184e981111
controlled by the --unwind-on-error flag, and --ignore-breakpoint which separately controls behavior when a called function hits a breakpoint. For breakpoints, we don't unwind, we either stop, or ignore the breakpoint, which makes more sense. Also make both these behaviors globally settable through "settings set". Also handle the case where a breakpoint command calls code that ends up re-hitting the breakpoint. We were recursing and crashing. Now we just stop without calling the second command. <rdar://problem/12986644> <rdar://problem/9119325> llvm-svn: 172503
206 lines
9.5 KiB
C++
206 lines
9.5 KiB
C++
//===-- InferiorCallPOSIX.cpp -----------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "InferiorCallPOSIX.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/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/Process.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Target/ThreadPlanCallFunction.h"
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#include <sys/mman.h>
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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 = process->GetThreadList().GetSelectedThread().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
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= process->GetTarget().GetImages().FindFunctions (ConstString ("mmap"),
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eFunctionNameTypeFull,
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include_symbols,
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include_inlines,
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append,
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sc_list);
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if (count > 0)
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{
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SymbolContext sc;
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if (sc_list.GetContextAtIndex(0, sc))
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{
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const uint32_t range_scope = eSymbolContextFunction | eSymbolContextSymbol;
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const bool use_inline_block_range = false;
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const bool stop_other_threads = true;
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const bool unwind_on_error = true;
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const bool ignore_breakpoints = true;
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const bool try_all_threads = true;
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const uint32_t timeout_usec = 500000;
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addr_t prot_arg, flags_arg = 0;
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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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if (flags & eMmapFlagsPrivate)
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flags_arg |= MAP_PRIVATE;
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if (flags & eMmapFlagsAnon)
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flags_arg |= MAP_ANON;
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AddressRange mmap_range;
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if (sc.GetAddressRange(range_scope, 0, use_inline_block_range, mmap_range))
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{
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ClangASTContext *clang_ast_context = process->GetTarget().GetScratchClangASTContext();
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lldb::clang_type_t clang_void_ptr_type = clang_ast_context->GetVoidPtrType(false);
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ThreadPlanCallFunction *call_function_thread_plan
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= new ThreadPlanCallFunction (*thread,
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mmap_range.GetBaseAddress(),
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ClangASTType (clang_ast_context->getASTContext(), clang_void_ptr_type),
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stop_other_threads,
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unwind_on_error,
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ignore_breakpoints,
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&addr,
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&length,
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&prot_arg,
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&flags_arg,
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&fd,
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&offset);
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lldb::ThreadPlanSP call_plan_sp (call_function_thread_plan);
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if (call_plan_sp)
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{
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StreamFile error_strm;
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// This plan is a utility plan, so set it to discard itself when done.
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call_plan_sp->SetIsMasterPlan (true);
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call_plan_sp->SetOkayToDiscard(true);
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StackFrame *frame = thread->GetStackFrameAtIndex (0).get();
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if (frame)
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{
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ExecutionContext exe_ctx;
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frame->CalculateExecutionContext (exe_ctx);
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ExecutionResults result = process->RunThreadPlan (exe_ctx,
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call_plan_sp,
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stop_other_threads,
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try_all_threads,
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unwind_on_error,
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ignore_breakpoints,
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timeout_usec,
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error_strm);
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if (result == eExecutionCompleted)
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{
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allocated_addr = call_plan_sp->GetReturnValueObject()->GetValueAsUnsigned(LLDB_INVALID_ADDRESS);
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if (process->GetAddressByteSize() == 4)
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{
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if (allocated_addr == UINT32_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 = process->GetThreadList().GetSelectedThread().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
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= process->GetTarget().GetImages().FindFunctions (ConstString ("munmap"),
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eFunctionNameTypeFull,
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include_symbols,
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include_inlines,
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append,
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sc_list);
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if (count > 0)
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{
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SymbolContext sc;
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if (sc_list.GetContextAtIndex(0, sc))
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{
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const uint32_t range_scope = eSymbolContextFunction | eSymbolContextSymbol;
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const bool use_inline_block_range = false;
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const bool stop_other_threads = true;
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const bool unwind_on_error = true;
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const bool ignore_breakpoints = true;
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const bool try_all_threads = true;
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const uint32_t timeout_usec = 500000;
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AddressRange munmap_range;
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if (sc.GetAddressRange(range_scope, 0, use_inline_block_range, munmap_range))
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{
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lldb::ThreadPlanSP call_plan_sp (new ThreadPlanCallFunction (*thread,
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munmap_range.GetBaseAddress(),
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ClangASTType(),
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stop_other_threads,
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unwind_on_error,
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ignore_breakpoints,
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&addr,
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&length));
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if (call_plan_sp)
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{
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StreamFile error_strm;
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// This plan is a utility plan, so set it to discard itself when done.
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call_plan_sp->SetIsMasterPlan (true);
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call_plan_sp->SetOkayToDiscard(true);
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StackFrame *frame = thread->GetStackFrameAtIndex (0).get();
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if (frame)
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{
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ExecutionContext exe_ctx;
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frame->CalculateExecutionContext (exe_ctx);
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ExecutionResults result = process->RunThreadPlan (exe_ctx,
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call_plan_sp,
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stop_other_threads,
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try_all_threads,
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unwind_on_error,
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ignore_breakpoints,
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timeout_usec,
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error_strm);
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if (result == eExecutionCompleted)
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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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