71 lines
1.6 KiB
C++
71 lines
1.6 KiB
C++
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// Routines useful when debugging the Rust runtime.
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#include "rust_debug.h"
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#include "rust_internal.h"
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#include <iostream>
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#include <string>
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#include <sstream>
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#include <stdint.h>
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#if defined(__APPLE__) || defined(__linux__)
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#define HAVE_BACKTRACE
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#include <execinfo.h>
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#elif defined(_WIN32)
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#include <windows.h>
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#endif
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namespace {
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debug::flag track_origins("RUST_TRACK_ORIGINS");
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} // end anonymous namespace
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namespace debug {
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std::string
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backtrace() {
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void *call_stack[256];
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int n_frames = ::backtrace(call_stack, 256);
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char **syms = backtrace_symbols(call_stack, n_frames);
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std::stringstream ss;
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for (int i = 0; i < n_frames; i++)
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ss << syms[i] << std::endl;
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free(syms);
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return ss.str();
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}
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void
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maybe_track_origin(rust_task *task, void *ptr) {
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if (!*track_origins)
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return;
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task->debug.origins[ptr] = backtrace();
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}
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void
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maybe_untrack_origin(rust_task *task, void *ptr) {
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if (!*track_origins)
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return;
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task->debug.origins.erase(ptr);
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}
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// This function is intended to be called by the debugger.
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void
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dump_origin(rust_task *task, void *ptr) {
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if (!*track_origins) {
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std::cerr << "Try again with RUST_TRACK_ORIGINS=1." << std::endl;
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} else if (task->debug.origins.find(ptr) == task->debug.origins.end()) {
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std::cerr << "Pointer " << std::hex << (uintptr_t)ptr <<
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" does not have a tracked origin.";
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} else {
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std::cerr << "Origin of pointer " << std::hex << ":" << std::endl <<
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task->debug.origins[ptr];
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}
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}
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} // end namespace debug
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