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Add an option to the gold plugin to make it emit a file with the public api

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list that can in turn be passed to -internalize pass through
-internalize-public-api-file.

Pass gold -plugin-opt=generate-api-file to produce "apifile.txt" in the current
directory.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65295 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky 2009-02-22 22:15:44 +00:00
parent bc989d462d
commit ca4286295f
1 changed files with 23 additions and 1 deletions
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22
tools/gold/gold-plugin.cpp
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@ -22,6 +22,7 @@
#include <cerrno> #include <cerrno>
#include <cstdlib> #include <cstdlib>
#include <cstring> #include <cstring>
#include <fstream>
#include <list> #include <list>
#include <vector> #include <vector>
@ -42,6 +43,8 @@ namespace {
int api_version = 0; int api_version = 0;
int gold_version = 0; int gold_version = 0;
bool generate_api_file = false;
struct claimed_file { struct claimed_file {
lto_module_t M; lto_module_t M;
void *handle; void *handle;
@ -96,7 +99,11 @@ ld_plugin_status onload(ld_plugin_tv *tv) {
//output_type = LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC; //output_type = LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC;
break; break;
case LDPT_OPTION: case LDPT_OPTION:
if (strcmp("generate-api-file", tv->tv_u.tv_string) == 0) {
generate_api_file = true;
} else {
(*message)(LDPL_WARNING, "Ignoring flag %s", tv->tv_u.tv_string); (*message)(LDPL_WARNING, "Ignoring flag %s", tv->tv_u.tv_string);
}
break; break;
case LDPT_REGISTER_CLAIM_FILE_HOOK: { case LDPT_REGISTER_CLAIM_FILE_HOOK: {
ld_plugin_register_claim_file callback; ld_plugin_register_claim_file callback;
@ -285,6 +292,15 @@ ld_plugin_status all_symbols_read_hook(void) {
E = Modules.end(); I != E; ++I) E = Modules.end(); I != E; ++I)
lto_codegen_add_module(cg, I->M); lto_codegen_add_module(cg, I->M);
std::ofstream api_file;
if (generate_api_file) {
api_file.open("apifile.txt", std::ofstream::out | std::ofstream::trunc);
if (!api_file.is_open()) {
(*message)(LDPL_FATAL, "Unable to open apifile.txt for writing.");
abort();
}
}
// If we don't preserve any symbols, libLTO will assume that all symbols are // If we don't preserve any symbols, libLTO will assume that all symbols are
// needed. Keep all symbols unless we're producing a final executable. // needed. Keep all symbols unless we're producing a final executable.
if (output_type == LTO_CODEGEN_PIC_MODEL_STATIC) { if (output_type == LTO_CODEGEN_PIC_MODEL_STATIC) {
@ -298,10 +314,16 @@ ld_plugin_status all_symbols_read_hook(void) {
I->syms[i].resolution == LDPR_RESOLVED_IR)) { I->syms[i].resolution == LDPR_RESOLVED_IR)) {
lto_codegen_add_must_preserve_symbol(cg, I->syms[i].name); lto_codegen_add_must_preserve_symbol(cg, I->syms[i].name);
anySymbolsPreserved = true; anySymbolsPreserved = true;
if (generate_api_file)
api_file << I->syms[i].name << "\n";
} }
} }
} }
if (generate_api_file)
api_file.close();
if (!anySymbolsPreserved) { if (!anySymbolsPreserved) {
// This entire file is unnecessary! // This entire file is unnecessary!
lto_codegen_dispose(cg); lto_codegen_dispose(cg);