1f8031cd74
Some tests are broken at API level 30 on AOSP-master devices. When we change the buildbuit to API level 30, the following tests get enabled. They're currently broken due to various issues, and so fix up those issues. Reviewed By: oontvoo, eugenis Differential Revision: https://reviews.llvm.org/D94100
58 lines
2.1 KiB
C++
58 lines
2.1 KiB
C++
// Test that out-of-scope local variables are ignored by LSan.
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// RUN: LSAN_BASE="report_objects=1:use_registers=0:use_stacks=1"
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// LSan-in-ASan fails at -O0 on aarch64, because the stack use-after-return
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// instrumentation stashes the argument to `PutPointerOnStaleStack` on the stack
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// in order to conditionally call __asan_stack_malloc. This subverts our
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// expectations for this test, where we assume the pointer is never stashed
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// except at the bottom of the dead frame. Building at -O1 or greater solves
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// this problem, because the compiler is smart enough to stash the argument in a
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// callee-saved register for rematerialization instead.
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// RUN: %clangxx_lsan -O1 %s -o %t
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// RUN: %env_lsan_opts=$LSAN_BASE not %run %t 2>&1 | FileCheck %s
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// RUN: %env_lsan_opts=$LSAN_BASE":exitcode=0" %run %t 2>&1 | FileCheck --check-prefix=CHECK-sanity %s
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//
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// x86 passes parameters through stack that may lead to false negatives
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// The same applies to s390x register save areas.
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// UNSUPPORTED: x86,i686,powerpc64,arm,s390x
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#include <stdio.h>
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#include <stdlib.h>
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#include "sanitizer_common/print_address.h"
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void **pp;
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// Put pointer far enough on the stack that LSan has space to run in without
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// overwriting it.
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// Hopefully the argument p will be passed on a register, saving us from false
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// negatives.
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__attribute__((noinline))
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void *PutPointerOnStaleStack(void *p) {
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void *locals[2048];
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locals[0] = p;
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pp = &locals[0];
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print_address("Test alloc: ", 1, locals[0]);
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return 0;
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}
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int main() {
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PutPointerOnStaleStack(malloc(1337));
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return 0;
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}
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// This must run after LSan, to ensure LSan didn't overwrite the pointer before
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// it had a chance to see it. If LSan is invoked with atexit(), this works.
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// Otherwise, we need a different method.
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__attribute__((destructor))
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__attribute__((no_sanitize_address))
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void ConfirmPointerHasSurvived() {
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print_address("Value after LSan: ", 1, *pp);
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}
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// CHECK: Test alloc: [[ADDR:0x[0-9,a-f]+]]
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// CHECK-sanity: Test alloc: [[ADDR:0x[0-9,a-f]+]]
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// CHECK: LeakSanitizer: detected memory leaks
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// CHECK: [[ADDR]] (1337 bytes)
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// CHECK: SUMMARY: {{(Leak|Address)}}Sanitizer:
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// CHECK-sanity: Value after LSan: [[ADDR]]
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