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Neutrialize thinlto's memcpy libcall gen.

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Amos Bird 2020-10-02 01:19:05 +08:00
parent aa43e3d5db
commit 8ffa4d395c
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GPG Key ID: 80D430DCBECFEDB4
3 changed files with 11 additions and 2 deletions
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7
CMakeLists.txt
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@ -513,7 +513,12 @@ endif ()
macro (add_executable target)
# invoke built-in add_executable
# explicitly acquire and interpose malloc symbols by clickhouse_malloc
_add_executable (${ARGV} $<TARGET_OBJECTS:clickhouse_malloc>)
# if GLIBC_COMPATIBILITY is ON, also provide memcpy symbol explicitly to neutrialize thinlto's libcall generation.
if (GLIBC_COMPATIBILITY)
_add_executable (${ARGV} $<TARGET_OBJECTS:clickhouse_malloc> $<TARGET_OBJECTS:clickhouse_memcpy>)
else (GLIBC_COMPATIBILITY)
_add_executable (${ARGV} $<TARGET_OBJECTS:clickhouse_malloc>)
endif ()
get_target_property (type ${target} TYPE)
if (${type} STREQUAL EXECUTABLE)
# operator::new/delete for executables (MemoryTracker stuff)

4
base/glibc-compatibility/CMakeLists.txt
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@ -27,6 +27,10 @@ if (GLIBC_COMPATIBILITY)
list(APPEND glibc_compatibility_sources musl/getentropy.c)
endif()
add_library (clickhouse_memcpy OBJECT
${ClickHouse_SOURCE_DIR}/contrib/FastMemcpy/memcpy_wrapper.c
)
# Need to omit frame pointers to match the performance of glibc
set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fomit-frame-pointer")

2
contrib/FastMemcpy/memcpy_wrapper.c
View File

@ -1,4 +1,4 @@
#include <FastMemcpy.h>
#include "FastMemcpy.h"
void * memcpy(void * __restrict destination, const void * __restrict source, size_t size)
{