It means that the exact same values will be on the stack after your custom injected code, than before. Essentially means that your injected code does not push any value to the stack it does not pop later, and also it does not pop any values from the stack that it did not push (unless you save the value to, for example, a local variable first and then load it back later).
My project had a similar problem, when I was writing a method using Mono.Cecil to inline (specific) method calls. I solved it by basically injecting my custom code before all 'ret' instructions. (It's a bit more complicated than that, because most of the 'ret' instructions are removed during inlining, but you get the point.) 2011/7/7 Indiefreaks.com <[email protected]> > What do you mean stabilizing the stack? > > On 7 juil, 14:37, Alex <[email protected]> wrote: > > Hi, > > > > >Well, I tried that method but I get way too many return operations in > > > > some situations like when a switch operation occurs in the method. > > Moreover, if I fear that simply injecting my code before the > > OpCodes.Ret instruction wouldn't work neither in some cases like when > > a value is returned by the method. > > > > I don't think that's a problem as long as you correctly stabilize the > stack. > > > > Regards, > > Alex > > > > On Thu, Jul 7, 2011 at 2:30 PM, Indiefreaks.com > > > > > > > > <[email protected]> wrote: > > > Well, I tried that method but I get way too many return operations in > > > some situations like when a switch operation occurs in the method. > > > Moreover, if I fear that simply injecting my code before the > > > OpCodes.Ret instruction wouldn't work neither in some cases like when > > > a value is returned by the method. > > > > > I may also go down the route of cloning the current method and adding > > > it (with a different name) to the current class and then clear the > > > current method instructions and surround a call to the cached method > > > by my profiling code making sure that I catch the returned value if > > > different from "System.Void" to return it back once the original > > > method ends... > > > > > On 7 juil, 13:44, Alex <[email protected]> wrote: > > >> Hi, > > > > >> I think what you propose is the best way to achieve this. I'm not sure > > >> if 'ret' is the only opcode that can leave a method normally, though. > > > > >> Regards, > > >> Alex > > > > >> On Thu, Jul 7, 2011 at 11:47 AM, Indiefreaks.com > > > > >> <[email protected]> wrote: > > >> > Hi, > > > > >> > In my current Xna game profiler tool (learn more athttp:// > indiefreaks.com), > > >> > I'm wrapping each method that should be profiled with my profiling > > >> > code. > > > > >> > Right now, in order to do so, I'm getting the first instruction from > > >> > the MethodDefinition Body as well as the last one and inject my code > > >> > before them. > > > > >> > It works perfectly fine on most cases except when a control flow > > >> > operation code is set in the body. > > > > >> > My profiling code that is injected before the actual method is > invoked > > >> > works fine but because of the previous statement, the code I inject > at > > >> > what I would consider the end of the method never gets called or > gets > > >> > called inside an if or switch statement which crashes the resulting > > >> > assembly. > > > > >> > From what I understand, if I have such control flow operations, the > > >> > last instruction in a method body may not be the end of the current > > >> > Method. > > > > >> > I'm now considering parsing the whole method instructions and look > for > > >> > each OpCodes.Ret instance to add my custom code there but I wondered > > >> > if there was a better solution to find the end of a method or hook > to > > >> > it. > > > > >> > Thanks > > > > >> > -- > > >> > -- > > >> > mono-cecil- Masquer le texte des messages précédents - > > > > >> - Afficher le texte des messages précédents - > > > > > -- > > > -- > > > mono-cecil- Masquer le texte des messages précédents - > > > > - Afficher le texte des messages précédents - > > -- > -- > mono-cecil > -- -- mono-cecil
