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// ABI-specific routines.
#include <sstream>
#include <string>
#include <vector>
#include <cstdlib>
#include <stdint.h>
#include "rust_abi.h"
#if defined(__APPLE__) || defined(__linux__) || defined(__FreeBSD__)
#define HAVE_DLFCN_H
#include <dlfcn.h>
#elif defined(_WIN32)
// FIXME #2889
#endif
#define END_OF_STACK_RA (void (*)())0xdeadbeef
weak_symbol<uint32_t> abi_version("rust_abi_version");
uint32_t get_abi_version() {
return (*abi_version == NULL) ? 0 : **abi_version;
}
namespace stack_walk {
#ifdef HAVE_DLFCN_H
std::string
frame::symbol() const {
std::stringstream ss;
Dl_info info;
if (!dladdr((void *)ra, &info))
ss << "??";
else
ss << info.dli_sname;
ss << " @ " << std::hex << (uintptr_t)ra;
return ss.str();
}
#else
std::string
frame::symbol() const {
std::stringstream ss;
ss << std::hex << (uintptr_t)ra;
return ss.str();
}
#endif
std::vector<frame>
backtrace() {
std::vector<frame> frames;
// Ideally we would use the current value of EIP here, but there's no
// portable way to get that and there are never any GC roots in our C++
// frames anyhow.
frame f(__builtin_frame_address(0), (void (*)())NULL);
while (f.ra != END_OF_STACK_RA) {
frames.push_back(f);
f.next();
}
return frames;
}
std::string
symbolicate(const std::vector<frame> &frames) {
std::stringstream ss;
std::vector<frame>::const_iterator begin(frames.begin()),
end(frames.end());
while (begin != end) {
ss << begin->symbol() << std::endl;
++begin;
}
return ss.str();
}
} // end namespace stack_walk
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