summaryrefslogtreecommitdiff
path: root/boost/stacktrace/detail/addr2line_impls.hpp
diff options
context:
space:
mode:
Diffstat (limited to 'boost/stacktrace/detail/addr2line_impls.hpp')
-rw-r--r--boost/stacktrace/detail/addr2line_impls.hpp225
1 files changed, 225 insertions, 0 deletions
diff --git a/boost/stacktrace/detail/addr2line_impls.hpp b/boost/stacktrace/detail/addr2line_impls.hpp
new file mode 100644
index 0000000000..e314fe9f31
--- /dev/null
+++ b/boost/stacktrace/detail/addr2line_impls.hpp
@@ -0,0 +1,225 @@
+// Copyright Antony Polukhin, 2016-2017.
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_STACKTRACE_DETAIL_ADDR2LINE_IMPLS_HPP
+#define BOOST_STACKTRACE_DETAIL_ADDR2LINE_IMPLS_HPP
+
+#include <boost/config.hpp>
+#ifdef BOOST_HAS_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <boost/stacktrace/detail/to_hex_array.hpp>
+#include <boost/core/demangle.hpp>
+#include <boost/lexical_cast.hpp>
+#include <cstdio>
+
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <signal.h>
+
+
+namespace boost { namespace stacktrace { namespace detail {
+
+
+#if defined(BOOST_STACKTRACE_ADDR2LINE_LOCATION) && !defined(BOOST_NO_CXX11_CONSTEXPR)
+
+constexpr bool is_abs_path(const char* path) BOOST_NOEXCEPT {
+ return *path != '\0' && (
+ *path == ':' || *path == '/' || is_abs_path(path + 1)
+ );
+}
+
+#endif
+
+class addr2line_pipe {
+ ::FILE* p;
+ ::pid_t pid;
+
+public:
+ explicit addr2line_pipe(const char *flag, const char* exec_path, const char* addr) BOOST_NOEXCEPT
+ : p(0)
+ , pid(0)
+ {
+ int pdes[2];
+ #ifdef BOOST_STACKTRACE_ADDR2LINE_LOCATION
+ char prog_name[] = BOOST_STRINGIZE( BOOST_STACKTRACE_ADDR2LINE_LOCATION );
+ #if !defined(BOOST_NO_CXX11_CONSTEXPR) && !defined(BOOST_NO_CXX11_STATIC_ASSERT)
+ static_assert(
+ boost::stacktrace::detail::is_abs_path( BOOST_STRINGIZE( BOOST_STACKTRACE_ADDR2LINE_LOCATION ) ),
+ "BOOST_STACKTRACE_ADDR2LINE_LOCATION must be an absolute path"
+ );
+ #endif
+
+ #else
+ char prog_name[] = "/usr/bin/addr2line";
+ #endif
+
+ char* argp[] = {
+ prog_name,
+ const_cast<char*>(flag),
+ const_cast<char*>(exec_path),
+ const_cast<char*>(addr),
+ 0
+ };
+
+ if (::pipe(pdes) < 0) {
+ return;
+ }
+
+ pid = ::fork();
+ switch (pid) {
+ case -1:
+ // Failed...
+ ::close(pdes[0]);
+ ::close(pdes[1]);
+ return;
+
+ case 0:
+ // We are the child.
+ ::close(STDERR_FILENO);
+ ::close(pdes[0]);
+ if (pdes[1] != STDOUT_FILENO) {
+ ::dup2(pdes[1], STDOUT_FILENO);
+ }
+
+ // Do not use `execlp()`, `execvp()`, and `execvpe()` here!
+ // `exec*p*` functions are vulnerable to PATH variable evaluation attacks.
+ ::execv(prog_name, argp);
+ ::_exit(127);
+ }
+
+ p = ::fdopen(pdes[0], "r");
+ ::close(pdes[1]);
+ }
+
+ operator ::FILE*() const BOOST_NOEXCEPT {
+ return p;
+ }
+
+ ~addr2line_pipe() BOOST_NOEXCEPT {
+ if (p) {
+ ::fclose(p);
+ int pstat = 0;
+ ::kill(pid, SIGKILL);
+ ::waitpid(pid, &pstat, 0);
+ }
+ }
+};
+
+inline std::string addr2line(const char* flag, const void* addr) {
+ std::string res;
+
+ boost::stacktrace::detail::location_from_symbol loc(addr);
+ if (!loc.empty()) {
+ res = loc.name();
+ } else {
+ res.resize(16);
+ int rlin_size = ::readlink("/proc/self/exe", &res[0], res.size() - 1);
+ while (rlin_size == static_cast<int>(res.size() - 1)) {
+ res.resize(res.size() * 4);
+ rlin_size = ::readlink("/proc/self/exe", &res[0], res.size() - 1);
+ }
+ if (rlin_size == -1) {
+ res.clear();
+ return res;
+ }
+ res.resize(rlin_size);
+ }
+
+ addr2line_pipe p(flag, res.c_str(), to_hex_array(addr).data());
+ res.clear();
+
+ if (!p) {
+ return res;
+ }
+
+ char data[32];
+ while (!::feof(p)) {
+ if (::fgets(data, sizeof(data), p)) {
+ res += data;
+ } else {
+ break;
+ }
+ }
+
+ // Trimming
+ while (!res.empty() && (res[res.size() - 1] == '\n' || res[res.size() - 1] == '\r')) {
+ res.erase(res.size() - 1);
+ }
+
+ return res;
+}
+
+
+struct to_string_using_addr2line {
+ std::string res;
+ void prepare_function_name(const void* addr) {
+ res = boost::stacktrace::frame(addr).name();
+ }
+
+ bool prepare_source_location(const void* addr) {
+ //return addr2line("-Cfipe", addr); // Does not seem to work in all cases
+ std::string source_line = boost::stacktrace::detail::addr2line("-Cpe", addr);
+ if (!source_line.empty() && source_line[0] != '?') {
+ res += " at ";
+ res += source_line;
+ return true;
+ }
+
+ return false;
+ }
+};
+
+template <class Base> class to_string_impl_base;
+typedef to_string_impl_base<to_string_using_addr2line> to_string_impl;
+
+inline std::string name_impl(const void* addr) {
+ std::string res = boost::stacktrace::detail::addr2line("-fe", addr);
+ res = res.substr(0, res.find_last_of('\n'));
+ res = boost::core::demangle(res.c_str());
+
+ if (res == "??") {
+ res.clear();
+ }
+
+ return res;
+}
+
+} // namespace detail
+
+std::string frame::source_file() const {
+ std::string res;
+ res = boost::stacktrace::detail::addr2line("-e", addr_);
+ res = res.substr(0, res.find_last_of(':'));
+ if (res == "??") {
+ res.clear();
+ }
+
+ return res;
+}
+
+
+std::size_t frame::source_line() const {
+ std::size_t line_num = 0;
+ std::string res = boost::stacktrace::detail::addr2line("-e", addr_);
+ const std::size_t last = res.find_last_of(':');
+ if (last == std::string::npos) {
+ return 0;
+ }
+ res = res.substr(last + 1);
+
+ if (!boost::conversion::try_lexical_convert(res, line_num)) {
+ return 0;
+ }
+
+ return line_num;
+}
+
+
+}} // namespace boost::stacktrace
+
+#endif // BOOST_STACKTRACE_DETAIL_ADDR2LINE_IMPLS_HPP