[arm64+AOT+LLVM] P/Invoke issues with functions with 10 or more parameters #11627
Description
From @mathbourgeois on November 8, 2018 3:51
When using the following C function in a p/invoke project from C#, the results after the 9th variable are garbage if you run in ARM64+AOT+LLVM mode only.
C#
[DllImport("StaticLibrary1")]
private static extern void functionWithParams20(int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m, int n, int o, int p, int q, int r, int s, int t);
...
functionWithParams20(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19);
functionWithParams20(19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0);
C++
void functionWithParams20(int a, int b, int c, int d, int e, int f, int g, int h, int i, int j,
int k, int l, int m, int n, int o, int p, int q, int r, int s, int t)
{
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of a is %d", a);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of b is %d", b);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of c is %d", c);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of d is %d", d);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of e is %d", e);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of f is %d", f);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of g is %d", g);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of h is %d", h);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of i is %d", i);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of j is %d", j);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of k is %d", k);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of l is %d", l);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of m is %d", m);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of n is %d", n);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of o is %d", o);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of p is %d", p);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of q is %d", q);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of r is %d", r);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of s is %d", s);
__android_log_print(ANDROID_LOG_ERROR, "USELESS", "The value of t is %d", t);
}
Steps to Reproduce
You can use the following test project, containing Xamarin.Android C# app and C++ android library containing 3 functions to be p/invoke-d (only the 20-int version actually breaking)
- Build and run the application in arm64-v8a (Release|ARM64)
- Check resulting logs
- Notice the p/invoke logs contain garbage
Expected Behavior
Proper results
11-07 22:33:00.487 30493 30493 E USELESS : The value of a is 0
11-07 22:33:00.487 30493 30493 E USELESS : The value of b is 1
11-07 22:33:00.487 30493 30493 E USELESS : The value of c is 2
11-07 22:33:00.487 30493 30493 E USELESS : The value of d is 3
11-07 22:33:00.487 30493 30493 E USELESS : The value of e is 4
11-07 22:33:00.487 30493 30493 E USELESS : The value of f is 5
11-07 22:33:00.487 30493 30493 E USELESS : The value of g is 6
11-07 22:33:00.487 30493 30493 E USELESS : The value of h is 7
11-07 22:33:00.487 30493 30493 E USELESS : The value of i is 8
11-07 22:33:00.487 30493 30493 E USELESS : The value of j is 9
11-07 22:33:00.487 30493 30493 E USELESS : The value of k is 10
11-07 22:33:00.487 30493 30493 E USELESS : The value of l is 11
11-07 22:33:00.487 30493 30493 E USELESS : The value of m is 12
11-07 22:33:00.487 30493 30493 E USELESS : The value of n is 13
11-07 22:33:00.487 30493 30493 E USELESS : The value of o is 14
11-07 22:33:00.487 30493 30493 E USELESS : The value of p is 15
11-07 22:33:00.487 30493 30493 E USELESS : The value of q is 16
11-07 22:33:00.487 30493 30493 E USELESS : The value of r is 17
11-07 22:33:00.487 30493 30493 E USELESS : The value of s is 18
11-07 22:33:00.487 30493 30493 E USELESS : The value of t is 19
11-07 22:33:00.487 30493 30493 E USELESS : The value of a is 19
11-07 22:33:00.487 30493 30493 E USELESS : The value of b is 18
