Dladdr() and the clang importer

nerdsupremacist · March 26, 2020, 11:07am

this worked for me too

nerdsupremacist/Runtime/blob/master/Sources/CSymbols/symbols.c


#ifdef __linux__
#define _GNU_SOURCE
#endif

#include <CSymbols.h>
#include <stddef.h>
#include <dlfcn.h>
#include <stdint.h>

void loadSymbol(const void *address, symbolInfo *symbol) {
    Dl_info info;
    dladdr(address, &info);
    uintptr_t pointerValue = (uintptr_t)info.dli_sname;
    if (info.dli_sname && pointerValue > 0xff) {
        symbol->name = info.dli_sname;
    }
    if (info.dli_saddr) {
        symbol->address = info.dli_saddr;
    }

This file has been truncated. show original

However if you're using dladdr from linux and want to get any results you have to make sure the symbols end up in the dynamic symbols table. You can force it to export all symbols with the -E Linker flag...

So run:
swift build -Xlinker -E -c debug