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//===-- InferiorCallPOSIX.cpp -----------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "InferiorCallPOSIX.h"
#include "lldb/Core/Address.h"
#include "lldb/Core/StreamFile.h"
#include "lldb/Core/ValueObject.h"
#include "lldb/Expression/DiagnosticManager.h"
#include "lldb/Host/Config.h"
#include "lldb/Symbol/ClangASTContext.h"
#include "lldb/Symbol/SymbolContext.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"
#ifndef LLDB_DISABLE_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 == NULL)
return false;
const bool append = true;
const bool include_symbols = true;
const bool include_inlines = false;
SymbolContextList sc_list;
const uint32_t count = process->GetTarget().GetImages().FindFunctions(
ConstString("mmap"), eFunctionNameTypeFull, include_symbols,
include_inlines, append, sc_list);
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(std::chrono::milliseconds(500));
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)) {
ClangASTContext *clang_ast_context =
process->GetTarget().GetScratchClangASTContext();
CompilerType clang_void_ptr_type =
clang_ast_context->GetBasicType(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(),
clang_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 == NULL)
return false;
const bool append = true;
const bool include_symbols = true;
const bool include_inlines = false;
SymbolContextList sc_list;
const uint32_t count = process->GetTarget().GetImages().FindFunctions(
ConstString("munmap"), eFunctionNameTypeFull, include_symbols,
include_inlines, append, sc_list);
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(std::chrono::milliseconds(500));
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;
}
// FIXME: This has nothing to do with Posix, it is just a convenience function
// that calls a
// function of the form "void * (*)(void)". We should find a better place to
// put this.
bool lldb_private::InferiorCall(Process *process, const Address *address,
addr_t &returned_func, bool trap_exceptions) {
Thread *thread =
process->GetThreadList().GetExpressionExecutionThread().get();
if (thread == NULL || address == NULL)
return false;
EvaluateExpressionOptions options;
options.SetStopOthers(true);
options.SetUnwindOnError(true);
options.SetIgnoreBreakpoints(true);
options.SetTryAllThreads(true);
options.SetDebug(false);
options.SetTimeout(std::chrono::milliseconds(500));
options.SetTrapExceptions(trap_exceptions);
ClangASTContext *clang_ast_context =
process->GetTarget().GetScratchClangASTContext();
CompilerType clang_void_ptr_type =
clang_ast_context->GetBasicType(eBasicTypeVoid).GetPointerType();
lldb::ThreadPlanSP call_plan_sp(
new ThreadPlanCallFunction(*thread, *address, clang_void_ptr_type,
llvm::ArrayRef<addr_t>(), 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) {
returned_func =
call_plan_sp->GetReturnValueObject()->GetValueAsUnsigned(
LLDB_INVALID_ADDRESS);
if (process->GetAddressByteSize() == 4) {
if (returned_func == UINT32_MAX)
return false;
} else if (process->GetAddressByteSize() == 8) {
if (returned_func == UINT64_MAX)
return false;
}
return true;
}
}
}
return false;
}
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