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// Routines useful when debugging the Rust runtime.
#include "rust_debug.h"
#include "rust_internal.h"
#include <iostream>
#include <string>
#include <sstream>
#include <stdint.h>
#if defined(__APPLE__) || defined(__linux__)
#define HAVE_BACKTRACE
#include <execinfo.h>
#elif defined(_WIN32)
#include <windows.h>
#endif
namespace {
debug::flag track_origins("RUST_TRACK_ORIGINS");
} // end anonymous namespace
namespace debug {
#ifdef HAVE_BACKTRACE
std::string
backtrace() {
void *call_stack[128];
int n_frames = ::backtrace(call_stack, 128);
char **syms = backtrace_symbols(call_stack, n_frames);
std::cerr << "n_frames: " << n_frames << std::endl;
std::stringstream ss;
for (int i = 0; i < n_frames; i++) {
std::cerr << syms[i] << std::endl;
ss << syms[i] << std::endl;
}
free(syms);
return ss.str();
}
#else
std::string
backtrace() {
std::string s;
return s;
}
#endif
void
maybe_track_origin(rust_task *task, void *ptr) {
if (!*track_origins)
return;
task->debug.origins[ptr] = backtrace();
}
void
maybe_untrack_origin(rust_task *task, void *ptr) {
if (!*track_origins)
return;
task->debug.origins.erase(ptr);
}
// This function is intended to be called by the debugger.
void
dump_origin(rust_task *task, void *ptr) {
if (!*track_origins) {
std::cerr << "Try again with RUST_TRACK_ORIGINS=1." << std::endl;
} else if (task->debug.origins.find(ptr) == task->debug.origins.end()) {
std::cerr << "Pointer " << std::hex << (uintptr_t)ptr <<
" does not have a tracked origin.";
} else {
std::cerr << "Origin of pointer " << std::hex << ":" << std::endl <<
task->debug.origins[ptr];
}
}
} // end namespace debug
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