PT_TLS-overlap-PT_LOAD.yaml | Explore in Territory

# Overlapping PT_LOAD and PT_TLS segments in an object file should be able to
# exist side by side.

# When an ELF file contains both PT_LOAD and PT_TLS segments where the PT_TLS
# segment has the same p_vaddr and p_paddr as a PT_LOAD segment, this
# was causing LLDB, when loading a ELF object file at an address, to overwrite
# the section load address for a PT_LOAD that shares the same p_vaddr value in
# the section load list's addr to section map for this code. This test ensures
# that no PT_TLS segments get loaded and can't interfere with real segments we
# need to resolved as all access to thread specific memory is only done via
# DWARF location expressions. We also don't have any code that loads any thread
# specific segments at a different address for different threads, so there is
# no reason currently to try and load thread specific segments.

# RUN: yaml2obj %s -o %t
# RUN: lldb-test object-file %t | FileCheck %s


# CHECK:        Index: 0
# CHECK-NEXT:   ID: 0xffffffffffffffff
# CHECK-NEXT:   Name: PT_LOAD[0]
# CHECK-NEXT:   Type: container
# CHECK-NEXT:   Permissions: rw-
# CHECK-NEXT:   Thread specific: no
# CHECK-NEXT:   VM address: 0x1000
# CHECK-NEXT:   VM size: 16
# CHECK-NEXT:   File size: 16
# CHECK-NEXT:   Showing 1 subsections

# CHECK:        Index: 1
# CHECK-NEXT:   ID: 0xfffffffffffffffe
# CHECK-NEXT:   Name: PT_TLS[0]
# CHECK-NEXT:   Type: container
# CHECK-NEXT:   Permissions: rw-
# CHECK-NEXT:   Thread specific: yes
# CHECK-NEXT:   VM address: 0x1000
# CHECK-NEXT:   VM size: 16
# CHECK-NEXT:   File size: 0
# CHECK-NEXT:   Showing 1 subsections

# RUN: %lldb %t -b \
# RUN:       -o "image lookup -a 0x1000" \
# RUN:       -o "target modules load --file %t --slide 0" \
# RUN:       -o "image lookup -a 0x1000" \
# RUN:       -o "target dump section-load-list" \
# RUN:       | FileCheck --check-prefix=LOOKUP %s

# LOOKUP-LABEL: image lookup -a 0x1000
# LOOKUP:       Address: {{.*}}.PT_LOAD[0]..data + 0)
# LOOKUP:       target modules load
# LOOKUP:       image lookup -a 0x1000
# LOOKUP:       Address: {{.*}}.PT_LOAD[0]..data + 0)
# LOOKUP:       target dump section-load-list
# LOOKUP:       PT_TLS-overlap-PT_LOAD.yaml.tmp.PT_LOAD[0]
# LOOKUP-NOT:   PT_TLS-overlap-PT_LOAD.yaml.tmp.PT_TLS[0]

!ELF
FileHeader:
  Class:           ELFCLASS32
  Data:            ELFDATA2LSB
  Type:            ET_EXEC
  Machine:         EM_ARM
Sections:
  - Name:            .data
    Type:            SHT_PROGBITS
    Flags:           [ SHF_ALLOC, SHF_WRITE ]
    Address:         0x1000
    AddressAlign:    0x4
    Size:            0x10
  - Name:            .tbss
    Type:            SHT_NOBITS
    Flags:           [ SHF_ALLOC, SHF_WRITE, SHF_TLS ]
    Address:         0x1000
    AddressAlign:    0x4
    Size:            0x10
ProgramHeaders:
  - Type: PT_LOAD
    Flags: [ PF_W, PF_R ]
    VAddr: 0x1000
    Align: 0x4
    FirstSec: .data
    LastSec:  .data
  - Type: PT_TLS
    Flags: [ PF_R, PF_W ]
    VAddr: 0x1000
    Align: 0x4
    FirstSec: .tbss
    LastSec:  .tbss
llvm/lldb/test/Shell/ObjectFile/ELF/PT_TLS-overlap-PT_LOAD.yaml
