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Implement symbol resolution for non-funct ptr std::function objects

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This commit is contained in:
Christophe Bedard 2019-07-03 13:53:08 +02:00
parent 64cb3a2952
commit f489192a7c
3 changed files with 50 additions and 33 deletions
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37
tracetools/src/utils.cpp
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@ -12,38 +12,37 @@
// See the License for the specific language governing permissions and
// limitations under the License.
#include <iostream>
#if defined(TRACETOOLS_LTTNG_ENABLED) && !defined(_WIN32)
#include <dlfcn.h>
#include <cxxabi.h>
#endif
#include "tracetools/utils.hpp"
const char * get_symbol(void * funptr)
const char * _demangle_symbol(const char * mangled)
{
#define SYMBOL_UNKNOWN "UNKNOWN"
#if defined(TRACETOOLS_LTTNG_ENABLED) && !defined(_WIN32)
#define SYMBOL_LAMBDA "[lambda]"
if (funptr == 0) {
std::cout << "lamba!" << std::endl;
return SYMBOL_LAMBDA;
}
Dl_info info;
if (dladdr(funptr, &info) == 0) {
std::cout << "unknown!" << std::endl;
return SYMBOL_UNKNOWN;
}
char * demangled = nullptr;
int status;
demangled = abi::__cxa_demangle(info.dli_sname, NULL, 0, &status);
demangled = abi::__cxa_demangle(mangled, NULL, 0, &status);
// Use demangled symbol if possible
const char * demangled_val = (status == 0 ? demangled : info.dli_sname);
const char * demangled_val = (status == 0 ? demangled : mangled);
return demangled_val != 0 ? demangled_val : SYMBOL_UNKNOWN;
#else
(void)funptr;
(void)mangled;
return SYMBOL_UNKNOWN;
#endif
}
const char * _get_symbol_funcptr(void * funcptr)
{
#if defined(TRACETOOLS_LTTNG_ENABLED) && !defined(_WIN32)
Dl_info info;
if (dladdr(funcptr, &info) == 0) {
return SYMBOL_UNKNOWN;
}
return _demangle_symbol(info.dli_sname);
#else
(void)funcptr;
return SYMBOL_UNKNOWN;
#endif
}