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llvm-project/llvm/test/Instrumentation/AddressSanitizer/debug_info_noninstrumented_...

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[asan] Fix invalid debug info for promotable allocas Since r230724 ("Skip promotable allocas to improve performance at -O0"), there is a regression in the generated debug info for those non-instrumented variables. When inspecting such a variable's value in LLDB, you often get garbage instead of the actual value. ASan instrumentation is inserted before the creation of the non-instrumented alloca. The only allocas that are considered standard stack variables are the ones declared in the first basic-block, but the initial instrumentation setup in the function breaks that invariant. This patch makes sure uninstrumented allocas stay in the first BB. Differential Revision: http://reviews.llvm.org/D11179 llvm-svn: 242510
2015-07-17 14:29:57 +08:00
; This test checks that non-instrumented allocas stay in the first basic block.
; Only first-basic-block allocas are considered stack slots, and moving them
; breaks debug info.
; RUN: opt < %s -asan -asan-module -S | FileCheck %s
[ASan] Minor fixes to dynamic allocas handling: * Don't instrument promotable dynamic allocas: We already have a test that checks that promotable dynamic allocas are ignored, as well as static promotable allocas. Make sure this test will still pass if/when we enable dynamic alloca instrumentation by default. * Handle lifetime intrinsics before handling dynamic allocas: lifetime intrinsics may refer to dynamic allocas, so we need to emit instrumentation before these dynamic allocas would be replaced. Differential Revision: http://reviews.llvm.org/D12704 llvm-svn: 251045
2015-10-23 03:51:59 +08:00
; RUN: opt < %s -asan -asan-module -asan-instrument-allocas=1 -S | FileCheck %s
[asan] Fix invalid debug info for promotable allocas Since r230724 ("Skip promotable allocas to improve performance at -O0"), there is a regression in the generated debug info for those non-instrumented variables. When inspecting such a variable's value in LLDB, you often get garbage instead of the actual value. ASan instrumentation is inserted before the creation of the non-instrumented alloca. The only allocas that are considered standard stack variables are the ones declared in the first basic-block, but the initial instrumentation setup in the function breaks that invariant. This patch makes sure uninstrumented allocas stay in the first BB. Differential Revision: http://reviews.llvm.org/D11179 llvm-svn: 242510
2015-07-17 14:29:57 +08:00
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.10.0"
define i32 @foo() sanitize_address {
entry:
[asan] Improve moving of non-instrumented allocas In r242510, non-instrumented allocas are now moved into the first basic block. This patch limits that to only move allocas that are present *after* the first instrumented one (i.e. only move allocas up). A testcase was updated to show behavior in these two cases. Without the patch, an alloca could be moved down, and could cause an invalid IR. Differential Revision: http://reviews.llvm.org/D11339 llvm-svn: 242883
2015-07-22 18:25:38 +08:00
; Won't be instrumented because of asan-skip-promotable-allocas.
%non_instrumented1 = alloca i32, align 4
[asan] Fix invalid debug info for promotable allocas Since r230724 ("Skip promotable allocas to improve performance at -O0"), there is a regression in the generated debug info for those non-instrumented variables. When inspecting such a variable's value in LLDB, you often get garbage instead of the actual value. ASan instrumentation is inserted before the creation of the non-instrumented alloca. The only allocas that are considered standard stack variables are the ones declared in the first basic-block, but the initial instrumentation setup in the function breaks that invariant. This patch makes sure uninstrumented allocas stay in the first BB. Differential Revision: http://reviews.llvm.org/D11179 llvm-svn: 242510
2015-07-17 14:29:57 +08:00
; Regular alloca, will get instrumented (forced by the ptrtoint below).
%instrumented = alloca i32, align 4
; Won't be instrumented because of asan-skip-promotable-allocas.
[asan] Improve moving of non-instrumented allocas In r242510, non-instrumented allocas are now moved into the first basic block. This patch limits that to only move allocas that are present *after* the first instrumented one (i.e. only move allocas up). A testcase was updated to show behavior in these two cases. Without the patch, an alloca could be moved down, and could cause an invalid IR. Differential Revision: http://reviews.llvm.org/D11339 llvm-svn: 242883
2015-07-22 18:25:38 +08:00
%non_instrumented2 = alloca i32, align 4
br label %bb0
bb0:
; Won't be instrumented because of asan-skip-promotable-allocas.
