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Diffstat (limited to 'test/esan/TestCases/large-stack-linux.c')
-rw-r--r-- | test/esan/TestCases/large-stack-linux.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/test/esan/TestCases/large-stack-linux.c b/test/esan/TestCases/large-stack-linux.c new file mode 100644 index 000000000000..3e024fc4e900 --- /dev/null +++ b/test/esan/TestCases/large-stack-linux.c @@ -0,0 +1,74 @@ +// RUN: %clang_esan_wset -O0 %s -o %t 2>&1 +// RUN: %env_esan_opts="verbosity=1 record_snapshots=0" %run %t %t 2>&1 | FileCheck %s + +#include <assert.h> +#include <stdio.h> +#include <sys/mman.h> +#include <sys/resource.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <unistd.h> + +static void testChildStackLimit(rlim_t StackLimit, char *ToRun) { + int Res; + struct rlimit Limit; + Limit.rlim_cur = RLIM_INFINITY; + Limit.rlim_max = RLIM_INFINITY; + Res = setrlimit(RLIMIT_STACK, &Limit); + if (Res != 0) { + // Probably our environment had a large limit and we ourselves got + // re-execed and can no longer raise our limit. + // We have to bail and emulate the regular test. + // We'd prefer to have branches in our FileCheck output to ensure the + // initial program was re-execed but this is the best we can do for now. + fprintf(stderr, "in esan::initializeLibrary\n"); + fprintf(stderr, "==1234==The stack size limit is beyond the maximum supported.\n"); + fprintf(stderr, "Re-execing with a stack size below 1TB.\n"); + fprintf(stderr, "in esan::initializeLibrary\n"); + fprintf(stderr, "done\n"); + fprintf(stderr, "in esan::finalizeLibrary\n"); + return; + } + + pid_t Child = fork(); + assert(Child >= 0); + if (Child > 0) { + pid_t WaitRes = waitpid(Child, NULL, 0); + assert(WaitRes == Child); + } else { + char *Args[2]; + Args[0] = ToRun; + Args[1] = NULL; + Res = execv(ToRun, Args); + assert(0); // Should not be reached. + } +} + +int main(int argc, char *argv[]) { + // The path to the program to exec must be passed in the first time. + if (argc == 2) { + fprintf(stderr, "Testing child with infinite stack\n"); + testChildStackLimit(RLIM_INFINITY, argv[1]); + fprintf(stderr, "Testing child with 1TB stack\n"); + testChildStackLimit(1ULL << 40, argv[1]); + } + fprintf(stderr, "done\n"); + // CHECK: in esan::initializeLibrary + // CHECK: Testing child with infinite stack + // CHECK-NEXT: in esan::initializeLibrary + // CHECK-NEXT: =={{[0-9]+}}==The stack size limit is beyond the maximum supported. + // CHECK-NEXT: Re-execing with a stack size below 1TB. + // CHECK-NEXT: in esan::initializeLibrary + // CHECK: done + // CHECK: in esan::finalizeLibrary + // CHECK: Testing child with 1TB stack + // CHECK-NEXT: in esan::initializeLibrary + // CHECK-NEXT: =={{[0-9]+}}==The stack size limit is beyond the maximum supported. + // CHECK-NEXT: Re-execing with a stack size below 1TB. + // CHECK-NEXT: in esan::initializeLibrary + // CHECK: done + // CHECK-NEXT: in esan::finalizeLibrary + // CHECK: done + // CHECK-NEXT: in esan::finalizeLibrary + return 0; +} |