bool PystonMemoryManager::finalizeMemory(std::string* ErrMsg) {
// FIXME: Should in-progress permissions be reverted if an error occurs?
llvm_error_code ec;
// Make code memory executable.
// pyston: also make it writeable so we can patch it later
ec = applyMemoryGroupPermissions(CodeMem, sys::Memory::MF_READ | sys::Memory::MF_EXEC | sys::Memory::MF_WRITE);
if (ec) {
if (ErrMsg) {
*ErrMsg = ec.message();
}
RELEASE_ASSERT(0, "finalizeMemory failed");
}
// Make read-only data memory read-only.
ec = applyMemoryGroupPermissions(RODataMem, sys::Memory::MF_READ | sys::Memory::MF_EXEC);
if (ec) {
if (ErrMsg) {
*ErrMsg = ec.message();
}
RELEASE_ASSERT(0, "finalizeMemory failed");
}
// Read-write data memory already has the correct permissions
// Some platforms with separate data cache and instruction cache require
// explicit cache flush, otherwise JIT code manipulations (like resolved
// relocations) will get to the data cache but not to the instruction cache.
invalidateInstructionCache();
return false;
}
bool SectionMemoryManager::applyPermissions(std::string *ErrMsg)
{
// FIXME: Should in-progress permissions be reverted if an error occurs?
error_code ec;
// Make code memory executable.
ec = applyMemoryGroupPermissions(CodeMem,
sys::Memory::MF_READ | sys::Memory::MF_EXEC);
if (ec) {
if (ErrMsg) {
*ErrMsg = ec.message();
}
return true;
}
// Make read-only data memory read-only.
ec = applyMemoryGroupPermissions(RODataMem,
sys::Memory::MF_READ | sys::Memory::MF_EXEC);
if (ec) {
if (ErrMsg) {
*ErrMsg = ec.message();
}
return true;
}
// Read-write data memory already has the correct permissions
return false;
}
bool SectionMemoryManager::applyPermissions(std::string *ErrMsg)
{
// FIXME: Should in-progress permissions be reverted if an error occurs?
error_code ec;
// Make code memory executable.
ec = applyMemoryGroupPermissions(CodeMem,
sys::Memory::MF_READ | sys::Memory::MF_EXEC);
if (ec) {
if (ErrMsg) {
*ErrMsg = ec.message();
}
return true;
}
// Make read-only data memory read-only.
ec = applyMemoryGroupPermissions(RODataMem,
sys::Memory::MF_READ | sys::Memory::MF_EXEC);
if (ec) {
if (ErrMsg) {
*ErrMsg = ec.message();
}
return true;
}
// Read-write data memory already has the correct permissions
// Some platforms with separate data cache and instruction cache require
// explicit cache flush, otherwise JIT code manipulations (like resolved
// relocations) will get to the data cache but not to the instruction cache.
invalidateInstructionCache();
return false;
}
