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// Copyright 2013 Google Inc. All rights reserved.
//
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// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
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// * Redistributions in binary form must reproduce the above
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// in the documentation and/or other materials provided with the
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//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Unittests for OMAP related functions.
#include "common/windows/omap.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
namespace google_breakpad {
// Equality operators for ContainerEq. These must be outside of the anonymous
// namespace in order for them to be found.
bool operator==(const MappedRange& mr1, const MappedRange& mr2) {
return mr1.rva_original == mr2.rva_original &&
mr1.rva_transformed == mr2.rva_transformed &&
mr1.length == mr2.length &&
mr1.injected == mr2.injected &&
mr1.removed == mr2.removed;
}
bool operator==(const EndpointIndex& ei1, const EndpointIndex& ei2) {
return ei1.endpoint == ei2.endpoint && ei1.index == ei2.index;
}
// Pretty printers for more meaningful error messages. Also need to be outside
// the anonymous namespace.
std::ostream& operator<<(std::ostream& os, const MappedRange& mr) {
os << "MappedRange(rva_original=" << mr.rva_original
<< ", rva_transformed=" << mr.rva_transformed
<< ", length=" << mr.length
<< ", injected=" << mr.injected
<< ", removed=" << mr.removed << ")";
return os;
}
std::ostream& operator<<(std::ostream& os, const EndpointIndex& ei) {
os << "EndpointIndex(endpoint=" << ei.endpoint
<< ", index=" << ei.index << ")";
return os;
}
std::ostream& operator<<(std::ostream& os, const AddressRange& ar) {
os << "AddressRange(rva=" << ar.rva << ", length=" << ar.length << ")";
return os;
}
namespace {
OMAP CreateOmap(DWORD rva, DWORD rvaTo) {
OMAP o = { rva, rvaTo };
return o;
}
MappedRange CreateMappedRange(DWORD rva_original,
DWORD rva_transformed,
DWORD length,
DWORD injected,
DWORD removed) {
MappedRange mr = { rva_original, rva_transformed, length, injected, removed };
return mr;
}
EndpointIndex CreateEndpointIndex(DWORD endpoint, size_t index) {
EndpointIndex ei = { endpoint, index };
return ei;
}
// (C is removed)
// Original : A B C D E F G H
// Transformed: A B D F E * H1 G1 G2 H2
// (* is injected, G is copied, H is split)
// A is implied.
// Layout of the original image.
const AddressRange B(100, 15);
const AddressRange C(B.end(), 10);
const AddressRange D(C.end(), 25);
const AddressRange E(D.end(), 10);
const AddressRange F(E.end(), 40);
const AddressRange G(F.end(), 3);
const AddressRange H(G.end(), 7);
// Layout of the transformed image.
const AddressRange Bt(100, 15);
const AddressRange Dt(Bt.end(), 20); // D is shortened.
const AddressRange Ft(Dt.end(), F.length);
const AddressRange Et(Ft.end(), E.length);
const AddressRange injected(Et.end(), 5);
const AddressRange H1t(injected.end(), 4); // H is split.
const AddressRange G1t(H1t.end(), G.length); // G is copied.
const AddressRange G2t(G1t.end(), G.length); // G is copied.
const AddressRange H2t(G2t.end(), 3); // H is split.
class BuildImageMapTest : public testing::Test {
public:
static const DWORD kInvalidAddress = 0xFFFFFFFF;
void InitOmapData() {
omap_data.length_original = H.end();
// Build the OMAPTO vector (from transformed to original).
omap_data.omap_to.push_back(CreateOmap(Bt.rva, B.rva));
omap_data.omap_to.push_back(CreateOmap(Dt.rva, D.rva));
omap_data.omap_to.push_back(CreateOmap(Ft.rva, F.rva));
omap_data.omap_to.push_back(CreateOmap(Et.rva, E.rva));
omap_data.omap_to.push_back(CreateOmap(injected.rva, kInvalidAddress));
omap_data.omap_to.push_back(CreateOmap(H1t.rva, H.rva));
omap_data.omap_to.push_back(CreateOmap(G1t.rva, G.rva));
omap_data.omap_to.push_back(CreateOmap(G2t.rva, G.rva));
omap_data.omap_to.push_back(CreateOmap(H2t.rva, H.rva + H1t.length));
omap_data.omap_to.push_back(CreateOmap(H2t.end(), kInvalidAddress));
// Build the OMAPFROM vector (from original to transformed).
