Author: fijal
Branch:
Changeset: r82118:a204ce60d060
Date: 2016-02-08 22:03 +0100
http://bitbucket.org/pypy/pypy/changeset/a204ce60d060/
Log: kill some special code that we're not using any more
diff --git a/rpython/rlib/rvmprof/src/vmprof_getpc.h
b/rpython/rlib/rvmprof/src/vmprof_getpc.h
--- a/rpython/rlib/rvmprof/src/vmprof_getpc.h
+++ b/rpython/rlib/rvmprof/src/vmprof_getpc.h
@@ -111,47 +111,9 @@
// PC_FROM_UCONTEXT in config.h. The only thing we need to do here,
// then, is to do the magic call-unrolling for systems that support it.
-// -- Special case 1: linux x86, for which we have CallUnrollInfo
#if defined(__linux) && defined(__i386) && defined(__GNUC__)
-static const CallUnrollInfo callunrollinfo[] = {
- // Entry to a function: push %ebp; mov %esp,%ebp
- // Top-of-stack contains the caller IP.
- { 0,
- {0x55, 0x89, 0xe5}, 3,
- 0
- },
- // Entry to a function, second instruction: push %ebp; mov %esp,%ebp
- // Top-of-stack contains the old frame, caller IP is +4.
- { -1,
- {0x55, 0x89, 0xe5}, 3,
- 4
- },
- // Return from a function: RET.
- // Top-of-stack contains the caller IP.
- { 0,
- {0xc3}, 1,
- 0
- }
-};
-
intptr_t GetPC(ucontext_t *signal_ucontext) {
- // See comment above struct CallUnrollInfo. Only try instruction
- // flow matching if both eip and esp looks reasonable.
- const int eip = signal_ucontext->uc_mcontext.gregs[REG_EIP];
- const int esp = signal_ucontext->uc_mcontext.gregs[REG_ESP];
- if ((eip & 0xffff0000) != 0 && (~eip & 0xffff0000) != 0 &&
- (esp & 0xffff0000) != 0) {
- char* eip_char = reinterpret_cast<char*>(eip);
- for (int i = 0; i < sizeof(callunrollinfo)/sizeof(*callunrollinfo); ++i) {
- if (!memcmp(eip_char + callunrollinfo[i].pc_offset,
- callunrollinfo[i].ins, callunrollinfo[i].ins_size)) {
- // We have a match.
- intptr_t *retaddr = (intptr_t*)(esp +
callunrollinfo[i].return_sp_offset);
- return *retaddr;
- }
- }
- }
- return eip;
+ return signal_ucontext->uc_mcontext.gregs[REG_EIP];
}
// Special case #2: Windows, which has to do something totally different.
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