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Differential D47551 Diff 149366 lldb/trunk/source/Expression/IRMemoryMap.cpp

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lldb/trunk/source/Expression/IRMemoryMap.cpp

Show First 20 Lines • Show All 295 Lines • ▼ Show 20 Lineslldb::addr_t IRMemoryMap::Malloc(size_t size, uint8_t alignment,
lldb_private::Log *log( lldb_private::Log *log(
lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS)); lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
error.Clear(); error.Clear();
lldb::ProcessSP process_sp; lldb::ProcessSP process_sp;
lldb::addr_t allocation_address = LLDB_INVALID_ADDRESS; lldb::addr_t allocation_address = LLDB_INVALID_ADDRESS;
lldb::addr_t aligned_address = LLDB_INVALID_ADDRESS; lldb::addr_t aligned_address = LLDB_INVALID_ADDRESS;
size_t alignment_mask = alignment - 1;
size_t allocation_size; size_t allocation_size;
if (size == 0) if (size == 0) {
// FIXME: Malloc(0) should either return an invalid address or assert, in
// order to cut down on unnecessary allocations.
allocation_size = alignment; allocation_size = alignment;
else } else {
allocation_size = (size & alignment_mask) // Round up the requested size to an aligned value.
? ((size + alignment) & (~alignment_mask)) allocation_size = llvm::alignTo(size, alignment);
: size;
// The process page cache does not see the requested alignment. We can't
// assume its result will be any more than 1-byte aligned. To work around
// this, request `alignment - 1` additional bytes.
allocation_size += alignment - 1;
}
switch (policy) { switch (policy) {
default: default:
error.SetErrorToGenericError(); error.SetErrorToGenericError();
error.SetErrorString("Couldn't malloc: invalid allocation policy"); error.SetErrorString("Couldn't malloc: invalid allocation policy");
return LLDB_INVALID_ADDRESS; return LLDB_INVALID_ADDRESS;
case eAllocationPolicyHostOnly: case eAllocationPolicyHostOnly:
allocation_address = FindSpace(allocation_size); allocation_address = FindSpace(allocation_size);
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