0949f96dc6
Similar to -fprofile-generate=, add -fmemory-profile= which takes a directory path. This is passed down to LLVM via a new module flag metadata. LLVM in turn provides this name to the runtime via the new __memprof_profile_filename variable. Additionally, always pass a default filename (in $cwd if a directory name is not specified vi the = form of the option). This is also consistent with the behavior of the PGO instrumentation. Since the memory profiles will generally be fairly large, it doesn't make sense to dump them to stderr. Also, importantly, the memory profiles will eventually be dumped in a compact binary format, which is another reason why it does not make sense to send these to stderr by default. Change the existing memprof tests to specify log_path=stderr when that was being relied on. Depends on D89086. Differential Revision: https://reviews.llvm.org/D89087
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=log_path=stderr %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=log_path=stderr %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=log_path=stderr %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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