1 files changed, 190 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Plugins/Process/Utility/InferiorCallPOSIX.cpp b/contrib/llvm-project/lldb/source/Plugins/Process/Utility/InferiorCallPOSIX.cpp
new file mode 100644
index 000000000000..32c71d87c7f5
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Plugins/Process/Utility/InferiorCallPOSIX.cpp
@@ -0,0 +1,190 @@
+//===-- InferiorCallPOSIX.cpp ---------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "InferiorCallPOSIX.h"
+#include "lldb/Core/Address.h"
+#include "lldb/Core/Module.h"
+#include "lldb/Core/ValueObject.h"
+#include "lldb/Expression/DiagnosticManager.h"
+#include "lldb/Host/Config.h"
+#include "lldb/Symbol/SymbolContext.h"
+#include "lldb/Symbol/TypeSystem.h"
+#include "lldb/Target/ExecutionContext.h"
+#include "lldb/Target/Platform.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Target/ThreadPlanCallFunction.h"
+
+#if LLDB_ENABLE_POSIX
+#include <sys/mman.h>
+#else
+// define them
+#define PROT_NONE 0
+#define PROT_READ 1
+#define PROT_WRITE 2
+#define PROT_EXEC 4
+#endif
+
+using namespace lldb;
+using namespace lldb_private;
+
+bool lldb_private::InferiorCallMmap(Process *process, addr_t &allocated_addr,
+                                    addr_t addr, addr_t length, unsigned prot,
+                                    unsigned flags, addr_t fd, addr_t offset) {
+  Thread *thread =
+      process->GetThreadList().GetExpressionExecutionThread().get();
+  if (thread == nullptr)
+    return false;
+
+  ModuleFunctionSearchOptions function_options;
+  function_options.include_symbols = true;
+  function_options.include_inlines = false;
+
+  SymbolContextList sc_list;
+  process->GetTarget().GetImages().FindFunctions(
+      ConstString("mmap"), eFunctionNameTypeFull, function_options, sc_list);
+  const uint32_t count = sc_list.GetSize();
+  if (count > 0) {
+    SymbolContext sc;
+    if (sc_list.GetContextAtIndex(0, sc)) {
+      const uint32_t range_scope =
+          eSymbolContextFunction | eSymbolContextSymbol;
+      const bool use_inline_block_range = false;
+      EvaluateExpressionOptions options;
+      options.SetStopOthers(true);
+      options.SetUnwindOnError(true);
+      options.SetIgnoreBreakpoints(true);
+      options.SetTryAllThreads(true);
+      options.SetDebug(false);
+      options.SetTimeout(process->GetUtilityExpressionTimeout());
+      options.SetTrapExceptions(false);
+
+      addr_t prot_arg;
+      if (prot == eMmapProtNone)
+        prot_arg = PROT_NONE;
+      else {
+        prot_arg = 0;
+        if (prot & eMmapProtExec)
+          prot_arg |= PROT_EXEC;
+        if (prot & eMmapProtRead)
+          prot_arg |= PROT_READ;
+        if (prot & eMmapProtWrite)
+          prot_arg |= PROT_WRITE;
+      }
+
+      AddressRange mmap_range;
+      if (sc.GetAddressRange(range_scope, 0, use_inline_block_range,
+                             mmap_range)) {
+        auto type_system_or_err =
+            process->GetTarget().GetScratchTypeSystemForLanguage(
+                eLanguageTypeC);
+        if (!type_system_or_err) {
+          llvm::consumeError(type_system_or_err.takeError());
+          return false;
+        }
+        auto ts = *type_system_or_err;
+        if (!ts)
+          return false;
+        CompilerType void_ptr_type =
+            ts->GetBasicTypeFromAST(eBasicTypeVoid).GetPointerType();
+        const ArchSpec arch = process->GetTarget().GetArchitecture();
+        MmapArgList args =
+            process->GetTarget().GetPlatform()->GetMmapArgumentList(
+                arch, addr, length, prot_arg, flags, fd, offset);
+        lldb::ThreadPlanSP call_plan_sp(
+            new ThreadPlanCallFunction(*thread, mmap_range.GetBaseAddress(),
+                                       void_ptr_type, args, options));
+        if (call_plan_sp) {
+          DiagnosticManager diagnostics;
+
+          StackFrame *frame = thread->GetStackFrameAtIndex(0).get();
+          if (frame) {
+            ExecutionContext exe_ctx;
+            frame->CalculateExecutionContext(exe_ctx);
+            ExpressionResults result = process->RunThreadPlan(
+                exe_ctx, call_plan_sp, options, diagnostics);
+            if (result == eExpressionCompleted) {
+
+              allocated_addr =
+                  call_plan_sp->GetReturnValueObject()->GetValueAsUnsigned(
+                      LLDB_INVALID_ADDRESS);
+              if (process->GetAddressByteSize() == 4) {
+                if (allocated_addr == UINT32_MAX)
+                  return false;
+              } else if (process->GetAddressByteSize() == 8) {
+                if (allocated_addr == UINT64_MAX)
+                  return false;
+              }
+              return true;
+            }
+          }
+        }
+      }
+    }
+  }
+
+  return false;
+}
+
+bool lldb_private::InferiorCallMunmap(Process *process, addr_t addr,
+                                      addr_t length) {
+  Thread *thread =
+      process->GetThreadList().GetExpressionExecutionThread().get();
+  if (thread == nullptr)
+    return false;
+
+  ModuleFunctionSearchOptions function_options;
+  function_options.include_symbols = true;
+  function_options.include_inlines = false;
+
+  SymbolContextList sc_list;
+  process->GetTarget().GetImages().FindFunctions(
+      ConstString("munmap"), eFunctionNameTypeFull, function_options, sc_list);
+  const uint32_t count = sc_list.GetSize();
+  if (count > 0) {
+    SymbolContext sc;
+    if (sc_list.GetContextAtIndex(0, sc)) {
+      const uint32_t range_scope =
+          eSymbolContextFunction | eSymbolContextSymbol;
+      const bool use_inline_block_range = false;
+      EvaluateExpressionOptions options;
+      options.SetStopOthers(true);
+      options.SetUnwindOnError(true);
+      options.SetIgnoreBreakpoints(true);
+      options.SetTryAllThreads(true);
+      options.SetDebug(false);
+      options.SetTimeout(process->GetUtilityExpressionTimeout());
+      options.SetTrapExceptions(false);
+
+      AddressRange munmap_range;
+      if (sc.GetAddressRange(range_scope, 0, use_inline_block_range,
+                             munmap_range)) {
+        lldb::addr_t args[] = {addr, length};
+        lldb::ThreadPlanSP call_plan_sp(
+            new ThreadPlanCallFunction(*thread, munmap_range.GetBaseAddress(),
+                                       CompilerType(), args, options));
+        if (call_plan_sp) {
+          DiagnosticManager diagnostics;
+
+          StackFrame *frame = thread->GetStackFrameAtIndex(0).get();
+          if (frame) {
+            ExecutionContext exe_ctx;
+            frame->CalculateExecutionContext(exe_ctx);
+            ExpressionResults result = process->RunThreadPlan(
+                exe_ctx, call_plan_sp, options, diagnostics);
+            if (result == eExpressionCompleted) {
+              return true;
+            }
+          }
+        }
+      }
+    }
+  }
+
+  return false;
+}