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Enable mmap for msan (it's already enabled for asan and tsan)

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PiperOrigin-RevId: 399163710
Change-Id: I2cebb6136adb00a53e4baf18d343cf80191efcb0
This commit is contained in:
Sandboxed API Team 2021-09-27 05:07:48 -07:00 committed by Copybara-Service
parent c29c510e30
commit 448f393c29
1 changed files with 5 additions and 5 deletions
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10
sandboxed_api/sandbox2/policybuilder.cc
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@ -193,6 +193,11 @@ PolicyBuilder& PolicyBuilder::AllowSystemMalloc() {
PolicyBuilder& PolicyBuilder::AllowLlvmSanitizers() { PolicyBuilder& PolicyBuilder::AllowLlvmSanitizers() {
if constexpr (sapi::sanitizers::IsAny()) { if constexpr (sapi::sanitizers::IsAny()) {
// *san use a custom allocator that runs mmap under the hood. For example:
// https://github.com/llvm/llvm-project/blob/596d534ac3524052df210be8d3c01a33b2260a42/compiler-rt/lib/asan/asan_allocator.cpp#L980
// https://github.com/llvm/llvm-project/blob/62ec4ac90738a5f2d209ed28c822223e58aaaeb7/compiler-rt/lib/sanitizer_common/sanitizer_allocator_secondary.h#L98
AllowMmap();
AddPolicyOnSyscall(__NR_madvise, { AddPolicyOnSyscall(__NR_madvise, {
ARG_32(2), ARG_32(2),
JEQ32(MADV_DONTDUMP, ALLOW), JEQ32(MADV_DONTDUMP, ALLOW),
@ -204,13 +209,8 @@ PolicyBuilder& PolicyBuilder::AllowLlvmSanitizers() {
} }
if constexpr (sapi::sanitizers::IsASan()) { if constexpr (sapi::sanitizers::IsASan()) {
AllowSyscall(__NR_sigaltstack); AllowSyscall(__NR_sigaltstack);
// asan uses a custom allocator that runs mmap under the hood. For example:
// https://github.com/llvm/llvm-project/blob/596d534ac3524052df210be8d3c01a33b2260a42/compiler-rt/lib/asan/asan_allocator.cpp#L980
// https://github.com/llvm/llvm-project/blob/62ec4ac90738a5f2d209ed28c822223e58aaaeb7/compiler-rt/lib/sanitizer_common/sanitizer_allocator_secondary.h#L98
AllowMmap();
} }
if constexpr (sapi::sanitizers::IsTSan()) { if constexpr (sapi::sanitizers::IsTSan()) {
AllowMmap();
AllowSyscall(__NR_munmap); AllowSyscall(__NR_munmap);
AddPolicyOnSyscall(__NR_mprotect, AddPolicyOnSyscall(__NR_mprotect,
{ {