4c03ea14f2
Since these timeouts guard against catastrophic error in debugserver, I also increased all of them to the maximum value among them. The motivation for this test was the observation that an asanified LLDB would often exhibit seemingly random test failures that could be traced back to debugserver packets getting out of sync. With this path applied I can no longer reproduce the one particular failure mode that I was investigating. rdar://problem/49441261 Differential Revision: https://reviews.llvm.org/D60340 llvm-svn: 357829
238 lines
8.3 KiB
C++
238 lines
8.3 KiB
C++
//===-- InferiorCallPOSIX.cpp -----------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "InferiorCallPOSIX.h"
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#include "lldb/Core/Address.h"
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#include "lldb/Core/StreamFile.h"
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#include "lldb/Core/ValueObject.h"
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#include "lldb/Expression/DiagnosticManager.h"
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#include "lldb/Host/Config.h"
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#include "lldb/Symbol/ClangASTContext.h"
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#include "lldb/Symbol/SymbolContext.h"
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#include "lldb/Target/ExecutionContext.h"
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#include "lldb/Target/Platform.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Target/ThreadPlanCallFunction.h"
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#ifndef LLDB_DISABLE_POSIX
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#include <sys/mman.h>
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#else
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// define them
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#define PROT_NONE 0
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#define PROT_READ 1
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#define PROT_WRITE 2
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#define PROT_EXEC 4
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#endif
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using namespace lldb;
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using namespace lldb_private;
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bool lldb_private::InferiorCallMmap(Process *process, addr_t &allocated_addr,
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addr_t addr, addr_t length, unsigned prot,
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unsigned flags, addr_t fd, addr_t offset) {
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Thread *thread =
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process->GetThreadList().GetExpressionExecutionThread().get();
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if (thread == NULL)
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return false;
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const bool append = true;
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const bool include_symbols = true;
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const bool include_inlines = false;
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SymbolContextList sc_list;
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const uint32_t count = process->GetTarget().GetImages().FindFunctions(
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ConstString("mmap"), eFunctionNameTypeFull, include_symbols,
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include_inlines, append, sc_list);
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if (count > 0) {
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SymbolContext sc;
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if (sc_list.GetContextAtIndex(0, sc)) {
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const uint32_t range_scope =
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eSymbolContextFunction | eSymbolContextSymbol;
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const bool use_inline_block_range = false;
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EvaluateExpressionOptions options;
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options.SetStopOthers(true);
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options.SetUnwindOnError(true);
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options.SetIgnoreBreakpoints(true);
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options.SetTryAllThreads(true);
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options.SetDebug(false);
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options.SetTimeout(process->GetUtilityExpressionTimeout());
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options.SetTrapExceptions(false);
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addr_t prot_arg;
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if (prot == eMmapProtNone)
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prot_arg = PROT_NONE;
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else {
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prot_arg = 0;
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if (prot & eMmapProtExec)
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prot_arg |= PROT_EXEC;
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if (prot & eMmapProtRead)
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prot_arg |= PROT_READ;
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if (prot & eMmapProtWrite)
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prot_arg |= PROT_WRITE;
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}
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AddressRange mmap_range;
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if (sc.GetAddressRange(range_scope, 0, use_inline_block_range,
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mmap_range)) {
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ClangASTContext *clang_ast_context =
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process->GetTarget().GetScratchClangASTContext();
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CompilerType clang_void_ptr_type =
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clang_ast_context->GetBasicType(eBasicTypeVoid).GetPointerType();
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const ArchSpec arch = process->GetTarget().GetArchitecture();
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MmapArgList args =
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process->GetTarget().GetPlatform()->GetMmapArgumentList(
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arch, addr, length, prot_arg, flags, fd, offset);
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lldb::ThreadPlanSP call_plan_sp(
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new ThreadPlanCallFunction(*thread, mmap_range.GetBaseAddress(),
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clang_void_ptr_type, args, options));
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if (call_plan_sp) {
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DiagnosticManager diagnostics;
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StackFrame *frame = thread->GetStackFrameAtIndex(0).get();
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if (frame) {
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ExecutionContext exe_ctx;
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frame->CalculateExecutionContext(exe_ctx);
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ExpressionResults result = process->RunThreadPlan(
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exe_ctx, call_plan_sp, options, diagnostics);
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if (result == eExpressionCompleted) {
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allocated_addr =
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call_plan_sp->GetReturnValueObject()->GetValueAsUnsigned(
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LLDB_INVALID_ADDRESS);
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if (process->GetAddressByteSize() == 4) {
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if (allocated_addr == UINT32_MAX)
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return false;
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} else if (process->GetAddressByteSize() == 8) {
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if (allocated_addr == UINT64_MAX)
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return false;
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}
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return true;
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}
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}
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}
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}
