luo980/cpptrace
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Some more implementation

Browse Source
This commit is contained in:
Jeremy Rifkin 2024-08-16 17:53:04 -05:00
parent d3d697f439
commit 8a805fc829
No known key found for this signature in database
GPG Key ID: 19AA8270105E8EB4
2 changed files with 108 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

95
include/cpptrace/from_current.hpp
View File

@ -1,51 +1,70 @@
#ifndef CPPTRACE_FROM_CURRENT_HPP
#define CPPTRACE_FROM_CURRENT_HPP
#include <cpptrace/cpptrace.hpp>
#include <iostream>
#include <sys/mman.h>
#include <array>
#include <cstring>
#ifdef _MSC_VER
#include <windows.h>
#else
#define CPPTRACE_LIBSTDCPP 0
#define CPPTRACE_LIBCPP 0
#if defined(__GLIBCXX__) || defined(__GLIBCPP__)
#undef CPPTRACE_LIBSTDCPP
#undef CPPTRACE_LIBCPP
#define CPPTRACE_LIBSTDCPP 1
#elif defined(_LIBCPP_VERSION)
#undef CPPTRACE_LIBSTDCPP
#undef CPPTRACE_LIBCPP
#define CPPTRACE_LIBCPP 1
#else
#error "Cpptrace from_current: Unsupported C++ standard library"
#endif
#endif
#include <iostream>
// #if defined(__clang__)
// // pass
// #elif defined(__GNUC__) || defined(__GNUG__)
// // pass
// #elif defined(_MSC_VER)
// // pass
// #else
// #error "Cpptrace from_current: Unsupported C++ compiler"
// #endif
namespace cpptrace {
const raw_trace& raw_trace_from_current_exception();
const stacktrace& from_current_exception();
class unwind_interceptor {
public:
virtual ~unwind_interceptor();
};
namespace detail {
#ifdef _MSC_VER
CPPTRACE_FORCE_NO_INLINE int exception_filter();
#else
class unwind_interceptor {
public:
virtual ~unwind_interceptor();
};
#endif
}
}
/*
CPPTRACE_TRY {
foo();
} CPPTRACE_CATCH(std::runtime_error& e) {
fmt::println("Exception occurred: {}", e.get().what());
fmt::println("{}", cpptrace::from_current_exception());
}
try {
try {
foo();
} catch(const ::cpptrace::unwind_interceptor&) {}
} catch(std::runtime_error& e) {
fmt::println("Exception occurred: {}", e.get().what());
fmt::println("{}", cpptrace::from_current_exception());
}
*/
#define CPPTRACE_TRY \
try { \
try
#define CPPTRACE_CATCH(param) \
catch(cpptrace::unwind_interceptor&) { puts("shouldn't be here"); } \
} catch(param)
#ifdef _MSC_VER
#define CPPTRACE_TRY \
try { \
[&]() { \
__try
#define CPPTRACE_CATCH(param) \
__except(::cpptrace::detail::exception_filter()) { puts("shouldn't be here"); } \
}(); \
} catch(param)
#else
#define CPPTRACE_TRY \
try { \
try
#define CPPTRACE_CATCH(param) \
catch(::cpptrace::detail::unwind_interceptor&) { puts("shouldn't be here"); } \
} catch(param)
#endif
#endif

