Revert^2: InMemoryDexClassLoader in ClassLoaderContext follow-up
Address follow-up comments on Ic64065819018a1e56dee0f65405d26beb8fd7bbd.
In particular, the classpath elements of IMC are replaced with
"<unknown>" magic value to make it clear that the dex location is bogus,
and a clarifying comment is added.
Previously this CL would fail on target because IMC classpath was not
being replaced with "<unknown>" and context matching failed. This was
only a problem on target because
OatFile::ResolveRelativeEncodedDexLocation ignores non-absolute
locations on host.
This reverts commit 93d99f3665cbd890509f4c707e1a62c5f26d320e.
Test: m test-art-gtest-class_loader_context_test
Bug: 72131483
Change-Id: I27cbfa69c24d412cc1b6bcce88218cc95e324ef5
diff --git a/runtime/class_loader_context.cc b/runtime/class_loader_context.cc
index 428bf30..2b62d59 100644
--- a/runtime/class_loader_context.cc
+++ b/runtime/class_loader_context.cc
@@ -54,6 +54,7 @@
static constexpr char kClassLoaderSeparator = ';';
static constexpr char kClasspathSeparator = ':';
static constexpr char kDexFileChecksumSeparator = '*';
+static constexpr char kInMemoryDexClassLoaderDexLocationMagic[] = "<unknown>";
ClassLoaderContext::ClassLoaderContext()
: special_shared_library_(false),
@@ -170,6 +171,8 @@
// Checksums are not provided and dex locations themselves have no meaning
// (although we keep them in the spec to simplify parsing). Treat this as
// an unknown class loader.
+ // We can hit this case if dex2oat is invoked with a spec containing IMC.
+ // Because the dex file data is only available at runtime, we cannot proceed.
return nullptr;
}
}
@@ -198,6 +201,7 @@
std::unique_ptr<ClassLoaderInfo> info(new ClassLoaderInfo(class_loader_type));
if (!parse_checksums) {
+ DCHECK(class_loader_type != kInMemoryDexClassLoader);
Split(classpath, kClasspathSeparator, &info->classpath);
} else {
std::vector<std::string> classpath_elements;
@@ -212,6 +216,10 @@
if (!android::base::ParseUint(dex_file_with_checksum[1].c_str(), &checksum)) {
return nullptr;
}
+ if ((class_loader_type == kInMemoryDexClassLoader) &&
+ (dex_file_with_checksum[0] != kInMemoryDexClassLoaderDexLocationMagic)) {
+ return nullptr;
+ }
info->classpath.push_back(dex_file_with_checksum[0]);
info->checksums.push_back(checksum);
@@ -417,6 +425,8 @@
while (!work_list.empty()) {
ClassLoaderInfo* info = work_list.back();
work_list.pop_back();
+ DCHECK(info->type != kInMemoryDexClassLoader) << __FUNCTION__ << " not supported for IMC";
+
size_t opened_dex_files_index = info->opened_dex_files.size();
for (const std::string& cp_elem : info->classpath) {
// If path is relative, append it to the provided base directory.
@@ -625,8 +635,10 @@
if (k > 0) {
out << kClasspathSeparator;
}
- // Find paths that were relative and convert them back from absolute.
- if (!base_dir.empty() && location.substr(0, base_dir.length()) == base_dir) {
+ if (info.type == kInMemoryDexClassLoader) {
+ out << kInMemoryDexClassLoaderDexLocationMagic;
+ } else if (!base_dir.empty() && location.substr(0, base_dir.length()) == base_dir) {
+ // Find paths that were relative and convert them back from absolute.
out << location.substr(base_dir.length() + 1).c_str();
} else {
out << location.c_str();
@@ -1051,7 +1063,11 @@
// Now that `info` is in the chain, populate dex files.
for (const DexFile* dex_file : dex_files_loaded) {
- info->classpath.push_back(dex_file->GetLocation());
+ // Dex location of dex files loaded with InMemoryDexClassLoader is always bogus.
+ // Use a magic value for the classpath instead.
+ info->classpath.push_back((type == kInMemoryDexClassLoader)
+ ? kInMemoryDexClassLoaderDexLocationMagic
+ : dex_file->GetLocation());
info->checksums.push_back(dex_file->GetLocationChecksum());
info->opened_dex_files.emplace_back(dex_file);
}