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Add support for parsing the DW_AT_ranges attributes

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This enables the DWARF reader to properly parse DW_AT_ranges attributes
in compilation units and functions. Code covered by a function is now
represented by a vector of ranges instead of a single contiguous range
and DW_AT_ranges entries are used to populate it. All the code and tests
that assumed functions to be contiguous entities has been updated to
reflect the change. DW_AT_ranges attributes found in compilation units
are parsed but no data is generated for them as it is not currently needed.

BUG=754

Change-Id: I310391b525aaba0dd329f1e3187486f2e0c6d442
Reviewed-on: https://chromium-review.googlesource.com/1124721
Reviewed-by: Ted Mielczarek <ted.mielczarek@gmail.com>
This commit is contained in:
Gabriele Svelto
2018-08-04 00:59:34 +02:00
committed by Ted Mielczarek
parent 7b98edabb6
commit 16e08520e6
20 changed files with 653 additions and 122 deletions
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8
src/common/stabs_to_module_unittest.cc
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@@ -64,7 +64,7 @@ TEST(StabsToModule, SimpleCU) {
Module::Function *function = functions[0];
EXPECT_STREQ("function", function->name.c_str());
EXPECT_EQ(0xfde4abbed390c394LL, function->address);
EXPECT_EQ(0x10U, function->size);
EXPECT_EQ(0x10U, function->ranges[0].size);
EXPECT_EQ(0U, function->parameter_size);
ASSERT_EQ((size_t) 1, function->lines.size());
Module::Line *line = &function->lines[0];
@@ -130,7 +130,7 @@ TEST(StabsToModule, DuplicateFunctionNames) {
Module::Function *function = functions[0];
EXPECT_EQ(0xf2cfda36ecf7f46dLL, function->address);
EXPECT_LT(0U, function->size); // should have used dummy size
EXPECT_LT(0U, function->ranges[0].size); // should have used dummy size
EXPECT_EQ(0U, function->parameter_size);
ASSERT_EQ(0U, function->lines.size());
}
@@ -166,7 +166,7 @@ TEST(InferSizes, LineSize) {
Module::Function *function = functions[0];
EXPECT_STREQ("function", function->name.c_str());
EXPECT_EQ(0xb4513962eff94e92LL, function->address);
EXPECT_EQ(0x1000100000000ULL, function->size); // inferred from CU end
EXPECT_EQ(0x1000100000000ULL, function->ranges[0].size); // inferred from CU end
EXPECT_EQ(0U, function->parameter_size);
ASSERT_EQ((size_t) 2, function->lines.size());
@@ -216,7 +216,7 @@ TEST(FunctionNames, Mangled) {
"push_back(unsigned long long const&)",
function->name.c_str());
EXPECT_EQ(0xf2cfda63cef7f46dLL, function->address);
EXPECT_LT(0U, function->size); // should have used dummy size
EXPECT_LT(0U, function->ranges[0].size); // should have used dummy size
EXPECT_EQ(0U, function->parameter_size);
ASSERT_EQ(0U, function->lines.size());
}