARGET_OS_TV) && TARGET_OS_TV) && !defined(__QNX__)
#define ABSL_HAVE_SIGALTSTACK
#endif
#endif
@@ -217,8 +216,7 @@ static void InstallOneFailureHandler(FailureSignalData* data,
#endif
static void WriteToStderr(const char* data) {
absl::base_internal::ErrnoSaver errno_saver;
absl::raw_logging_internal::SafeWriteToStderr(data, strlen(data));
absl::raw_logging_internal::AsyncSignalSafeWriteToStderr(data, strlen(data));
}
static void WriteSignalMessage(int signo, int cpu,

135
third_party/abseil-cpp/absl/debugging/internal/address_is_readable.cc vendored
View File

@@ -30,16 +30,12 @@ bool AddressIsReadable(const void* /* addr */) { return true; }
ABSL_NAMESPACE_END
} // namespace absl
#else
#else // __linux__ && !__ANDROID__
#include <fcntl.h>
#include <sys/syscall.h>
#include <stdint.h>
#include <syscall.h>
#include <unistd.h>
#include <atomic>
#include <cerrno>
#include <cstdint>
#include "absl/base/internal/errno_saver.h"
#include "absl/base/internal/raw_logging.h"
@@ -47,93 +43,54 @@ namespace absl {
ABSL_NAMESPACE_BEGIN
namespace debugging_internal {
// Pack a pid and two file descriptors into a 64-bit word,
// using 16, 24, and 24 bits for each respectively.
static uint64_t Pack(uint64_t pid, uint64_t read_fd, uint64_t write_fd) {
ABSL_RAW_CHECK((read_fd >> 24) == 0 && (write_fd >> 24) == 0,
"fd out of range");
return (pid << 48) | ((read_fd & 0xffffff) << 24) | (write_fd & 0xffffff);
}
// Unpack x into a pid and two file descriptors, where x was created with
// Pack().
static void Unpack(uint64_t x, int *pid, int *read_fd, int *write_fd) {
*pid = x >> 48;
*read_fd = (x >> 24) & 0xffffff;
*write_fd = x & 0xffffff;
}
// Return whether the byte at *addr is readable, without faulting.
// Save and restores errno. Returns true on systems where
// unimplemented.
// This is a namespace-scoped variable for correct zero-initialization.
static std::atomic<uint64_t> pid_and_fds; // initially 0, an invalid pid.
// NOTE: be extra careful about adding any interposable function calls here
// (such as open(), read(), etc.). These symbols may be interposed and will get
// invoked in contexts they don't expect.
//
// NOTE: any new system calls here may also require sandbox reconfiguration.
//
bool AddressIsReadable(const void *addr) {
// Align address on 8-byte boundary. On aarch64, checking last
// byte before inaccessible page returned unexpected EFAULT.
const uintptr_t u_addr = reinterpret_cast<uintptr_t>(addr) & ~7;
addr = reinterpret_cast<const void *>(u_addr);
// rt_sigprocmask below will succeed for this input.
if (addr == nullptr) return false;
absl::base_internal::ErrnoSaver errno_saver;
// We test whether a byte is readable by using write(). Normally, this would
// be done via a cached file descriptor to /dev/null, but linux fails to
// check whether the byte is readable when the destination is /dev/null, so
// we use a cached pipe. We store the pid of the process that created the
// pipe to handle the case where a process forks, and the child closes all
// the file descriptors and then calls this routine. This is not perfect:
// the child could use the routine, then close all file descriptors and then
// use this routine again. But the likely use of this routine is when
// crashing, to test the validity of pages when dumping the stack. Beware
// that we may leak file descriptors, but we're unlikely to leak many.
int bytes_written;
int current_pid = getpid() & 0xffff; // we use only the low order 16 bits
do { // until we do not get EBADF trying to use file descriptors
int pid;
int read_fd;
int write_fd;
uint64_t local_pid_and_fds = pid_and_fds.load(std::memory_order_acquire);
Unpack(local_pid_and_fds, &pid, &read_fd, &write_fd);
while (current_pid != pid) {
int p[2];
// new pipe
if (pipe(p) != 0) {
ABSL_RAW_LOG(FATAL, "Failed to create pipe, errno=%d", errno);
}
fcntl(p[0], F_SETFD, FD_CLOEXEC);
fcntl(p[1], F_SETFD, FD_CLOEXEC);
uint64_t new_pid_and_fds = Pack(current_pid, p[0], p[1]);
if (pid_and_fds.compare_exchange_strong(
local_pid_and_fds, new_pid_and_fds, std::memory_order_release,
std::memory_order_relaxed)) {
local_pid_and_fds = new_pid_and_fds; // fds exposed to other threads
} else { // fds not exposed to other threads; we can close them.
close(p[0]);
close(p[1]);
local_pid_and_fds = pid_and_fds.load(std::memory_order_acquire);
}
Unpack(local_pid_and_fds, &pid, &read_fd, &write_fd);
}
errno = 0;
// Use syscall(SYS_write, ...) instead of write() to prevent ASAN
// and other checkers from complaining about accesses to arbitrary
// memory.
do {
bytes_written = syscall(SYS_write, write_fd, addr, 1);
} while (bytes_written == -1 && errno == EINTR);
if (bytes_written == 1) { // remove the byte from the pipe
char c;
while (read(read_fd, &c, 1) == -1 && errno == EINTR) {
}
}
if (errno == EBADF) { // Descriptors invalid.
// If pid_and_fds contains the problematic file descriptors we just used,
// this call will forget them, and the loop will try again.
pid_and_fds.compare_exchange_strong(local_pid_and_fds, 0,
std::memory_order_release,
std::memory_order_relaxed);
}
} while (errno == EBADF);
return bytes_written == 1;
// Here we probe with some syscall which
// - accepts an 8-byte region of user memory as input
// - tests for EFAULT before other validation
// - has no problematic side-effects
//
// rt_sigprocmask(2) works for this. It copies sizeof(kernel_sigset_t)==8
// bytes from the address into the kernel memory before any validation.
//
// The call can never succeed, since the `how` parameter is not one of
// SIG_BLOCK, SIG_UNBLOCK, SIG_SETMASK.
//
// This strategy depends on Linux implementation details,
// so we rely on the test to alert us if it stops working.
//
// Some discarded past approaches:
// - msync() doesn't reject PROT_NONE regions
// - write() on /dev/null doesn't return EFAULT
// - write() on a pipe requires creating it and draining the writes
// - connect() works but is problematic for sandboxes and needs a valid
// file descriptor
//
// This can never succeed (invalid first argument to sigprocmask).
ABSL_RAW_CHECK(syscall(SYS_rt_sigprocmask, ~0, addr, nullptr,
/*sizeof(kernel_sigset_t)*/ 8) == -1,
"unexpected success");
ABSL_RAW_CHECK(errno == EFAULT || errno == EINVAL, "unexpected errno");
return errno != EFAULT;
}
} // namespace debugging_internal
ABSL_NAMESPACE_END
} // namespace absl
#endif
#endif // __linux__ && !__ANDROID__

