C++ implementation of the Google logging module
a93a4511ec
Previously we were using a module's "start address", i.e. the address at which the module's executable region was mapped, as the zero virtual address, i.e. the address from which the DSO's virtual addresses are calculated. This works fine for DSOs created by the bfd and gold linkers, which will emit a PT_LOAD directive into the program header which loads the executable region at virtual address (p_vaddr) and file offset (p_offset) 0. However, the lld linker may place a read-only region before the executable region, meaning that both p_vaddr and p_offset for the executable region are non-zero. This means that any symbols resolved by the symbolizer are resolved to an incorrect virtual address. To correctly calculate the address corresponding to virtual address zero, we need to take into account p_vaddr and p_offset. Specifically, the calculation starts with the "base address", i.e. the start address minus the file offset. To get from the base address to virtual address zero, we first add p_offset. This gives us the mapped address of the start of the segment, or in other words the mapped address corresponding to the virtual address of the segment. (Note that this is distinct from the start address, as p_offset is not guaranteed to be page aligned.) We then subtract p_vaddr, which takes us to virtual address zero. |
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| cmake | ||
| doc | ||
| m4 | ||
| packages | ||
| src | ||
| vsprojects | ||
| .gitignore | ||
| aclocal.m4 | ||
| AUTHORS | ||
| ChangeLog | ||
| CMakeLists.txt | ||
| compile | ||
| config.guess | ||
| config.sub | ||
| configure | ||
| configure.ac | ||
| CONTRIBUTING.md | ||
| CONTRIBUTORS | ||
| COPYING | ||
| depcomp | ||
| glog-config.cmake.in | ||
| google-glog.sln | ||
| INSTALL | ||
| install-sh | ||
| libglog.pc.in | ||
| ltmain.sh | ||
| Makefile.am | ||
| Makefile.in | ||
| missing | ||
| mkinstalldirs | ||
| NEWS | ||
| README | ||
| README.windows | ||
| test-driver | ||
This repository contains a C++ implementation of the Google logging module. Documentation for the implementation is in doc/. See INSTALL for (generic) installation instructions for C++: basically ./configure && make && make install