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