27
third_party/abseil-cpp/absl/debugging/internal/elf_mem_image.cc vendored
View File

@@ -22,6 +22,7 @@
#include <string.h>
#include <cassert>
#include <cstddef>
#include "absl/base/config.h"
#include "absl/base/internal/raw_logging.h"
// From binutils/include/elf/common.h (this doesn't appear to be documented
@@ -43,11 +44,11 @@ namespace debugging_internal {
namespace {
#if __WORDSIZE == 32
#if __SIZEOF_POINTER__ == 4
const int kElfClass = ELFCLASS32;
int ElfBind(const ElfW(Sym) *symbol) { return ELF32_ST_BIND(symbol->st_info); }
int ElfType(const ElfW(Sym) *symbol) { return ELF32_ST_TYPE(symbol->st_info); }
#elif __WORDSIZE == 64
#elif __SIZEOF_POINTER__ == 8
const int kElfClass = ELFCLASS64;
int ElfBind(const ElfW(Sym) *symbol) { return ELF64_ST_BIND(symbol->st_info); }
int ElfType(const ElfW(Sym) *symbol) { return ELF64_ST_TYPE(symbol->st_info); }
@@ -175,17 +176,17 @@ void ElfMemImage::Init(const void *base) {
}
switch (base_as_char[EI_DATA]) {
case ELFDATA2LSB: {
if (__LITTLE_ENDIAN != __BYTE_ORDER) {
assert(false);
return;
}
#ifndef ABSL_IS_LITTLE_ENDIAN
assert(false);
return;
#endif
break;
}
case ELFDATA2MSB: {
if (__BIG_ENDIAN != __BYTE_ORDER) {
assert(false);
return;
}
#ifndef ABSL_IS_BIG_ENDIAN
assert(false);
return;
#endif
break;
}
default: {
@@ -221,7 +222,7 @@ void ElfMemImage::Init(const void *base) {
reinterpret_cast<ElfW(Dyn) *>(dynamic_program_header->p_vaddr +
relocation);
for (; dynamic_entry->d_tag != DT_NULL; ++dynamic_entry) {
const ElfW(Xword) value = dynamic_entry->d_un.d_val + relocation;
const auto value = dynamic_entry->d_un.d_val + relocation;
switch (dynamic_entry->d_tag) {
case DT_HASH:
hash_ = reinterpret_cast<ElfW(Word) *>(value);
@@ -350,7 +351,11 @@ void ElfMemImage::SymbolIterator::Update(int increment) {
const ElfW(Versym) *version_symbol = image->GetVersym(index_);
ABSL_RAW_CHECK(symbol && version_symbol, "");
const char *const symbol_name = image->GetDynstr(symbol->st_name);
#if defined(__NetBSD__)
const int version_index = version_symbol->vs_vers & VERSYM_VERSION;
#else
const ElfW(Versym) version_index = version_symbol[0] & VERSYM_VERSION;
#endif
const ElfW(Verdef) *version_definition = nullptr;
const char *version_name = "";
if (symbol->st_shndx == SHN_UNDEF) {

9
third_party/abseil-cpp/absl/debugging/internal/elf_mem_image.h vendored
View File

@@ -31,8 +31,9 @@
#error ABSL_HAVE_ELF_MEM_IMAGE cannot be directly set
#endif
#if defined(__ELF__) && defined(__GLIBC__) && !defined(__native_client__) && \
!defined(__asmjs__) && !defined(__wasm__)
#if defined(__ELF__) && !defined(__OpenBSD__) && !defined(__QNX__) && \
!defined(__native_client__) && !defined(__asmjs__) && \
!defined(__wasm__) && !defined(__HAIKU__)
#define ABSL_HAVE_ELF_MEM_IMAGE 1
#endif
@@ -40,6 +41,10 @@
#include <link.h> // for ElfW
#if defined(__FreeBSD__) && !defined(ElfW)
#define ElfW(x) __ElfN(x)
#endif
namespace absl {
ABSL_NAMESPACE_BEGIN
namespace debugging_internal {

222
third_party/abseil-cpp/absl/debugging/internal/examine_stack.cc vendored
View File

