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Unified Diff: runtime/bin/process_android.cc

Issue 2996803002: Add current rss and embedder name to Observatory (Closed)
Patch Set: Rebase and Merge Created 3 years, 4 months ago
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Index: runtime/bin/process_android.cc
diff --git a/runtime/bin/process_android.cc b/runtime/bin/process_android.cc
index 66fc280523091c99fa593a120e872a8b9738e42e..9b307f3ed6fa57367db774cc5be6bb100de90a8d 100644
--- a/runtime/bin/process_android.cc
+++ b/runtime/bin/process_android.cc
@@ -859,25 +859,27 @@ intptr_t Process::CurrentProcessId() {
return static_cast<intptr_t>(getpid());
}
+static void SaveErrorAndClose(FILE* file) {
+ int actual_errno = errno;
+ fclose(file);
+ errno = actual_errno;
+}
+
int64_t Process::CurrentRSS() {
// The second value in /proc/self/statm is the current RSS in pages.
- File* statm = File::Open("/proc/self/statm", File::kRead);
+ // It is not possible to use getrusage() because the interested fields are not
+ // implemented by the linux kernel.
+ FILE* statm = fopen("/proc/self/statm", "r");
if (statm == NULL) {
return -1;
}
- RefCntReleaseScope<File> releaser(statm);
- const intptr_t statm_length = 1 * KB;
- void* buffer = reinterpret_cast<void*>(Dart_ScopeAllocate(statm_length));
- const intptr_t statm_read = statm->Read(buffer, statm_length);
- if (statm_read <= 0) {
- return -1;
- }
int64_t current_rss_pages = 0;
- int matches = sscanf(reinterpret_cast<char*>(buffer), "%*s%" Pd64 "",
- &current_rss_pages);
+ int matches = fscanf(statm, "%*s%" Pd64 "", &current_rss_pages);
if (matches != 1) {
+ SaveErrorAndClose(statm);
return -1;
}
+ fclose(statm);
return current_rss_pages * getpagesize();
}
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