Changeset View
Changeset View
Standalone View
Standalone View
lld/ELF/Driver.cpp
| Show First 20 Lines • Show All 2,190 Lines • ▼ Show 20 Lines | Symbol *wrap = | ||||
| addUnusedUndefined(saver().save("__wrap_" + name), sym->binding); | addUnusedUndefined(saver().save("__wrap_" + name), sym->binding); | ||||
| v.push_back({sym, real, wrap}); | v.push_back({sym, real, wrap}); | ||||
| // We want to tell LTO not to inline symbols to be overwritten | // We want to tell LTO not to inline symbols to be overwritten | ||||
| // because LTO doesn't know the final symbol contents after renaming. | // because LTO doesn't know the final symbol contents after renaming. | ||||
| real->scriptDefined = true; | real->scriptDefined = true; | ||||
| sym->scriptDefined = true; | sym->scriptDefined = true; | ||||
| // Tell LTO not to eliminate these symbols. | // If a symbol is referenced in any object file, bitcode file or shared | ||||
| sym->isUsedInRegularObj = true; | // object, mark its redirection target (foo for __real_foo and __wrap_foo | ||||
| // If sym is referenced in any object file, bitcode file or shared object, | // for foo) as referenced after redirection, which will be used to tell LTO | ||||
| // retain wrap which is the redirection target of sym. If the object file | // to not eliminate the redirection target. If the object file defining the | ||||
| // defining sym has sym references, we cannot easily distinguish the case | // symbol also references it, we cannot easily distinguish the case from | ||||
| // from cases where sym is not referenced. Retain wrap because we choose to | // cases where the symbol is not referenced. Retain the redirection target | ||||
| // wrap sym references regardless of whether sym is defined | // in this case because we choose to wrap symbol references regardless of | ||||
| // whether the symbol is defined | |||||
| // (https://sourceware.org/bugzilla/show_bug.cgi?id=26358). | // (https://sourceware.org/bugzilla/show_bug.cgi?id=26358). | ||||
| if (real->referenced || real->isDefined()) | |||||
| sym->referencedAfterWrap = true; | |||||
| if (sym->referenced || sym->isDefined()) | if (sym->referenced || sym->isDefined()) | ||||
| wrap->isUsedInRegularObj = true; | wrap->referencedAfterWrap = true; | ||||
| } | } | ||||
| return v; | return v; | ||||
| } | } | ||||
| // Do renaming for --wrap and foo@v1 by updating pointers to symbols. | // Do renaming for --wrap and foo@v1 by updating pointers to symbols. | ||||
| // | // | ||||
| // When this function is executed, only InputFiles and symbol table | // When this function is executed, only InputFiles and symbol table | ||||
| // contain pointers to symbol objects. We visit them to replace pointers, | // contain pointers to symbol objects. We visit them to replace pointers, | ||||
| ▲ Show 20 Lines • Show All 551 Lines • Show Last 20 Lines | |||||