@@ -20,7 +20,13 @@
#include <unistd.h>
#endif
#ifdef __APPLE__
#include "absl/base/config.h"
#ifdef ABSL_HAVE_MMAP
#include <sys/mman.h>
#endif
#if defined(__linux__) || defined(__APPLE__)
#include <sys/ucontext.h>
#endif
@@ -37,10 +43,115 @@ namespace absl {
ABSL_NAMESPACE_BEGIN
namespace debugging_internal {
namespace {
constexpr int kDefaultDumpStackFramesLimit = 64;
// The %p field width for printf() functions is two characters per byte,
// and two extra for the leading "0x".
constexpr int kPrintfPointerFieldWidth = 2 + 2 * sizeof(void*);
ABSL_CONST_INIT SymbolizeUrlEmitter debug_stack_trace_hook = nullptr;
// Async-signal safe mmap allocator.
void* Allocate(size_t num_bytes) {
#ifdef ABSL_HAVE_MMAP
void* p = ::mmap(nullptr, num_bytes, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
return p == MAP_FAILED ? nullptr : p;
#else
(void)num_bytes;
return nullptr;
#endif // ABSL_HAVE_MMAP
}
void Deallocate(void* p, size_t size) {
#ifdef ABSL_HAVE_MMAP
::munmap(p, size);
#else
(void)p;
(void)size;
#endif // ABSL_HAVE_MMAP
}
// Print a program counter only.
void DumpPC(OutputWriter* writer, void* writer_arg, void* const pc,
const char* const prefix) {
char buf[100];
snprintf(buf, sizeof(buf), "%s@ %*p\n", prefix, kPrintfPointerFieldWidth, pc);
writer(buf, writer_arg);
}
// Print a program counter and the corresponding stack frame size.
void DumpPCAndFrameSize(OutputWriter* writer, void* writer_arg, void* const pc,
int framesize, const char* const prefix) {
char buf[100];
if (framesize <= 0) {
snprintf(buf, sizeof(buf), "%s@ %*p (unknown)\n", prefix,
kPrintfPointerFieldWidth, pc);
} else {
snprintf(buf, sizeof(buf), "%s@ %*p %9d\n", prefix,
kPrintfPointerFieldWidth, pc, framesize);
}
writer(buf, writer_arg);
}
// Print a program counter and the corresponding symbol.
void DumpPCAndSymbol(OutputWriter* writer, void* writer_arg, void* const pc,
const char* const prefix) {
char tmp[1024];
const char* symbol = "(unknown)";
// Symbolizes the previous address of pc because pc may be in the
// next function. The overrun happens when the function ends with
// a call to a function annotated noreturn (e.g. CHECK).
// If symbolization of pc-1 fails, also try pc on the off-chance
// that we crashed on the first instruction of a function (that
// actually happens very often for e.g. __restore_rt).
const uintptr_t prev_pc = reinterpret_cast<uintptr_t>(pc) - 1;
if (absl::Symbolize(reinterpret_cast<const char*>(prev_pc), tmp,
sizeof(tmp)) ||
absl::Symbolize(pc, tmp, sizeof(tmp))) {
symbol = tmp;
}
char buf[1024];
snprintf(buf, sizeof(buf), "%s@ %*p %s\n", prefix, kPrintfPointerFieldWidth,
pc, symbol);
writer(buf, writer_arg);
}
// Print a program counter, its stack frame size, and its symbol name.
// Note that there is a separate symbolize_pc argument. Return addresses may be
// at the end of the function, and this allows the caller to back up from pc if
// appropriate.
void DumpPCAndFrameSizeAndSymbol(OutputWriter* writer, void* writer_arg,
void* const pc, void* const symbolize_pc,
int framesize, const char* const prefix) {
char tmp[1024];
const char* symbol = "(unknown)";
if (absl::Symbolize(symbolize_pc, tmp, sizeof(tmp))) {
symbol = tmp;
}
char buf[1024];
if (framesize <= 0) {
snprintf(buf, sizeof(buf), "%s@ %*p (unknown) %s\n", prefix,
kPrintfPointerFieldWidth, pc, symbol);
} else {
snprintf(buf, sizeof(buf), "%s@ %*p %9d %s\n", prefix,
kPrintfPointerFieldWidth, pc, framesize, symbol);
}
writer(buf, writer_arg);
}
} // namespace
void RegisterDebugStackTraceHook(SymbolizeUrlEmitter hook) {
debug_stack_trace_hook = hook;
}
SymbolizeUrlEmitter GetDebugStackTraceHook() { return debug_stack_trace_hook; }
// Returns the program counter from signal context, nullptr if
// unknown. vuc is a ucontext_t*. We use void* to avoid the use of
// ucontext_t on non-POSIX systems.
void* GetProgramCounter(void* vuc) {
void* GetProgramCounter(void* const vuc) {
#ifdef __linux__
if (vuc != nullptr) {
ucontext_t* context = reinterpret_cast<ucontext_t*>(vuc);
@@ -82,6 +193,8 @@ void* GetProgramCounter(void* vuc) {
return reinterpret_cast<void*>(context->uc_mcontext.gregs[16]);
#elif defined(__e2k__)
return reinterpret_cast<void*>(context->uc_mcontext.cr0_hi);
#elif defined(__loongarch__)
return reinterpret_cast<void*>(context->uc_mcontext.__pc);
#else
#error "Undefined Architecture."
#endif
@@ -120,59 +233,17 @@ void* GetProgramCounter(void* vuc) {
return nullptr;
}
// The %p field width for printf() functions is two characters per byte,
// and two extra for the leading "0x".
static constexpr int kPrintfPointerFieldWidth = 2 + 2 * sizeof(void*);
// Print a program counter, its stack frame size, and its symbol name.
// Note that there is a separate symbolize_pc argument. Return addresses may be
// at the end of the function, and this allows the caller to back up from pc if
// appropriate.
static void DumpPCAndFrameSizeAndSymbol(void (*writerfn)(const char*, void*),
void* writerfn_arg, void* pc,
void* symbolize_pc, int framesize,
const char* const prefix) {
char tmp[1024];
const char* symbol = "(unknown)";
if (absl::Symbolize(symbolize_pc, tmp, sizeof(tmp))) {
symbol = tmp;
}
char buf[1024];
if (framesize <= 0) {
snprintf(buf, sizeof(buf), "%s@ %*p (unknown) %s\n", prefix,
kPrintfPointerFieldWidth, pc, symbol);
} else {
snprintf(buf, sizeof(buf), "%s@ %*p %9d %s\n", prefix,
kPrintfPointerFieldWidth, pc, framesize, symbol);
}
writerfn(buf, writerfn_arg);
}
// Print a program counter and the corresponding stack frame size.
static void DumpPCAndFrameSize(void (*writerfn)(const char*, void*),
void* writerfn_arg, void* pc, int framesize,
const char* const prefix) {
char buf[100];
if (framesize <= 0) {
snprintf(buf, sizeof(buf), "%s@ %*p (unknown)\n", prefix,
kPrintfPointerFieldWidth, pc);
} else {
snprintf(buf, sizeof(buf), "%s@ %*p %9d\n", prefix,
kPrintfPointerFieldWidth, pc, framesize);
}
writerfn(buf, writerfn_arg);
}
void DumpPCAndFrameSizesAndStackTrace(
void* pc, void* const stack[], int frame_sizes[], int depth,
int min_dropped_frames, bool symbolize_stacktrace,
void (*writerfn)(const char*, void*), void* writerfn_arg) {
void DumpPCAndFrameSizesAndStackTrace(void* const pc, void* const stack[],
int frame_sizes[], int depth,
int min_dropped_frames,
bool symbolize_stacktrace,
OutputWriter* writer, void* writer_arg) {
if (pc != nullptr) {
// We don't know the stack frame size for PC, use 0.
if (symbolize_stacktrace) {
DumpPCAndFrameSizeAndSymbol(writerfn, writerfn_arg, pc, pc, 0, "PC: ");
DumpPCAndFrameSizeAndSymbol(writer, writer_arg, pc, pc, 0, "PC: ");
} else {
DumpPCAndFrameSize(writerfn, writerfn_arg, pc, 0, "PC: ");
DumpPCAndFrameSize(writer, writer_arg, pc, 0, "PC: ");
}
}
for (int i = 0; i < depth; i++) {
@@ -182,22 +253,63 @@ void DumpPCAndFrameSizesAndStackTrace(
// call to a function annotated noreturn (e.g. CHECK). Note that we don't
// do this for pc above, as the adjustment is only correct for return
// addresses.
DumpPCAndFrameSizeAndSymbol(writerfn, writerfn_arg, stack[i],
DumpPCAndFrameSizeAndSymbol(writer, writer_arg, stack[i],
reinterpret_cast<char*>(stack[i]) - 1,
frame_sizes[i], " ");
} else {
DumpPCAndFrameSize(writerfn, writerfn_arg, stack[i], frame_sizes[i],
" ");
DumpPCAndFrameSize(writer, writer_arg, stack[i], frame_sizes[i], " ");
}
}
if (min_dropped_frames > 0) {
char buf[100];
snprintf(buf, sizeof(buf), " @ ... and at least %d more frames\n",
min_dropped_frames);
writerfn(buf, writerfn_arg);
writer(buf, writer_arg);
}
}
// Dump current stack trace as directed by writer.
// Make sure this function is not inlined to avoid skipping too many top frames.
ABSL_ATTRIBUTE_NOINLINE
void DumpStackTrace(int min_dropped_frames, int max_num_frames,
bool symbolize_stacktrace, OutputWriter* writer,
void* writer_arg) {
// Print stack trace
void* stack_buf[kDefaultDumpStackFramesLimit];
void** stack = stack_buf;
int num_stack = kDefaultDumpStackFramesLimit;
int allocated_bytes = 0;
if (num_stack >= max_num_frames) {
// User requested fewer frames than we already have space for.
num_stack = max_num_frames;
} else {
const size_t needed_bytes = max_num_frames * sizeof(stack[0]);
void* p = Allocate(needed_bytes);
if (p != nullptr) { // We got the space.
num_stack = max_num_frames;
stack = reinterpret_cast<void**>(p);
allocated_bytes = needed_bytes;
}
}
size_t depth = absl::GetStackTrace(stack, num_stack, min_dropped_frames + 1);
for (size_t i = 0; i < depth; i++) {
if (symbolize_stacktrace) {
DumpPCAndSymbol(writer, writer_arg, stack[i], " ");
} else {
DumpPC(writer, writer_arg, stack[i], " ");
}
}
auto hook = GetDebugStackTraceHook();
if (hook != nullptr) {
(*hook)(stack, depth, writer, writer_arg);
}
if (allocated_bytes != 0) Deallocate(stack, allocated_bytes);
}
} // namespace debugging_internal
ABSL_NAMESPACE_END
} // namespace absl

