430dc8b6fe
Searching for a range match can cause the search order to not match the sort order, which can cause libbacktrace to miss matching entries. Allocate an extra entry at the end of function_addrs and unit_addrs vectors, so that we can safely compare to the next entry when searching. Adjust the matching code accordingly. Fixes #44 * dwarf.c (function_addrs_search): Compare against the next entry low address, not the high address. (unit_addrs_search): Likewise. (build_address_map): Add a trailing unit_addrs. (read_function_entry): Add a trailing function_addrs. (read_function_info): Likewise. (report_inlined_functions): Search backward for function_addrs match. (dwarf_lookup_pc): Search backward for unit_addrs and function_addrs matches.
libbacktrace
A C library that may be linked into a C/C++ program to produce symbolic backtraces
Initially written by Ian Lance Taylor iant@golang.org.
This is version 1.0. It is likely that this will always be version 1.0.
The libbacktrace library may be linked into a program or library and used to produce symbolic backtraces. Sample uses would be to print a detailed backtrace when an error occurs or to gather detailed profiling information.
The libbacktrace library is provided under a BSD license. See the source files for the exact license text.
The public functions are declared and documented in the header file backtrace.h, which should be #include'd by a user of the library.
Building libbacktrace will generate a file backtrace-supported.h, which a user of the library may use to determine whether backtraces will work. See the source file backtrace-supported.h.in for the macros that it defines.
As of January 2018, libbacktrace only supports ELF, PE/COFF, and XCOFF executables with DWARF debugging information. The library is written to make it straightforward to add support for other object file and debugging formats.
The library relies on the C++ unwind API defined at https://itanium-cxx-abi.github.io/cxx-abi/abi-eh.html This API is provided by GCC.