3d4bba302d
See RFC for background: http://lists.llvm.org/pipermail/llvm-dev/2020-June/142744.html Follow on companion to the clang/llvm instrumentation support in D85948 and committed earlier. This patch adds the compiler-rt runtime support for the memory profiling. Note that much of this support was cloned from asan (and then greatly simplified and renamed). For example the interactions with the sanitizer_common allocators, error handling, interception, etc. The bulk of the memory profiling specific code can be found in the MemInfoBlock, MemInfoBlockCache, and related classes defined and used in memprof_allocator.cpp. For now, the memory profile is dumped to text (stderr by default, but honors the sanitizer_common log_path flag). It is dumped in either a default verbose format, or an optional terse format. This patch also adds a set of tests for the core functionality. Differential Revision: https://reviews.llvm.org/D87120
43 lines
1.5 KiB
C++
43 lines
1.5 KiB
C++
// Check profile with a single new call and set of loads and stores. Ensures
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// we get the same profile regardless of whether the memory is deallocated
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// before exit.
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// RUN: %clangxx_memprof -O0 %s -o %t
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// RUN: %env_memprof_opts= %run %t 2>&1 | FileCheck %s
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// RUN: %clangxx_memprof -DFREE -O0 %s -o %t
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// RUN: %env_memprof_opts= %run %t 2>&1 | FileCheck %s
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// Try again with callbacks instead of inline sequences
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// RUN: %clangxx_memprof -mllvm -memprof-use-callbacks -O0 %s -o %t
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// RUN: %env_memprof_opts= %run %t 2>&1 | FileCheck %s
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// This is actually:
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// Memory allocation stack id = STACKID
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// alloc_count 1, size (ave/min/max) 40.00 / 40 / 40
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// but we need to look for them in the same CHECK to get the correct STACKID.
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// CHECK: Memory allocation stack id = [[STACKID:[0-9]+]]{{[[:space:]].*}}alloc_count 1, size (ave/min/max) 40.00 / 40 / 40
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// CHECK-NEXT: access_count (ave/min/max): 20.00 / 20 / 20
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// CHECK-NEXT: lifetime (ave/min/max): [[AVELIFETIME:[0-9]+]].00 / [[AVELIFETIME]] / [[AVELIFETIME]]
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// CHECK-NEXT: num migrated: 0, num lifetime overlaps: 0, num same alloc cpu: 0, num same dealloc_cpu: 0
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// CHECK: Stack for id [[STACKID]]:
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// CHECK-NEXT: #0 {{.*}} in operator new
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// CHECK-NEXT: #1 {{.*}} in main {{.*}}:[[@LINE+6]]
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#include <stdio.h>
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#include <stdlib.h>
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int main() {
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int *p = new int[10];
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for (int i = 0; i < 10; i++)
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p[i] = i;
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int j = 0;
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for (int i = 0; i < 10; i++)
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j += p[i];
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#ifdef FREE
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delete p;
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#endif
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return 0;
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}
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