34
third_party/abseil-cpp/absl/debugging/internal/examine_stack.h vendored
View File

@@ -23,17 +23,39 @@ namespace absl {
ABSL_NAMESPACE_BEGIN
namespace debugging_internal {
// Type of function used for printing in stack trace dumping, etc.
// We avoid closures to keep things simple.
typedef void OutputWriter(const char*, void*);
// RegisterDebugStackTraceHook() allows to register a single routine
// `hook` that is called each time DumpStackTrace() is called.
// `hook` may be called from a signal handler.
typedef void (*SymbolizeUrlEmitter)(void* const stack[], int depth,
OutputWriter* writer, void* writer_arg);
// Registration of SymbolizeUrlEmitter for use inside of a signal handler.
// This is inherently unsafe and must be signal safe code.
void RegisterDebugStackTraceHook(SymbolizeUrlEmitter hook);
SymbolizeUrlEmitter GetDebugStackTraceHook();
// Returns the program counter from signal context, or nullptr if
// unknown. `vuc` is a ucontext_t*. We use void* to avoid the use of
// ucontext_t on non-POSIX systems.
void* GetProgramCounter(void* vuc);
void* GetProgramCounter(void* const vuc);
// Uses `writerfn` to dump the program counter, stack trace, and stack
// Uses `writer` to dump the program counter, stack trace, and stack
// frame sizes.
void DumpPCAndFrameSizesAndStackTrace(
void* pc, void* const stack[], int frame_sizes[], int depth,
int min_dropped_frames, bool symbolize_stacktrace,
void (*writerfn)(const char*, void*), void* writerfn_arg);
void DumpPCAndFrameSizesAndStackTrace(void* const pc, void* const stack[],
int frame_sizes[], int depth,
int min_dropped_frames,
bool symbolize_stacktrace,
OutputWriter* writer, void* writer_arg);
// Dump current stack trace omitting the topmost `min_dropped_frames` stack
// frames.
void DumpStackTrace(int min_dropped_frames, int max_num_frames,
bool symbolize_stacktrace, OutputWriter* writer,
void* writer_arg);
} // namespace debugging_internal
ABSL_NAMESPACE_END

11
third_party/abseil-cpp/absl/debugging/internal/stacktrace_aarch64-inl.inc vendored
View File

@@ -176,12 +176,17 @@ static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
// Implementation detail: we clamp the max of frames we are willing to
// count, so as not to spend too much time in the loop below.
const int kMaxUnwind = 200;
int j = 0;
for (; frame_pointer != nullptr && j < kMaxUnwind; j++) {
int num_dropped_frames = 0;
for (int j = 0; frame_pointer != nullptr && j < kMaxUnwind; j++) {
if (skip_count > 0) {
skip_count--;
} else {
num_dropped_frames++;
}
frame_pointer =
NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(frame_pointer, ucp);
}
*min_dropped_frames = j;
*min_dropped_frames = num_dropped_frames;
}
return n;
}

11
third_party/abseil-cpp/absl/debugging/internal/stacktrace_arm-inl.inc vendored
View File

@@ -112,11 +112,16 @@ static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
// Implementation detail: we clamp the max of frames we are willing to
// count, so as not to spend too much time in the loop below.
const int kMaxUnwind = 200;
int j = 0;
for (; sp != nullptr && j < kMaxUnwind; j++) {
int num_dropped_frames = 0;
for (int j = 0; sp != nullptr && j < kMaxUnwind; j++) {
if (skip_count > 0) {
skip_count--;
} else {
num_dropped_frames++;
}
sp = NextStackFrame<!IS_STACK_FRAMES>(sp);
}
*min_dropped_frames = j;
*min_dropped_frames = num_dropped_frames;
}
return n;
}

14
third_party/abseil-cpp/absl/debugging/internal/stacktrace_config.h vendored
View File