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}
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}
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return false;
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}
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bool lldb_private::InferiorCallMunmap(Process *process, addr_t addr,
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addr_t length) {
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Thread *thread =
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process->GetThreadList().GetExpressionExecutionThread().get();
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if (thread == NULL)
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return false;
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const bool append = true;
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const bool include_symbols = true;
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const bool include_inlines = false;
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SymbolContextList sc_list;
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const uint32_t count = process->GetTarget().GetImages().FindFunctions(
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ConstString("munmap"), eFunctionNameTypeFull, include_symbols,
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include_inlines, append, sc_list);
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if (count > 0) {
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SymbolContext sc;
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if (sc_list.GetContextAtIndex(0, sc)) {
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const uint32_t range_scope =
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eSymbolContextFunction | eSymbolContextSymbol;
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const bool use_inline_block_range = false;
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EvaluateExpressionOptions options;
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options.SetStopOthers(true);
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options.SetUnwindOnError(true);
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options.SetIgnoreBreakpoints(true);
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options.SetTryAllThreads(true);
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options.SetDebug(false);
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options.SetTimeout(process->GetUtilityExpressionTimeout());
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options.SetTrapExceptions(false);
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AddressRange munmap_range;
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if (sc.GetAddressRange(range_scope, 0, use_inline_block_range,
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munmap_range)) {
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lldb::addr_t args[] = {addr, length};
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lldb::ThreadPlanSP call_plan_sp(
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new ThreadPlanCallFunction(*thread, munmap_range.GetBaseAddress(),
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CompilerType(), args, options));
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if (call_plan_sp) {
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DiagnosticManager diagnostics;
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StackFrame *frame = thread->GetStackFrameAtIndex(0).get();
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if (frame) {
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ExecutionContext exe_ctx;
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frame->CalculateExecutionContext(exe_ctx);
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ExpressionResults result = process->RunThreadPlan(
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exe_ctx, call_plan_sp, options, diagnostics);
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if (result == eExpressionCompleted) {
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return true;
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}
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}
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}
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}
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}
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}
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return false;
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}
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// FIXME: This has nothing to do with Posix, it is just a convenience function
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// that calls a
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// function of the form "void * (*)(void)". We should find a better place to
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// put this.
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bool lldb_private::InferiorCall(Process *process, const Address *address,
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addr_t &returned_func, bool trap_exceptions) {
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Thread *thread =
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process->GetThreadList().GetExpressionExecutionThread().get();
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if (thread == NULL || address == NULL)
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return false;
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EvaluateExpressionOptions options;
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options.SetStopOthers(true);
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options.SetUnwindOnError(true);
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options.SetIgnoreBreakpoints(true);
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options.SetTryAllThreads(true);
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options.SetDebug(false);
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options.SetTimeout(process->GetUtilityExpressionTimeout());
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options.SetTrapExceptions(trap_exceptions);
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ClangASTContext *clang_ast_context =
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process->GetTarget().GetScratchClangASTContext();
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CompilerType clang_void_ptr_type =
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clang_ast_context->GetBasicType(eBasicTypeVoid).GetPointerType();
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lldb::ThreadPlanSP call_plan_sp(
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new ThreadPlanCallFunction(*thread, *address, clang_void_ptr_type,
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llvm::ArrayRef<addr_t>(), options));
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if (call_plan_sp) {
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DiagnosticManager diagnostics;
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StackFrame *frame = thread->GetStackFrameAtIndex(0).get();
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if (frame) {
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ExecutionContext exe_ctx;
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frame->CalculateExecutionContext(exe_ctx);
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ExpressionResults result =
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process->RunThreadPlan(exe_ctx, call_plan_sp, options, diagnostics);
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if (result == eExpressionCompleted) {
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returned_func =
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call_plan_sp->GetReturnValueObject()->GetValueAsUnsigned(
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LLDB_INVALID_ADDRESS);
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if (process->GetAddressByteSize() == 4) {
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if (returned_func == UINT32_MAX)
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return false;
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} else if (process->GetAddressByteSize() == 8) {
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if (returned_func == UINT64_MAX)
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return false;
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}
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return true;
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}
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}
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}
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return false;
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}
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