Index: compiler-rt/trunk/lib/sanitizer_common/sanitizer_common.h =================================================================== --- compiler-rt/trunk/lib/sanitizer_common/sanitizer_common.h +++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_common.h @@ -730,6 +730,7 @@ ListOfModules() : initialized(false) {} ~ListOfModules() { clear(); } void init(); + void fallbackInit(); // Uses fallback init if available, otherwise clears const LoadedModule *begin() const { return modules_.begin(); } LoadedModule *begin() { return modules_.begin(); } const LoadedModule *end() const { return modules_.end(); } Index: compiler-rt/trunk/lib/sanitizer_common/sanitizer_linux_libcdep.cc =================================================================== --- compiler-rt/trunk/lib/sanitizer_common/sanitizer_linux_libcdep.cc +++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_linux_libcdep.cc @@ -488,6 +488,17 @@ } } +// When a custom loader is used, dl_iterate_phdr may not contain the full +// list of modules. Allow callers to fall back to using procmaps. +void ListOfModules::fallbackInit() { + if (!requiresProcmaps()) { + clearOrInit(); + procmapsInit(&modules_); + } else { + clear(); + } +} + // getrusage does not give us the current RSS, only the max RSS. // Still, this is better than nothing if /proc/self/statm is not available // for some reason, e.g. due to a sandbox. Index: compiler-rt/trunk/lib/sanitizer_common/sanitizer_mac.cc =================================================================== --- compiler-rt/trunk/lib/sanitizer_common/sanitizer_mac.cc +++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_mac.cc @@ -416,6 +416,8 @@ memory_mapping.DumpListOfModules(&modules_); } +void ListOfModules::fallbackInit() { clear(); } + static HandleSignalMode GetHandleSignalModeImpl(int signum) { switch (signum) { case SIGABRT: Index: compiler-rt/trunk/lib/sanitizer_common/sanitizer_symbolizer.h =================================================================== --- compiler-rt/trunk/lib/sanitizer_common/sanitizer_symbolizer.h +++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_symbolizer.h @@ -152,6 +152,7 @@ uptr *module_offset, ModuleArch *module_arch); ListOfModules modules_; + ListOfModules fallback_modules_; // If stale, need to reload the modules before looking up addresses. bool modules_fresh_; Index: compiler-rt/trunk/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cc =================================================================== --- compiler-rt/trunk/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cc +++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cc @@ -165,6 +165,7 @@ void Symbolizer::RefreshModules() { modules_.init(); + fallback_modules_.fallbackInit(); RAW_CHECK(modules_.size() > 0); modules_fresh_ = true; } @@ -198,6 +199,10 @@ if (module) return module; } #endif + + if (fallback_modules_.size()) { + module = SearchForModule(fallback_modules_, address); + } return module; } Index: compiler-rt/trunk/lib/sanitizer_common/sanitizer_win.cc =================================================================== --- compiler-rt/trunk/lib/sanitizer_common/sanitizer_win.cc +++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_win.cc @@ -583,7 +583,9 @@ modules_.push_back(cur_module); } UnmapOrDie(hmodules, modules_buffer_size); -}; +} + +void ListOfModules::fallbackInit() { clear(); } // We can't use atexit() directly at __asan_init time as the CRT is not fully // initialized at this point. Place the functions into a vector and use