@@ -35,9 +35,10 @@
// Thread local support required for UnwindImpl.
#define ABSL_STACKTRACE_INL_HEADER \
"absl/debugging/internal/stacktrace_generic-inl.inc"
#endif
#endif // defined(ABSL_HAVE_THREAD_LOCAL)
#elif defined(__EMSCRIPTEN__)
// Emscripten stacktraces rely on JS. Do not use them in standalone mode.
#elif defined(__EMSCRIPTEN__) && !defined(STANDALONE_WASM)
#define ABSL_STACKTRACE_INL_HEADER \
"absl/debugging/internal/stacktrace_emscripten-inl.inc"
@@ -55,7 +56,7 @@
// Note: When using glibc this may require -funwind-tables to function properly.
#define ABSL_STACKTRACE_INL_HEADER \
"absl/debugging/internal/stacktrace_generic-inl.inc"
#endif
#endif // __has_include(<execinfo.h>)
#elif defined(__i386__) || defined(__x86_64__)
#define ABSL_STACKTRACE_INL_HEADER \
"absl/debugging/internal/stacktrace_x86-inl.inc"
@@ -73,9 +74,10 @@
// Note: When using glibc this may require -funwind-tables to function properly.
#define ABSL_STACKTRACE_INL_HEADER \
"absl/debugging/internal/stacktrace_generic-inl.inc"
#endif
#endif
#endif
#endif // __has_include(<execinfo.h>)
#endif // defined(__has_include)
#endif // defined(__linux__) && !defined(__ANDROID__)
// Fallback to the empty implementation.
#if !defined(ABSL_STACKTRACE_INL_HEADER)

11
third_party/abseil-cpp/absl/debugging/internal/stacktrace_powerpc-inl.inc vendored
View File

@@ -231,11 +231,16 @@ static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
// Implementation detail: we clamp the max of frames we are willing to
// count, so as not to spend too much time in the loop below.
const int kMaxUnwind = 1000;
int j = 0;
for (; next_sp != nullptr && j < kMaxUnwind; j++) {
int num_dropped_frames = 0;
for (int j = 0; next_sp != nullptr && j < kMaxUnwind; j++) {
if (skip_count > 0) {
skip_count--;
} else {
num_dropped_frames++;
}
next_sp = NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(next_sp, ucp);
}
*min_dropped_frames = j;
*min_dropped_frames = num_dropped_frames;
}
return n;
}

53
third_party/abseil-cpp/absl/debugging/internal/stacktrace_riscv-inl.inc vendored
View File

@@ -56,7 +56,7 @@ static const unsigned char *GetKernelRtSigreturnAddress() {
absl::debugging_internal::VDSOSupport::SymbolInfo symbol_info;
// Symbol versioning pulled from arch/riscv/kernel/vdso/vdso.lds at v5.10.
auto lookup = [&](int type) {
return vdso.LookupSymbol("__kernel_rt_sigreturn", "LINUX_4.15", type,
return vdso.LookupSymbol("__vdso_rt_sigreturn", "LINUX_4.15", type,
&symbol_info);
};
if ((!lookup(STT_FUNC) && !lookup(STT_NOTYPE)) ||
@@ -159,6 +159,21 @@ static void ** NextStackFrame(void **old_frame_pointer, const void *uc) {
const uintptr_t max_size = STRICT_UNWINDING ? 100000 : 1000000;
const uintptr_t frame_size =
ComputeStackFrameSize(old_frame_pointer, new_frame_pointer);
// If we have a alternate signal stack, the stack pointer may not be
// contiguous. In such a case, we can simply skip the check and assume that
// the non-contiguity is permissible.
if (frame_size == kUnknownFrameSize) {
assert(old_frame_pointer >= new_frame_pointer);
stack_t ss{};
if (sigaltstack(nullptr, &ss) == 0) {
if (ss.ss_flags & SS_DISABLE)
return nullptr;
return new_frame_pointer;
}
}
if (frame_size == kUnknownFrameSize || frame_size > max_size)
return nullptr;
}
@@ -171,26 +186,21 @@ ABSL_ATTRIBUTE_NO_SANITIZE_ADDRESS // May read random elements from stack.
ABSL_ATTRIBUTE_NO_SANITIZE_MEMORY // May read random elements from stack.
static int UnwindImpl(void **result, int *sizes, int max_depth, int skip_count,
const void *ucp, int *min_dropped_frames) {
// The `frame_pointer` that is computed here points to the top of the frame.
// The two words preceding the address are the return address and the previous
// frame pointer.
#if defined(__GNUC__)
void **frame_pointer = reinterpret_cast<void **>(__builtin_frame_address(0));
#else
#error reading stack pointer not yet supported on this platform
#endif
skip_count++; // Skip the frame for this function.
int n = 0;
// The `frame_pointer` that is computed here points to the top of the frame.
// The two words preceding the address are the return address and the previous
// frame pointer. To find a PC value associated with the current frame, we
// need to go down a level in the call chain. So we remember the return
// address of the last frame seen. This does not work for the first stack
// frame, which belongs to `UnwindImp()` but we skip the frame for
// `UnwindImp()` anyway.
void *prev_return_address = nullptr;
void *return_address = nullptr;
while (frame_pointer && n < max_depth) {
// The absl::GetStackFrames routine si called when we are in some
return_address = frame_pointer[-1];
// The absl::GetStackFrames routine is called when we are in some
// informational context (the failure signal handler for example). Use the
// non-strict unwinding rules to produce a stack trace that is as complete
// as possible (even if it contains a few bogus entries in some rare cases).
@@ -200,26 +210,33 @@ static int UnwindImpl(void **result, int *sizes, int max_depth, int skip_count,
if (skip_count > 0) {
skip_count--;
} else {
result[n] = prev_return_address;
result[n] = return_address;
if (IS_STACK_FRAMES) {
sizes[n] = ComputeStackFrameSize(frame_pointer, next_frame_pointer);
}
n++;
}
prev_return_address = frame_pointer[-1];
frame_pointer = next_frame_pointer;
}
if (min_dropped_frames != nullptr) {
// Implementation detail: we clamp the max of frames we are willing to
// count, so as not to spend too much time in the loop below.
const int kMaxUnwind = 200;
int j = 0;
for (; frame_pointer != nullptr && j < kMaxUnwind; j++) {
int num_dropped_frames = 0;
for (int j = 0; frame_pointer != nullptr && j < kMaxUnwind; j++) {
if (skip_count > 0) {
skip_count--;
} else {
num_dropped_frames++;
}
frame_pointer =
NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(frame_pointer, ucp);
}
*min_dropped_frames = j;
*min_dropped_frames = num_dropped_frames;
}
return n;
}

36
third_party/abseil-cpp/absl/debugging/internal/stacktrace_x86-inl.inc vendored
View File

