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DynamicLinks: Skip retrieving web locale when running targeting below iOS14 (only on simulator & Apple Silicon) #7989

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Merged
merged 6 commits into from
Apr 28, 2021
Merged

DynamicLinks: Skip retrieving web locale when running targeting below iOS14 (only on simulator & Apple Silicon) #7989

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14018e4
Conditionally make WebKit allocations
ncooke3 Apr 20, 2021
ae8dbac
Clean up approach
ncooke3 Apr 27, 2021
9f3322f
Style
ncooke3 Apr 27, 2021
fa0bb8a
Still call delegate method
ncooke3 Apr 27, 2021
5e69c0b
Make C function static
ncooke3 Apr 27, 2021
2269c59
Updated CHANGELOG
ncooke3 Apr 28, 2021
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3 changes: 3 additions & 0 deletions FirebaseDynamicLinks/CHANGELOG.md
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Original file line number Diff line number Diff line change
@@ -1,3 +1,6 @@
# v8.0.0
- [fixed] Fixed crashes on simulators targeting below iOS14 on Apple Silicon. (#7989)

# v7.7.0
- [added] Added `utmParametersDictionary` property to `DynamicLink`. (#6730)

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30 changes: 30 additions & 0 deletions FirebaseDynamicLinks/Sources/FIRDLJavaScriptExecutor.m
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,8 @@
#import <TargetConditionals.h>
#if TARGET_OS_IOS

#import <sys/sysctl.h>

#import <WebKit/WebKit.h>

#import "FirebaseDynamicLinks/Sources/FIRDLJavaScriptExecutor.h"
Expand Down Expand Up @@ -73,6 +75,19 @@ - (instancetype)initWithDelegate:(id<FIRDLJavaScriptExecutorDelegate>)delegate

#pragma mark - Internal methods
- (void)start {
// Initializing a `WKWebView` causes a memory allocation error when the process
// is running under Rosetta translation on Apple Silicon.
// The issue only occurs on the simulator in apps targeting below iOS 14. (Issue #7618)
#if TARGET_OS_SIMULATOR
BOOL systemVersionAtLeastiOS14 = [NSProcessInfo.processInfo
isOperatingSystemAtLeastVersion:(NSOperatingSystemVersion){14, 0, 0}];
// Perform an early exit if the process is running under Rosetta translation and targeting
// under iOS 14.
if (processIsTranslated() && !systemVersionAtLeastiOS14) {
[self handleExecutionError:nil];
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@ncooke3 ncooke3 Apr 27, 2021

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Calling the delegate method in the early exit case avoids interrupting the dynamic links flow and the locale property in the delegate will be set to empty string. See here

return;
}
#endif
NSString *htmlContent =
[NSString stringWithFormat:@"<html><head><script>%@</script></head></html>", _script];

Expand Down Expand Up @@ -135,6 +150,21 @@ - (void)webView:(WKWebView *)webView
[self handleExecutionError:error];
}

// Determine whether a process is running under Rosetta translation.
// Returns 0 for a native process, 1 for a translated process,
// and -1 when an error occurs.
// From:
// https://developer.apple.com/documentation/apple-silicon/about-the-rosetta-translation-environment
static int processIsTranslated() {
int ret = 0;
size_t size = sizeof(ret);
if (sysctlbyname("sysctl.proc_translated", &ret, &size, NULL, 0) == -1) {
if (errno == ENOENT) return 0;
return -1;
}
return ret;
}

@end

NS_ASSUME_NONNULL_END
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