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/* Checks that BOLT correctly handles instrumentation of indirect calls
* including case with indirect calls in signals handlers.
*/
#include <signal.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
int foo(int x) { return x + 1; }
int bar(int (*fn)(int), int val) { return fn(val); }
void sigHandler(int signum) { bar(foo, 3); }
int main(int argc, char **argv) {
long long i;
pid_t pid, wpid;
int wstatus;
signal(SIGUSR1, sigHandler);
pid = fork();
if (pid) {
do {
kill(pid, SIGUSR1);
usleep(0);
wpid = waitpid(pid, &wstatus, WNOHANG);
} while (wpid == 0);
printf("[parent]\n");
} else {
for (i = 0; i < 100000; i++) {
bar(foo, i % 10);
}
printf("[child]\n");
}
return 0;
}
/*
REQUIRES: system-linux,bolt-runtime,lit-max-individual-test-time
RUN: %clang %cflags %s -o %t.exe -Wl,-q -pie -fpie
RUN: llvm-bolt %t.exe --instrument --instrumentation-file=%t.fdata \
RUN: --instrumentation-wait-forks=1 --conservative-instrumentation \
RUN: -o %t.instrumented_conservative
# Instrumented program needs to finish returning zero
RUN: %t.instrumented_conservative | FileCheck %s -check-prefix=CHECK-OUTPUT
RUN: llvm-bolt %t.exe --instrument --instrumentation-file=%t.fdata \
RUN: --instrumentation-wait-forks=1 \
RUN: -o %t.instrumented
# Instrumented program needs to finish returning zero
RUN: %t.instrumented | FileCheck %s -check-prefix=CHECK-OUTPUT
# Test that the instrumented data makes sense
RUN: llvm-bolt %t.exe -o %t.bolted --data %t.fdata \
RUN: --reorder-blocks=ext-tsp --reorder-functions=hfsort+ \
RUN: --print-only=interp --print-finalized
RUN: %t.bolted | FileCheck %s -check-prefix=CHECK-OUTPUT
CHECK-OUTPUT: [child]
CHECK-OUTPUT: [parent]
*/
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