@@ -27,6 +27,7 @@
#include <cassert>
#include <cstdint>
#include <limits>
#include "absl/base/macros.h"
#include "absl/base/port.h"
@@ -158,7 +159,8 @@ static uintptr_t GetFP(const void *vuc) {
template <bool STRICT_UNWINDING, bool WITH_CONTEXT>
ABSL_ATTRIBUTE_NO_SANITIZE_ADDRESS // May read random elements from stack.
ABSL_ATTRIBUTE_NO_SANITIZE_MEMORY // May read random elements from stack.
static void **NextStackFrame(void **old_fp, const void *uc) {
static void **NextStackFrame(void **old_fp, const void *uc,
size_t stack_low, size_t stack_high) {
void **new_fp = (void **)*old_fp;
#if defined(__linux__) && defined(__i386__)
@@ -257,6 +259,18 @@ static void **NextStackFrame(void **old_fp, const void *uc) {
// at a greater address that the current one.
if (new_fp_u <= old_fp_u) return nullptr;
if (new_fp_u - old_fp_u > kMaxFrameBytes) return nullptr;
if (stack_low < old_fp_u && old_fp_u <= stack_high) {
// Old BP was in the expected stack region...
if (!(stack_low < new_fp_u && new_fp_u <= stack_high)) {
// ... but new BP is outside of expected stack region.
// It is most likely bogus.
return nullptr;
}
} else {
// We may be here if we are executing in a co-routine with a
// separate stack. We can't do safety checks in this case.
}
} else {
if (new_fp == nullptr) return nullptr; // skip AddressIsReadable() below
// In the non-strict mode, allow discontiguous stack frames.
@@ -296,13 +310,17 @@ static int UnwindImpl(void **result, int *sizes, int max_depth, int skip_count,
int n = 0;
void **fp = reinterpret_cast<void **>(__builtin_frame_address(0));
size_t stack_low = getpagesize(); // Assume that the first page is not stack.
size_t stack_high = std::numeric_limits<size_t>::max() - sizeof(void *);
while (fp && n < max_depth) {
if (*(fp + 1) == reinterpret_cast<void *>(0)) {
// In 64-bit code, we often see a frame that
// points to itself and has a return address of 0.
break;
}
void **next_fp = NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(fp, ucp);
void **next_fp = NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(
fp, ucp, stack_low, stack_high);
if (skip_count > 0) {
skip_count--;
} else {
@@ -323,11 +341,17 @@ static int UnwindImpl(void **result, int *sizes, int max_depth, int skip_count,
// Implementation detail: we clamp the max of frames we are willing to
// count, so as not to spend too much time in the loop below.
const int kMaxUnwind = 1000;
int j = 0;
for (; fp != nullptr && j < kMaxUnwind; j++) {
fp = NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(fp, ucp);
int num_dropped_frames = 0;
for (int j = 0; fp != nullptr && j < kMaxUnwind; j++) {
if (skip_count > 0) {
skip_count--;
} else {
num_dropped_frames++;
}
fp = NextStackFrame<!IS_STACK_FRAMES, IS_WITH_CONTEXT>(fp, ucp, stack_low,
stack_high);
}
*min_dropped_frames = j;
*min_dropped_frames = num_dropped_frames;
}
return n;
}

39
third_party/abseil-cpp/absl/debugging/internal/vdso_support.cc vendored
View File

@@ -20,12 +20,25 @@
#ifdef ABSL_HAVE_VDSO_SUPPORT // defined in vdso_support.h
#if !defined(__has_include)
#define __has_include(header) 0
#endif
#include <errno.h>
#include <fcntl.h>
#if __has_include(<syscall.h>)
#include <syscall.h>
#elif __has_include(<sys/syscall.h>)
#include <sys/syscall.h>
#endif
#include <unistd.h>
#if __GLIBC_PREREQ(2, 16) // GLIBC-2.16 implements getauxval.
#if !defined(__UCLIBC__) && defined(__GLIBC__) && \
(__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 16))
#define ABSL_HAVE_GETAUXVAL
#endif
#ifdef ABSL_HAVE_GETAUXVAL
#include <sys/auxv.h>
#endif
@@ -37,6 +50,17 @@
#define AT_SYSINFO_EHDR 33 // for crosstoolv10
#endif
#if defined(__NetBSD__)
using Elf32_auxv_t = Aux32Info;
using Elf64_auxv_t = Aux64Info;
#endif
#if defined(__FreeBSD__)
#if defined(__ELF_WORD_SIZE) && __ELF_WORD_SIZE == 64
using Elf64_auxv_t = Elf64_Auxinfo;
#endif
using Elf32_auxv_t = Elf32_Auxinfo;
#endif
namespace absl {
ABSL_NAMESPACE_BEGIN
namespace debugging_internal {
@@ -45,7 +69,9 @@ ABSL_CONST_INIT
std::atomic<const void *> VDSOSupport::vdso_base_(
debugging_internal::ElfMemImage::kInvalidBase);
std::atomic<VDSOSupport::GetCpuFn> VDSOSupport::getcpu_fn_(&InitAndGetCPU);
ABSL_CONST_INIT 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.
@@ -65,7 +91,7 @@ VDSOSupport::VDSOSupport()
// the operation should be idempotent.
const void *VDSOSupport::Init() {
const auto kInvalidBase = debugging_internal::ElfMemImage::kInvalidBase;
#if __GLIBC_PREREQ(2, 16)
#ifdef ABSL_HAVE_GETAUXVAL
if (vdso_base_.load(std::memory_order_relaxed) == kInvalidBase) {
errno = 0;
const void *const sysinfo_ehdr =
@@ -74,7 +100,7 @@ const void *VDSOSupport::Init() {
vdso_base_.store(sysinfo_ehdr, std::memory_order_relaxed);
}
}
#endif // __GLIBC_PREREQ(2, 16)
#endif // ABSL_HAVE_GETAUXVAL
if (vdso_base_.load(std::memory_order_relaxed) == kInvalidBase) {
int fd = open("/proc/self/auxv", O_RDONLY);
if (fd == -1) {
@@ -86,8 +112,13 @@ const void *VDSOSupport::Init() {
ElfW(auxv_t) aux;
while (read(fd, &aux, sizeof(aux)) == sizeof(aux)) {
if (aux.a_type == AT_SYSINFO_EHDR) {
#if defined(__NetBSD__)
vdso_base_.store(reinterpret_cast<void *>(aux.a_v),
std::memory_order_relaxed);
#else
vdso_base_.store(reinterpret_cast<void *>(aux.a_un.a_val),
std::memory_order_relaxed);
#endif
break;
}
}

