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Create StackFrame::FRAME_TRUST_PREWALKED trust type.

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This creates a new frame trust type for prewalked stack frames, as suggested in
the review of https://breakpad.appspot.com/620002/.

R=ted.mielczarek@gmail.com, mark@chromium.org

Review URL: https://breakpad.appspot.com/621002/



git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1208 4c0a9323-5329-0410-9bdc-e9ce6186880e
This commit is contained in:
chrisha@chromium.org
2013-08-23 19:41:36 +00:00
parent 1e57990cee
commit 16a880e135
3 changed files with 17 additions and 8 deletions
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15
src/google_breakpad/processor/stack_frame.h
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@@ -45,12 +45,13 @@ struct StackFrame {
// stack scanning, it can wind up with dubious frames.
// In rough order of "trust metric".
enum FrameTrust {
FRAME_TRUST_NONE, // Unknown
FRAME_TRUST_SCAN, // Scanned the stack, found this
FRAME_TRUST_CFI_SCAN, // Scanned the stack using call frame info, found this
FRAME_TRUST_FP, // Derived from frame pointer
FRAME_TRUST_CFI, // Derived from call frame info
FRAME_TRUST_CONTEXT // Given as instruction pointer in a context
FRAME_TRUST_NONE, // Unknown
FRAME_TRUST_SCAN, // Scanned the stack, found this
FRAME_TRUST_CFI_SCAN, // Found while scanning stack using call frame info
FRAME_TRUST_FP, // Derived from frame pointer
FRAME_TRUST_CFI, // Derived from call frame info
FRAME_TRUST_PREWALKED, // Explicitly provided by some external stack walker.
FRAME_TRUST_CONTEXT // Given as instruction pointer in a context
};
StackFrame()
@@ -70,6 +71,8 @@ struct StackFrame {
switch (trust) {
case StackFrame::FRAME_TRUST_CONTEXT:
return "given as instruction pointer in context";
case StackFrame::FRAME_TRUST_PREWALKED:
return "recovered by external stack walker";
case StackFrame::FRAME_TRUST_CFI:
return "call frame info";
case StackFrame::FRAME_TRUST_CFI_SCAN: