[sanitizer] Initial implementation of a Hardened Allocator

Summary:
This is an initial implementation of a Hardened Allocator based on Sanitizer Common's CombinedAllocator.
It aims at mitigating heap based vulnerabilities by adding several features to the base allocator, while staying relatively fast.
The following were implemented:
- additional consistency checks on the allocation function parameters and on the heap chunks;
- use of checksum protected chunk header, to detect corruption;
- randomness to the allocator base;
- delayed freelist (quarantine), to mitigate use after free and overall determinism.
Additional mitigations are in the works.

Reviewers: eugenis, aizatsky, pcc, krasin, vitalybuka, glider, dvyukov, kcc

Subscribers: kubabrecka, filcab, llvm-commits

Differential Revision: http://reviews.llvm.org/D20084

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@271968 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 28 insertions, 0 deletions

diff --git a/test/scudo/CMakeLists.txt b/test/scudo/CMakeLists.txt
new file mode 100644
index 000000000..8eae22f3f
--- /dev/null
+++ b/test/scudo/CMakeLists.txt
@@ -0,0 +1,28 @@
+set(SCUDO_LIT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
+set(SCUDO_LIT_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
+
+
+set(SCUDO_TEST_DEPS ${SANITIZER_COMMON_LIT_TEST_DEPS})
+if(NOT COMPILER_RT_STANDALONE_BUILD)
+  list(APPEND SCUDO_TEST_DEPS scudo)
+endif()
+
+configure_lit_site_cfg(
+  ${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.in
+  ${CMAKE_CURRENT_BINARY_DIR}/lit.site.cfg
+  )
+
+if(CMAKE_SYSTEM_NAME MATCHES "Linux")
+   EXEC_PROGRAM(cat ARGS "/proc/cpuinfo" OUTPUT_VARIABLE CPUINFO)
+   STRING(REGEX REPLACE "^.*(sse4_2).*$" "\\1" SSE_THERE ${CPUINFO})
+   STRING(COMPARE EQUAL "sse4_2" "${SSE_THERE}" SSE42_TRUE)
+endif(CMAKE_SYSTEM_NAME MATCHES "Linux")
+
+if (SSE42_TRUE AND CMAKE_SIZEOF_VOID_P EQUAL 8)
+  add_lit_testsuite(check-scudo
+    "Running the Scudo Hardened Allocator tests"
+    ${CMAKE_CURRENT_BINARY_DIR}
+    DEPENDS ${SCUDO_TEST_DEPS})
+  set_target_properties(check-scudo PROPERTIES FOLDER
+    "Scudo Hardened Allocator tests")
+endif(SSE42_TRUE AND CMAKE_SIZEOF_VOID_P EQUAL 8)