omap_data.omap_from.push_back(CreateOmap(B.rva, Bt.rva));
omap_data.omap_from.push_back(CreateOmap(C.rva, kInvalidAddress));
omap_data.omap_from.push_back(CreateOmap(D.rva, Dt.rva));
omap_data.omap_from.push_back(CreateOmap(E.rva, Et.rva));
omap_data.omap_from.push_back(CreateOmap(F.rva, Ft.rva));
omap_data.omap_from.push_back(CreateOmap(G.rva, G1t.rva));
omap_data.omap_from.push_back(CreateOmap(H.rva, H1t.rva));
omap_data.omap_from.push_back(CreateOmap(H.rva + H1t.length, H2t.rva));
omap_data.omap_from.push_back(CreateOmap(H.end(), kInvalidAddress));
}
OmapData omap_data;
};
} // namespace
TEST_F(BuildImageMapTest, EmptyImageMapOnEmptyOmapData) {
ASSERT_EQ(0u, omap_data.omap_from.size());
ASSERT_EQ(0u, omap_data.omap_to.size());
ASSERT_EQ(0u, omap_data.length_original);
ImageMap image_map;
BuildImageMap(omap_data, &image_map);
EXPECT_EQ(0u, image_map.mapping.size());
EXPECT_EQ(0u, image_map.endpoint_index_map.size());
}
TEST_F(BuildImageMapTest, ImageMapIsCorrect) {
InitOmapData();
ASSERT_LE(0u, omap_data.omap_from.size());
ASSERT_LE(0u, omap_data.omap_to.size());
ASSERT_LE(0u, omap_data.length_original);
ImageMap image_map;
BuildImageMap(omap_data, &image_map);
EXPECT_LE(9u, image_map.mapping.size());
EXPECT_LE(9u, image_map.endpoint_index_map.size());
Mapping mapping;
mapping.push_back(CreateMappedRange(0, 0, B.rva, 0, 0));
// C is removed, and it originally comes immediately after B.
mapping.push_back(CreateMappedRange(B.rva, Bt.rva, B.length, 0, C.length));
// D is shortened by a length of 5.
mapping.push_back(CreateMappedRange(D.rva, Dt.rva, Dt.length, 0, 5));
// The injected content comes immediately after E in the transformed image.
mapping.push_back(CreateMappedRange(E.rva, Et.rva, E.length, injected.length,
0));
mapping.push_back(CreateMappedRange(F.rva, Ft.rva, F.length, 0, 0));
// G is copied so creates two entries.
mapping.push_back(CreateMappedRange(G.rva, G1t.rva, G.length, 0, 0));
mapping.push_back(CreateMappedRange(G.rva, G2t.rva, G.length, 0, 0));
// H is split, so create two entries.
mapping.push_back(CreateMappedRange(H.rva, H1t.rva, H1t.length, 0, 0));
mapping.push_back(CreateMappedRange(H.rva + H1t.length, H2t.rva, H2t.length,
0, 0));
EXPECT_THAT(mapping,
testing::ContainerEq(image_map.mapping));
EndpointIndexMap endpoint_index_map;
endpoint_index_map.push_back(CreateEndpointIndex(0, 0));
endpoint_index_map.push_back(CreateEndpointIndex(B.rva, 1));
endpoint_index_map.push_back(CreateEndpointIndex(D.rva, 2));
endpoint_index_map.push_back(CreateEndpointIndex(E.rva, 3));
endpoint_index_map.push_back(CreateEndpointIndex(F.rva, 4));
// G is duplicated so 2 ranges map back to it, hence the skip from 5 to 7.
endpoint_index_map.push_back(CreateEndpointIndex(G.rva, 5));
// H is split so we expect 2 endpoints to show up attributed to it.
