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fix include of <execinfo.h> #1047

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merged 1 commit into from
Mar 16, 2020
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fix include of <execinfo.h> #1047

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5 changes: 5 additions & 0 deletions ChangeLog
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Original file line number Diff line number Diff line change
@@ -1,3 +1,8 @@
2020-03-15 Kevin Ushey <kevinushey@gmail.com>

* inst/include/Rcpp/exceptions_impl.h: Ensure <execinfo.h> is included
into global namespace; refactor detection of demangler support

2020-03-13 Dirk Eddelbuettel <edd@debian.org>

* DESCRIPTION (Date, Version): Release 1.0.4
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41 changes: 28 additions & 13 deletions inst/include/Rcpp/exceptions_impl.h
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Expand Up @@ -18,16 +18,33 @@
// You should have received a copy of the GNU General Public License
// along with Rcpp. If not, see <http://www.gnu.org/licenses/>.

// disable demangler on platforms where we have no support
#ifndef RCPP_DEMANGLER_ENABLED
# if defined(_WIN32) || \
defined(__FreeBSD__) || \
defined(__NetBSD__) || \
defined(__OpenBSD__) || \
defined(__CYGWIN__) || \
defined(__sun) || \
defined(_AIX) || \
defined(__MUSL__) || \
defined(__HAIKU__) || \
defined(__ANDROID__)
# define RCPP_DEMANGLER_ENABLED 0
# elif defined(__GNUC__) || defined(__clang__)
# include <execinfo.h>
# define RCPP_DEMANGLER_ENABLED 1
# endif
#endif

namespace Rcpp {
#if defined(__GNUC__) || defined(__clang__)
#if defined(_WIN32) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__CYGWIN__) || defined(__sun) || defined(_AIX) || defined(__MUSL__) || defined(__HAIKU__) || defined(__ANDROID__)
// do nothing
#else
#include <execinfo.h>

// Extract mangled name e.g. ./test(baz+0x14)[0x400962]
#if RCPP_DEMANGLER_ENABLED
static std::string demangler_one(const char* input) { // #nocov start

static std::string buffer;

buffer = input;
size_t last_open = buffer.find_last_of('(');
size_t last_close = buffer.find_last_of(')');
Expand All @@ -42,19 +59,16 @@ namespace Rcpp {
function_name.resize(function_plus);
}
buffer.replace(last_open + 1, function_name.size(), demangle(function_name));

return buffer;

}
#endif
#endif

// thread-safe; invoked prior to throwing the exception
inline void exception::record_stack_trace()
{
#if defined(__GNUC__) || defined(__clang__)
#if defined(_WIN32) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__CYGWIN__) || defined(__sun) || defined(_AIX) || defined(__MUSL__) || defined(__HAIKU__) || defined(__ANDROID__)
// C++ stack not available on this system
#else // ! (defined(_WIN32) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__CYGWIN__) || defined(__sun) || defined(_AIX) || defined(__ANDROID__)

#if RCPP_DEMANGLER_ENABLED
/* inspired from http://tombarta.wordpress.com/2008/08/01/c-stack-traces-with-gcc/ */
const size_t max_depth = 100;
int stack_depth;
Expand All @@ -66,8 +80,7 @@ namespace Rcpp {
std::transform(stack_strings + 1, stack_strings + stack_depth,
std::back_inserter(stack), demangler_one);
free(stack_strings); // malloc()ed by backtrace_symbols
#endif
#endif
#endif
}

// not thread-safe; invoked after catching the exception
Expand All @@ -86,4 +99,6 @@ namespace Rcpp {
trace.attr("class") = "Rcpp_stack_trace";
rcpp_set_stack_trace(trace); // #nocov end
}

}