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tsan: insert cfi directives into assembly (not fully working for now, though) 

llvm-svn: 163090
This commit is contained in:
Dmitry Vyukov 2012-09-02 11:24:07 +00:00
parent 72cddf33d9
commit b7f1852140
2 changed files with 93 additions and 2 deletions
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7
compiler-rt/lib/tsan/rtl/tsan_rtl.h
View File

@ -510,9 +510,12 @@ void AfterSleep(ThreadState *thr, uptr pc);
// The caller may not create the stack frame for itself at all,
// so we create a reserve stack frame for it (1024b must be enough).
#define HACKY_CALL(f) \
__asm__ __volatile__("sub $0x400, %%rsp;" \
__asm__ __volatile__("sub $1024, %%rsp;" \
"/*.cfi_adjust_cfa_offset 1024;*/" \
"call " #f "_thunk;" \
"add $0x400, %%rsp;" ::: "memory");
"add $1024, %%rsp;" \
"/*.cfi_adjust_cfa_offset -1024;*/" \
::: "memory", "cc");
#else
#define HACKY_CALL(f) f()
#endif

88
compiler-rt/lib/tsan/rtl/tsan_rtl_amd64.S
View File

@ -2,19 +2,41 @@
.globl __tsan_trace_switch_thunk
__tsan_trace_switch_thunk:
.cfi_startproc
# Save scratch registers.
push %rax
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %rax, 0
push %rcx
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %rcx, 0
push %rdx
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %rdx, 0
push %rsi
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %rsi, 0
push %rdi
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %rdi, 0
push %r8
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %r8, 0
push %r9
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %r9, 0
push %r10
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %r10, 0
push %r11
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %r11, 0
# Align stack frame.
push %rbx # non-scratch
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %rbx, 0
mov %rsp, %rbx # save current rsp
.cfi_def_cfa_register %rbx
shr $4, %rsp # clear 4 lsb, align to 16
shl $4, %rsp
@ -22,34 +44,78 @@ __tsan_trace_switch_thunk:
# Unalign stack frame back.
mov %rbx, %rsp # restore the original rsp
.cfi_def_cfa_register %rsp
pop %rbx
.cfi_adjust_cfa_offset -8
# Restore scratch registers.
pop %r11
.cfi_adjust_cfa_offset -8
pop %r10
.cfi_adjust_cfa_offset -8
pop %r9
.cfi_adjust_cfa_offset -8
pop %r8
.cfi_adjust_cfa_offset -8
pop %rdi
.cfi_adjust_cfa_offset -8
pop %rsi
.cfi_adjust_cfa_offset -8
pop %rdx
.cfi_adjust_cfa_offset -8
pop %rcx
.cfi_adjust_cfa_offset -8
pop %rax
.cfi_adjust_cfa_offset -8
.cfi_restore %rax
.cfi_restore %rbx
.cfi_restore %rcx
.cfi_restore %rdx
.cfi_restore %rsi
.cfi_restore %rdi
.cfi_restore %r8
.cfi_restore %r9
.cfi_restore %r10
.cfi_restore %r11
ret
.cfi_endproc
.globl __tsan_report_race_thunk
__tsan_report_race_thunk:
.cfi_startproc
# Save scratch registers.
push %rax
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %rax, 0
push %rcx
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %rcx, 0
push %rdx
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %rdx, 0
push %rsi
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %rsi, 0
push %rdi
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %rdi, 0
push %r8
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %r8, 0
push %r9
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %r9, 0
push %r10
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %r10, 0
push %r11
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %r11, 0
# Align stack frame.
push %rbx # non-scratch
.cfi_adjust_cfa_offset 8
.cfi_rel_offset %rbx, 0
mov %rsp, %rbx # save current rsp
.cfi_def_cfa_register %rbx
shr $4, %rsp # clear 4 lsb, align to 16
shl $4, %rsp
@ -57,18 +123,40 @@ __tsan_report_race_thunk:
# Unalign stack frame back.
mov %rbx, %rsp # restore the original rsp
.cfi_def_cfa_register %rsp
pop %rbx
.cfi_adjust_cfa_offset -8
# Restore scratch registers.
pop %r11
.cfi_adjust_cfa_offset -8
pop %r10
.cfi_adjust_cfa_offset -8
pop %r9
.cfi_adjust_cfa_offset -8
pop %r8
.cfi_adjust_cfa_offset -8
pop %rdi
.cfi_adjust_cfa_offset -8
pop %rsi
.cfi_adjust_cfa_offset -8
pop %rdx
.cfi_adjust_cfa_offset -8
pop %rcx
.cfi_adjust_cfa_offset -8
pop %rax
.cfi_adjust_cfa_offset -8
.cfi_restore %rax
.cfi_restore %rbx
.cfi_restore %rcx
.cfi_restore %rdx
.cfi_restore %rsi
.cfi_restore %rdi
.cfi_restore %r8
.cfi_restore %r9
.cfi_restore %r10
.cfi_restore %r11
ret
.cfi_endproc
#ifdef __linux__
/* We do not need executable stack. */