endpoint_index_map.push_back(CreateEndpointIndex(H.rva, 7));
endpoint_index_map.push_back(CreateEndpointIndex(H.rva + H1t.length, 8));
endpoint_index_map.push_back(CreateEndpointIndex(H.end(), 9));
EXPECT_THAT(endpoint_index_map,
testing::ContainerEq(image_map.endpoint_index_map));
}
namespace {
class MapAddressRangeTest : public BuildImageMapTest {
public:
typedef BuildImageMapTest Super;
virtual void SetUp() {
Super::SetUp();
InitOmapData();
BuildImageMap(omap_data, &image_map);
}
ImageMap image_map;
private:
using BuildImageMapTest::InitOmapData;
using BuildImageMapTest::omap_data;
};
} // namespace
TEST_F(MapAddressRangeTest, EmptyImageMapReturnsIdentity) {
ImageMap im;
AddressRangeVector mapped_ranges;
AddressRange ar(0, 1024);
MapAddressRange(im, ar, &mapped_ranges);
EXPECT_EQ(1u, mapped_ranges.size());
EXPECT_EQ(ar, mapped_ranges[0]);
}
TEST_F(MapAddressRangeTest, MapOutOfImage) {
AddressRangeVector mapped_ranges;
MapAddressRange(image_map, AddressRange(H.end() + 10, 10), &mapped_ranges);
EXPECT_EQ(0u, mapped_ranges.size());
}
TEST_F(MapAddressRangeTest, MapIdentity) {
AddressRangeVector mapped_ranges;
MapAddressRange(image_map, B, &mapped_ranges);
EXPECT_EQ(1u, mapped_ranges.size());
EXPECT_THAT(mapped_ranges, testing::ElementsAre(B));
}
TEST_F(MapAddressRangeTest, MapReorderedContiguous) {
AddressRangeVector mapped_ranges;
AddressRange DEF(D.rva, F.end() - D.rva);
MapAddressRange(image_map, DEF, &mapped_ranges);
EXPECT_EQ(1u, mapped_ranges.size());
AddressRange DFEt(Dt.rva, Et.end() - Dt.rva);
EXPECT_THAT(mapped_ranges, testing::ElementsAre(DFEt));
}
TEST_F(MapAddressRangeTest, MapEmptySingle) {
AddressRangeVector mapped_ranges;
MapAddressRange(image_map, AddressRange(D.rva, 0), &mapped_ranges);
EXPECT_EQ(1u, mapped_ranges.size());
EXPECT_THAT(mapped_ranges, testing::ElementsAre(AddressRange(Dt.rva, 0)));
}
TEST_F(MapAddressRangeTest, MapEmptyCopied) {
AddressRangeVector mapped_ranges;
MapAddressRange(image_map, AddressRange(G.rva, 0), &mapped_ranges);
EXPECT_EQ(2u, mapped_ranges.size());
EXPECT_THAT(mapped_ranges, testing::ElementsAre(AddressRange(G1t.rva, 0),
AddressRange(G2t.rva, 0)));
}
TEST_F(MapAddressRangeTest, MapCopiedContiguous) {
AddressRangeVector mapped_ranges;
MapAddressRange(image_map, G, &mapped_ranges);
EXPECT_EQ(1u, mapped_ranges.size());
EXPECT_THAT(mapped_ranges, testing::ElementsAre(
AddressRange(G1t.rva, G2t.end() - G1t.rva)));
}
TEST_F(MapAddressRangeTest, MapSplitDiscontiguous) {
AddressRangeVector mapped_ranges;
MapAddressRange(image_map, H, &mapped_ranges);
EXPECT_EQ(2u, mapped_ranges.size());
EXPECT_THAT(mapped_ranges, testing::ElementsAre(H1t, H2t));
}
TEST_F(MapAddressRangeTest, MapInjected) {
AddressRangeVector mapped_ranges;
AddressRange EFGH(E.rva, H.end() - E.rva);
MapAddressRange(image_map, EFGH, &mapped_ranges);
EXPECT_EQ(1u, mapped_ranges.size());
AddressRange FEHGGHt(Ft.rva, H2t.end() - Ft.rva);
EXPECT_THAT(mapped_ranges, testing::ElementsAre(FEHGGHt));
}
TEST_F(MapAddressRangeTest, MapRemovedEntirely) {
AddressRangeVector mapped_ranges;
MapAddressRange(image_map, C, &mapped_ranges);
EXPECT_EQ(0u, mapped_ranges.size());
}
TEST_F(MapAddressRangeTest, MapRemovedPartly) {
AddressRangeVector mapped_ranges;
MapAddressRange(image_map, D, &mapped_ranges);
EXPECT_EQ(1u, mapped_ranges.size());
EXPECT_THAT(mapped_ranges, testing::ElementsAre(Dt));
}
TEST_F(MapAddressRangeTest, MapFull) {
AddressRangeVector mapped_ranges;
AddressRange AH(0, H.end());
MapAddressRange(image_map, AH, &mapped_ranges);
EXPECT_EQ(1u, mapped_ranges.size());
AddressRange AHt(0, H2t.end());
EXPECT_THAT(mapped_ranges, testing::ElementsAre(AHt));
}
} // namespace google_breakpad