11-07 22:33:00.487 30493 30493 E USELESS : The value of c is 17
11-07 22:33:00.487 30493 30493 E USELESS : The value of d is 16
11-07 22:33:00.487 30493 30493 E USELESS : The value of e is 15
11-07 22:33:00.487 30493 30493 E USELESS : The value of f is 14
11-07 22:33:00.487 30493 30493 E USELESS : The value of g is 13
11-07 22:33:00.487 30493 30493 E USELESS : The value of h is 12
11-07 22:33:00.487 30493 30493 E USELESS : The value of i is 11
11-07 22:33:00.487 30493 30493 E USELESS : The value of j is 10
11-07 22:33:00.487 30493 30493 E USELESS : The value of k is 9
11-07 22:33:00.487 30493 30493 E USELESS : The value of l is 8
11-07 22:33:00.487 30493 30493 E USELESS : The value of m is 7
11-07 22:33:00.487 30493 30493 E USELESS : The value of n is 6
11-07 22:33:00.487 30493 30493 E USELESS : The value of o is 5
11-07 22:33:00.487 30493 30493 E USELESS : The value of p is 4
11-07 22:33:00.487 30493 30493 E USELESS : The value of q is 3
11-07 22:33:00.487 30493 30493 E USELESS : The value of r is 2
11-07 22:33:00.487 30493 30493 E USELESS : The value of s is 1
11-07 22:33:00.487 30493 30493 E USELESS : The value of t is 0
Actual Behavior
11-07 22:22:49.689 29199 29199 E USELESS : The value of a is 0
11-07 22:22:49.689 29199 29199 E USELESS : The value of b is 1
11-07 22:22:49.689 29199 29199 E USELESS : The value of c is 2
11-07 22:22:49.689 29199 29199 E USELESS : The value of d is 3
11-07 22:22:49.689 29199 29199 E USELESS : The value of e is 4
11-07 22:22:49.689 29199 29199 E USELESS : The value of f is 5
11-07 22:22:49.689 29199 29199 E USELESS : The value of g is 6
11-07 22:22:49.689 29199 29199 E USELESS : The value of h is 7
11-07 22:22:49.689 29199 29199 E USELESS : The value of i is 8
11-07 22:22:49.689 29199 29199 E USELESS : The value of j is 10
11-07 22:22:49.689 29199 29199 E USELESS : The value of k is 12
11-07 22:22:49.689 29199 29199 E USELESS : The value of l is 14
11-07 22:22:49.689 29199 29199 E USELESS : The value of m is 16
11-07 22:22:49.689 29199 29199 E USELESS : The value of n is 18
11-07 22:22:49.689 29199 29199 E USELESS : The value of o is 0
11-07 22:22:49.689 29199 29199 E USELESS : The value of p is 2
11-07 22:22:49.689 29199 29199 E USELESS : The value of q is -1266594656
11-07 22:22:49.689 29199 29199 E USELESS : The value of r is 976037344
11-07 22:22:49.689 29199 29199 E USELESS : The value of s is 8
11-07 22:22:49.689 29199 29199 E USELESS : The value of t is -1621012387
11-07 22:22:49.689 29199 29199 E USELESS : The value of a is 19
11-07 22:22:49.689 29199 29199 E USELESS : The value of b is 18
11-07 22:22:49.689 29199 29199 E USELESS : The value of c is 17
11-07 22:22:49.689 29199 29199 E USELESS : The value of d is 16
11-07 22:22:49.689 29199 29199 E USELESS : The value of e is 15
11-07 22:22:49.689 29199 29199 E USELESS : The value of f is 14
11-07 22:22:49.689 29199 29199 E USELESS : The value of g is 13
11-07 22:22:49.689 29199 29199 E USELESS : The value of h is 12
11-07 22:22:49.689 29199 29199 E USELESS : The value of i is 11
11-07 22:22:49.689 29199 29199 E USELESS : The value of j is 9
11-07 22:22:49.689 29199 29199 E USELESS : The value of k is 7
11-07 22:22:49.689 29199 29199 E USELESS : The value of l is 5
11-07 22:22:49.689 29199 29199 E USELESS : The value of m is 3
11-07 22:22:49.689 29199 29199 E USELESS : The value of n is 1
11-07 22:22:49.689 29199 29199 E USELESS : The value of o is 0
11-07 22:22:49.689 29199 29199 E USELESS : The value of p is 2
11-07 22:22:49.689 29199 29199 E USELESS : The value of q is -1266594656
11-07 22:22:49.689 29199 29199 E USELESS : The value of r is 976037344
11-07 22:22:49.689 29199 29199 E USELESS : The value of s is 8
11-07 22:22:49.689 29199 29199 E USELESS : The value of t is -1621012387
Version Information
Microsoft Visual Studio Community 2017
Version 15.8.9
VisualStudio.15.Release/15.8.9+28010.2050
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Copied from original issue: dotnet/android#2406