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platform_build_soong/symbol_inject/macho_symboldata_test.go

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Rewrite symbol_inject to be testable Parse the machine-specific symbol tables into a custom symbol table object and use a single function to find the offset and size of the symbol in the custom table. Make the functions to convert a machine-specific symbol table into the custom table also take mocks, and provide functions to dump mocks from real files. Add tests that take the mocks and verify they produce the right offset and size. Test: cmd/symbol_inject/*_test.go Change-Id: I25654032b5017dd13a9a1fe29f8b8826ce5bc82b
2018-03-02 03:20:25 +08:00
// Copyright 2018 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.
Turn symbol_inject into a reusable package Bug: 31559095 Test: m blueprint_tools Change-Id: I0f7a9f14111af26d753db547c6de313a7079658a
2018-10-15 15:35:59 +08:00
package symbol_inject
Rewrite symbol_inject to be testable Parse the machine-specific symbol tables into a custom symbol table object and use a single function to find the offset and size of the symbol in the custom table. Make the functions to convert a machine-specific symbol table into the custom table also take mocks, and provide functions to dump mocks from real files. Add tests that take the mocks and verify they produce the right offset and size. Test: cmd/symbol_inject/*_test.go Change-Id: I25654032b5017dd13a9a1fe29f8b8826ce5bc82b
2018-03-02 03:20:25 +08:00
import (
"debug/macho"
)
/* Generated from: clang -o a.out test.c
#include <unistd.h>
char soong_build_number[128] = "PLACEHOLDER";
int main() {
write(STDOUT_FILENO, soong_build_number, sizeof(soong_build_number));
}
*/
var machoSymbolTable1 = &macho.File{
Sections: []*macho.Section{
&macho.Section{SectionHeader: macho.SectionHeader{Name: "__text", Seg: "__TEXT", Addr: 0x100000f50, Size: 0x2e, Offset: 0xf50, Align: 0x4, Reloff: 0x0, Nreloc: 0x0, Flags: 0x80000400}},
&macho.Section{SectionHeader: macho.SectionHeader{Name: "__stubs", Seg: "__TEXT", Addr: 0x100000f7e, Size: 0x6, Offset: 0xf7e, Align: 0x1, Reloff: 0x0, Nreloc: 0x0, Flags: 0x80000408}},
&macho.Section{SectionHeader: macho.SectionHeader{Name: "__stub_helper", Seg: "__TEXT", Addr: 0x100000f84, Size: 0x1a, Offset: 0xf84, Align: 0x2, Reloff: 0x0, Nreloc: 0x0, Flags: 0x80000400}},
&macho.Section{SectionHeader: macho.SectionHeader{Name: "__unwind_info", Seg: "__TEXT", Addr: 0x100000fa0, Size: 0x48, Offset: 0xfa0, Align: 0x2, Reloff: 0x0, Nreloc: 0x0, Flags: 0x0}},
&macho.Section{SectionHeader: macho.SectionHeader{Name: "__eh_frame", Seg: "__TEXT", Addr: 0x100000fe8, Size: 0x18, Offset: 0xfe8, Align: 0x3, Reloff: 0x0, Nreloc: 0x0, Flags: 0x0}},
&macho.Section{SectionHeader: macho.SectionHeader{Name: "__nl_symbol_ptr", Seg: "__DATA", Addr: 0x100001000, Size: 0x10, Offset: 0x1000, Align: 0x3, Reloff: 0x0, Nreloc: 0x0, Flags: 0x6}},
&macho.Section{SectionHeader: macho.SectionHeader{Name: "__la_symbol_ptr", Seg: "__DATA", Addr: 0x100001010, Size: 0x8, Offset: 0x1010, Align: 0x3, Reloff: 0x0, Nreloc: 0x0, Flags: 0x7}},
