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Revert "[BOLT][Instrumentation] Don't share counters when using append-pid"

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This reverts commit 02c3724d43840339fdc91d21747e96b5f7405bb0.

This change breaks instrumented Clang:
https://lab.llvm.org/buildbot/#/builders/252/builds/2700
This commit is contained in:
Amir Ayupov 2023-06-29 19:54:29 -07:00
parent 4314f4ceb5
commit c15e9b6814
1 changed files with 7 additions and 11 deletions
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18
bolt/runtime/instr.cpp
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@ -1586,9 +1586,6 @@ extern "C" void __bolt_instr_indirect_tailcall();
/// Initialization code
extern "C" void __attribute((force_align_arg_pointer)) __bolt_instr_setup() {
__bolt_ind_call_counter_func_pointer = __bolt_instr_indirect_call;
__bolt_ind_tailcall_counter_func_pointer = __bolt_instr_indirect_tailcall;
const uint64_t CountersStart =
reinterpret_cast<uint64_t>(&__bolt_instr_locations[0]);
const uint64_t CountersEnd = alignTo(
@ -1596,19 +1593,18 @@ extern "C" void __attribute((force_align_arg_pointer)) __bolt_instr_setup() {
0x1000);
DEBUG(reportNumber("replace mmap start: ", CountersStart, 16));
DEBUG(reportNumber("replace mmap stop: ", CountersEnd, 16));
assert(CountersEnd > CountersStart, "no counters");
const bool Shared = !__bolt_instr_use_pid;
const uint64_t MapPrivateOrShared = Shared ? MAP_SHARED : MAP_PRIVATE;
assert (CountersEnd > CountersStart, "no counters");
// Maps our counters to be shared instead of private, so we keep counting for
// forked processes
void *Ret =
__mmap(CountersStart, CountersEnd - CountersStart, PROT_READ | PROT_WRITE,
MAP_ANONYMOUS | MapPrivateOrShared | MAP_FIXED, -1, 0);
MAP_ANONYMOUS | MAP_SHARED | MAP_FIXED, -1, 0);
assert(Ret != MAP_FAILED, "__bolt_instr_setup: Failed to mmap counters!");
__bolt_ind_call_counter_func_pointer = __bolt_instr_indirect_call;
__bolt_ind_tailcall_counter_func_pointer = __bolt_instr_indirect_tailcall;
// Conservatively reserve 100MiB shared pages
GlobalAlloc.setMaxSize(0x6400000);
GlobalAlloc.setShared(Shared);
GlobalAlloc.setShared(true);
GlobalWriteProfileMutex = new (GlobalAlloc, 0) Mutex();
if (__bolt_instr_num_ind_calls > 0)
GlobalIndCallCounters =