tcmalloc linking errors (undefined references to __cxa_throw_bad_array_new_length and operator delete(void*, unsigned long))

Hi,

I am building a simple application that utilizes tcmalloc for sgx.
My operating system is *Ubuntu 18.04.1 LTS* and I am compiling sdk (with tag sgx_1.8) successfully. (I had to include `` in `setjmp/siglongjmp.c` as described here https://github.com/intel/linux-sgx/issues/160 and also ignore some warning flags).

I am getting this linker errors for undefined delete operator and __cxa_throw_bad_array_new_length. (see below)

```
./Enclave/gperftools/gperftools-2.5/src/symbolize.o: In function `_GLOBAL__sub_I_symbolize.cc':
symbolize.cc:(.text.startup+0x105): undefined reference to `operator delete(void*, unsigned long)'
./Enclave/gperftools/gperftools-2.5/src/malloc_extension.o: In function `MallocExtension_ocall::~MallocExtension_ocall()':
malloc_extension.cc:(.text+0x146): undefined reference to `operator delete(void*, unsigned long)'
./Enclave/gperftools/gperftools-2.5/src/malloc_extension.o: In function `SysAllocator_ocall::~SysAllocator_ocall()':
malloc_extension.cc:(.text+0x216): undefined reference to `operator delete(void*, unsigned long)'
./Enclave/gperftools/gperftools-2.5/src/tcmalloc.o: In function `TCMallocImplementation_ocall::ReadHeapGrowthStackTraces()':
tcmalloc.cc:(.text._ZN28TCMallocImplementation_ocall25ReadHeapGrowthStackTracesEv[_ZN28TCMallocImplementation_ocall25ReadHeapGrowthStackTracesEv]+0x2a0): undefined reference to `__cxa_throw_bad_array_new_length'
./Enclave/gperftools/gperftools-2.5/src/tcmalloc.o: In function `TCMallocImplementation_ocall::~TCMallocImplementation_ocall()':
tcmalloc.cc:(.text._ZN28TCMallocImplementation_ocallD0Ev[_ZN28TCMallocImplementation_ocallD5Ev]+0x1d): undefined reference to `operator delete(void*, unsigned long)'
/home/dimitra/workspace/sgx-software/linux-sgx/linux/installer/bin/sgxsdk/lib64/libsgx_tcmalloc.a(libtcmalloc_minimal_la-tcmalloc.o): In function `DumpHeapGrowthStackTraces':
/home/dimitra/workspace/sgx-software/linux-sgx/sdk/gperftools/gperftools-2.5/src/tcmalloc.cc:506: undefined reference to `__cxa_throw_bad_array_new_length'
/home/dimitra/workspace/sgx-software/linux-sgx/linux/installer/bin/sgxsdk/lib64/libsgx_tcmalloc.a(libtcmalloc_minimal_la-tcmalloc.o): In function `TCMallocImplementation::~TCMallocImplementation()':
/home/dimitra/workspace/sgx-software/linux-sgx/sdk/gperftools/gperftools-2.5/src/tcmalloc.cc:567: undefined reference to `operator delete(void*, unsigned long)'
/home/dimitra/workspace/sgx-software/linux-sgx/linux/installer/bin/sgxsdk/lib64/libsgx_tcmalloc.a(libtcmalloc_minimal_internal_la-malloc_extension.o): In function `MallocExtension::~MallocExtension()':
/home/dimitra/workspace/sgx-software/linux-sgx/sdk/gperftools/gperftools-2.5/src/malloc_extension.cc:115: undefined reference to `operator delete(void*, unsigned long)'
/home/dimitra/workspace/sgx-software/linux-sgx/linux/installer/bin/sgxsdk/lib64/libsgx_tcmalloc.a(libtcmalloc_minimal_internal_la-malloc_extension.o): In function `SysAllocator::~SysAllocator()':
/home/dimitra/workspace/sgx-software/linux-sgx/sdk/gperftools/gperftools-2.5/src/malloc_extension.cc:112: undefined reference to `operator delete(void*, unsigned long)'
/home/dimitra/workspace/sgx-software/linux-sgx/linux/installer/bin/sgxsdk/lib64/libsgx_tcmalloc.a(libtcmalloc_minimal_internal_la-system-alloc.o): In function `DefaultSysAllocator::~DefaultSysAllocator()':
/home/dimitra/workspace/sgx-software/linux-sgx/sdk/gperftools/gperftools-2.5/src/system-alloc.cc:176: undefined reference to `operator delete(void*, unsigned long)'
/home/dimitra/workspace/sgx-software/linux-sgx/linux/installer/bin/sgxsdk/lib64/libsgx_tcmalloc.a(libtcmalloc_minimal_internal_la-system-alloc.o): In function `DevMemSysAllocator::~DevMemSysAllocator()':
/home/dimitra/workspace/sgx-software/linux-sgx/sdk/gperftools/gperftools-2.5/src/system-alloc.cc:169: undefined reference to `operator delete(void*, unsigned long)'
/home/dimitra/workspace/sgx-software/linux-sgx/linux/installer/bin/sgxsdk/lib64/libsgx_tcmalloc.a(libtcmalloc_minimal_internal_la-system-alloc.o):/home/dimitra/workspace/sgx-software/linux-sgx/sdk/gperftools/gperftools-2.5/src/system-alloc.cc:156: more undefined references to `operator delete(void*, unsigned long)' follow
./Enclave/gperftools/gperftools-2.5/src/stack_trace_table.o: In function `tcmalloc_ocall::StackTraceTable::ReadStackTracesAndClear()':
stack_trace_table.cc:(.text+0x592): undefined reference to `__cxa_throw_bad_array_new_length'
./Enclave/gperftools/gperftools-2.5/src/static_vars.o: In function `tcmalloc_ocall::Static::InitStaticVars()':
static_vars.cc:(.text+0x3ca): undefined reference to `operator delete(void*, unsigned long)'
collect2: error: ld returned 1 exit status
Makefile:316: recipe for target 'libenclave.so' failed
make: *** [libenclave.so] Error 1
```

I also get same errors when using the precompiled tcmalloc library from here https://01.org/intel-softwareguard-extensions/downloads/intel-sgx-linux-1.8-release.

Any idea why I am getting this error?

P.S. new and delete operators are defined in the same file (gperftools-2.5/src/libc_override_redefine.h) -- I cannot understand why the linker is complaining (let alone why it is only complaining about delete and not new operator).

Thanks,
-Dimitra

Start with the Makefile target for libenclave.so and the linker inputs, then inspect gperftools-2.5/src/libc_override_redefine.h alongside the reported tcmalloc, malloc_extension, system-alloc, and stack_trace_table sources. Compare the build with the precompiled tcmalloc library and verify that linking completes without the reported undefined references.

Written by the indexing model from the issue text.