&macho.Section{SectionHeader: macho.SectionHeader{Name: "__data", Seg: "__DATA", Addr: 0x100001020, Size: 0x80, Offset: 0x1020, Align: 0x4, Reloff: 0x0, Nreloc: 0x0, Flags: 0x0}},
},
Symtab: &macho.Symtab{
Syms: []macho.Symbol{
macho.Symbol{Name: "__mh_execute_header", Type: 0xf, Sect: 0x1, Desc: 0x10, Value: 0x100000000},
macho.Symbol{Name: "_main", Type: 0xf, Sect: 0x1, Desc: 0x0, Value: 0x100000f50},
macho.Symbol{Name: "_soong_build_number", Type: 0xf, Sect: 0x8, Desc: 0x0, Value: 0x100001020},
macho.Symbol{Name: "_write", Type: 0x1, Sect: 0x0, Desc: 0x100, Value: 0x0},
macho.Symbol{Name: "dyld_stub_binder", Type: 0x1, Sect: 0x0, Desc: 0x100, Value: 0x0},
},
},
}
/* Generated from: clang -o a.out test2.c
#include <unistd.h>
char symbol1[128] = "PLACEHOLDER1";
char symbol2[128] = "PLACEHOLDER2";
int main() {
write(STDOUT_FILENO, symbol1, sizeof(symbol1));
write(STDOUT_FILENO, symbol2, sizeof(symbol2));
}
*/
var machoSymbolTable2 = &macho.File{
Sections: []*macho.Section{
&macho.Section{SectionHeader: macho.SectionHeader{Name: "__text", Seg: "__TEXT", Addr: 0x100000f30, Size: 0x4a, Offset: 0xf30, Align: 0x4, Reloff: 0x0, Nreloc: 0x0, Flags: 0x80000400}},
&macho.Section{SectionHeader: macho.SectionHeader{Name: "__stubs", Seg: "__TEXT", Addr: 0x100000f7a, Size: 0x6, Offset: 0xf7a, Align: 0x1, Reloff: 0x0, Nreloc: 0x0, Flags: 0x80000408}},
&macho.Section{SectionHeader: macho.SectionHeader{Name: "__stub_helper", Seg: "__TEXT", Addr: 0x100000f80, Size: 0x1a, Offset: 0xf80, Align: 0x2, Reloff: 0x0, Nreloc: 0x0, Flags: 0x80000400}},
&macho.Section{SectionHeader: macho.SectionHeader{Name: "__unwind_info", Seg: "__TEXT", Addr: 0x100000f9c, Size: 0x48, Offset: 0xf9c, Align: 0x2, Reloff: 0x0, Nreloc: 0x0, Flags: 0x0}},
&macho.Section{SectionHeader: macho.SectionHeader{Name: "__eh_frame", Seg: "__TEXT", Addr: 0x100000fe8, Size: 0x18, Offset: 0xfe8, Align: 0x3, Reloff: 0x0, Nreloc: 0x0, Flags: 0x0}},
&macho.Section{SectionHeader: macho.SectionHeader{Name: "__nl_symbol_ptr", Seg: "__DATA", Addr: 0x100001000, Size: 0x10, Offset: 0x1000, Align: 0x3, Reloff: 0x0, Nreloc: 0x0, Flags: 0x6}},
&macho.Section{SectionHeader: macho.SectionHeader{Name: "__la_symbol_ptr", Seg: "__DATA", Addr: 0x100001010, Size: 0x8, Offset: 0x1010, Align: 0x3, Reloff: 0x0, Nreloc: 0x0, Flags: 0x7}},
&macho.Section{SectionHeader: macho.SectionHeader{Name: "__data", Seg: "__DATA", Addr: 0x100001020, Size: 0x100, Offset: 0x1020, Align: 0x4, Reloff: 0x0, Nreloc: 0x0, Flags: 0x0}},
},
Symtab: &macho.Symtab{
Syms: []macho.Symbol{
macho.Symbol{Name: "__mh_execute_header", Type: 0xf, Sect: 0x1, Desc: 0x10, Value: 0x100000000},
macho.Symbol{Name: "_main", Type: 0xf, Sect: 0x1, Desc: 0x0, Value: 0x100000f30},
macho.Symbol{Name: "_symbol1", Type: 0xf, Sect: 0x8, Desc: 0x0, Value: 0x100001020},
macho.Symbol{Name: "_symbol2", Type: 0xf, Sect: 0x8, Desc: 0x0, Value: 0x1000010a0},
macho.Symbol{Name: "_write", Type: 0x1, Sect: 0x0, Desc: 0x100, Value: 0x0},
macho.Symbol{Name: "dyld_stub_binder", Type: 0x1, Sect: 0x0, Desc: 0x100, Value: 0x0},
},
},
}