55
src/cpptrace.cpp
View File

@ -12,6 +12,11 @@
#include <string>
#include <vector>
#ifndef _MSC_VER
#include <array>
#include <sys/mman.h>
#endif
#include "symbols/symbols.hpp"
#include "unwind/unwind.hpp"
#include "demangle/demangle.hpp"
@ -697,10 +702,11 @@ namespace cpptrace {
}
}
unwind_interceptor::~unwind_interceptor() = default;
namespace detail {
inline thread_local lazy_trace_holder current;
thread_local lazy_trace_holder current;
#ifndef _MSC_VER
CPPTRACE_FORCE_NO_INLINE bool foobar(const std::type_info* this_ptr, const std::type_info* t, void**, unsigned) {
std::cout<<"--------UNGABUNGA!!-------- "<<this_ptr->name()<<" "<<t->name()<<std::endl;
@ -708,12 +714,43 @@ namespace cpptrace {
return false;
}
unwind_interceptor::~unwind_interceptor() = default;
std::array<void*, 11> new_vtable;
void clobber_type_info(const std::type_info& info) {
void* type_info_pointer = const_cast<void*>(reinterpret_cast<const void*>(&info));
void* type_info_vtable_pointer = *reinterpret_cast<void**>(type_info_pointer);
type_info_vtable_pointer = reinterpret_cast<void*>(reinterpret_cast<void**>(type_info_vtable_pointer) - 2); // adjust offset
// adjust offset, some info lies before the vtable pointer
// for libstdc++ this looks like
// 0x7ffff7f89d18 <_ZTVN10__cxxabiv117__class_type_infoE>: 0x0000000000000000 0x00007ffff7f89d00
// [offset ][typeinfo pointer ]
// 0x7ffff7f89d28 <_ZTVN10__cxxabiv117__class_type_infoE+16>: 0x00007ffff7dd65a0 0x00007ffff7dd65c0
// [base destructor ][deleting dtor ]
// 0x7ffff7f89d38 <_ZTVN10__cxxabiv117__class_type_infoE+32>: 0x00007ffff7dd8f10 0x00007ffff7dd8f10
// [__is_pointer_p ][__is_function_p ]
// 0x7ffff7f89d48 <_ZTVN10__cxxabiv117__class_type_infoE+48>: 0x00007ffff7dd6640 0x00007ffff7dd6500
// [__do_catch ][__do_upcast ]
// 0x7ffff7f89d58 <_ZTVN10__cxxabiv117__class_type_infoE+64>: 0x00007ffff7dd65e0 0x00007ffff7dd66d0
// [__do_upcast ][__do_dyncast ]
// 0x7ffff7f89d68 <_ZTVN10__cxxabiv117__class_type_infoE+80>: 0x00007ffff7dd6580 0x00007ffff7f8abe8
// [__do_find_public_src][other ]
// In libc++ the layout is
// [offset ][typeinfo pointer ]
// [base destructor ][deleting dtor ]
// [noop1 ][noop2 ]
// [can_catch ][search_above_dst ]
// [search_below_dst ][has_unambiguous_public_base]
// Relevant documentation/implementation:
// https://itanium-cxx-abi.github.io/cxx-abi/abi.html
// libstdc++
// https://github.com/gcc-mirror/gcc/blob/b13e34699c7d27e561fcfe1b66ced1e50e69976f/libstdc%252B%252B-v3/libsupc%252B%252B/typeinfo
// https://github.com/gcc-mirror/gcc/blob/b13e34699c7d27e561fcfe1b66ced1e50e69976f/libstdc%252B%252B-v3/libsupc%252B%252B/class_type_info.cc
// libc++
// https://github.com/llvm/llvm-project/blob/648f4d0658ab00cf1e95330c8811aaea9481a274/libcxx/include/typeinfo
// https://github.com/llvm/llvm-project/blob/648f4d0658ab00cf1e95330c8811aaea9481a274/libcxxabi/src/private_typeinfo.h
//
type_info_vtable_pointer = reinterpret_cast<void*>(reinterpret_cast<void**>(type_info_vtable_pointer) - 2);
memcpy(new_vtable.data(), type_info_vtable_pointer, 11 * sizeof(void*));
new_vtable[6] = reinterpret_cast<void*>(foobar);
@ -745,6 +782,16 @@ namespace cpptrace {
clobber_type_info(typeid(cpptrace::unwind_interceptor));
return 0;
}();
#else
CPPTRACE_FORCE_NO_INLINE int exception_filter() {
std::cout<<"--------UNGABUNGA WINDOWS!!-------- "<<std::endl;
current = lazy_trace_holder(cpptrace::generate_raw_trace(1));
return EXCEPTION_CONTINUE_SEARCH;
}
#endif
}
const raw_trace& raw_trace_from_current_exception() {