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//===-- BreakpointResolver.cpp ----------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Breakpoint/BreakpointResolver.h"
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Core/Address.h"
#include "lldb/Breakpoint/Breakpoint.h"
#include "lldb/Breakpoint/BreakpointLocation.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/ModuleList.h"
#include "lldb/Core/SearchFilter.h"
#include "lldb/Core/Stream.h"
#include "lldb/Core/StreamString.h"
#include "lldb/Symbol/SymbolContext.h"
#include "lldb/Target/Target.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/Function.h"
using namespace lldb_private;
using namespace lldb;
//----------------------------------------------------------------------
// BreakpointResolver:
//----------------------------------------------------------------------
BreakpointResolver::BreakpointResolver (Breakpoint *bkpt, const unsigned char resolverTy, lldb::addr_t offset) :
m_breakpoint (bkpt),
m_offset(offset),
SubclassID (resolverTy)
{
}
BreakpointResolver::~BreakpointResolver ()
{
}
void
BreakpointResolver::SetBreakpoint (Breakpoint *bkpt)
{
m_breakpoint = bkpt;
}
void
BreakpointResolver::ResolveBreakpointInModules (SearchFilter &filter, ModuleList &modules)
{
filter.SearchInModuleList(*this, modules);
}
void
BreakpointResolver::ResolveBreakpoint (SearchFilter &filter)
{
filter.Search (*this);
}
void
BreakpointResolver::SetSCMatchesByLine (SearchFilter &filter, SymbolContextList &sc_list, bool skip_prologue, const char *log_ident)
{
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_BREAKPOINTS));
while (sc_list.GetSize() > 0)
{
SymbolContextList tmp_sc_list;
unsigned current_idx = 0;
SymbolContext sc;
bool first_entry = true;
FileSpec match_file_spec;
FileSpec match_original_file_spec;
uint32_t closest_line_number = UINT32_MAX;
// Pull out the first entry, and all the others that match its file spec, and stuff them in the tmp list.
while (current_idx < sc_list.GetSize())
{
bool matches;
sc_list.GetContextAtIndex (current_idx, sc);
if (first_entry)
{
match_file_spec = sc.line_entry.file;
match_original_file_spec = sc.line_entry.original_file;
matches = true;
first_entry = false;
}
else
matches = ((sc.line_entry.file == match_file_spec) ||
(sc.line_entry.original_file == match_original_file_spec));
if (matches)
{
tmp_sc_list.Append (sc);
sc_list.RemoveContextAtIndex(current_idx);
// ResolveSymbolContext will always return a number that is >= the line number you pass in.
// So the smaller line number is always better.
if (sc.line_entry.line < closest_line_number)
closest_line_number = sc.line_entry.line;
}
else
current_idx++;
}
// Okay, we've found the closest line number match, now throw away all the others:
current_idx = 0;
while (current_idx < tmp_sc_list.GetSize())
{
if (tmp_sc_list.GetContextAtIndex(current_idx, sc))
{
if (sc.line_entry.line != closest_line_number)
tmp_sc_list.RemoveContextAtIndex(current_idx);
else
current_idx++;
}
}
// Next go through and see if there are line table entries that are contiguous, and if so keep only the
// first of the contiguous range:
current_idx = 0;
std::map<Block *, lldb::addr_t> blocks_with_breakpoints;
while (current_idx < tmp_sc_list.GetSize())
{
if (tmp_sc_list.GetContextAtIndex(current_idx, sc))
{
if (blocks_with_breakpoints.find (sc.block) != blocks_with_breakpoints.end())
tmp_sc_list.RemoveContextAtIndex(current_idx);
else
{
blocks_with_breakpoints.insert (std::pair<Block *, lldb::addr_t>(sc.block, sc.line_entry.range.GetBaseAddress().GetFileAddress()));
current_idx++;
}
}
}
// and make breakpoints out of the closest line number match.
uint32_t tmp_sc_list_size = tmp_sc_list.GetSize();
for (uint32_t i = 0; i < tmp_sc_list_size; i++)
{
if (tmp_sc_list.GetContextAtIndex(i, sc))
{
Address line_start = sc.line_entry.range.GetBaseAddress();
if (line_start.IsValid())
{
if (filter.AddressPasses(line_start))
{
// If the line number is before the prologue end, move it there...
bool skipped_prologue = false;
if (skip_prologue)
{
if (sc.function)
{
Address prologue_addr(sc.function->GetAddressRange().GetBaseAddress());
if (prologue_addr.IsValid() && (line_start == prologue_addr))
{
const uint32_t prologue_byte_size = sc.function->GetPrologueByteSize();
if (prologue_byte_size)
{
prologue_addr.Slide(prologue_byte_size);
if (filter.AddressPasses(prologue_addr))
{
skipped_prologue = true;
line_start = prologue_addr;
}
}
}
}
}
BreakpointLocationSP bp_loc_sp (AddLocation(line_start));
if (log && bp_loc_sp && !m_breakpoint->IsInternal())
{
StreamString s;
bp_loc_sp->GetDescription (&s, lldb::eDescriptionLevelVerbose);
log->Printf ("Added location (skipped prologue: %s): %s \n", skipped_prologue ? "yes" : "no", s.GetData());
}
}
else if (log)
{
log->Printf ("Breakpoint %s at file address 0x%" PRIx64 " didn't pass the filter.\n",
log_ident ? log_ident : "",
line_start.GetFileAddress());
}
}
else
{
if (log)
log->Printf ("error: Unable to set breakpoint %s at file address 0x%" PRIx64 "\n",
log_ident ? log_ident : "",
line_start.GetFileAddress());
}
}
}
}
}
BreakpointLocationSP
BreakpointResolver::AddLocation(Address loc_addr, bool *new_location)
{
loc_addr.Slide(m_offset);
return m_breakpoint->AddLocation(loc_addr, new_location);
}
void
BreakpointResolver::SetOffset (lldb::addr_t offset)
{
// There may already be an offset, so we are actually adjusting location addresses by the difference.
// lldb::addr_t slide = offset - m_offset;
// FIXME: We should go fix up all the already set locations for the new slide.
m_offset = offset;
}
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