44
third_party/abseil-cpp/absl/debugging/leak_check.cc vendored
View File

@@ -11,29 +11,19 @@
// 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/base/attributes.h"
//
// These are always-available run-time functions manipulating the LeakSanitizer,
// even when the lsan_interface (and LeakSanitizer) is not available. When
// LeakSanitizer is not linked in, these functions become no-op stubs.
#include "absl/debugging/leak_check.h"
#ifndef LEAK_SANITIZER
#include "absl/base/attributes.h"
#include "absl/base/config.h"
namespace absl {
ABSL_NAMESPACE_BEGIN
bool HaveLeakSanitizer() { return false; }
bool LeakCheckerIsActive() { return false; }
void DoIgnoreLeak(const void*) { }
void RegisterLivePointers(const void*, size_t) { }
void UnRegisterLivePointers(const void*, size_t) { }
LeakCheckDisabler::LeakCheckDisabler() { }
LeakCheckDisabler::~LeakCheckDisabler() { }
ABSL_NAMESPACE_END
} // namespace absl
#else
#if defined(ABSL_HAVE_LEAK_SANITIZER)
#include <sanitizer/lsan_interface.h>
@@ -66,4 +56,18 @@ LeakCheckDisabler::~LeakCheckDisabler() { __lsan_enable(); }
ABSL_NAMESPACE_END
} // namespace absl
#endif // LEAK_SANITIZER
#else // defined(ABSL_HAVE_LEAK_SANITIZER)
namespace absl {
ABSL_NAMESPACE_BEGIN
bool HaveLeakSanitizer() { return false; }
bool LeakCheckerIsActive() { return false; }
void DoIgnoreLeak(const void*) { }
void RegisterLivePointers(const void*, size_t) { }
void UnRegisterLivePointers(const void*, size_t) { }
LeakCheckDisabler::LeakCheckDisabler() { }
LeakCheckDisabler::~LeakCheckDisabler() { }
ABSL_NAMESPACE_END
} // namespace absl
#endif // defined(ABSL_HAVE_LEAK_SANITIZER)

19
third_party/abseil-cpp/absl/debugging/leak_check.h vendored
View File

@@ -24,7 +24,24 @@
// 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
// https://clang.llvm.org/docs/LeakSanitizer.html
// https://github.com/google/sanitizers/wiki/AddressSanitizerLeakSanitizer
//
// GCC and Clang both automatically enable LeakSanitizer when AddressSanitizer
// is enabled. To use the mode, simply pass `-fsanitize=address` to both the
// compiler and linker. An example Bazel command could be
//
// $ bazel test --copt=-fsanitize=address --linkopt=-fsanitize=address ...
//
// GCC and Clang auto support a standalone LeakSanitizer mode (a mode which does
// not also use AddressSanitizer). To use the mode, simply pass
// `-fsanitize=leak` to both the compiler and linker. Since GCC does not
// currently provide a way of detecting this mode at compile-time, GCC users
// must also pass -DLEAK_SANIITIZER to the compiler. An example Bazel command
// could be
//
// $ bazel test --copt=-DLEAK_SANITIZER --copt=-fsanitize=leak
// --linkopt=-fsanitize=leak ...
//
// -----------------------------------------------------------------------------
#ifndef ABSL_DEBUGGING_LEAK_CHECK_H_

20
third_party/abseil-cpp/absl/debugging/leak_check_disable.cc vendored
View File

@@ -1,20 +0,0 @@
// 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
//
// https://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;
}

17
third_party/abseil-cpp/absl/debugging/leak_check_test.cc vendored
View File

@@ -15,27 +15,24 @@
#include <string>
#include "gtest/gtest.h"
#include "absl/base/config.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());
EXPECT_TRUE(absl::LeakCheckerIsActive());
#else
EXPECT_FALSE(absl::HaveLeakSanitizer());
EXPECT_FALSE(absl::LeakCheckerIsActive());
#endif
}
TEST(LeakCheckTest, IgnoreLeakSuppressesLeakedMemoryErrors) {
if (!absl::LeakCheckerIsActive()) {
GTEST_SKIP() << "LeakChecker is not active";
}
auto foo = absl::IgnoreLeak(new std::string("some ignored leaked string"));
ABSL_RAW_LOG(INFO, "Ignoring leaked string %s", foo->c_str());
}
TEST(LeakCheckTest, LeakCheckDisablerIgnoresLeak) {
if (!absl::LeakCheckerIsActive()) {
GTEST_SKIP() << "LeakChecker is not active";
}
absl::LeakCheckDisabler disabler;
auto foo = new std::string("some string leaked while checks are disabled");
ABSL_RAW_LOG(INFO, "Ignoring leaked string %s", foo->c_str());

55
third_party/abseil-cpp/absl/debugging/stacktrace_benchmark.cc vendored Normal file
View File

@@ -0,0 +1,55 @@
// Copyright 2022 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
//
// https://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/base/attributes.h"
#include "absl/base/config.h"
#include "absl/base/optimization.h"
#include "absl/debugging/stacktrace.h"
#include "benchmark/benchmark.h"
namespace absl {
ABSL_NAMESPACE_BEGIN
namespace {
static constexpr int kMaxStackDepth = 100;
static constexpr int kCacheSize = (1 << 16);
void* pcs[kMaxStackDepth];
ABSL_ATTRIBUTE_NOINLINE void func(benchmark::State& state, int x, int depth) {
if (x <= 0) {
// Touch a significant amount of memory so that the stack is likely to be
// not cached in the L1 cache.
state.PauseTiming();
int* arr = new int[kCacheSize];
for (int i = 0; i < kCacheSize; ++i) benchmark::DoNotOptimize(arr[i] = 100);
delete[] arr;
state.ResumeTiming();
benchmark::DoNotOptimize(absl::GetStackTrace(pcs, depth, 0));
return;
}
ABSL_BLOCK_TAIL_CALL_OPTIMIZATION();
func(state, --x, depth);
}
void BM_GetStackTrace(benchmark::State& state) {
int depth = state.range(0);
for (auto s : state) {
func(state, depth, depth);
}
}
BENCHMARK(BM_GetStackTrace)->DenseRange(10, kMaxStackDepth, 10);
} // namespace
ABSL_NAMESPACE_END
} // namespace absl

7
third_party/abseil-cpp/absl/debugging/symbolize.cc vendored
View File

@@ -23,6 +23,11 @@
#endif
#endif
// Emscripten symbolization relies on JS. Do not use them in standalone mode.
#if defined(__EMSCRIPTEN__) && !defined(STANDALONE_WASM)
#define ABSL_INTERNAL_HAVE_SYMBOLIZE_WASM
#endif
#if defined(ABSL_INTERNAL_HAVE_ELF_SYMBOLIZE)
#include "absl/debugging/symbolize_elf.inc"
#elif defined(ABSL_INTERNAL_HAVE_SYMBOLIZE_WIN32)
@@ -31,7 +36,7 @@
#include "absl/debugging/symbolize_win32.inc"
#elif defined(__APPLE__)
#include "absl/debugging/symbolize_darwin.inc"
#elif defined(__EMSCRIPTEN__)
#elif defined(ABSL_INTERNAL_HAVE_SYMBOLIZE_WASM)
#include "absl/debugging/symbolize_emscripten.inc"
#else
#include "absl/debugging/symbolize_unimplemented.inc"

