linux-sgx-trts-modified/sdk/gperftools/README

Please, download the latest gperftools code from: https://github.com/gperftools/gperftools
The Intel(R) SGX tcmalloc is based on gperftools-2.5 (the latest version avaialble at the release date).

Do the following to enable tcmalloc in Intel(R) SGX:
1. Copy libsgx_tcmalloc.a to the Intel(R) SGX SDK installation directory.
2. Add "-Wl,--whole-archive -lsgx_tcmalloc -Wl,--no-whole-archive" into enclave linking options in the Makefile.
   For example:
   Enclave_Link_Flags := $(SGX_COMMON_CFLAGS) -Wl,--no-undefined -nostdlib -nodefaultlibs -nostartfiles -L$(SGX_LIBRARY_PATH) \
	-Wl,--whole-archive -l$(Trts_Library_Name) -Wl,--no-whole-archive \
	-Wl,--whole-archive -lsgx_tcmalloc -Wl,--no-whole-archive \
	-Wl,--start-group -lsgx_tstdc -lsgx_tstdcxx -l$(Crypto_Library_Name) -l$(Service_Library_Name) -Wl,--end-group \
	-Wl,-Bstatic -Wl,-Bsymbolic -Wl,--no-undefined \
	-Wl,-pie,-eenclave_entry -Wl,--export-dynamic  \
	-Wl,--defsym,__ImageBase=0 \
	-Wl,--version-script=Enclave/Enclave.lds

   NOTE: The flags "-Wl,--whole-archive -lsgx_tcmalloc -Wl,--no-whole-archive" must be inserted before "-Wl,--start-group -lsgx_tstdc -lsgx_tstdcxx -Wl,--end-group".
         Otherwise, the enclave build will fail.

3. Set the enclave HeapMaxSize equal or larger than 0x900000 in Enclave.config.xml. For example:
   <HeapMaxSize>0x900000</HeapMaxSize>