ad294e572b
Previously, on GLibc systems, the interceptor was calling __compat_regexec
(regexec@GLIBC_2.2.5) insead of the newer __regexec (regexec@GLIBC_2.3.4).
The __compat_regexec strips the REG_STARTEND flag but does not report an
error if other flags are present. This can result in infinite loops for
programs that use REG_STARTEND to find all matches inside a buffer (since
ignoring REG_STARTEND means that the search always starts from the first
character).
The underlying issue is that GLibc's dlsym(RTLD_NEXT, ...) appears to
always return the oldest versioned symbol instead of the default. This
means it does not match the behaviour of dlsym(RTLD_DEFAULT, ...) or the
behaviour documented in the manpage.
It appears a similar issue was encountered with realpath and worked around
in
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||
|---|---|---|
| .. | ||
| CMakeLists.txt | ||
| README.txt | ||
| memprof.syms.extra | ||
| memprof_allocator.cpp | ||
| memprof_allocator.h | ||
| memprof_descriptions.cpp | ||
| memprof_descriptions.h | ||
| memprof_flags.cpp | ||
| memprof_flags.h | ||
| memprof_flags.inc | ||
| memprof_init_version.h | ||
| memprof_interceptors.cpp | ||
| memprof_interceptors.h | ||
| memprof_interceptors_memintrinsics.cpp | ||
| memprof_interceptors_memintrinsics.h | ||
| memprof_interface_internal.h | ||
| memprof_internal.h | ||
| memprof_linux.cpp | ||
| memprof_malloc_linux.cpp | ||
| memprof_mapping.h | ||
| memprof_new_delete.cpp | ||
| memprof_posix.cpp | ||
| memprof_preinit.cpp | ||
| memprof_rtl.cpp | ||
| memprof_shadow_setup.cpp | ||
| memprof_stack.cpp | ||
| memprof_stack.h | ||
| memprof_stats.cpp | ||
| memprof_stats.h | ||
| memprof_thread.cpp | ||
| memprof_thread.h | ||
| weak_symbols.txt | ||
README.txt
MemProfiling RT
================================
This directory contains sources of the MemProfiling (MemProf) runtime library.
Directory structure:
README.txt : This file.
CMakeLists.txt : File for cmake-based build.
memprof_*.{cc,h} : Sources of the memprof runtime library.
Also MemProf runtime needs the following libraries:
lib/interception/ : Machinery used to intercept function calls.
lib/sanitizer_common/ : Code shared between various sanitizers.
MemProf runtime can only be built by CMake. You can run MemProf tests
from the root of your CMake build tree:
make check-memprof