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58149dbd85
Summary: It was previously not possible for tools to use solely the stackmap information emitted to reconstruct the return addresses of callsites in the map, which is necessary to use the information to walk a stack. This patch adds per-function callsite counts when emitting the stackmap section in order to resolve the problem. Note that this slightly alters the stackmap format, so external tools parsing these maps will need to be updated. **Problem Details:** Records only store their offset from the beginning of the function they belong to. While these records and the functions are output in program order, it is not possible to determine where the end of one function's records are without the callsite count when processing the records to compute return addresses. Patch by Kavon Farvardin! Reviewers: atrick, ributzka, sanjoy Subscribers: nemanjai Differential Revision: https://reviews.llvm.org/D23487 llvm-svn: 281532
175 lines
6.6 KiB
Plaintext
175 lines
6.6 KiB
Plaintext
RUN: llvm-readobj -stackmap %p/Inputs/stackmap-test.macho-x86-64 | FileCheck %s
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; Note: the macho object file in this test was generated in the following way:
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; llc -mtriple=x86_64-apple-darwin %p/test/CodeGen/X86/stackmap.ll -o stackmap.s
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; clang -c stackmap.s -o %p/test/Object/Inputs/stackmap-test.macho-x86-64
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CHECK: LLVM StackMap Version: 2
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CHECK-NEXT: Num Functions: 16
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CHECK-NEXT: Function address: 0, stack size: 8, callsite record count: 1
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CHECK-NEXT: Function address: 0, stack size: 24, callsite record count: 1
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CHECK-NEXT: Function address: 0, stack size: 8, callsite record count: 1
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CHECK-NEXT: Function address: 0, stack size: 8, callsite record count: 1
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CHECK-NEXT: Function address: 0, stack size: 8, callsite record count: 1
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CHECK-NEXT: Function address: 0, stack size: 8, callsite record count: 1
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CHECK-NEXT: Function address: 0, stack size: 8, callsite record count: 1
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CHECK-NEXT: Function address: 0, stack size: 56, callsite record count: 1
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CHECK-NEXT: Function address: 0, stack size: 56, callsite record count: 1
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CHECK-NEXT: Function address: 0, stack size: 56, callsite record count: 1
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CHECK-NEXT: Function address: 0, stack size: 56, callsite record count: 1
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CHECK-NEXT: Function address: 0, stack size: 8, callsite record count: 1
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CHECK-NEXT: Function address: 0, stack size: 56, callsite record count: 2
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CHECK-NEXT: Function address: 0, stack size: 8, callsite record count: 4
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CHECK-NEXT: Function address: 0, stack size: 56, callsite record count: 1
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CHECK-NEXT: Function address: 0, stack size: 18446744073709551615, callsite record count: 1
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CHECK-NEXT: Num Constants: 3
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CHECK-NEXT: #1: 2147483648
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CHECK-NEXT: #2: 4294967295
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CHECK-NEXT: #3: 4294967296
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CHECK-NEXT: Num Records: 20
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CHECK-NEXT: Record ID: 1, instruction offset: 4
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CHECK-NEXT: 12 locations:
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CHECK-NEXT: #1: Constant 4294967295
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CHECK-NEXT: #2: Constant 4294967295
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CHECK-NEXT: #3: Constant 65536
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CHECK-NEXT: #4: Constant 2000000000
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CHECK-NEXT: #5: Constant 2147483647
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CHECK-NEXT: #6: Constant 4294967295
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CHECK-NEXT: #7: Constant 4294967295
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CHECK-NEXT: #8: Constant 0
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CHECK-NEXT: #9: ConstantIndex #0 (2147483648)
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CHECK-NEXT: #10: ConstantIndex #1 (4294967295)
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CHECK-NEXT: #11: ConstantIndex #2 (4294967296)
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CHECK-NEXT: #12: Constant 4294967295
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CHECK-NEXT: 1 live-outs: [ R#7 (8-bytes) ]
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CHECK: Record ID: 3, instruction offset: 22
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CHECK-NEXT: 2 locations:
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CHECK-NEXT: #1: Register R#3
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CHECK-NEXT: #2: Register R#14
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CHECK-NEXT: 0 live-outs: [ ]
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CHECK: Record ID: 4, instruction offset: 10
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CHECK-NEXT: 2 locations:
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CHECK-NEXT: #1: Register R#5
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CHECK-NEXT: #2: Register R#4
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CHECK-NEXT: 0 live-outs: [ ]
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CHECK: Record ID: 5, instruction offset: 4
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CHECK-NEXT: 2 locations:
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CHECK-NEXT: #1: Register R#0
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CHECK-NEXT: #2: Register R#5
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CHECK-NEXT: 2 live-outs: [ R#0 (8-bytes) R#7 (8-bytes) ]
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CHECK: Record ID: 6, instruction offset: 4
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CHECK-NEXT: 2 locations:
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CHECK-NEXT: #1: Register R#4
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CHECK-NEXT: #2: Register R#2
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CHECK-NEXT: 1 live-outs: [ R#7 (8-bytes) ]
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CHECK: Record ID: 7, instruction offset: 10
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CHECK-NEXT: 2 locations:
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CHECK-NEXT: #1: Register R#2
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CHECK-NEXT: #2: Register R#8