57
third_party/abseil-cpp/absl/debugging/symbolize_elf.inc vendored
View File

@@ -77,6 +77,10 @@
#include "absl/debugging/internal/vdso_support.h"
#include "absl/strings/string_view.h"
#if defined(__FreeBSD__) && !defined(ElfW)
#define ElfW(x) __ElfN(x)
#endif
namespace absl {
ABSL_NAMESPACE_BEGIN
@@ -319,6 +323,7 @@ class Symbolizer {
const ptrdiff_t relocation,
char *out, int out_size,
char *tmp_buf, int tmp_buf_size);
const char *GetUncachedSymbol(const void *pc);
enum {
SYMBOL_BUF_SIZE = 3072,
@@ -1141,6 +1146,14 @@ bool Symbolizer::RegisterObjFile(const char *filename,
reinterpret_cast<uintptr_t>(old->end_addr), old->filename);
}
return true;
} else if (old->end_addr == start_addr &&
reinterpret_cast<uintptr_t>(old->start_addr) - old->offset ==
reinterpret_cast<uintptr_t>(start_addr) - offset &&
strcmp(old->filename, filename) == 0) {
// Two contiguous map entries that span a contiguous region of the file,
// perhaps because some part of the file was mlock()ed. Combine them.
old->end_addr = end_addr;
return true;
}
}
ObjFile *obj = impl->addr_map_.Add();
@@ -1329,13 +1342,7 @@ static bool MaybeInitializeObjFile(ObjFile *obj) {
// they are called here as well.
// To keep stack consumption low, we would like this function to not
// get inlined.
const char *Symbolizer::GetSymbol(const void *const pc) {
const char *entry = FindSymbolInCache(pc);
if (entry != nullptr) {
return entry;
}
symbol_buf_[0] = '\0';
const char *Symbolizer::GetUncachedSymbol(const void *pc) {
ObjFile *const obj = FindObjFile(pc, 1);
ptrdiff_t relocation = 0;
int fd = -1;
@@ -1423,6 +1430,42 @@ const char *Symbolizer::GetSymbol(const void *const pc) {
return InsertSymbolInCache(pc, symbol_buf_);
}
const char *Symbolizer::GetSymbol(const void *pc) {
const char *entry = FindSymbolInCache(pc);
if (entry != nullptr) {
return entry;
}
symbol_buf_[0] = '\0';
#ifdef __hppa__
{
// In some contexts (e.g., return addresses), PA-RISC uses the lowest two
// bits of the address to indicate the privilege level. Clear those bits
// before trying to symbolize.
const auto pc_bits = reinterpret_cast<uintptr_t>(pc);
const auto address = pc_bits & ~0x3;
entry = GetUncachedSymbol(reinterpret_cast<const void *>(address));
if (entry != nullptr) {
return entry;
}
// In some contexts, PA-RISC also uses bit 1 of the address to indicate that
// this is a cross-DSO function pointer. Such function pointers actually
// point to a procedure label, a struct whose first 32-bit (pointer) element
// actually points to the function text. With no symbol found for this
// address so far, try interpreting it as a cross-DSO function pointer and
// see how that goes.
if (pc_bits & 0x2) {
return GetUncachedSymbol(*reinterpret_cast<const void *const *>(address));
}
return nullptr;
}
#else
return GetUncachedSymbol(pc);
#endif
}
bool RemoveAllSymbolDecorators(void) {
if (!g_decorators_mu.TryLock()) {
// Someone else is using decorators. Get out.

21
third_party/abseil-cpp/absl/debugging/symbolize_test.cc vendored
View File

@@ -392,12 +392,14 @@ TEST(Symbolize, InstallAndRemoveSymbolDecorators) {
DummySymbolDecorator, &c_message),
0);
char *address = reinterpret_cast<char *>(1);
EXPECT_STREQ("abc", TrySymbolize(address++));
// Use addresses 4 and 8 here to ensure that we always use valid addresses
// even on systems that require instructions to be 32-bit aligned.
char *address = reinterpret_cast<char *>(4);
EXPECT_STREQ("abc", TrySymbolize(address));
EXPECT_TRUE(absl::debugging_internal::RemoveSymbolDecorator(ticket_b));
EXPECT_STREQ("ac", TrySymbolize(address++));
EXPECT_STREQ("ac", TrySymbolize(address + 4));
// Cleanup: remove all remaining decorators so other stack traces don't
// get mystery "ac" decoration.
@@ -481,7 +483,8 @@ void ABSL_ATTRIBUTE_NOINLINE TestWithPCInsideInlineFunction() {
}
}
#if defined(__arm__) && ABSL_HAVE_ATTRIBUTE(target)
#if defined(__arm__) && ABSL_HAVE_ATTRIBUTE(target) && \
((__ARM_ARCH >= 7) || !defined(__ARM_PCS_VFP))
// Test that we correctly identify bounds of Thumb functions on ARM.
//
// Thumb functions have the lowest-order bit set in their addresses in the ELF
@@ -500,6 +503,10 @@ void ABSL_ATTRIBUTE_NOINLINE TestWithPCInsideInlineFunction() {
// bit in the Thumb function's entry point. It will correctly compute the end of
// the Thumb function, it will find no overlap between the Thumb and ARM
// functions, and it will return the name of the ARM function.
//
// Unfortunately we cannot perform this test on armv6 or lower systems that use
// the hard float ABI because gcc refuses to compile thumb functions on such
// systems with a "sorry, unimplemented: Thumb-1 hard-float VFP ABI" error.
__attribute__((target("thumb"))) int ArmThumbOverlapThumb(int x) {
return x * x * x;
@@ -519,7 +526,8 @@ void ABSL_ATTRIBUTE_NOINLINE TestArmThumbOverlap() {
#endif
}
#endif // defined(__arm__) && ABSL_HAVE_ATTRIBUTE(target)
#endif // defined(__arm__) && ABSL_HAVE_ATTRIBUTE(target) && ((__ARM_ARCH >= 7)
// || !defined(__ARM_PCS_VFP))
#elif defined(_WIN32)
#if !defined(ABSL_CONSUME_DLL)
@@ -594,7 +602,8 @@ int main(int argc, char **argv) {
TestWithPCInsideInlineFunction();
TestWithPCInsideNonInlineFunction();
TestWithReturnAddress();
#if defined(__arm__) && ABSL_HAVE_ATTRIBUTE(target)
#if defined(__arm__) && ABSL_HAVE_ATTRIBUTE(target) && \
((__ARM_ARCH >= 7) || !defined(__ARM_PCS_VFP))
TestArmThumbOverlap();
#endif
#endif