9be8f8b34d
GetTls is the range of
* thread control block and optional TLS_PRE_TCB_SIZE
* static TLS blocks plus static TLS surplus
On glibc, lsan requires the range to include
`pthread::{specific_1stblock,specific}` so that allocations only referenced by
`pthread_setspecific` can be scanned.
This patch uses `dl_iterate_phdr` to collect TLS ranges. Find the one
with `dlpi_tls_modid==1` as one of the initially loaded module, then find
consecutive ranges. The boundaries give us addr and size.
This allows us to drop the glibc internal `_dl_get_tls_static_info` and
`InitTlsSize` entirely. Use the simplified method with non-Android Linux for
now, but in theory this can be used with *BSD and potentially other ELF OSes.
In the future, we can move `ThreadDescriptorSize` code to lsan (and consider
intercepting `pthread_setspecific`) to avoid hacks in generic code.
See https://reviews.llvm.org/D93972#2480556 for analysis on GetTls usage
across various sanitizers.
Differential Revision: https://reviews.llvm.org/D98926
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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