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improved security by encoding NULL values; double free mitigation on by default; more precise free list corruption detection

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This commit is contained in:
daan 2019-11-21 15:21:23 -08:00
parent 1674d551ff
commit 74dbfc30be
6 changed files with 49 additions and 36 deletions
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15
CMakeLists.txt
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@ -7,8 +7,7 @@ set(CMAKE_CXX_STANDARD 17)
option(MI_OVERRIDE "Override the standard malloc interface" ON)
option(MI_INTERPOSE "Use interpose to override standard malloc on macOS" ON)
option(MI_DEBUG_FULL "Use full internal heap invariant checking in DEBUG mode" OFF)
option(MI_SECURE "Use security mitigations (like guard pages, allocation randomization, and free-list corruption detection)" OFF)
option(MI_SECURE_FULL "Use full security mitigations, may be more expensive (includes double-free mitigation)" OFF)
option(MI_SECURE "Use full security mitigations (like guard pages, allocation randomization, double-free mitigation, and free-list corruption detection)" OFF)
option(MI_USE_CXX "Use the C++ compiler to compile the library" OFF)
option(MI_SEE_ASM "Generate assembly files" OFF)
option(MI_LOCAL_DYNAMIC_TLS "Use slightly slower, dlopen-compatible TLS mechanism (Unix)" OFF)
@ -70,15 +69,9 @@ if(MI_OVERRIDE MATCHES "ON")
endif()
endif()
if(MI_SECURE_FULL MATCHES "ON")
message(STATUS "Set full secure build (may be more expensive) (MI_SECURE_FULL=ON)")
if(MI_SECURE MATCHES "ON")
message(STATUS "Set full secure build (MI_SECURE=ON)")
list(APPEND mi_defines MI_SECURE=4)
set(MI_SECURE "ON")
else()
if(MI_SECURE MATCHES "ON")
message(STATUS "Set secure build (MI_SECURE=ON)")
list(APPEND mi_defines MI_SECURE=3)
endif()
endif()
if(MI_SEE_ASM MATCHES "ON")
@ -92,7 +85,7 @@ if(MI_CHECK_FULL MATCHES "ON")
endif()
if(MI_DEBUG_FULL MATCHES "ON")
message(STATUS "Set debug level to full invariant checking (MI_DEBUG_FULL=ON)")
message(STATUS "Set debug level to full internal invariant checking (MI_DEBUG_FULL=ON)")
list(APPEND mi_defines MI_DEBUG=3) # full invariant checking
endif()