Squashed 'third_party/allwpilib/' content from commit b0167e633
Change-Id: I5653017a690eec1917e8fff9017195d8af307926
git-subtree-dir: third_party/allwpilib
git-subtree-split: b0167e6337135545e7053acb89dd5726accc7dec
diff --git a/wpiutil/src/main/native/unix/Demangle.cpp b/wpiutil/src/main/native/unix/Demangle.cpp
new file mode 100644
index 0000000..1ce4f31
--- /dev/null
+++ b/wpiutil/src/main/native/unix/Demangle.cpp
@@ -0,0 +1,36 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2008-2019 FIRST. All Rights Reserved. */
+/* Open Source Software - may be modified and shared by FRC teams. The code */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project. */
+/*----------------------------------------------------------------------------*/
+
+#include "wpi/Demangle.h"
+
+#include <cxxabi.h>
+
+#include <cstdio>
+
+namespace wpi {
+
+std::string Demangle(char const* mangledSymbol) {
+ char buffer[256];
+ size_t length;
+ int32_t status;
+
+ if (std::sscanf(mangledSymbol, "%*[^(]%*[(]%255[^)+]", buffer)) {
+ char* symbol = abi::__cxa_demangle(buffer, nullptr, &length, &status);
+ if (status == 0) {
+ return symbol;
+ } else {
+ // If the symbol couldn't be demangled, it's probably a C function,
+ // so just return it as-is.
+ return buffer;
+ }
+ }
+
+ // If everything else failed, just return the mangled symbol
+ return mangledSymbol;
+}
+
+} // namespace wpi
diff --git a/wpiutil/src/main/native/unix/StackTrace.cpp b/wpiutil/src/main/native/unix/StackTrace.cpp
new file mode 100644
index 0000000..be28080
--- /dev/null
+++ b/wpiutil/src/main/native/unix/StackTrace.cpp
@@ -0,0 +1,37 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2008-2019 FIRST. All Rights Reserved. */
+/* Open Source Software - may be modified and shared by FRC teams. The code */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project. */
+/*----------------------------------------------------------------------------*/
+
+#include "wpi/StackTrace.h"
+
+#include <execinfo.h>
+
+#include "wpi/Demangle.h"
+#include "wpi/SmallString.h"
+#include "wpi/raw_ostream.h"
+
+namespace wpi {
+
+std::string GetStackTrace(int offset) {
+ void* stackTrace[128];
+ int stackSize = backtrace(stackTrace, 128);
+ char** mangledSymbols = backtrace_symbols(stackTrace, stackSize);
+ wpi::SmallString<1024> buf;
+ wpi::raw_svector_ostream trace(buf);
+
+ for (int i = offset; i < stackSize; i++) {
+ // Only print recursive functions once in a row.
+ if (i == 0 || stackTrace[i] != stackTrace[i - 1]) {
+ trace << "\tat " << Demangle(mangledSymbols[i]) << "\n";
+ }
+ }
+
+ std::free(mangledSymbols);
+
+ return trace.str();
+}
+
+} // namespace wpi