| // Copyright 2020 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef BLOATY_LINK_MAP_H_ |
| #define BLOATY_LINK_MAP_H_ |
| |
| #include <cstddef> |
| #include <cstdint> |
| #include <optional> |
| #include <string> |
| #include <tuple> |
| #include <vector> |
| |
| namespace bloaty_link_map { |
| |
| struct Symbol { |
| std::string name; |
| std::string compile_unit; |
| std::string section; |
| uint64_t addr; |
| uint64_t size; |
| }; |
| |
| // Parses a linker map file in lld v1 format. |
| // |
| // This function is adapted from |
| // https://chromium.googlesource.com/chromium/src.git/+/master/tools/binary_size/libsupersize/linker_map_parser.py |
| // |
| // Args: |
| // content: Contents of the link map, the first line of which is the header. |
| // |
| // Returns: |
| // A vector of symbols. |
| // |
| // Example format: |
| // VMA LMA Size Align Out In Symbol |
| // 194 194 13 1 .interp |
| // 194 194 13 1 <internal>:(.interp) |
| // 1a8 1a8 22d8 4 .ARM.exidx |
| // 1b0 1b0 8 4 obj/sandbox/syscall.o:(.ARM.exidx) |
| // 400 400 123400 64 .text |
| // 600 600 14 4 ...:(.text.OUTLINED_FUNCTION_0) |
| // 600 600 0 1 $x.3 |
| // 600 600 14 1 OUTLINED_FUNCTION_0 |
| // 123800 123800 20000 256 .rodata |
| // 123800 123800 4 4 ...:o:(.rodata._ZN3fooE.llvm.1234) |
| // 123800 123800 4 1 foo (.llvm.1234) |
| // 123804 123804 4 4 ...:o:(.rodata.bar.llvm.1234) |
| // 123804 123804 4 1 bar.llvm.1234 |
| // |
| // Notes: |
| // - `VMA` and `LMA` are mostly identical. |
| // - In a position-independent executable, the base address is zero. |
| // Hence the minimum value of the addresses is quite small. |
| // - Stripping of the binary will not relocate symbols, hence the addresses |
| // will be the same between a stripped and unstripped binary. |
| std::vector<Symbol> ParseLldLinkMap(const std::string& content); |
| |
| struct Section { |
| std::string name; |
| uint64_t addr; |
| uint64_t size; |
| }; |
| |
| std::vector<Section> ParseLldLinkMapSections(const std::string& content); |
| |
| // Transform the compile unit path parsed from link maps to a format |
| // easier to organize, specialized to a Fuchsia build. |
| // If the compile unit could not be understood by the transformer, it will |
| // return `std::nullopt`. Since bloaty can still recover some compile unit |
| // information from DWARF, we do not have to cover 100% here. For Rust however, |
| // this allows setting a reasonable fallback compile unit at the crate level. |
| // Therefore, the output of this transform should be inserted after the |
| // usual DWARF-based compile unit data source. |
| // |
| // Examples: |
| // |
| // `./exe.unstripped/component_manager.alloc-54127f36ba192482.alloc.4k1iwrm2-cgu.0.rcgu.o.rcgu.o` |
| // becomes `[crate: alloc]`. |
| // |
| // `./exe.unstripped/component_manager.libcomponent_manager_lib.component_manager_lib.3a1fbbbh-cgu.2.rcgu.o.rcgu.o` |
| // becomes `[crate: component_manager_lib]`. |
| // |
| // `./exe.unstripped/component_manager.libcm_fidl_translator.cm_fidl_translator.3a1fbbbh-cgu.0.rcgu.o.rcgu.o` |
| // becomes `[crate: cm_fidl_translator]`. |
| // |
| // `./exe.unstripped/component_manager.component_manager.7rcbfp3g-cgu.0.rcgu.o` |
| // becomes `[crate: component_manager]`. |
| // |
| // `./exe.unstripped/component_manager.libfidl_fuchsia_io.fidl_fuchsia_io.3a1fbbbh-cgu.0.rcgu.o.rcgu.o` |
| // becomes `[crate: fidl_fuchsia_io]`. |
| // |
| // `/usr/local/google/home/yifeit/vg/out/default/obj/third_party/rust_crates/libregex_syntax-579ced0738b0164d.rlib(libregex_syntax-579ced0738b0164d-579ced0738b0164d.regex_syntax.c02sfxfu-cgu.13.rcgu.o)` |
| // becomes `[crate: regex_syntax]`. |
| // |
| // `/usr/local/google/home/yifeit/vg/out/default.zircon/user-arm64-clang.shlib/obj/system/ulib/c/crt1.Scrt1.cc.o` |
| // becomes `../../zircon/system/ulib/c/Scrt1.cc`. |
| // |
| // `obj/out/default/fidling/gen/sdk/fidl/fuchsia.hardware.block/fuchsia.hardware.block_tables.fuchsia.hardware.block.fidl.tables.c.o` |
| // becomes `fidling/gen/sdk/fidl/fuchsia.hardware.block/fuchsia.hardware.block.fidl.tables.c`. |
| // |
| // `obj/zircon/public/lib/fidl_base/libfidl_base.a(libfidl_base.decoding.cc.o)` |
| // becomes `../../zircon/system/ulib/fidl/decoding.cc` |
| // |
| // `obj/zircon/system/uapp/blobfs/blobfs.main.cc.o` |
| // becomes `../../zircon/system/uapp/blobfs/main.cc` |
| // |
| // `obj/zircon/system/ulib/trace-provider/libtrace-provider-with-fdio.a(libtrace-provider-with-fdio.fdio_connect.cc.o)` |
| // is not suppported. |
| // |
| // `obj/zircon/public/lib/lz4/liblz4.a(liblz4.lz4hc.c.o)` is not supported. |
| std::optional<std::tuple<std::string, std::optional<std::string>>> TransformCompileUnitForFuchsia( |
| const std::string& compile_unit); |
| |
| } // namespace bloaty_link_map |
| |
| #endif // BLOATY_LINK_MAP_H_ |