%non_instrumented3 = alloca i32, align 4
%ptr = ptrtoint i32* %instrumented to i32
br label %bb1
[asan] Fix invalid debug info for promotable allocas Since r230724 ("Skip promotable allocas to improve performance at -O0"), there is a regression in the generated debug info for those non-instrumented variables. When inspecting such a variable's value in LLDB, you often get garbage instead of the actual value. ASan instrumentation is inserted before the creation of the non-instrumented alloca. The only allocas that are considered standard stack variables are the ones declared in the first basic-block, but the initial instrumentation setup in the function breaks that invariant. This patch makes sure uninstrumented allocas stay in the first BB. Differential Revision: http://reviews.llvm.org/D11179 llvm-svn: 242510
2015-07-17 14:29:57 +08:00
[asan] Improve moving of non-instrumented allocas In r242510, non-instrumented allocas are now moved into the first basic block. This patch limits that to only move allocas that are present *after* the first instrumented one (i.e. only move allocas up). A testcase was updated to show behavior in these two cases. Without the patch, an alloca could be moved down, and could cause an invalid IR. Differential Revision: http://reviews.llvm.org/D11339 llvm-svn: 242883
2015-07-22 18:25:38 +08:00
bb1:
ret i32 %ptr
[asan] Fix invalid debug info for promotable allocas Since r230724 ("Skip promotable allocas to improve performance at -O0"), there is a regression in the generated debug info for those non-instrumented variables. When inspecting such a variable's value in LLDB, you often get garbage instead of the actual value. ASan instrumentation is inserted before the creation of the non-instrumented alloca. The only allocas that are considered standard stack variables are the ones declared in the first basic-block, but the initial instrumentation setup in the function breaks that invariant. This patch makes sure uninstrumented allocas stay in the first BB. Differential Revision: http://reviews.llvm.org/D11179 llvm-svn: 242510
2015-07-17 14:29:57 +08:00
}
; CHECK: entry:
[asan] Improve moving of non-instrumented allocas In r242510, non-instrumented allocas are now moved into the first basic block. This patch limits that to only move allocas that are present *after* the first instrumented one (i.e. only move allocas up). A testcase was updated to show behavior in these two cases. Without the patch, an alloca could be moved down, and could cause an invalid IR. Differential Revision: http://reviews.llvm.org/D11339 llvm-svn: 242883
2015-07-22 18:25:38 +08:00
; CHECK: %non_instrumented1 = alloca i32, align 4
; CHECK: %non_instrumented2 = alloca i32, align 4
[asan] Fix invalid debug info for promotable allocas Since r230724 ("Skip promotable allocas to improve performance at -O0"), there is a regression in the generated debug info for those non-instrumented variables. When inspecting such a variable's value in LLDB, you often get garbage instead of the actual value. ASan instrumentation is inserted before the creation of the non-instrumented alloca. The only allocas that are considered standard stack variables are the ones declared in the first basic-block, but the initial instrumentation setup in the function breaks that invariant. This patch makes sure uninstrumented allocas stay in the first BB. Differential Revision: http://reviews.llvm.org/D11179 llvm-svn: 242510
2015-07-17 14:29:57 +08:00
; CHECK: load i32, i32* @__asan_option_detect_stack_use_after_return
[asan] Improve moving of non-instrumented allocas In r242510, non-instrumented allocas are now moved into the first basic block. This patch limits that to only move allocas that are present *after* the first instrumented one (i.e. only move allocas up). A testcase was updated to show behavior in these two cases. Without the patch, an alloca could be moved down, and could cause an invalid IR. Differential Revision: http://reviews.llvm.org/D11339 llvm-svn: 242883
2015-07-22 18:25:38 +08:00
; CHECK: bb0:
; CHECK: %non_instrumented3 = alloca i32, align 4