Merge remote-tracking branch 'origin/master' into ios-profiling

apps/ios/Shared/SimpleXApp.swift

@@ -22,7 +22,11 @@ struct SimpleXApp: App {
 
     init() {
         DispatchQueue.global(qos: .background).sync {
-            haskell_init()
+            // we have to use debug profile file name without extension here because .hp extension is added by profiler
+            haskell_init(
+                getAppEventLogPath().path,
+                getAppDebugProfilePrefixPath().path
+            )
 //            hs_init(0, nil)
         }
         UserDefaults.standard.register(defaults: appDefaults)

apps/ios/Shared/Views/UserSettings/DeveloperView.swift

@@ -45,6 +45,11 @@ struct DeveloperView: View {
                 }
 
                 if developerTools {
+                    Section {
+                        exportDebugProfileButton()
+                        exportEventLogButton()
+                    }
+
                     Section {
                         settingsRow("key") {
                             Toggle("Post-quantum E2EE", isOn: $pqExperimentalEnabled)
@@ -62,6 +67,24 @@ struct DeveloperView: View {
         }
     }
 
+    @ViewBuilder private func exportDebugProfileButton() -> some View {
+        let url = getAppDebugProfilePath()
+        settingsRow("square.and.arrow.up") {
+            Button("Export debugging profile") {
+                showShareSheet(items: [url])
+            }
+        }.disabled(!FileManager.default.fileExists(atPath: url.path))
+    }
+
+    @ViewBuilder private func exportEventLogButton() -> some View {
+        let url = getAppEventLogPath()
+        settingsRow("square.and.arrow.up") {
+            Button("Export event log") {
+                showShareSheet(items: [url])
+            }
+        }.disabled(!FileManager.default.fileExists(atPath: url.path))
+    }
+
     private func setPQExperimentalEnabled(_ enable: Bool) {
         do {
             try apiSetPQEncryption(enable)

apps/ios/SimpleXChat/FileUtils.swift

@@ -52,6 +52,10 @@ func getAppDirectory() -> URL {
 
 let DB_FILE_PREFIX = "simplex_v1"
 
+let DEBUG_PROFILE_PREFIX = "simplex_debug"
+
+let DEBUG_PROFILE_EXTENSION = ".hp"
+
 func getLegacyDatabasePath() -> URL {
     getDocumentsDirectory().appendingPathComponent("mobile_v1", isDirectory: false)
 }
@@ -62,6 +66,18 @@ public func getAppDatabasePath() -> URL {
     : getLegacyDatabasePath()
 }
 
+public func getAppDebugProfilePrefixPath() -> URL {
+    getAppDirectory().appendingPathComponent(DEBUG_PROFILE_PREFIX, isDirectory: false)
+}
+
+public func getAppDebugProfilePath() -> URL {
+    getAppDirectory().appendingPathComponent(DEBUG_PROFILE_PREFIX + DEBUG_PROFILE_EXTENSION, isDirectory: false)
+}
+
+public func getAppEventLogPath() -> URL {
+    getAppDirectory().appendingPathComponent("simplex.eventlog", isDirectory: false)
+}
+
 func fileModificationDate(_ path: String) -> Date? {
     do {
         let attr = try FileManager.default.attributesOfItem(atPath: path)

apps/ios/SimpleXChat/hs_init.c

@@ -7,19 +7,36 @@
 //
 
 #include "hs_init.h"
+#include <string.h>
 
 extern void hs_init_with_rtsopts(int * argc, char **argv[]);
 
-void haskell_init(void) {
+void haskell_init(const char *eventlog, const char *heap_profile) {
-    int argc = 5;
+    // setup static arena for bump allocation and passing to RTS
-    char *argv[] = {
+    char *argv[32] = {0,};
-        "simplex",
+    int argc = 0; // number of arguments used so far, always stands at the first NULL in argv
-        "+RTS", // requires `hs_init_with_rtsopts`
+    // common args
-        "-A64m", // chunk size for new allocations
+    argv[argc++] = "simplex"; // fake program name
-        "-H64m", // initial heap size
+    argv[argc++] = "+RTS"; // start adding RTS options
-        "-xn", // non-moving GC
+    argv[argc++] = "-T"; // make GC counters available from inside the program
-        0
+    argv[argc++] = "-A64m"; // chunk size for new allocations (less frequent GC)
-    };
+    argv[argc++] = "-H64m"; // larger heap size on start (faster boot)
+    // argv[argc++] = "-M8G"; // keep memory usage under 8G, collecting more aggressively when approaching it (and crashing sooner rather than taking down the whole system)
+    if (eventlog) {
+        static char ol[1024] = "-ol";
+        (void)strncpy(&ol[3], eventlog, sizeof(ol) - 3);
+        argv[argc++] = ol;
+        argv[argc++] = "-l-agu"; // collect GC and user events
+    }
+    if (heap_profile) {
+        static char po[1024] = "-po";
+        (void)strncpy(&po[3], heap_profile, sizeof(po) - 3);
+        argv[argc++] = po; // adds ".hp" extension
+        argv[argc++] = "-hT"; // emit heap profile by closure type
+    }
+    int non_moving_gc = !heap_profile; // not compatible with heap profile
+    if (non_moving_gc) argv[argc++] = "-xn";
+    // wrap args as expected by RTS
     char **pargv = argv;
     hs_init_with_rtsopts(&argc, &pargv);
 }

apps/ios/SimpleXChat/hs_init.h

@@ -9,7 +9,7 @@
 #ifndef hs_init_h
 #define hs_init_h
 
-void haskell_init(void);
+void haskell_init(const char *eventlog, const char *heap_profile);
 
 void haskell_init_nse(void);