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[Sanitizer][RISCV] Fix FastUnwindTest 

Fixes the `FastUnwindTest` unit test for RISC-V.
These changes reflect the different stack organization commonly used for
that architecture.

Differential Revision: https://reviews.llvm.org/D90574
This commit is contained in:
Luís Marques 2021-01-31 23:56:01 +00:00
parent 3203c96842
commit 68e5614b42
1 changed files with 12 additions and 4 deletions
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16
compiler-rt/lib/sanitizer_common/tests/sanitizer_stacktrace_test.cpp
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@ -32,6 +32,14 @@ class FastUnwindTest : public ::testing::Test {
uhwptr fake_top;
uhwptr fake_bottom;
BufferedStackTrace trace;
#if defined(__riscv)
const uptr kFpOffset = 4;
const uptr kBpOffset = 2;
#else
const uptr kFpOffset = 2;
const uptr kBpOffset = 0;
#endif
};
static uptr PC(uptr idx) {
@ -49,17 +57,17 @@ void FastUnwindTest::SetUp() {
// Fill an array of pointers with fake fp+retaddr pairs. Frame pointers have
// even indices.
for (uptr i = 0; i + 1 < fake_stack_size; i += 2) {
fake_stack[i] = (uptr)&fake_stack[i+2]; // fp
fake_stack[i] = (uptr)&fake_stack[i + kFpOffset]; // fp
fake_stack[i+1] = PC(i + 1); // retaddr
}
// Mark the last fp point back up to terminate the stack trace.
fake_stack[RoundDownTo(fake_stack_size - 1, 2)] = (uhwptr)&fake_stack[0];
// Top is two slots past the end because UnwindFast subtracts two.
fake_top = (uhwptr)&fake_stack[fake_stack_size + 2];
fake_top = (uhwptr)&fake_stack[fake_stack_size + kFpOffset];
// Bottom is one slot before the start because UnwindFast uses >.
fake_bottom = (uhwptr)mapping;
fake_bp = (uptr)&fake_stack[0];
fake_bp = (uptr)&fake_stack[kBpOffset];
start_pc = PC(0);
}
@ -120,7 +128,7 @@ TEST_F(FastUnwindTest, OneFrameStackTrace) {
trace.Unwind(start_pc, fake_bp, nullptr, true, 1);
EXPECT_EQ(1U, trace.size);
EXPECT_EQ(start_pc, trace.trace[0]);
EXPECT_EQ((uhwptr)&fake_stack[0], trace.top_frame_bp);
EXPECT_EQ((uhwptr)&fake_stack[kBpOffset], trace.top_frame_bp);
}
TEST_F(FastUnwindTest, ZeroFramesStackTrace) {