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CHECK-NEXT: 1 live-outs: [ R#7 (8-bytes) ]
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CHECK: Record ID: 8, instruction offset: 10
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CHECK-NEXT: 2 locations:
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CHECK-NEXT: #1: Register R#2
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CHECK-NEXT: #2: Register R#8
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CHECK-NEXT: 2 live-outs: [ R#0 (8-bytes) R#7 (8-bytes) ]
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CHECK: Record ID: 11, instruction offset: 42
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CHECK-NEXT: 17 locations:
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CHECK-NEXT: #1: Register R#9
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CHECK-NEXT: #2: Register R#14
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CHECK-NEXT: #3: Register R#10
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CHECK-NEXT: #4: Register R#3
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CHECK-NEXT: #5: Register R#0
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CHECK-NEXT: #6: Register R#13
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CHECK-NEXT: #7: Register R#12
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CHECK-NEXT: #8: Register R#15
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CHECK-NEXT: #9: Indirect [R#6 + 72]
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CHECK-NEXT: #10: Indirect [R#6 + 80]
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CHECK-NEXT: #11: Indirect [R#6 + 88]
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CHECK-NEXT: #12: Indirect [R#6 + 96]
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CHECK-NEXT: #13: Indirect [R#6 + 104]
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CHECK-NEXT: #14: Indirect [R#6 + 112]
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CHECK-NEXT: #15: Indirect [R#6 + 120]
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CHECK-NEXT: #16: Indirect [R#6 + 128]
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CHECK-NEXT: #17: Indirect [R#6 + 136]
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CHECK-NEXT: 1 live-outs: [ R#7 (8-bytes) ]
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CHECK: Record ID: 12, instruction offset: 62
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CHECK-NEXT: 17 locations:
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CHECK-NEXT: #1: Register R#0
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CHECK-NEXT: #2: Register R#14
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CHECK-NEXT: #3: Register R#10
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CHECK-NEXT: #4: Register R#9
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CHECK-NEXT: #5: Register R#8
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CHECK-NEXT: #6: Register R#4
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CHECK-NEXT: #7: Register R#1
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CHECK-NEXT: #8: Register R#2
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CHECK-NEXT: #9: Register R#5
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CHECK-NEXT: #10: Register R#3
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CHECK-NEXT: #11: Register R#13
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CHECK-NEXT: #12: Register R#12
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CHECK-NEXT: #13: Register R#15
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CHECK-NEXT: #14: Indirect [R#6 + 112]
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CHECK-NEXT: #15: Indirect [R#6 + 120]
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CHECK-NEXT: #16: Indirect [R#6 + 128]
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CHECK-NEXT: #17: Indirect [R#6 + 136]
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CHECK-NEXT: 0 live-outs: [ ]
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CHECK: Record ID: 13, instruction offset: 50
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CHECK-NEXT: 1 locations:
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CHECK-NEXT: #1: Indirect [R#6 + -48]
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CHECK-NEXT: 0 live-outs: [ ]
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CHECK: Record ID: 14, instruction offset: 24
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CHECK-NEXT: 2 locations:
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CHECK-NEXT: #1: Register R#0
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CHECK-NEXT: #2: Register R#3
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CHECK-NEXT: 0 live-outs: [ ]
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CHECK: Record ID: 15, instruction offset: 4
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CHECK-NEXT: 1 locations:
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CHECK-NEXT: #1: Constant 33
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CHECK-NEXT: 0 live-outs: [ ]
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CHECK: Record ID: 16, instruction offset: 32
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CHECK-NEXT: 1 locations:
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CHECK-NEXT: #1: Direct R#6 + -32
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CHECK-NEXT: 0 live-outs: [ ]
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CHECK: Record ID: 17, instruction offset: 32
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CHECK-NEXT: 2 locations:
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CHECK-NEXT: #1: Direct R#6 + -8
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CHECK-NEXT: #2: Direct R#6 + -40
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CHECK-NEXT: 1 live-outs: [ R#7 (8-bytes) ]
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CHECK: Record ID: 4294967295, instruction offset: 4
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CHECK-NEXT: 0 locations:
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CHECK-NEXT: 0 live-outs: [ ]
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CHECK: Record ID: 4294967296, instruction offset: 4
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CHECK-NEXT: 0 locations:
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CHECK-NEXT: 0 live-outs: [ ]
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CHECK: Record ID: 9223372036854775807, instruction offset: 4
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CHECK-NEXT: 0 locations:
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CHECK-NEXT: 0 live-outs: [ ]
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CHECK: Record ID: 18446744073709551615, instruction offset: 4
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CHECK-NEXT: 0 locations:
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CHECK-NEXT: 1 live-outs: [ R#7 (8-bytes) ]
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CHECK: Record ID: 16, instruction offset: 18
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CHECK-NEXT: 1 locations:
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CHECK-NEXT: #1: Indirect [R#6 + -44]
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CHECK-NEXT: 0 live-outs: [ ]
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CHECK: Record ID: 0, instruction offset: 26
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CHECK-NEXT: 0 locations:
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CHECK-NEXT: 0 live-outs: [ ]
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