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vectors: attempt to identify instances of virtual classes 

Also:
- don't restrict to heap ranges (e.g. allow globals)
- stylistic cleanup
develop
lethosor 2016-04-03 20:47:21 -04:00
parent 37c81df21c
commit f5d10ecf61
1 changed files with 44 additions and 35 deletions
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79
plugins/devel/vectors.cpp
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@ -1,18 +1,20 @@
// Lists embeded STL vectors and pointers to STL vectors found in the given
// memory range.
//
// Linux only, enabled with BUILD_VECTORS cmake option.
// Linux and OS X only
#include "Core.h"
#include <Console.h>
#include <Export.h>
#include <PluginManager.h>
#include <MemAccess.h>
#include <vector>
#include <string>
#include <stdio.h>
#include "Core.h"
#include "Console.h"
#include "Export.h"
#include "PluginManager.h"
#include "MemAccess.h"
#include "VersionInfo.h"
using std::vector;
using std::string;
using namespace DFHack;
@ -58,7 +60,7 @@ static bool hexOrDec(string &str, uint32_t &value)
return false;
}
static bool mightBeVec(vector<t_memrange> &heap_ranges,
static bool mightBeVec(vector<t_memrange> &ranges,
t_vecTriplet *vec)
{
if ((vec->start > vec->end) || (vec->end > vec->alloc_end))
@ -70,9 +72,9 @@ static bool mightBeVec(vector<t_memrange> &heap_ranges,
if (((int)vec->start % 4 != 0) || ((int)vec->alloc_end % 4 != 0))
return false;
for (size_t i = 0; i < heap_ranges.size(); i++)
for (size_t i = 0; i < ranges.size(); i++)
{
t_memrange &range = heap_ranges[i];
t_memrange &range = ranges[i];
if (range.isInRange(vec->start) && range.isInRange(vec->alloc_end))
return true;
@ -92,7 +94,7 @@ static bool inAnyRange(vector<t_memrange> &ranges, void * ptr)
return false;
}
static bool getHeapRanges(color_ostream &out, std::vector<t_memrange> &heap_ranges)
static bool getRanges(color_ostream &out, std::vector<t_memrange> &out_ranges)
{
std::vector<t_memrange> ranges;
@ -102,19 +104,13 @@ static bool getHeapRanges(color_ostream &out, std::vector<t_memrange> &heap_rang
{
t_memrange &range = ranges[i];
// Some kernels don't report [heap], and the heap can consist of
// more segments than just the one labeled with [heap], so include
// all segments which *might* be part of the heap.
if (range.read && range.write && !range.shared)
{
if (strlen(range.name) == 0 || strcmp(range.name, "[heap]") == 0)
heap_ranges.push_back(range);
}
out_ranges.push_back(range);
}
if (heap_ranges.empty())
if (out_ranges.empty())
{
out << "No possible heap segments." << std::endl;
out << "No readable segments." << std::endl;
return false;
}
@ -132,13 +128,26 @@ static void vectorsUsage(color_ostream &con)
}
static void printVec(color_ostream &con, const char* msg, t_vecTriplet *vec,
uint32_t start, uint32_t pos)
uint32_t start, uint32_t pos, std::vector<t_memrange> &ranges)
{
uint32_t length = (int)vec->end - (int)vec->start;
uint32_t offset = pos - start;
con.print("%8s offset %06p, addr %010p, start %010p, length %u\n",
con.print("%8s offset %06p, addr %010p, start %010p, length %u",
msg, offset, pos, vec->start, length);
if (length >= 4 && length % 4 == 0)
{
void *ptr = vec->start;
for (int level = 0; level < 2; level++)
{
if (inAnyRange(ranges, ptr))
ptr = *(void**)ptr;
}
std::string classname;
if (Core::getInstance().vinfo->getVTableName(ptr, classname))
con.print(", 1st item: %s", classname.c_str());
}
con.print("\n");
}
command_result df_vectors (color_ostream &con, vector <string> & parameters)
@ -171,17 +180,17 @@ command_result df_vectors (color_ostream &con, vector <string> & parameters)
CoreSuspender suspend;
std::vector<t_memrange> heap_ranges;
std::vector<t_memrange> ranges;
if (!getHeapRanges(con, heap_ranges))
if (!getRanges(con, ranges))
{
return CR_FAILURE;
}
bool startInRange = false;
for (size_t i = 0; i < heap_ranges.size(); i++)
for (size_t i = 0; i < ranges.size(); i++)
{
t_memrange &range = heap_ranges[i];
t_memrange &range = ranges[i];
if (!range.isInRange((void *)start))
continue;
@ -217,9 +226,9 @@ command_result df_vectors (color_ostream &con, vector <string> & parameters)
{
t_vecTriplet* vec = (t_vecTriplet*) pos;
if (mightBeVec(heap_ranges, vec))
if (mightBeVec(ranges, vec))
{
printVec(con, "VEC:", vec, start, pos);
printVec(con, "VEC:", vec, start, pos, ranges);
// Skip over rest of vector.
pos += sizeof(t_vecTriplet) - ptr_size;
continue;
@ -231,13 +240,13 @@ command_result df_vectors (color_ostream &con, vector <string> & parameters)
{
uint32_t ptr = * ( (uint32_t*) pos);
if (inAnyRange(heap_ranges, (void *) ptr))
if (inAnyRange(ranges, (void *) ptr))
{
t_vecTriplet* vec = (t_vecTriplet*) ptr;
if (mightBeVec(heap_ranges, vec))
if (mightBeVec(ranges, vec))
{
printVec(con, "VEC PTR:", vec, start, pos);
printVec(con, "VEC PTR:", vec, start, pos, ranges);
continue;
}
}
@ -282,9 +291,9 @@ command_result df_clearvec (color_ostream &con, vector <string> & parameters)
CoreSuspender suspend;
std::vector<t_memrange> heap_ranges;
std::vector<t_memrange> ranges;
if (!getHeapRanges(con, heap_ranges))
if (!getRanges(con, ranges))
{
return CR_FAILURE;
}
@ -305,7 +314,7 @@ command_result df_clearvec (color_ostream &con, vector <string> & parameters)
continue;
}
if (!inAnyRange(heap_ranges, (void *) addr))
if (!inAnyRange(ranges, (void *) addr))
{
con << addr_str << " not in any valid address range." << std::endl;
continue;
@ -315,7 +324,7 @@ command_result df_clearvec (color_ostream &con, vector <string> & parameters)
bool ptr = false;
t_vecTriplet* vec = (t_vecTriplet*) addr;
if (mightBeVec(heap_ranges, vec))
if (mightBeVec(ranges, vec))
valid = true;
else
{
@ -323,7 +332,7 @@ command_result df_clearvec (color_ostream &con, vector <string> & parameters)
addr = * ( (uint32_t*) addr);
vec = (t_vecTriplet*) addr;
if (inAnyRange(heap_ranges, (void *) addr) && mightBeVec(heap_ranges, vec))
if (inAnyRange(ranges, (void *) addr) && mightBeVec(ranges, vec))
{
valid = true;
ptr = true;