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; RUN: llvm-profgen --format=text --perfscript=%S/Inputs/callback-external-addr.perfscript --binary=%S/Inputs/callback-external-addr.perfbin --output=%t --skip-symbolization
; RUN: FileCheck %s --input-file %t --check-prefix=CHECK-UNWINDER
; Test if call stack is correctly truncated.
; CHECK-UNWINDER-NOT: main:3 @ bar
; CHECK-UNWINDER-NOT: main:3 @ foo
; CHECK-UNWINDER-NOT: qux:3 @ baz
; CHECK-UNWINDER-NOT: qux:3 @ bar
; Test if return to wrong internal target
; CHECK-UNWINDER-NOT: baz:0 @ bar
; CHECK-UNWINDER-NOT: bar:0 @ baz
; CHECK-UNWINDER-NOT: baz:0 @ main
; CHECK-UNWINDER-NOT: bar:0 @ foo
; CHECK-UNWINDER-NOT: baz:0 @ qux
; Test for callback return from internal address to external address.
; [foo:2 @ qux:2 @ callBeforeReturn] and [foo:2 @ qux:4 @ callAfterReturn] should exist
; which means the callback return won't interrupt the previous call stack
; CHECK-UNWINDER: [bar]
; CHECK-UNWINDER: 1
; CHECK-UNWINDER: 690-69e:12
; CHECK-UNWINDER: 0
; CHECK-UNWINDER: [baz]
; CHECK-UNWINDER: 1
; CHECK-UNWINDER: 6a0-6ae:7
; CHECK-UNWINDER: 0
; CHECK-UNWINDER: [foo]
; CHECK-UNWINDER: 2
; CHECK-UNWINDER: 730-747:5
; CHECK-UNWINDER: 74c-751:5
; CHECK-UNWINDER: 1
; CHECK-UNWINDER: 747->6d0:5
; CHECK-UNWINDER: [foo:2 @ qux]
; CHECK-UNWINDER: 4
; CHECK-UNWINDER: 6d0-6e7:5
; CHECK-UNWINDER: 6ec-710:6
; CHECK-UNWINDER: 715-71b:7
; CHECK-UNWINDER: 720-72b:6
; CHECK-UNWINDER: 3
; CHECK-UNWINDER: 6e7->6b0:6
; CHECK-UNWINDER: 71b->6c0:7
; CHECK-UNWINDER: 72b->74c:6
; CHECK-UNWINDER: [foo:2 @ qux:2 @ callBeforeReturn]
; CHECK-UNWINDER: 1
; CHECK-UNWINDER: 6b0-6be:6
; CHECK-UNWINDER: 1
; CHECK-UNWINDER: 6be->6ec:7
; CHECK-UNWINDER: [foo:2 @ qux:4 @ callAfterReturn]
; CHECK-UNWINDER: 1
; CHECK-UNWINDER: 6c0-6ce:7
; CHECK-UNWINDER: 1
; CHECK-UNWINDER: 6ce->720:7
; CHECK-UNWINDER: [main]
; CHECK-UNWINDER: 2
; CHECK-UNWINDER: 77d-7ab:5
; CHECK-UNWINDER: 7b0-7bf:5
; CHECK-UNWINDER: 1
; CHECK-UNWINDER: 7bf->77d:5
; libcallback.c
; clang -shared -fPIC -o libcallback.so libcallback.c
int callback(int *cnt, int (*func1)(int), int (*func2)(int), int p) {
(*cnt)++;
return func1(p) + func2(p);
}
; test.c
; clang test.c -O0 -g -fno-optimize-sibling-calls -fdebug-info-for-profiling -L $PWD -lcallback -fno-inline
#include <stdio.h>
int callbackCnt = 0;
int callback(int *cnt, int (*func1)(int), int (*func2)(int), int p);
int bar(int p) {
return p + 1;
}
int baz(int p) {
return p - 1;
}
int callBeforeReturn(int p) {
return p + 10;
}
int callAfterReturn(int p) {
return p - 10;
}
int qux(int p) {
p += 10;
int ret = callBeforeReturn(p);
ret = callback(&callbackCnt, bar, baz, ret);
ret = callAfterReturn(ret);
return ret;
}
int foo (int p) {
p -= 10;
return qux(p);
}
int main(void) {
int sum = 0;
for (int i = 0; i < 1000 * 1000; i++) {
sum += callback(&callbackCnt, foo, bar, i);
}
printf("callback count=%d, sum=%d\n", callbackCnt, sum);
}
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