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70 lines (49 sloc) 1.199 kB
// ABI-specific routines.
#ifndef RUST_ABI_H
#define RUST_ABI_H
#include <cstdlib>
#include <string>
#include <vector>
#include <stdint.h>
#ifdef __WIN32__
#include <windows.h>
#else
#include <dlfcn.h>
#endif
template<typename T>
class weak_symbol {
private:
bool init;
T *data;
const char *name;
void fill() {
if (init)
return;
#ifdef __WIN32__
data = (T *)GetProcAddress(GetModuleHandle(NULL), name);
#else
data = (T *)dlsym(RTLD_DEFAULT, name);
#endif
init = true;
}
public:
weak_symbol(const char *in_name)
: init(false), data(NULL), name(in_name) {}
T *&operator*() { fill(); return data; }
};
namespace stack_walk {
struct frame {
uint8_t *bp; // The frame pointer.
void (*ra)(); // The return address.
frame(void *in_bp, void (*in_ra)()) : bp((uint8_t *)in_bp), ra(in_ra) {}
inline void next() {
ra = *(void (**)())(bp + sizeof(void *));
bp = *(uint8_t **)bp;
}
std::string symbol() const;
};
std::vector<frame> backtrace();
std::string symbolicate(const std::vector<frame> &frames);
} // end namespace stack_walk
uint32_t get_abi_version();
#endif
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