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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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15
src/common/module.h
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@ -85,10 +85,19 @@ class Module {
int source_id;
};
// An address range.
struct Range {
Range(const Address address_input, const Address size_input) :
address(address_input), size(size_input) { }
Address address;
Address size;
};
// A function.
struct Function {
Function(const string &name_input, const Address &address_input) :
name(name_input), address(address_input), size(0), parameter_size(0) {}
name(name_input), address(address_input), parameter_size(0) {}
// For sorting by address. (Not style-guide compliant, but it's
// stupid not to put this in the struct.)
@ -99,9 +108,9 @@ class Module {
// The function's name.
const string name;
// The start address and length of the function's code.
// The start address and the address ranges covered by the function.
const Address address;
Address size;
vector<Range> ranges;
// The function's parameter size.
Address parameter_size;